linux-2.6-block.git
7 weeks agortnetlink: do not depend on RTNL for IFLA_TXQLEN output
Eric Dumazet [Fri, 3 May 2024 19:20:54 +0000 (19:20 +0000)]
rtnetlink: do not depend on RTNL for IFLA_TXQLEN output

rtnl_fill_ifinfo() can read dev->tx_queue_len locklessly,
granted we add corresponding READ_ONCE()/WRITE_ONCE() annotations.

Add missing READ_ONCE(dev->tx_queue_len) in teql_enqueue()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agortnetlink: do not depend on RTNL for IFLA_IFNAME output
Eric Dumazet [Fri, 3 May 2024 19:20:53 +0000 (19:20 +0000)]
rtnetlink: do not depend on RTNL for IFLA_IFNAME output

We can use netdev_copy_name() to no longer rely on RTNL
to fetch dev->name.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agortnetlink: do not depend on RTNL for IFLA_QDISC output
Eric Dumazet [Fri, 3 May 2024 19:20:52 +0000 (19:20 +0000)]
rtnetlink: do not depend on RTNL for IFLA_QDISC output

dev->qdisc can be read using RCU protection.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agoMerge branch 'net-qede-don-t-restrict-error-codes'
Paolo Abeni [Tue, 7 May 2024 09:08:16 +0000 (11:08 +0200)]
Merge branch 'net-qede-don-t-restrict-error-codes'

 says:

====================
net: qede: don't restrict error codes

This series fixes the qede driver, so that when a helper function fails,
then the callee should return the returned error code, instead just
assuming that the error is eg. -EINVAL.

The patches in this series, reduces the change of future bugs, so new
error codes can be returned from the helpers, without having to update
the call sites.

This is a follow-up to my recent series "net: qede: avoid overruling
error codes", which fixed the cases where the implicit assumption of
failing with specific error codes had been broken.
https://lore.kernel.org/netdev/20240426091227.78060-1-ast@fiberby.net/

Asbjørn Sloth Tønnesen (3):
  net: qede: use return from qede_parse_actions() for flow_spec
  net: qede: use return from qede_flow_spec_validate_unused()
  net: qede: use return from qede_flow_parse_ports()

 .../net/ethernet/qlogic/qede/qede_filter.c    | 27 ++++++++++++-------
 1 file changed, 18 insertions(+), 9 deletions(-)
====================

Link: https://lore.kernel.org/r/20240503105505.839342-1-ast@fiberby.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: qede: use return from qede_flow_parse_ports()
Asbjørn Sloth Tønnesen [Fri, 3 May 2024 10:55:03 +0000 (10:55 +0000)]
net: qede: use return from qede_flow_parse_ports()

When calling qede_flow_parse_ports(), then the
return code was only used for a non-zero check,
and then -EINVAL was returned.

qede_flow_parse_ports() can currently fail with:
* -EINVAL

This patch changes qede_flow_parse_v{4,6}_common() to
use the actual return code from qede_flow_parse_ports(),
so it's no longer assumed that all errors are -EINVAL.

Only compile tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: qede: use return from qede_flow_spec_validate_unused()
Asbjørn Sloth Tønnesen [Fri, 3 May 2024 10:55:02 +0000 (10:55 +0000)]
net: qede: use return from qede_flow_spec_validate_unused()

When calling qede_flow_spec_validate_unused() then
the return code was only used for a non-zero check,
and then -EOPNOTSUPP was returned.

qede_flow_spec_validate_unused() can currently fail with:
* -EOPNOTSUPP

This patch changes qede_flow_spec_to_rule() to use the
actual return code from qede_flow_spec_validate_unused(),
so it's no longer assumed that all errors are -EOPNOTSUPP.

Only compile tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: qede: use return from qede_parse_actions() for flow_spec
Asbjørn Sloth Tønnesen [Fri, 3 May 2024 10:55:01 +0000 (10:55 +0000)]
net: qede: use return from qede_parse_actions() for flow_spec

In qede_flow_spec_to_rule(), when calling
qede_parse_actions() then the return code
was only used for a non-zero check, and then
-EINVAL was returned.

qede_parse_actions() can currently fail with:
* -EINVAL
* -EOPNOTSUPP

Commit 319a1d19471e ("flow_offload: check for
basic action hw stats type") broke the implicit
assumption that it could only fail with -EINVAL,
by changing it to return -EOPNOTSUPP, when hardware
stats are requested.

However AFAICT it's not possible to trigger
qede_parse_actions() to return -EOPNOTSUPP, when
called from qede_flow_spec_to_rule(), as hardware
stats can't be requested by ethtool_rx_flow_rule_create().

This patch changes qede_flow_spec_to_rule() to use
the actual return code from qede_parse_actions(),
so it's no longer assumed that all errors are -EINVAL.

Only compile tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agoMerge tag 'ipsec-next-2024-05-03' of git://git.kernel.org/pub/scm/linux/kernel/git...
Jakub Kicinski [Tue, 7 May 2024 02:14:56 +0000 (19:14 -0700)]
Merge tag 'ipsec-next-2024-05-03' of git://git./linux/kernel/git/klassert/ipsec-next

Steffen Klassert says:

====================
pull request (net-next): ipsec-next 2024-05-03

1) Remove Obsolete UDP_ENCAP_ESPINUDP_NON_IKE Support.
   This was defined by an early version of an IETF draft
   that did not make it to a standard.

2) Introduce direction attribute for xfrm states.
   xfrm states have a direction, a stsate can be used
   either for input or output packet processing.
   Add a direction to xfrm states to make it clear
   for what a xfrm state is used.

* tag 'ipsec-next-2024-05-03' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next:
  xfrm: Restrict SA direction attribute to specific netlink message types
  xfrm: Add dir validation to "in" data path lookup
  xfrm: Add dir validation to "out" data path lookup
  xfrm: Add Direction to the SA in or out
  udpencap: Remove Obsolete UDP_ENCAP_ESPINUDP_NON_IKE Support
====================

Link: https://lore.kernel.org/r/20240503082732.2835810-1-steffen.klassert@secunet.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agomptcp: fix typos in comments
Shi-Sheng Yang [Thu, 2 May 2024 15:47:40 +0000 (23:47 +0800)]
mptcp: fix typos in comments

This patch fixes the spelling mistakes in comments.
The changes were generated using codespell and reviewed manually.

eariler -> earlier
greceful -> graceful

Signed-off-by: Shi-Sheng Yang <fourcolor4c@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Link: https://lore.kernel.org/r/20240502154740.249839-1-fourcolor4c@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoocteontx2-pf: Treat truncation of IRQ name as an error
Simon Horman [Fri, 3 May 2024 11:11:58 +0000 (12:11 +0100)]
octeontx2-pf: Treat truncation of IRQ name as an error

According to GCC, the constriction of irq_name in otx2_open()
may, theoretically, be truncated.

This patch takes the approach of treating such a situation as an error
which it detects by making use of the return value of snprintf, which is
the total number of bytes, excluding the trailing '\0', that would have
been written.

Based on the approach taken to a similar problem in
commit 54b909436ede ("rtc: fix snprintf() checking in is_rtc_hctosys()")

Flagged by gcc-13 W=1 builds as:

.../otx2_pf.c:1933:58: warning: 'snprintf' output may be truncated before the last format character [-Wformat-truncation=]
 1933 |                 snprintf(irq_name, NAME_SIZE, "%s-rxtx-%d", pf->netdev->name,
      |                                                          ^
.../otx2_pf.c:1933:17: note: 'snprintf' output between 8 and 33 bytes into a destination of size 32
 1933 |                 snprintf(irq_name, NAME_SIZE, "%s-rxtx-%d", pf->netdev->name,
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 1934 |                          qidx);
      |                          ~~~~~

Compile tested only.

Tested-by: Geetha sowjanya <gakula@marvell.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240503-octeon2-pf-irq_name-truncation-v2-1-91099177b942@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoatm/fore200e: Delete unused 'fore200e_boards'
Dr. David Alan Gilbert [Fri, 3 May 2024 00:18:22 +0000 (01:18 +0100)]
atm/fore200e: Delete unused 'fore200e_boards'

This list looks like it's been unused since the OF conversion in
2008 in

commit 826b6cfcd5d4 ("fore200e: Convert over to pure OF driver.")

This also means we can remove the 'entry' member for the list.

Build tested only.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Breno Leitao <leitao@debian.org>
Link: https://lore.kernel.org/r/20240503001822.183061-1-linux@treblig.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agogve: Implement queue api
Shailend Chand [Wed, 1 May 2024 23:25:49 +0000 (23:25 +0000)]
gve: Implement queue api

The new netdev queue api is implemented for gve.

Tested-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Shailend Chand <shailend@google.com>
Link: https://lore.kernel.org/all/20240501232549.1327174-11-shailend@google.com/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMerge branch 'add-tcp-fraglist-gro-support'
Paolo Abeni [Mon, 6 May 2024 09:54:08 +0000 (11:54 +0200)]
Merge branch 'add-tcp-fraglist-gro-support'

Felix Fietkau says:

====================
Add TCP fraglist GRO support

When forwarding TCP after GRO, software segmentation is very expensive,
especially when the checksum needs to be recalculated.
One case where that's currently unavoidable is when routing packets over
PPPoE. Performance improves significantly when using fraglist GRO
implemented in the same way as for UDP.

When NETIF_F_GRO_FRAGLIST is enabled, perform a lookup for an established
socket in the same netns as the receiving device. While this may not
cover all relevant use cases in multi-netns configurations, it should be
good enough for most configurations that need this.

Here's a measurement of running 2 TCP streams through a MediaTek MT7622
device (2-core Cortex-A53), which runs NAT with flow offload enabled from
one ethernet port to PPPoE on another ethernet port + cake qdisc set to
1Gbps.

rx-gro-list off: 630 Mbit/s, CPU 35% idle
rx-gro-list on:  770 Mbit/s, CPU 40% idle

Changes since v4:
 - add likely() to prefer the non-fraglist path in check

Changes since v3:
 - optimize __tcpv4_gso_segment_csum
 - add unlikely()
 - reorder dev_net/skb_gro_network_header calls after NETIF_F_GRO_FRAGLIST
   check
 - add support for ipv6 nat
 - drop redundant pskb_may_pull check

Changes since v2:
 - create tcp_gro_header_pull helper function to pull tcp header only once
 - optimize __tcpv4_gso_segment_list_csum, drop obsolete flags check

Changes since v1:
 - revert bogus tcp flags overwrite on segmentation
 - fix kbuild issue with !CONFIG_IPV6
 - only perform socket lookup for the first skb in the GRO train

Changes since RFC:
 - split up patches
 - handle TCP flags mutations
====================

Link: https://lore.kernel.org/r/20240502084450.44009-1-nbd@nbd.name
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: add heuristic for enabling TCP fraglist GRO
Felix Fietkau [Thu, 2 May 2024 08:44:47 +0000 (10:44 +0200)]
net: add heuristic for enabling TCP fraglist GRO

When forwarding TCP after GRO, software segmentation is very expensive,
especially when the checksum needs to be recalculated.
One case where that's currently unavoidable is when routing packets over
PPPoE. Performance improves significantly when using fraglist GRO
implemented in the same way as for UDP.

When NETIF_F_GRO_FRAGLIST is enabled, perform a lookup for an established
socket in the same netns as the receiving device. While this may not
cover all relevant use cases in multi-netns configurations, it should be
good enough for most configurations that need this.

Here's a measurement of running 2 TCP streams through a MediaTek MT7622
device (2-core Cortex-A53), which runs NAT with flow offload enabled from
one ethernet port to PPPoE on another ethernet port + cake qdisc set to
1Gbps.

rx-gro-list off: 630 Mbit/s, CPU 35% idle
rx-gro-list on:  770 Mbit/s, CPU 40% idle

Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: create tcp_gro_header_pull helper function
Felix Fietkau [Thu, 2 May 2024 08:44:46 +0000 (10:44 +0200)]
net: create tcp_gro_header_pull helper function

Pull the code out of tcp_gro_receive in order to access the tcp header
from tcp4/6_gro_receive.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: create tcp_gro_lookup helper function
Felix Fietkau [Thu, 2 May 2024 08:44:45 +0000 (10:44 +0200)]
net: create tcp_gro_lookup helper function

This pulls the flow port matching out of tcp_gro_receive, so that it can be
reused for the next change, which adds the TCP fraglist GRO heuristic.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: add code for TCP fraglist GRO
Felix Fietkau [Thu, 2 May 2024 08:44:44 +0000 (10:44 +0200)]
net: add code for TCP fraglist GRO

This implements fraglist GRO similar to how it's handled in UDP, however
no functional changes are added yet. The next change adds a heuristic for
using fraglist GRO instead of regular GRO.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: add support for segmenting TCP fraglist GSO packets
Felix Fietkau [Thu, 2 May 2024 08:44:43 +0000 (10:44 +0200)]
net: add support for segmenting TCP fraglist GSO packets

Preparation for adding TCP fraglist GRO support. It expects packets to be
combined in a similar way as UDP fraglist GSO packets.
For IPv4 packets, NAT is handled in the same way as UDP fraglist GSO.

Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: move skb_gro_receive_list from udp to core
Felix Fietkau [Thu, 2 May 2024 08:44:42 +0000 (10:44 +0200)]
net: move skb_gro_receive_list from udp to core

This helper function will be used for TCP fraglist GRO support

Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: microchip: lan743x: Reduce PTP timeout on HW failure
Rengarajan S [Thu, 2 May 2024 05:03:00 +0000 (10:33 +0530)]
net: microchip: lan743x: Reduce PTP timeout on HW failure

The PTP_CMD_CTL is a self clearing register which controls the PTP clock
values. In the current implementation driver waits for a duration of 20
sec in case of HW failure to clear the PTP_CMD_CTL register bit. This
timeout of 20 sec is very long to recognize a HW failure, as it is
typically cleared in one clock(<16ns). Hence reducing the timeout to 1 sec
would be sufficient to conclude if there is any HW failure observed. The
usleep_range will sleep somewhere between 1 msec to 20 msec for each
iteration. By setting the PTP_CMD_CTL_TIMEOUT_CNT to 50 the max timeout
is extended to 1 sec.

Signed-off-by: Rengarajan S <rengarajan.s@microchip.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240502050300.38689-1-rengarajan.s@microchip.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agoMerge branch 'gve-queue-api'
David S. Miller [Sun, 5 May 2024 13:35:48 +0000 (14:35 +0100)]
Merge branch 'gve-queue-api'

Shailend Chand says:

====================
gve: Implement queue api

Following the discussion on
https://patchwork.kernel.org/project/linux-media/patch/20240305020153.2787423-2-almasrymina@google.com/,
the queue api defined by Mina is implemented for gve.

The first patch is just Mina's introduction of the api. The rest of the
patches make surgical changes in gve to enable it to work correctly with
only a subset of queues present (thus far it had assumed that either all
queues are up or all are down). The final patch has the api
implementation.

Changes since v1: clang warning fixes, kdoc warning fix, and addressed
review comments.
====================

Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agogve: Alloc and free QPLs with the rings
Shailend Chand [Wed, 1 May 2024 23:25:48 +0000 (23:25 +0000)]
gve: Alloc and free QPLs with the rings

Every tx and rx ring has its own queue-page-list (QPL) that serves as
the bounce buffer. Previously we were allocating QPLs for all queues
before the queues themselves were allocated and later associating a QPL
with a queue. This is avoidable complexity: it is much more natural for
each queue to allocate and free its own QPL.

Moreover, the advent of new queue-manipulating ndo hooks make it hard to
keep things as is: we would need to transfer a QPL from an old queue to
a new queue, and that is unpleasant.

Tested-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Shailend Chand <shailend@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agogve: Account for stopped queues when reading NIC stats
Shailend Chand [Wed, 1 May 2024 23:25:47 +0000 (23:25 +0000)]
gve: Account for stopped queues when reading NIC stats

We now account for the fact that the NIC might send us stats for a
subset of queues. Without this change, gve_get_ethtool_stats might make
an invalid access on the priv->stats_report->stats array.

Tested-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Shailend Chand <shailend@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agogve: Reset Rx ring state in the ring-stop funcs
Shailend Chand [Wed, 1 May 2024 23:25:46 +0000 (23:25 +0000)]
gve: Reset Rx ring state in the ring-stop funcs

This does not fix any existing bug. In anticipation of the ndo queue api
hooks that alloc/free/start/stop a single Rx queue, the already existing
per-queue stop functions are being made more robust. Specifically for
this use case: rx_queue_n.stop() + rx_queue_n.start()

Note that this is not the use case being used in devmem tcp (the first
place these new ndo hooks would be used). There the usecase is:
new_queue.alloc() + old_queue.stop() + new_queue.start() + old_queue.free()

Tested-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Shailend Chand <shailend@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agogve: Avoid rescheduling napi if on wrong cpu
Shailend Chand [Wed, 1 May 2024 23:25:45 +0000 (23:25 +0000)]
gve: Avoid rescheduling napi if on wrong cpu

In order to make possible the implementation of per-queue ndo hooks,
gve_turnup was changed in a previous patch to account for queues already
having some unprocessed descriptors: it does a one-off napi_schdule to
handle them. If conditions of consistent high traffic persist in the
immediate aftermath of this, the poll routine for a queue can be "stuck"
on the cpu on which the ndo hooks ran, instead of the cpu its irq has
affinity with.

This situation is exacerbated by the fact that the ndo hooks for all the
queues are invoked on the same cpu, potentially causing all the napi
poll routines to be residing on the same cpu.

A self correcting mechanism in the poll method itself solves this
problem.

Tested-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Shailend Chand <shailend@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agogve: Make gve_turnup work for nonempty queues
Shailend Chand [Wed, 1 May 2024 23:25:44 +0000 (23:25 +0000)]
gve: Make gve_turnup work for nonempty queues

gVNIC has a requirement that all queues have to be quiesced before any
queue is operated on (created or destroyed). To enable the
implementation of future ndo hooks that work on a single queue, we need
to evolve gve_turnup to account for queues already having some
unprocessed descriptors in the ring.

Say rxq 4 is being stopped and started via the queue api. Due to gve's
requirement of quiescence, queues 0 through 3 are not processing their
rings while queue 4 is being toggled. Once they are made live, these
queues need to be poked to cause them to check their rings for
descriptors that were written during their brief period of quiescence.

Tested-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Shailend Chand <shailend@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agogve: Make gve_turn(up|down) ignore stopped queues
Shailend Chand [Wed, 1 May 2024 23:25:43 +0000 (23:25 +0000)]
gve: Make gve_turn(up|down) ignore stopped queues

Currently the queues are either all live or all dead, toggling from one
state to the other via the ndo open and stop hooks. The future addition
of single-queue ndo hooks changes this, and thus gve_turnup and
gve_turndown should evolve to account for a state where some queues are
live and some aren't.

Tested-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Shailend Chand <shailend@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agogve: Add adminq funcs to add/remove a single Rx queue
Shailend Chand [Wed, 1 May 2024 23:25:42 +0000 (23:25 +0000)]
gve: Add adminq funcs to add/remove a single Rx queue

This allows for implementing future ndo hooks that act on a single
queue.

Tested-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Shailend Chand <shailend@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agogve: Make the GQ RX free queue funcs idempotent
Shailend Chand [Wed, 1 May 2024 23:25:41 +0000 (23:25 +0000)]
gve: Make the GQ RX free queue funcs idempotent

Although this is not fixing any existing double free bug, making these
functions idempotent allows for a simpler implementation of future ndo
hooks that act on a single queue.

Tested-by: Mina Almasry <almasrymina@google.com>
Reviewed-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Signed-off-by: Shailend Chand <shailend@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agoqueue_api: define queue api
Mina Almasry [Wed, 1 May 2024 23:25:40 +0000 (23:25 +0000)]
queue_api: define queue api

This API enables the net stack to reset the queues used for devmem TCP.

Signed-off-by: Mina Almasry <almasrymina@google.com>
Signed-off-by: Shailend Chand <shailend@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agoRevert "net: mirror skb frag ref/unref helpers"
Mina Almasry [Thu, 2 May 2024 17:54:22 +0000 (10:54 -0700)]
Revert "net: mirror skb frag ref/unref helpers"

This reverts commit a580ea994fd37f4105028f5a85c38ff6508a2b25.

This revert is to resolve Dragos's report of page_pool leak here:
https://lore.kernel.org/lkml/20240424165646.1625690-2-dtatulea@nvidia.com/

The reverted patch interacts very badly with commit 2cc3aeb5eccc ("skbuff:
Fix a potential race while recycling page_pool packets"). The reverted
commit hopes that the pp_recycle + is_pp_page variables do not change
between the skb_frag_ref and skb_frag_unref operation. If such a change
occurs, the skb_frag_ref/unref will not operate on the same reference type.
In the case of Dragos's report, the grabbed ref was a pp ref, but the unref
was a page ref, because the pp_recycle setting on the skb was changed.

Attempting to fix this issue on the fly is risky. Lets revert and I hope
to reland this with better understanding and testing to ensure we don't
regress some edge case while streamlining skb reffing.

Fixes: a580ea994fd3 ("net: mirror skb frag ref/unref helpers")
Reported-by: Dragos Tatulea <dtatulea@nvidia.com>
Signed-off-by: Mina Almasry <almasrymina@google.com>
Link: https://lore.kernel.org/r/20240502175423.2456544-1-almasrymina@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agobnxt: fix bnxt_get_avail_msix() returning negative values
David Wei [Thu, 2 May 2024 20:37:57 +0000 (13:37 -0700)]
bnxt: fix bnxt_get_avail_msix() returning negative values

Current net-next/main does not boot for older chipsets e.g. Stratus.

Sample dmesg:
[   11.368315] bnxt_en 0000:02:00.0 (unnamed net_device) (uninitialized): Able to reserve only 0 out of 9 requested RX rings
[   11.390181] bnxt_en 0000:02:00.0 (unnamed net_device) (uninitialized): Unable to reserve tx rings
[   11.438780] bnxt_en 0000:02:00.0 (unnamed net_device) (uninitialized): 2nd rings reservation failed.
[   11.487559] bnxt_en 0000:02:00.0 (unnamed net_device) (uninitialized): Not enough rings available.
[   11.506012] bnxt_en 0000:02:00.0: probe with driver bnxt_en failed with error -12

This is caused by bnxt_get_avail_msix() returning a negative value for
these chipsets not using the new resource manager i.e. !BNXT_NEW_RM.
This in turn causes hwr.cp in __bnxt_reserve_rings() to be set to 0.

In the current call stack, __bnxt_reserve_rings() is called from
bnxt_set_dflt_rings() before bnxt_init_int_mode(). Therefore,
bp->total_irqs is always 0 and for !BNXT_NEW_RM bnxt_get_avail_msix()
always returns a negative number.

Historically, MSIX vectors were requested by the RoCE driver during
run-time and bnxt_get_avail_msix() was used for this purpose. Today,
RoCE MSIX vectors are statically allocated. bnxt_get_avail_msix() should
only be called for the BNXT_NEW_RM() case to reserve the MSIX ahead of
time for RoCE use.

bnxt_get_avail_msix() is also be simplified to handle the BNXT_NEW_RM()
case only.

Fixes: d630624ebd70 ("bnxt_en: Utilize ulp client resources if RoCE is not registered")
Signed-off-by: David Wei <dw@davidwei.uk>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/20240502203757.3761827-1-dw@davidwei.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agonet: no longer acquire RTNL in threaded_show()
Eric Dumazet [Thu, 2 May 2024 17:39:26 +0000 (17:39 +0000)]
net: no longer acquire RTNL in threaded_show()

dev->threaded can be read locklessly, if we add
corresponding READ_ONCE()/WRITE_ONCE() annotations.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20240502173926.2010646-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agotools: ynl: add --list-ops and --list-msgs to CLI
Jakub Kicinski [Thu, 2 May 2024 16:40:43 +0000 (09:40 -0700)]
tools: ynl: add --list-ops and --list-msgs to CLI

I often forget the exact naming of ops and have to look at
the spec to find it. Add support for listing the operations:

  $ ./cli.py --spec .../netdev.yaml --list-ops
  dev-get  [ do, dump ]
  page-pool-get  [ do, dump ]
  page-pool-stats-get  [ do, dump ]
  queue-get  [ do, dump ]
  napi-get  [ do, dump ]
  qstats-get  [ dump ]

For completeness also support listing all ops (including
notifications:

  # ./cli.py --spec .../netdev.yaml --list-msgs
  dev-get  [ dump, do ]
  dev-add-ntf  [ notify ]
  dev-del-ntf  [ notify ]
  dev-change-ntf  [ notify ]
  page-pool-get  [ dump, do ]
  page-pool-add-ntf  [ notify ]
  page-pool-del-ntf  [ notify ]
  page-pool-change-ntf  [ notify ]
  page-pool-stats-get  [ dump, do ]
  queue-get  [ dump, do ]
  napi-get  [ dump, do ]
  qstats-get  [ dump ]

Use double space after the name for slightly easier to read
output.

Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Donald Hunter <donald.hunter@gmail.com>
Link: https://lore.kernel.org/r/20240502164043.2130184-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMerge branch 'rtnetlink-rtnl_stats_dump-changes'
Jakub Kicinski [Fri, 3 May 2024 22:04:12 +0000 (15:04 -0700)]
Merge branch 'rtnetlink-rtnl_stats_dump-changes'

Eric Dumazet says:

====================
rtnetlink: rtnl_stats_dump() changes

Getting rid of RTNL in rtnl_stats_dump() looks challenging.

In the meantime, we can:

1) Avoid RTNL acquisition for the final NLMSG_DONE marker.

2) Use for_each_netdev_dump() instead of the net->dev_index_head[]
   hash table.
====================

Link: https://lore.kernel.org/r/20240502113748.1622637-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agortnetlink: use for_each_netdev_dump() in rtnl_stats_dump()
Eric Dumazet [Thu, 2 May 2024 11:37:48 +0000 (11:37 +0000)]
rtnetlink: use for_each_netdev_dump() in rtnl_stats_dump()

Switch rtnl_stats_dump() to use for_each_netdev_dump()
instead of net->dev_index_head[] hash table.

This makes the code much easier to read, and fixes
scalability issues.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20240502113748.1622637-3-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agortnetlink: change rtnl_stats_dump() return value
Eric Dumazet [Thu, 2 May 2024 11:37:47 +0000 (11:37 +0000)]
rtnetlink: change rtnl_stats_dump() return value

By returning 0 (or an error) instead of skb->len,
we allow NLMSG_DONE to be appended to the current
skb at the end of a dump, saving a couple of recvmsg()
system calls.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20240502113748.1622637-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMerge branch 'net-sysctl-sentinel'
David S. Miller [Fri, 3 May 2024 12:29:43 +0000 (13:29 +0100)]
Merge branch 'net-sysctl-sentinel'

Joel Granados says:

====================
sysctl: Remove sentinel elements from networking

What?
These commits remove the sentinel element (last empty element) from the
sysctl arrays of all the files under the "net/" directory that register
a sysctl array. The merging of the preparation patches [4] to mainline
allows us to just remove sentinel elements without changing behavior.
This is safe because the sysctl registration code (register_sysctl() and
friends) use the array size in addition to checking for a sentinel [1].

Why?
By removing the sysctl sentinel elements we avoid kernel bloat as
ctl_table arrays get moved out of kernel/sysctl.c into their own
respective subsystems. This move was started long ago to avoid merge
conflicts; the sentinel removal bit came after Mathew Wilcox suggested
it to avoid bloating the kernel by one element as arrays moved out. This
patchset will reduce the overall build time size of the kernel and run
time memory bloat by about ~64 bytes per declared ctl_table array (more
info here [5]).

When are we done?
There are 4 patchest (25 commits [2]) that are still outstanding to
completely remove the sentinels: files under "net/" (this patchset),
files under "kernel/" dir, misc dirs (files under mm/ security/ and
others) and the final set that removes the unneeded check for ->procname
== NULL.

Testing:
* Ran sysctl selftests (./tools/testing/selftests/sysctl/sysctl.sh)
* Ran this through 0-day with no errors or warnings

Savings in vmlinux:
  A total of 64 bytes per sentinel is saved after removal; I measured in
  x86_64 to give an idea of the aggregated savings. The actual savings
  will depend on individual kernel configuration.
    * bloat-o-meter
        - The "yesall" config saves 3976 bytes (bloat-o-meter output [6])
        - A reduced config [3] saves 1263 bytes (bloat-o-meter output [7])

Savings in allocated memory:
  None in this set but will occur when the superfluous allocations are
  removed from proc_sysctl.c. I include it here for context. The
  estimated savings during boot for config [3] are 6272 bytes. See [8]
  for how to measure it.

Comments/feedback greatly appreciated

Changes in v6:
- Rebased onto net-next/main.
- Besides re-running my cocci scripts, I ran a new find script [9].
  Found 0 hits in net/
- Moved "i" variable declaraction out of for() in sysctl_core_net_init
- Removed forgotten sentinel in mpls_table
- Removed CONFIG_AX25_DAMA_SLAVE guard from net/ax25/ax25_ds_timer.c. It
  is not needed because that file is compiled only when
  CONFIG_AX25_DAMA_SLAVE is set.
- When traversing smc_table, stop on ARRAY_SIZE instead of ARRAY_SIZE-1.
- Link to v5: https://lore.kernel.org/r/20240426-jag-sysctl_remset_net-v5-0-e3b12f6111a6@samsung.com

Changes in v5:
- Added net files with additional variable to my test .config so the
  typo can be caught next time.
- Fixed typo tabel_size -> table_size
- Link to v4: https://lore.kernel.org/r/20240425-jag-sysctl_remset_net-v4-0-9e82f985777d@samsung.com

Changes in v4:
- Keep reverse xmas tree order when introducing new variables
- Use a table_size variable to keep the value of ARRAY_SIZE
- Separated the original "networking: Remove the now superfluous
  sentinel elements from ctl_table arra" into smaller commits to ease
  review
- Merged x.25 and ax.25 commits together.
- Removed any SOB from the commits that were changed
- Link to v3: https://lore.kernel.org/r/20240412-jag-sysctl_remset_net-v3-0-11187d13c211@samsung.com

Changes in v3:
- Reworkded ax.25
  - Added a BUILD_BUG_ON for the ax.25 commit
  - Added a CONFIG_AX25_DAMA_SLAVE guard where needed
- Link to v2: https://lore.kernel.org/r/20240328-jag-sysctl_remset_net-v2-0-52c9fad9a1af@samsung.com

Changes in v2:
- Rebased to v6.9-rc1
- Removed unneeded comment from sysctl_net_ax25.c
- Link to v1: https://lore.kernel.org/r/20240314-jag-sysctl_remset_net-v1-0-aa26b44d29d9@samsung.com
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agoax.25: x.25: Remove the now superfluous sentinel elements from ctl_table array
Joel Granados [Wed, 1 May 2024 09:29:32 +0000 (11:29 +0200)]
ax.25: x.25: Remove the now superfluous sentinel elements from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which will
reduce the overall build time size of the kernel and run time memory
bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

Avoid a buffer overflow when traversing the ctl_table by ensuring that
AX25_MAX_VALUES is the same as the size of ax25_param_table. This is
done with a BUILD_BUG_ON where ax25_param_table is defined and a
CONFIG_AX25_DAMA_SLAVE guard in the unnamed enum definition as well as
in the ax25_dev_device_up and ax25_ds_set_timer functions.

The overflow happened when the sentinel was removed from
ax25_param_table. The sentinel's data element was changed when
CONFIG_AX25_DAMA_SLAVE was undefined. This had no adverse effects as it
still stopped on the sentinel's null procname but needed to be addressed
once the sentinel was removed.

Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agoappletalk: Remove the now superfluous sentinel elements from ctl_table array
Joel Granados [Wed, 1 May 2024 09:29:31 +0000 (11:29 +0200)]
appletalk: Remove the now superfluous sentinel elements from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which will
reduce the overall build time size of the kernel and run time memory
bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

Remove sentinel from atalk_table ctl_table array.

Acked-by: Kees Cook <keescook@chromium.org> # loadpin & yama
Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agonetfilter: Remove the now superfluous sentinel elements from ctl_table array
Joel Granados [Wed, 1 May 2024 09:29:30 +0000 (11:29 +0200)]
netfilter: Remove the now superfluous sentinel elements from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which will
reduce the overall build time size of the kernel and run time memory
bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

* Remove sentinel elements from ctl_table structs
* Remove instances where an array element is zeroed out to make it look
  like a sentinel. This is not longer needed and is safe after commit
  c899710fe7f9 ("networking: Update to register_net_sysctl_sz") added
  the array size to the ctl_table registration
* Remove the need for having __NF_SYSCTL_CT_LAST_SYSCTL as the
  sysctl array size is now in NF_SYSCTL_CT_LAST_SYSCTL
* Remove extra element in ctl_table arrays declarations

Acked-by: Kees Cook <keescook@chromium.org> # loadpin & yama
Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agonet: Remove ctl_table sentinel elements from several networking subsystems
Joel Granados [Wed, 1 May 2024 09:29:29 +0000 (11:29 +0200)]
net: Remove ctl_table sentinel elements from several networking subsystems

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

To avoid lots of small commits, this commit brings together network
changes from (as they appear in MAINTAINERS) LLC, MPTCP, NETROM NETWORK
LAYER, PHONET PROTOCOL, ROSE NETWORK LAYER, RXRPC SOCKETS, SCTP
PROTOCOL, SHARED MEMORY COMMUNICATIONS (SMC), TIPC NETWORK LAYER and
NETWORKING [IPSEC]

* Remove sentinel element from ctl_table structs.
* Replace empty array registration with the register_net_sysctl_sz call
  in llc_sysctl_init
* Replace the for loop stop condition that tests for procname == NULL
  with one that depends on array size in sctp_sysctl_net_register
* Remove instances where an array element is zeroed out to make it look
  like a sentinel in xfrm_sysctl_init. This is not longer needed and is
  safe after commit c899710fe7f9 ("networking: Update to
  register_net_sysctl_sz") added the array size to the ctl_table
  registration
* Use a table_size variable to keep the value of ARRAY_SIZE

Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agonet: sunrpc: Remove the now superfluous sentinel elements from ctl_table array
Joel Granados [Wed, 1 May 2024 09:29:28 +0000 (11:29 +0200)]
net: sunrpc: Remove the now superfluous sentinel elements from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

* Remove sentinel element from ctl_table structs.

Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agonet: rds: Remove the now superfluous sentinel elements from ctl_table array
Joel Granados [Wed, 1 May 2024 09:29:27 +0000 (11:29 +0200)]
net: rds: Remove the now superfluous sentinel elements from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

* Remove sentinel element from ctl_table structs.

Signed-off-by: Joel Granados <j.granados@samsung.com>
Acked-by: Allison Henderson <allison.henderson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agonet: ipv{6,4}: Remove the now superfluous sentinel elements from ctl_table array
Joel Granados [Wed, 1 May 2024 09:29:26 +0000 (11:29 +0200)]
net: ipv{6,4}: Remove the now superfluous sentinel elements from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

* Remove sentinel element from ctl_table structs.
* Remove the zeroing out of an array element (to make it look like a
  sentinel) in sysctl_route_net_init And ipv6_route_sysctl_init.
  This is not longer needed and is safe after commit c899710fe7f9
  ("networking: Update to register_net_sysctl_sz") added the array size
  to the ctl_table registration.
* Remove extra sentinel element in the declaration of devinet_vars.
* Removed the "-1" in __devinet_sysctl_register, sysctl_route_net_init,
  ipv6_sysctl_net_init and ipv4_sysctl_init_net that adjusted for having
  an extra empty element when looping over ctl_table arrays
* Replace the for loop stop condition in __addrconf_sysctl_register that
  tests for procname == NULL with one that depends on array size
* Removing the unprivileged user check in ipv6_route_sysctl_init is
  safe as it is replaced by calling ipv6_route_sysctl_table_size;
  introduced in commit c899710fe7f9 ("networking: Update to
  register_net_sysctl_sz")
* Use a table_size variable to keep the value of ARRAY_SIZE

Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agonet: Remove the now superfluous sentinel elements from ctl_table array
Joel Granados [Wed, 1 May 2024 09:29:25 +0000 (11:29 +0200)]
net: Remove the now superfluous sentinel elements from ctl_table array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/ZO5Yx5JFogGi%2FcBo@bombadil.infradead.org/)

* Remove sentinel element from ctl_table structs.
* Remove the zeroing out of an array element (to make it look like a
  sentinel) in neigh_sysctl_register and lowpan_frags_ns_sysctl_register
  This is not longer needed and is safe after commit c899710fe7f9
  ("networking: Update to register_net_sysctl_sz") added the array size
  to the ctl_table registration.
* Replace the for loop stop condition in sysctl_core_net_init that tests
  for procname == NULL with one that depends on array size
* Removed the "-1" in mpls_net_init that adjusted for having an extra
  empty element when looping over ctl_table arrays
* Use a table_size variable to keep the value of ARRAY_SIZE

Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agonet_sched: sch_sfq: annotate data-races around q->perturb_period
Eric Dumazet [Tue, 30 Apr 2024 18:00:15 +0000 (18:00 +0000)]
net_sched: sch_sfq: annotate data-races around q->perturb_period

sfq_perturbation() reads q->perturb_period locklessly.
Add annotations to fix potential issues.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240430180015.3111398-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agonet: dsa: mv88e6xxx: Correct check for empty list
Simon Horman [Tue, 30 Apr 2024 17:46:45 +0000 (18:46 +0100)]
net: dsa: mv88e6xxx: Correct check for empty list

Since commit a3c53be55c95 ("net: dsa: mv88e6xxx: Support multiple MDIO
busses") mv88e6xxx_default_mdio_bus() has checked that the
return value of list_first_entry() is non-NULL.

This appears to be intended to guard against the list chip->mdios being
empty.  However, it is not the correct check as the implementation of
list_first_entry is not designed to return NULL for empty lists.

Instead, use list_first_entry_or_null() which does return NULL if the
list is empty.

Flagged by Smatch.
Compile tested only.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240430-mv88e6xx-list_empty-v3-1-c35c69d88d2e@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoselftests/net: skip partial checksum packets in csum test
Willem de Bruijn [Wed, 1 May 2024 19:30:22 +0000 (15:30 -0400)]
selftests/net: skip partial checksum packets in csum test

Detect packets with ip_summed CHECKSUM_PARTIAL and skip these. These
should not exist, as the test sends individual packets between two
hosts. But if (HW) GRO is on, with randomized content sometimes
subsequent packets can be coalesced.

In this case the GSO packet checksum is converted to a pseudo checksum
in anticipation of sending out as TSO/USO. So the field will not match
the expected value.

Do not count these as test errors.

Signed-off-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20240501193156.3627344-1-willemdebruijn.kernel@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoselftests: net: py: check process exit code in bkg() and background cmd()
Jakub Kicinski [Thu, 2 May 2024 02:53:25 +0000 (19:53 -0700)]
selftests: net: py: check process exit code in bkg() and background cmd()

We're a bit too loose with error checking for background
processes. cmd() completely ignores the fail argument
passed to the constructor if background is True.
Default to checking for errors if process is not terminated
explicitly. Caller can override with True / False.

For bkg() the processing step is called magically by __exit__
so record the value passed in the constructor.

Reported-by: Willem de Bruijn <willemb@google.com>
Tested-by: Willem de Bruijn <willemb@google.com>
Link: https://lore.kernel.org/r/20240502025325.1924923-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoIB/hfi1: allocate dummy net_device dynamically
Breno Leitao [Tue, 30 Apr 2024 16:22:11 +0000 (09:22 -0700)]
IB/hfi1: allocate dummy net_device dynamically

Embedding net_device into structures prohibits the usage of flexible
arrays in the net_device structure. For more details, see the discussion
at [1].

Un-embed the net_device from struct hfi1_netdev_rx by converting it
into a pointer. Then use the leverage alloc_netdev() to allocate the
net_device object at hfi1_alloc_rx().

[1] https://lore.kernel.org/all/20240229225910.79e224cf@kernel.org/

Acked-by: Dennis Dalessandro <dennis.dalessandro@cornelisnetworks.com>
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Leon Romanovsky <leon@kernel.org>
Link: https://lore.kernel.org/r/20240430162213.746492-1-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agonet/mlx5e: flower: check for unsupported control flags
Asbjørn Sloth Tønnesen [Mon, 22 Apr 2024 15:27:27 +0000 (15:27 +0000)]
net/mlx5e: flower: check for unsupported control flags

Use flow_rule_is_supp_control_flags() to reject filters
with unsupported control flags.

In case any unsupported control flags are masked,
flow_rule_is_supp_control_flags() sets a NL extended
error message, and we return -EOPNOTSUPP.

Remove FLOW_DIS_FIRST_FRAG specific error message,
and treat it as any other unsupported control flag.

Only compile-tested.

Signed-off-by: Asbjørn Sloth Tønnesen <ast@fiberby.net>
Reviewed-by: Jianbo Liu <jianbol@nvidia.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Acked-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240422152728.175677-1-ast@fiberby.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Jakub Kicinski [Thu, 2 May 2024 19:05:13 +0000 (12:05 -0700)]
Merge git://git./linux/kernel/git/netdev/net

Cross-merge networking fixes after downstream PR.

Conflicts:

include/linux/filter.h
kernel/bpf/core.c
  66e13b615a0c ("bpf: verifier: prevent userspace memory access")
  d503a04f8bc0 ("bpf: Add support for certain atomics in bpf_arena to x86 JIT")
https://lore.kernel.org/all/20240429114939.210328b0@canb.auug.org.au/

No adjacent changes.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMerge tag 'net-6.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 2 May 2024 15:51:47 +0000 (08:51 -0700)]
Merge tag 'net-6.9-rc7' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Paolo Abeni:
 "Including fixes from bpf.

  Relatively calm week, likely due to public holiday in most places. No
  known outstanding regressions.

  Current release - regressions:

   - rxrpc: fix wrong alignmask in __page_frag_alloc_align()

   - eth: e1000e: change usleep_range to udelay in PHY mdic access

  Previous releases - regressions:

   - gro: fix udp bad offset in socket lookup

   - bpf: fix incorrect runtime stat for arm64

   - tipc: fix UAF in error path

   - netfs: fix a potential infinite loop in extract_user_to_sg()

   - eth: ice: ensure the copied buf is NUL terminated

   - eth: qeth: fix kernel panic after setting hsuid

  Previous releases - always broken:

   - bpf:
       - verifier: prevent userspace memory access
       - xdp: use flags field to disambiguate broadcast redirect

   - bridge: fix multicast-to-unicast with fraglist GSO

   - mptcp: ensure snd_nxt is properly initialized on connect

   - nsh: fix outer header access in nsh_gso_segment().

   - eth: bcmgenet: fix racing registers access

   - eth: vxlan: fix stats counters.

  Misc:

   - a bunch of MAINTAINERS file updates"

* tag 'net-6.9-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (45 commits)
  MAINTAINERS: mark MYRICOM MYRI-10G as Orphan
  MAINTAINERS: remove Ariel Elior
  net: gro: add flush check in udp_gro_receive_segment
  net: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to napi_gro_cb
  ipv4: Fix uninit-value access in __ip_make_skb()
  s390/qeth: Fix kernel panic after setting hsuid
  vxlan: Pull inner IP header in vxlan_rcv().
  tipc: fix a possible memleak in tipc_buf_append
  tipc: fix UAF in error path
  rxrpc: Clients must accept conn from any address
  net: core: reject skb_copy(_expand) for fraglist GSO skbs
  net: bridge: fix multicast-to-unicast with fraglist GSO
  mptcp: ensure snd_nxt is properly initialized on connect
  e1000e: change usleep_range to udelay in PHY mdic access
  net: dsa: mv88e6xxx: Fix number of databases for 88E6141 / 88E6341
  cxgb4: Properly lock TX queue for the selftest.
  rxrpc: Fix using alignmask being zero for __page_frag_alloc_align()
  vxlan: Add missing VNI filter counter update in arp_reduce().
  vxlan: Fix racy device stats updates.
  net: qede: use return from qede_parse_actions()
  ...

7 weeks agoMerge branch 'bnxt_en-updates-for-net-next'
Jakub Kicinski [Thu, 2 May 2024 14:27:23 +0000 (07:27 -0700)]
Merge branch 'bnxt_en-updates-for-net-next'

Michael Chan says:

====================
bnxt_en: Updates for net-next

The first patch converts the sw_stats field in the completion
ring structure to a pointer.  This allows the group of
completion rings using the same MSIX to share the same sw_stats
structure.  Prior to this, the correct completion ring must be
used to count packets.

The next four patches remove the RTNL lock when calling the RoCE
driver for asynchronous stop and start during error recovery and
firmware reset.  The RTNL ilock is replaced with a private mutex
used to synchronize RoCE register, unregister, stop, and start.

The last patch adds VF PCI IDs for the 5760X chips.

v2: Dropped patch #1 from v1.  Will work with David to get that
patch in separately.
====================

Link: https://lore.kernel.org/r/20240501003056.100607-1-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agobnxt_en: Add VF PCI ID for 5760X (P7) chips
Ajit Khaparde [Wed, 1 May 2024 00:30:56 +0000 (17:30 -0700)]
bnxt_en: Add VF PCI ID for 5760X (P7) chips

No driver logic changes are required to support the VFs, so just add
the VF PCI ID.

Reviewed-by: Selvin Thyparampil Xavier <selvin.xavier@broadcom.com>
Signed-off-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240501003056.100607-7-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agobnxt_en: Optimize recovery path ULP locking in the driver
Kalesh AP [Wed, 1 May 2024 00:30:55 +0000 (17:30 -0700)]
bnxt_en: Optimize recovery path ULP locking in the driver

In the error recovery path (AER, firmware recovery, etc), the
driver notifies the RoCE driver via ULP_STOP before the reset
and via ULP_START after the reset, all under RTNL_LOCK.  The
RoCE driver can take a long time if there are a lot of QPs to
destroy, so it is not ideal to hold the global RTNL lock.

Rely on the new en_dev_lock mutex instead for ULP_STOP and
ULP_START.  For the most part, we move the ULP_STOP call before
we take the RTNL lock and move the ULP_START after RTNL unlock.
Note that SRIOV re-enablement must be done after ULP_START
or RoCE on the VFs will not resume properly after reset.

The one scenario in bnxt_hwrm_if_change() where the RTNL lock
is already taken in the .ndo_open() context requires the ULP
restart to be deferred to the bnxt_sp_task() workqueue.

Reviewed-by: Selvin Thyparampil Xavier <selvin.xavier@broadcom.com>
Reviewed-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240501003056.100607-6-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agobnxt_en: Add a mutex to synchronize ULP operations
Kalesh AP [Wed, 1 May 2024 00:30:54 +0000 (17:30 -0700)]
bnxt_en: Add a mutex to synchronize ULP operations

The current scheme relies heavily on the RTNL lock for all ULP
operations between the L2 and the RoCE driver.  Add a new en_dev_lock
mutex so that the asynchronous ULP_STOP and ULP_START operations
can be serialized with bnxt_register_dev() and bnxt_unregister_dev()
calls without relying on the RTNL lock.  The next patch will remove
the RTNL lock from the ULP_STOP and ULP_START calls.

Reviewed-by: Selvin Thyparampil Xavier <selvin.xavier@broadcom.com>
Reviewed-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240501003056.100607-5-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agobnxt_en: Don't call ULP_STOP/ULP_START during L2 reset
Michael Chan [Wed, 1 May 2024 00:30:53 +0000 (17:30 -0700)]
bnxt_en: Don't call ULP_STOP/ULP_START during L2 reset

There is no need to call ULP_STOP and ULP_START before and after the
L2 reset in bnxt_reset_task().  This L2 reset is done after detecting
TX timeout, RX ring errors, or VF config changes.  The L2 reset does
not affect RoCE since the firmware is not reset and the backing store
is left alone.

Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240501003056.100607-4-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agobnxt_en: Don't support offline self test when RoCE driver is loaded
Kalesh AP [Wed, 1 May 2024 00:30:52 +0000 (17:30 -0700)]
bnxt_en: Don't support offline self test when RoCE driver is loaded

Offline self test is a very disruptive operation for RoCE and requires
all active QPs to be destroyed.  With a large number of QPs, it can
take a long time to destroy all the QPs and can timeout.  Do not allow
ethtool offline self test if the RoCE driver is registered on the
device.

Reviewed-by: Selvin Thyparampil Xavier <selvin.xavier@broadcom.com>
Reviewed-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240501003056.100607-3-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agobnxt_en: share NQ ring sw_stats memory with subrings
Edwin Peer [Wed, 1 May 2024 00:30:51 +0000 (17:30 -0700)]
bnxt_en: share NQ ring sw_stats memory with subrings

On P5_PLUS chips and later, the NQ rings have subrings for RX and TX
completions respectively. These subrings are passed to the poll
function instead of the base NQ, but each ring carries its own
copy of the software ring statistics.

For stats to be conveniently accessible in __bnxt_poll_work(), the
statistics memory should either be shared between the NQ and its
subrings or the subrings need to be included in the ethtool stats
aggregation logic. This patch opts for the former, because it's more
efficient and less confusing having the software statistics for a
ring exist in a single place.

Before this patch, the counter will not be displayed if the "wrong"
cpr->sw_stats was used to increment a counter.

Link: https://lore.kernel.org/netdev/CACKFLikEhVAJA+osD7UjQNotdGte+fth7zOy7yDdLkTyFk9Pyw@mail.gmail.com/
Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240501003056.100607-2-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next...
Jakub Kicinski [Thu, 2 May 2024 14:14:59 +0000 (07:14 -0700)]
Merge branch '40GbE' of git://git./linux/kernel/git/tnguy/next-queue

Tony Nguyen says:

====================
i40e: cleanups & refactors

Ivan Vecera says:

This series do following:
Patch 1 - Removes write-only flags field from i40e_veb structure and
          from i40e_veb_setup() parameters
Patch 2 - Refactors parameter of i40e_notify_client_of_l2_param_changes()
          and i40e_notify_client_of_netdev_close()
Patch 3 - Refactors parameter of i40e_detect_recover_hung()
Patch 4 - Adds helper i40e_pf_get_main_vsi() to get main VSI and uses it
          in existing code
Patch 5 - Consolidates checks whether given VSI is the main one
Patch 6 - Adds helper i40e_pf_get_main_veb() to get main VEB and uses it
          in existing code
Patch 7 - Adds helper i40e_vsi_reconfig_tc() to reconfigure TC for
          particular and uses it to replace existing open-coded pieces

* '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue:
  i40e: Add and use helper to reconfigure TC for given VSI
  i40e: Add helper to access main VEB
  i40e: Consolidate checks whether given VSI is main
  i40e: Add helper to access main VSI
  i40e: Refactor argument of i40e_detect_recover_hung()
  i40e: Refactor argument of several client notification functions
  i40e: Remove flags field from i40e_veb
====================

Link: https://lore.kernel.org/r/20240430180639.1938515-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agonet/sched: unregister lockdep keys in qdisc_create/qdisc_alloc error path
Davide Caratti [Tue, 30 Apr 2024 17:11:13 +0000 (19:11 +0200)]
net/sched: unregister lockdep keys in qdisc_create/qdisc_alloc error path

Naresh and Eric report several errors (corrupted elements in the dynamic
key hash list), when running tdc.py or syzbot. The error path of
qdisc_alloc() and qdisc_create() frees the qdisc memory, but it forgets
to unregister the lockdep key, thus causing use-after-free like the
following one:

 ==================================================================
 BUG: KASAN: slab-use-after-free in lockdep_register_key+0x5f2/0x700
 Read of size 8 at addr ffff88811236f2a8 by task ip/7925

 CPU: 26 PID: 7925 Comm: ip Kdump: loaded Not tainted 6.9.0-rc2+ #648
 Hardware name: Supermicro SYS-6027R-72RF/X9DRH-7TF/7F/iTF/iF, BIOS 3.0  07/26/2013
 Call Trace:
  <TASK>
  dump_stack_lvl+0x7c/0xc0
  print_report+0xc9/0x610
  kasan_report+0x89/0xc0
  lockdep_register_key+0x5f2/0x700
  qdisc_alloc+0x21d/0xb60
  qdisc_create_dflt+0x63/0x3c0
  attach_one_default_qdisc.constprop.37+0x8e/0x170
  dev_activate+0x4bd/0xc30
  __dev_open+0x275/0x380
  __dev_change_flags+0x3f1/0x570
  dev_change_flags+0x7c/0x160
  do_setlink+0x1ea1/0x34b0
  __rtnl_newlink+0x8c9/0x1510
  rtnl_newlink+0x61/0x90
  rtnetlink_rcv_msg+0x2f0/0xbc0
  netlink_rcv_skb+0x120/0x380
  netlink_unicast+0x420/0x630
  netlink_sendmsg+0x732/0xbc0
  __sock_sendmsg+0x1ea/0x280
  ____sys_sendmsg+0x5a9/0x990
  ___sys_sendmsg+0xf1/0x180
  __sys_sendmsg+0xd3/0x180
  do_syscall_64+0x96/0x180
  entry_SYSCALL_64_after_hwframe+0x71/0x79
 RIP: 0033:0x7f9503f4fa07
 Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
 RSP: 002b:00007fff6c729068 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
 RAX: ffffffffffffffda RBX: 000000006630c681 RCX: 00007f9503f4fa07
 RDX: 0000000000000000 RSI: 00007fff6c7290d0 RDI: 0000000000000003
 RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000078
 R10: 000000000000009b R11: 0000000000000246 R12: 0000000000000001
 R13: 00007fff6c729180 R14: 0000000000000000 R15: 000055bf67dd9040
  </TASK>

 Allocated by task 7745:
  kasan_save_stack+0x1c/0x40
  kasan_save_track+0x10/0x30
  __kasan_kmalloc+0x7b/0x90
  __kmalloc_node+0x1ff/0x460
  qdisc_alloc+0xae/0xb60
  qdisc_create+0xdd/0xfb0
  tc_modify_qdisc+0x37e/0x1960
  rtnetlink_rcv_msg+0x2f0/0xbc0
  netlink_rcv_skb+0x120/0x380
  netlink_unicast+0x420/0x630
  netlink_sendmsg+0x732/0xbc0
  __sock_sendmsg+0x1ea/0x280
  ____sys_sendmsg+0x5a9/0x990
  ___sys_sendmsg+0xf1/0x180
  __sys_sendmsg+0xd3/0x180
  do_syscall_64+0x96/0x180
  entry_SYSCALL_64_after_hwframe+0x71/0x79

 Freed by task 7745:
  kasan_save_stack+0x1c/0x40
  kasan_save_track+0x10/0x30
  kasan_save_free_info+0x36/0x60
  __kasan_slab_free+0xfe/0x180
  kfree+0x113/0x380
  qdisc_create+0xafb/0xfb0
  tc_modify_qdisc+0x37e/0x1960
  rtnetlink_rcv_msg+0x2f0/0xbc0
  netlink_rcv_skb+0x120/0x380
  netlink_unicast+0x420/0x630
  netlink_sendmsg+0x732/0xbc0
  __sock_sendmsg+0x1ea/0x280
  ____sys_sendmsg+0x5a9/0x990
  ___sys_sendmsg+0xf1/0x180
  __sys_sendmsg+0xd3/0x180
  do_syscall_64+0x96/0x180
  entry_SYSCALL_64_after_hwframe+0x71/0x79

Fix this ensuring that lockdep_unregister_key() is called before the
qdisc struct is freed, also in the error path of qdisc_create() and
qdisc_alloc().

Fixes: af0cb3fa3f9e ("net/sched: fix false lockdep warning on qdisc root lock")
Reported-by: Linux Kernel Functional Testing <lkft@linaro.org>
Closes: https://lore.kernel.org/netdev/20240429221706.1492418-1-naresh.kamboju@linaro.org/
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Tested-by: Ido Schimmel <idosch@nvidia.com>
Link: https://lore.kernel.org/r/2aa1ca0c0a3aa0acc15925c666c777a4b5de553c.1714496886.git.dcaratti@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMAINTAINERS: mark MYRICOM MYRI-10G as Orphan
Jakub Kicinski [Tue, 30 Apr 2024 23:35:32 +0000 (16:35 -0700)]
MAINTAINERS: mark MYRICOM MYRI-10G as Orphan

Chris's email address bounces and lore hasn't seen an email
from anyone with his name for almost a decade.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240430233532.1356982-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agoMAINTAINERS: remove Ariel Elior
Jakub Kicinski [Tue, 30 Apr 2024 23:33:05 +0000 (16:33 -0700)]
MAINTAINERS: remove Ariel Elior

aelior@marvell.com bounces, we haven't seen Ariel on lore
since March 2022.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Link: https://lore.kernel.org/r/20240430233305.1356105-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agoMerge branch 'net-gro-add-flush-flush_id-checks-and-fix-wrong-offset-in-udp'
Paolo Abeni [Thu, 2 May 2024 09:03:21 +0000 (11:03 +0200)]
Merge branch 'net-gro-add-flush-flush_id-checks-and-fix-wrong-offset-in-udp'

Richard Gobert says:

====================
net: gro: add flush/flush_id checks and fix wrong offset in udp

This series fixes a bug in the complete phase of UDP in GRO, in which
socket lookup fails due to using network_header when parsing encapsulated
packets. The fix is to add network_offset and inner_network_offset to
napi_gro_cb and use these offsets for socket lookup.

In addition p->flush/flush_id should be checked in all UDP flows. The
same logic from tcp_gro_receive is applied for all flows in
udp_gro_receive_segment. This prevents packets with mismatching network
headers (flush/flush_id turned on) from merging in UDP GRO.

The original series includes a change to vxlan test which adds the local
parameter to prevent similar future bugs. I plan to submit it separately to
net-next.

This series is part of a previously submitted series to net-next:
https://lore.kernel.org/all/20240408141720.98832-1-richardbgobert@gmail.com/

v3 -> v4:
 - Store network offsets, and use them only in udp_gro_complete flows
 - Correct commit hash used in Fixes tag
 - v3:
 https://lore.kernel.org/netdev/20240424163045.123528-1-richardbgobert@gmail.com/

v2 -> v3:
 - Add network_offsets and fix udp bug in a single commit to make backporting easier
 - Write to inner_network_offset in {inet,ipv6}_gro_receive
 - Use network_offsets union in tcp[46]_gro_complete as well
 - v2:
 https://lore.kernel.org/netdev/20240419153542.121087-1-richardbgobert@gmail.com/

v1 -> v2:
 - Use network_offsets instead of p_poff param as suggested by Willem
 - Check flush before postpull, and for all UDP GRO flows
 - v1:
 https://lore.kernel.org/netdev/20240412152120.115067-1-richardbgobert@gmail.com/
====================

Link: https://lore.kernel.org/r/20240430143555.126083-1-richardbgobert@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: gro: add flush check in udp_gro_receive_segment
Richard Gobert [Tue, 30 Apr 2024 14:35:55 +0000 (16:35 +0200)]
net: gro: add flush check in udp_gro_receive_segment

GRO-GSO path is supposed to be transparent and as such L3 flush checks are
relevant to all UDP flows merging in GRO. This patch uses the same logic
and code from tcp_gro_receive, terminating merge if flush is non zero.

Fixes: e20cf8d3f1f7 ("udp: implement GRO for plain UDP sockets.")
Signed-off-by: Richard Gobert <richardbgobert@gmail.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agonet: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to...
Richard Gobert [Tue, 30 Apr 2024 14:35:54 +0000 (16:35 +0200)]
net: gro: fix udp bad offset in socket lookup by adding {inner_}network_offset to napi_gro_cb

Commits a602456 ("udp: Add GRO functions to UDP socket") and 57c67ff ("udp:
additional GRO support") introduce incorrect usage of {ip,ipv6}_hdr in the
complete phase of gro. The functions always return skb->network_header,
which in the case of encapsulated packets at the gro complete phase, is
always set to the innermost L3 of the packet. That means that calling
{ip,ipv6}_hdr for skbs which completed the GRO receive phase (both in
gro_list and *_gro_complete) when parsing an encapsulated packet's _outer_
L3/L4 may return an unexpected value.

This incorrect usage leads to a bug in GRO's UDP socket lookup.
udp{4,6}_lib_lookup_skb functions use ip_hdr/ipv6_hdr respectively. These
*_hdr functions return network_header which will point to the innermost L3,
resulting in the wrong offset being used in __udp{4,6}_lib_lookup with
encapsulated packets.

This patch adds network_offset and inner_network_offset to napi_gro_cb, and
makes sure both are set correctly.

To fix the issue, network_offsets union is used inside napi_gro_cb, in
which both the outer and the inner network offsets are saved.

Reproduction example:

Endpoint configuration example (fou + local address bind)

    # ip fou add port 6666 ipproto 4
    # ip link add name tun1 type ipip remote 2.2.2.1 local 2.2.2.2 encap fou encap-dport 5555 encap-sport 6666 mode ipip
    # ip link set tun1 up
    # ip a add 1.1.1.2/24 dev tun1

Netperf TCP_STREAM result on net-next before patch is applied:

net-next main, GRO enabled:
    $ netperf -H 1.1.1.2 -t TCP_STREAM -l 5
    Recv   Send    Send
    Socket Socket  Message  Elapsed
    Size   Size    Size     Time     Throughput
    bytes  bytes   bytes    secs.    10^6bits/sec

    131072  16384  16384    5.28        2.37

net-next main, GRO disabled:
    $ netperf -H 1.1.1.2 -t TCP_STREAM -l 5
    Recv   Send    Send
    Socket Socket  Message  Elapsed
    Size   Size    Size     Time     Throughput
    bytes  bytes   bytes    secs.    10^6bits/sec

    131072  16384  16384    5.01     2745.06

patch applied, GRO enabled:
    $ netperf -H 1.1.1.2 -t TCP_STREAM -l 5
    Recv   Send    Send
    Socket Socket  Message  Elapsed
    Size   Size    Size     Time     Throughput
    bytes  bytes   bytes    secs.    10^6bits/sec

    131072  16384  16384    5.01     2877.38

Fixes: a6024562ffd7 ("udp: Add GRO functions to UDP socket")
Signed-off-by: Richard Gobert <richardbgobert@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agoipv4: Fix uninit-value access in __ip_make_skb()
Shigeru Yoshida [Tue, 30 Apr 2024 12:39:45 +0000 (21:39 +0900)]
ipv4: Fix uninit-value access in __ip_make_skb()

KMSAN reported uninit-value access in __ip_make_skb() [1].  __ip_make_skb()
tests HDRINCL to know if the skb has icmphdr. However, HDRINCL can cause a
race condition. If calling setsockopt(2) with IP_HDRINCL changes HDRINCL
while __ip_make_skb() is running, the function will access icmphdr in the
skb even if it is not included. This causes the issue reported by KMSAN.

Check FLOWI_FLAG_KNOWN_NH on fl4->flowi4_flags instead of testing HDRINCL
on the socket.

Also, fl4->fl4_icmp_type and fl4->fl4_icmp_code are not initialized. These
are union in struct flowi4 and are implicitly initialized by
flowi4_init_output(), but we should not rely on specific union layout.

Initialize these explicitly in raw_sendmsg().

[1]
BUG: KMSAN: uninit-value in __ip_make_skb+0x2b74/0x2d20 net/ipv4/ip_output.c:1481
 __ip_make_skb+0x2b74/0x2d20 net/ipv4/ip_output.c:1481
 ip_finish_skb include/net/ip.h:243 [inline]
 ip_push_pending_frames+0x4c/0x5c0 net/ipv4/ip_output.c:1508
 raw_sendmsg+0x2381/0x2690 net/ipv4/raw.c:654
 inet_sendmsg+0x27b/0x2a0 net/ipv4/af_inet.c:851
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x274/0x3c0 net/socket.c:745
 __sys_sendto+0x62c/0x7b0 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0x130/0x200 net/socket.c:2199
 do_syscall_64+0xd8/0x1f0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Uninit was created at:
 slab_post_alloc_hook mm/slub.c:3804 [inline]
 slab_alloc_node mm/slub.c:3845 [inline]
 kmem_cache_alloc_node+0x5f6/0xc50 mm/slub.c:3888
 kmalloc_reserve+0x13c/0x4a0 net/core/skbuff.c:577
 __alloc_skb+0x35a/0x7c0 net/core/skbuff.c:668
 alloc_skb include/linux/skbuff.h:1318 [inline]
 __ip_append_data+0x49ab/0x68c0 net/ipv4/ip_output.c:1128
 ip_append_data+0x1e7/0x260 net/ipv4/ip_output.c:1365
 raw_sendmsg+0x22b1/0x2690 net/ipv4/raw.c:648
 inet_sendmsg+0x27b/0x2a0 net/ipv4/af_inet.c:851
 sock_sendmsg_nosec net/socket.c:730 [inline]
 __sock_sendmsg+0x274/0x3c0 net/socket.c:745
 __sys_sendto+0x62c/0x7b0 net/socket.c:2191
 __do_sys_sendto net/socket.c:2203 [inline]
 __se_sys_sendto net/socket.c:2199 [inline]
 __x64_sys_sendto+0x130/0x200 net/socket.c:2199
 do_syscall_64+0xd8/0x1f0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

CPU: 1 PID: 15709 Comm: syz-executor.7 Not tainted 6.8.0-11567-gb3603fcb79b1 #25
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014

Fixes: 99e5acae193e ("ipv4: Fix potential uninit variable access bug in __ip_make_skb()")
Reported-by: syzkaller <syzkaller@googlegroups.com>
Signed-off-by: Shigeru Yoshida <syoshida@redhat.com>
Link: https://lore.kernel.org/r/20240430123945.2057348-1-syoshida@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agoMerge remote branch 'xfrm: Introduce direction attribute for SA'
Steffen Klassert [Thu, 2 May 2024 08:05:11 +0000 (10:05 +0200)]
Merge remote branch 'xfrm: Introduce direction attribute for SA'

Antony Antony says:

====================
Inspired by the upcoming IP-TFS patch set, and confusions experienced in
the past due to lack of direction attribute on SAs, add a new direction
"dir" attribute. It aims to streamline the SA configuration process and
enhance the clarity of existing SA attributes.

This patch set introduces the 'dir' attribute to SA, aka xfrm_state,
('in' for input or 'out' for output). Alsp add validations of existing
direction-specific SA attributes during configuration and in the data
path lookup.

This change would not affect any existing use case or way of configuring
SA. You will notice improvements when the new 'dir' attribute is set.
====================

Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
7 weeks agos390/qeth: Fix kernel panic after setting hsuid
Alexandra Winter [Tue, 30 Apr 2024 09:10:04 +0000 (11:10 +0200)]
s390/qeth: Fix kernel panic after setting hsuid

Symptom:
When the hsuid attribute is set for the first time on an IQD Layer3
device while the corresponding network interface is already UP,
the kernel will try to execute a napi function pointer that is NULL.

Example:
---------------------------------------------------------------------------
[ 2057.572696] illegal operation: 0001 ilc:1 [#1] SMP
[ 2057.572702] Modules linked in: af_iucv qeth_l3 zfcp scsi_transport_fc sunrpc nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6
nft_reject nft_ct nf_tables_set nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables libcrc32c nfnetlink ghash_s390 prng xts aes_s390 des_s390 de
s_generic sha3_512_s390 sha3_256_s390 sha512_s390 vfio_ccw vfio_mdev mdev vfio_iommu_type1 eadm_sch vfio ext4 mbcache jbd2 qeth_l2 bridge stp llc dasd_eckd_mod qeth dasd_mod
 qdio ccwgroup pkey zcrypt
[ 2057.572739] CPU: 6 PID: 60182 Comm: stress_client Kdump: loaded Not tainted 4.18.0-541.el8.s390x #1
[ 2057.572742] Hardware name: IBM 3931 A01 704 (LPAR)
[ 2057.572744] Krnl PSW : 0704f00180000000 0000000000000002 (0x2)
[ 2057.572748]            R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:3 PM:0 RI:0 EA:3
[ 2057.572751] Krnl GPRS: 0000000000000004 0000000000000000 00000000a3b008d8 0000000000000000
[ 2057.572754]            00000000a3b008d8 cb923a29c779abc5 0000000000000000 00000000814cfd80
[ 2057.572756]            000000000000012c 0000000000000000 00000000a3b008d8 00000000a3b008d8
[ 2057.572758]            00000000bab6d500 00000000814cfd80 0000000091317e46 00000000814cfc68
[ 2057.572762] Krnl Code:#0000000000000000: 0000                illegal
                         >0000000000000002: 0000                illegal
                          0000000000000004: 0000                illegal
                          0000000000000006: 0000                illegal
                          0000000000000008: 0000                illegal
                          000000000000000a: 0000                illegal
                          000000000000000c: 0000                illegal
                          000000000000000e: 0000                illegal
[ 2057.572800] Call Trace:
[ 2057.572801] ([<00000000ec639700>] 0xec639700)
[ 2057.572803]  [<00000000913183e2>] net_rx_action+0x2ba/0x398
[ 2057.572809]  [<0000000091515f76>] __do_softirq+0x11e/0x3a0
[ 2057.572813]  [<0000000090ce160c>] do_softirq_own_stack+0x3c/0x58
[ 2057.572817] ([<0000000090d2cbd6>] do_softirq.part.1+0x56/0x60)
[ 2057.572822]  [<0000000090d2cc60>] __local_bh_enable_ip+0x80/0x98
[ 2057.572825]  [<0000000091314706>] __dev_queue_xmit+0x2be/0xd70
[ 2057.572827]  [<000003ff803dd6d6>] afiucv_hs_send+0x24e/0x300 [af_iucv]
[ 2057.572830]  [<000003ff803dd88a>] iucv_send_ctrl+0x102/0x138 [af_iucv]
[ 2057.572833]  [<000003ff803de72a>] iucv_sock_connect+0x37a/0x468 [af_iucv]
[ 2057.572835]  [<00000000912e7e90>] __sys_connect+0xa0/0xd8
[ 2057.572839]  [<00000000912e9580>] sys_socketcall+0x228/0x348
[ 2057.572841]  [<0000000091514e1a>] system_call+0x2a6/0x2c8
[ 2057.572843] Last Breaking-Event-Address:
[ 2057.572844]  [<0000000091317e44>] __napi_poll+0x4c/0x1d8
[ 2057.572846]
[ 2057.572847] Kernel panic - not syncing: Fatal exception in interrupt
-------------------------------------------------------------------------------------------

Analysis:
There is one napi structure per out_q: card->qdio.out_qs[i].napi
The napi.poll functions are set during qeth_open().

Since
commit 1cfef80d4c2b ("s390/qeth: Don't call dev_close/dev_open (DOWN/UP)")
qeth_set_offline()/qeth_set_online() no longer call dev_close()/
dev_open(). So if qeth_free_qdio_queues() cleared
card->qdio.out_qs[i].napi.poll while the network interface was UP and the
card was offline, they are not set again.

Reproduction:
chzdev -e $devno layer2=0
ip link set dev $network_interface up
echo 0 > /sys/bus/ccwgroup/devices/0.0.$devno/online
echo foo > /sys/bus/ccwgroup/devices/0.0.$devno/hsuid
echo 1 > /sys/bus/ccwgroup/devices/0.0.$devno/online
-> Crash (can be enforced e.g. by af_iucv connect(), ip link down/up, ...)

Note that a Completion Queue (CQ) is only enabled or disabled, when hsuid
is set for the first time or when it is removed.

Workarounds:
- Set hsuid before setting the device online for the first time
or
- Use chzdev -d $devno; chzdev $devno hsuid=xxx; chzdev -e $devno;
to set hsuid on an existing device. (this will remove and recreate the
network interface)

Fix:
There is no need to free the output queues when a completion queue is
added or removed.
card->qdio.state now indicates whether the inbound buffer pool and the
outbound queues are allocated.
card->qdio.c_q indicates whether a CQ is allocated.

Fixes: 1cfef80d4c2b ("s390/qeth: Don't call dev_close/dev_open (DOWN/UP)")
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240430091004.2265683-1-wintera@linux.ibm.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
7 weeks agovxlan: Pull inner IP header in vxlan_rcv().
Guillaume Nault [Tue, 30 Apr 2024 16:50:13 +0000 (18:50 +0200)]
vxlan: Pull inner IP header in vxlan_rcv().

Ensure the inner IP header is part of skb's linear data before reading
its ECN bits. Otherwise we might read garbage.
One symptom is the system erroneously logging errors like
"vxlan: non-ECT from xxx.xxx.xxx.xxx with TOS=xxxx".

Similar bugs have been fixed in geneve, ip_tunnel and ip6_tunnel (see
commit 1ca1ba465e55 ("geneve: make sure to pull inner header in
geneve_rx()") for example). So let's reuse the same code structure for
consistency. Maybe we'll can add a common helper in the future.

Fixes: d342894c5d2f ("vxlan: virtual extensible lan")
Signed-off-by: Guillaume Nault <gnault@redhat.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://lore.kernel.org/r/1239c8db54efec341dd6455c77e0380f58923a3c.1714495737.git.gnault@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMerge branch 'net-dsa-adjust_link-removal'
Jakub Kicinski [Thu, 2 May 2024 02:06:34 +0000 (19:06 -0700)]
Merge branch 'net-dsa-adjust_link-removal'

Florian Fainelli says:

====================
net: dsa: adjust_link removal

Now that the last in-tree driver (b53) has been converted to PHYLINK, we
can get rid of all of code that catered to working with drivers
implementing only PHYLIB's adjust_link callback.
====================

Link: https://lore.kernel.org/r/20240430164816.2400606-1-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agonet: dsa: Remove adjust_link paths
Florian Fainelli [Tue, 30 Apr 2024 16:48:16 +0000 (09:48 -0700)]
net: dsa: Remove adjust_link paths

Now that we no longer any drivers using PHYLIB's adjust_link callback,
remove all paths that made use of adjust_link as well as the associated
functions.

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20240430164816.2400606-3-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agonet: dsa: Remove fixed_link_update member
Florian Fainelli [Tue, 30 Apr 2024 16:48:15 +0000 (09:48 -0700)]
net: dsa: Remove fixed_link_update member

We have not had a switch driver use a fixed_link_update callback since
58d56fcc3964f9be0a9ca42fd126bcd9dc7afc90 ("net: dsa: bcm_sf2: Get rid of
PHYLIB functions") remove this callback.

Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/20240430164816.2400606-2-florian.fainelli@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agotipc: fix a possible memleak in tipc_buf_append
Xin Long [Tue, 30 Apr 2024 14:03:38 +0000 (10:03 -0400)]
tipc: fix a possible memleak in tipc_buf_append

__skb_linearize() doesn't free the skb when it fails, so move
'*buf = NULL' after __skb_linearize(), so that the skb can be
freed on the err path.

Fixes: b7df21cf1b79 ("tipc: skb_linearize the head skb when reassembling msgs")
Reported-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Tung Nguyen <tung.q.nguyen@dektech.com.au>
Link: https://lore.kernel.org/r/90710748c29a1521efac4f75ea01b3b7e61414cf.1714485818.git.lucien.xin@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agotipc: fix UAF in error path
Paolo Abeni [Tue, 30 Apr 2024 13:53:37 +0000 (15:53 +0200)]
tipc: fix UAF in error path

Sam Page (sam4k) working with Trend Micro Zero Day Initiative reported
a UAF in the tipc_buf_append() error path:

BUG: KASAN: slab-use-after-free in kfree_skb_list_reason+0x47e/0x4c0
linux/net/core/skbuff.c:1183
Read of size 8 at addr ffff88804d2a7c80 by task poc/8034

CPU: 1 PID: 8034 Comm: poc Not tainted 6.8.2 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.16.0-debian-1.16.0-5 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack linux/lib/dump_stack.c:88
 dump_stack_lvl+0xd9/0x1b0 linux/lib/dump_stack.c:106
 print_address_description linux/mm/kasan/report.c:377
 print_report+0xc4/0x620 linux/mm/kasan/report.c:488
 kasan_report+0xda/0x110 linux/mm/kasan/report.c:601
 kfree_skb_list_reason+0x47e/0x4c0 linux/net/core/skbuff.c:1183
 skb_release_data+0x5af/0x880 linux/net/core/skbuff.c:1026
 skb_release_all linux/net/core/skbuff.c:1094
 __kfree_skb linux/net/core/skbuff.c:1108
 kfree_skb_reason+0x12d/0x210 linux/net/core/skbuff.c:1144
 kfree_skb linux/./include/linux/skbuff.h:1244
 tipc_buf_append+0x425/0xb50 linux/net/tipc/msg.c:186
 tipc_link_input+0x224/0x7c0 linux/net/tipc/link.c:1324
 tipc_link_rcv+0x76e/0x2d70 linux/net/tipc/link.c:1824
 tipc_rcv+0x45f/0x10f0 linux/net/tipc/node.c:2159
 tipc_udp_recv+0x73b/0x8f0 linux/net/tipc/udp_media.c:390
 udp_queue_rcv_one_skb+0xad2/0x1850 linux/net/ipv4/udp.c:2108
 udp_queue_rcv_skb+0x131/0xb00 linux/net/ipv4/udp.c:2186
 udp_unicast_rcv_skb+0x165/0x3b0 linux/net/ipv4/udp.c:2346
 __udp4_lib_rcv+0x2594/0x3400 linux/net/ipv4/udp.c:2422
 ip_protocol_deliver_rcu+0x30c/0x4e0 linux/net/ipv4/ip_input.c:205
 ip_local_deliver_finish+0x2e4/0x520 linux/net/ipv4/ip_input.c:233
 NF_HOOK linux/./include/linux/netfilter.h:314
 NF_HOOK linux/./include/linux/netfilter.h:308
 ip_local_deliver+0x18e/0x1f0 linux/net/ipv4/ip_input.c:254
 dst_input linux/./include/net/dst.h:461
 ip_rcv_finish linux/net/ipv4/ip_input.c:449
 NF_HOOK linux/./include/linux/netfilter.h:314
 NF_HOOK linux/./include/linux/netfilter.h:308
 ip_rcv+0x2c5/0x5d0 linux/net/ipv4/ip_input.c:569
 __netif_receive_skb_one_core+0x199/0x1e0 linux/net/core/dev.c:5534
 __netif_receive_skb+0x1f/0x1c0 linux/net/core/dev.c:5648
 process_backlog+0x101/0x6b0 linux/net/core/dev.c:5976
 __napi_poll.constprop.0+0xba/0x550 linux/net/core/dev.c:6576
 napi_poll linux/net/core/dev.c:6645
 net_rx_action+0x95a/0xe90 linux/net/core/dev.c:6781
 __do_softirq+0x21f/0x8e7 linux/kernel/softirq.c:553
 do_softirq linux/kernel/softirq.c:454
 do_softirq+0xb2/0xf0 linux/kernel/softirq.c:441
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x120 linux/kernel/softirq.c:381
 local_bh_enable linux/./include/linux/bottom_half.h:33
 rcu_read_unlock_bh linux/./include/linux/rcupdate.h:851
 __dev_queue_xmit+0x871/0x3ee0 linux/net/core/dev.c:4378
 dev_queue_xmit linux/./include/linux/netdevice.h:3169
 neigh_hh_output linux/./include/net/neighbour.h:526
 neigh_output linux/./include/net/neighbour.h:540
 ip_finish_output2+0x169f/0x2550 linux/net/ipv4/ip_output.c:235
 __ip_finish_output linux/net/ipv4/ip_output.c:313
 __ip_finish_output+0x49e/0x950 linux/net/ipv4/ip_output.c:295
 ip_finish_output+0x31/0x310 linux/net/ipv4/ip_output.c:323
 NF_HOOK_COND linux/./include/linux/netfilter.h:303
 ip_output+0x13b/0x2a0 linux/net/ipv4/ip_output.c:433
 dst_output linux/./include/net/dst.h:451
 ip_local_out linux/net/ipv4/ip_output.c:129
 ip_send_skb+0x3e5/0x560 linux/net/ipv4/ip_output.c:1492
 udp_send_skb+0x73f/0x1530 linux/net/ipv4/udp.c:963
 udp_sendmsg+0x1a36/0x2b40 linux/net/ipv4/udp.c:1250
 inet_sendmsg+0x105/0x140 linux/net/ipv4/af_inet.c:850
 sock_sendmsg_nosec linux/net/socket.c:730
 __sock_sendmsg linux/net/socket.c:745
 __sys_sendto+0x42c/0x4e0 linux/net/socket.c:2191
 __do_sys_sendto linux/net/socket.c:2203
 __se_sys_sendto linux/net/socket.c:2199
 __x64_sys_sendto+0xe0/0x1c0 linux/net/socket.c:2199
 do_syscall_x64 linux/arch/x86/entry/common.c:52
 do_syscall_64+0xd8/0x270 linux/arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x6f/0x77 linux/arch/x86/entry/entry_64.S:120
RIP: 0033:0x7f3434974f29
Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48
89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d
01 f0 ff ff 73 01 c3 48 8b 0d 37 8f 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007fff9154f2b8 EFLAGS: 00000212 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3434974f29
RDX: 00000000000032c8 RSI: 00007fff9154f300 RDI: 0000000000000003
RBP: 00007fff915532e0 R08: 00007fff91553360 R09: 0000000000000010
R10: 0000000000000000 R11: 0000000000000212 R12: 000055ed86d261d0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

In the critical scenario, either the relevant skb is freed or its
ownership is transferred into a frag_lists. In both cases, the cleanup
code must not free it again: we need to clear the skb reference earlier.

Fixes: 1149557d64c9 ("tipc: eliminate unnecessary linearization of incoming buffers")
Cc: stable@vger.kernel.org
Reported-by: zdi-disclosures@trendmicro.com # ZDI-CAN-23852
Acked-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/752f1ccf762223d109845365d07f55414058e5a3.1714484273.git.pabeni@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agonet: ti: icssg_prueth: Add SW TX / RX Coalescing based on hrtimers
MD Danish Anwar [Tue, 30 Apr 2024 12:06:34 +0000 (17:36 +0530)]
net: ti: icssg_prueth: Add SW TX / RX Coalescing based on hrtimers

Add SW IRQ coalescing based on hrtimers for RX and TX data path for ICSSG
driver, which can be enabled by ethtool commands:

- RX coalescing
  ethtool -C eth1 rx-usecs 50

- TX coalescing can be enabled per TX queue

  - by default enables coalescing for TX0
  ethtool -C eth1 tx-usecs 50
  - configure TX0
  ethtool -Q eth0 queue_mask 1 --coalesce tx-usecs 100
  - configure TX1
  ethtool -Q eth0 queue_mask 2 --coalesce tx-usecs 100
  - configure TX0 and TX1
  ethtool -Q eth0 queue_mask 3 --coalesce tx-usecs 100 --coalesce
tx-usecs 100

Minimum value for both rx-usecs and tx-usecs is 20us.

Compared to gro_flush_timeout and napi_defer_hard_irqs this patch allows
to enable IRQ coalescing for RX path separately.

Benchmarking numbers:
 ===============================================================
| Method                  | Tput_TX | CPU_TX | Tput_RX | CPU_RX |
| ==============================================================
| Default Driver           943 Mbps    31%      517 Mbps  38%   |
| IRQ Coalescing (Patch)   943 Mbps    28%      518 Mbps  25%   |
 ===============================================================

Signed-off-by: MD Danish Anwar <danishanwar@ti.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240430120634.1558998-1-danishanwar@ti.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMerge branch 'arp-random-clean-up-and-rcu-conversion-for-ioctl-siocgarp'
Jakub Kicinski [Thu, 2 May 2024 01:37:17 +0000 (18:37 -0700)]
Merge branch 'arp-random-clean-up-and-rcu-conversion-for-ioctl-siocgarp'

Kuniyuki Iwashima says:

====================
arp: Random clean up and RCU conversion for ioctl(SIOCGARP).

arp_ioctl() holds rtnl_lock() regardless of cmd (SIOCDARP, SIOCSARP,
and SIOCGARP) to get net_device by __dev_get_by_name() and copy
dev->name safely.

In the SIOCGARP path, arp_req_get() calls neigh_lookup(), which looks
up a neighbour entry under RCU.

This series cleans up ioctl() code a bit and extends the RCU section
not to take rtnl_lock() and instead use dev_get_by_name_rcu() and
netdev_copy_name() for SIOCGARP.

v2: https://lore.kernel.org/netdev/20240425170002.68160-1-kuniyu@amazon.com/
v1: https://lore.kernel.org/netdev/20240422194755.4221-1-kuniyu@amazon.com/
====================

Link: https://lore.kernel.org/r/20240430015813.71143-1-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoarp: Convert ioctl(SIOCGARP) to RCU.
Kuniyuki Iwashima [Tue, 30 Apr 2024 01:58:13 +0000 (18:58 -0700)]
arp: Convert ioctl(SIOCGARP) to RCU.

ioctl(SIOCGARP) holds rtnl_lock() to get netdev by __dev_get_by_name()
and copy dev->name safely and calls neigh_lookup() later, which looks
up a neighbour entry under RCU.

Let's replace __dev_get_by_name() with dev_get_by_name_rcu() and strscpy()
with netdev_copy_name() to avoid locking rtnl_lock().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20240430015813.71143-8-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agonet: Protect dev->name by seqlock.
Kuniyuki Iwashima [Tue, 30 Apr 2024 01:58:12 +0000 (18:58 -0700)]
net: Protect dev->name by seqlock.

We will convert ioctl(SIOCGARP) to RCU, and then we need to copy
dev->name which is currently protected by rtnl_lock().

This patch does the following:

  1) Add seqlock netdev_rename_lock to protect dev->name

  2) Add netdev_copy_name() that copies dev->name to buffer
     under netdev_rename_lock

  3) Use netdev_copy_name() in netdev_get_name() and drop
     devnet_rename_sem

Suggested-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/netdev/CANn89iJEWs7AYSJqGCUABeVqOCTkErponfZdT5kV-iD=-SajnQ@mail.gmail.com/
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20240430015813.71143-7-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoarp: Get dev after calling arp_req_(delete|set|get)().
Kuniyuki Iwashima [Tue, 30 Apr 2024 01:58:11 +0000 (18:58 -0700)]
arp: Get dev after calling arp_req_(delete|set|get)().

arp_ioctl() holds rtnl_lock() first regardless of cmd (SIOCDARP,
SIOCSARP, and SIOCGARP) to get net_device by __dev_get_by_name()
and copy dev->name safely.

In the SIOCGARP path, arp_req_get() calls neigh_lookup(), which
looks up a neighbour entry under RCU.

We will extend the RCU section not to take rtnl_lock() and instead
use dev_get_by_name_rcu() for SIOCGARP.

As a preparation, let's move __dev_get_by_name() into another
function and call it from arp_req_delete(), arp_req_set(), and
arp_req_get().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20240430015813.71143-6-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoarp: Remove a nest in arp_req_get().
Kuniyuki Iwashima [Tue, 30 Apr 2024 01:58:10 +0000 (18:58 -0700)]
arp: Remove a nest in arp_req_get().

This is a prep patch to make the following changes tidy.

No functional change intended.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20240430015813.71143-5-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoarp: Factorise ip_route_output() call in arp_req_set() and arp_req_delete().
Kuniyuki Iwashima [Tue, 30 Apr 2024 01:58:09 +0000 (18:58 -0700)]
arp: Factorise ip_route_output() call in arp_req_set() and arp_req_delete().

When ioctl(SIOCDARP/SIOCSARP) is issued for non-proxy entry (no ATF_COM)
without arpreq.arp_dev[] set, arp_req_set() and arp_req_delete() looks up
dev based on IPv4 address by ip_route_output().

Let's factorise the same code as arp_req_dev().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20240430015813.71143-4-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoarp: Validate netmask earlier for SIOCDARP and SIOCSARP in arp_ioctl().
Kuniyuki Iwashima [Tue, 30 Apr 2024 01:58:08 +0000 (18:58 -0700)]
arp: Validate netmask earlier for SIOCDARP and SIOCSARP in arp_ioctl().

When ioctl(SIOCDARP/SIOCSARP) is issued with ATF_PUBL, r.arp_netmask
must be 0.0.0.0 or 255.255.255.255.

Currently, the netmask is validated in arp_req_delete_public() or
arp_req_set_public() under rtnl_lock().

We have ATF_NETMASK test in arp_ioctl() before holding rtnl_lock(),
so let's move the netmask validation there.

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20240430015813.71143-3-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoarp: Move ATF_COM setting in arp_req_set().
Kuniyuki Iwashima [Tue, 30 Apr 2024 01:58:07 +0000 (18:58 -0700)]
arp: Move ATF_COM setting in arp_req_set().

In arp_req_set(), if ATF_PERM is set in arpreq.arp_flags,
ATF_COM is set automatically.

The flag will be used later for neigh_update() only when
a neighbour entry is found.

Let's set ATF_COM just before calling neigh_update().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20240430015813.71143-2-kuniyu@amazon.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoselftests: netfilter: nft_concat_range.sh: reduce debug kernel run time
Florian Westphal [Tue, 30 Apr 2024 14:58:07 +0000 (16:58 +0200)]
selftests: netfilter: nft_concat_range.sh: reduce debug kernel run time

Even a 1h timeout isn't enough for nft_concat_range.sh to complete on
debug kernels.

Reduce test complexity and only match on single entry if
KSFT_MACHINE_SLOW is set.

To spot 'slow' tests, print the subtest duration (in seconds) in
addition to the status.

Add new nft_concat_range_perf.sh script, not executed via kselftest,
to run the performance (pps match rate) tests.

Those need about 25m to complete which seems too much to run this
via 'make run_tests'.

Signed-off-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/20240430145810.23447-1-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agorxrpc: Clients must accept conn from any address
Jeffrey Altman [Fri, 19 Apr 2024 16:30:57 +0000 (13:30 -0300)]
rxrpc: Clients must accept conn from any address

The find connection logic of Transarc's Rx was modified in the mid-1990s
to support multi-homed servers which might send a response packet from
an address other than the destination address in the received packet.
The rules for accepting a packet by an Rx initiator (RX_CLIENT_CONNECTION)
were altered to permit acceptance of a packet from any address provided
that the port number was unchanged and all of the connection identifiers
matched (Epoch, CID, SecurityClass, ...).

This change applies the same rules to the Linux implementation which makes
it consistent with IBM AFS 3.6, Arla, OpenAFS and AuriStorFS.

Fixes: 17926a79320a ("[AF_RXRPC]: Provide secure RxRPC sockets for use by userspace and kernel both")
Signed-off-by: Jeffrey Altman <jaltman@auristor.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Marc Dionne <marc.dionne@auristor.com>
Link: https://lore.kernel.org/r/20240419163057.4141728-1-marc.dionne@auristor.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMerge tag 'regulator-fix-v6.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 1 May 2024 15:58:56 +0000 (08:58 -0700)]
Merge tag 'regulator-fix-v6.9-rc6' of git://git./linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "There's a few simple driver specific fixes here, plus some core
  cleanups from Matti which fix issues found with client drivers due to
  the API being confusing.

  The two fixes for the stubs provide more constructive behaviour with
  !REGULATOR configurations, issues were noticed with some hwmon drivers
  which would otherwise have needed confusing bodges in the users.

  The irq_helpers fix to duplicate the provided name for the interrupt
  controller was found because a driver got this wrong and it's again a
  case where the core is the sensible place to put the fix"

* tag 'regulator-fix-v6.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: change devm_regulator_get_enable_optional() stub to return Ok
  regulator: change stubbed devm_regulator_get_enable to return Ok
  regulator: vqmmc-ipq4019: fix module autoloading
  regulator: qcom-refgen: fix module autoloading
  regulator: mt6360: De-capitalize devicetree regulator subnodes
  regulator: irq_helpers: duplicate IRQ name

7 weeks agoipv6: anycast: use call_rcu_hurry() in aca_put()
Eric Dumazet [Mon, 29 Apr 2024 18:36:43 +0000 (18:36 +0000)]
ipv6: anycast: use call_rcu_hurry() in aca_put()

This is a followup of commit b5327b9a300e ("ipv6: use
call_rcu_hurry() in fib6_info_release()").

I had another pmtu.sh failure, and found another lazy
call_rcu() causing this failure.

aca_free_rcu() calls fib6_info_release() which releases
devices references.

We must not delay it too much or risk unregister_netdevice/ref_tracker
traces because references to netdev are not released in time.

This should speedup device/netns dismantles when CONFIG_RCU_LAZY=y

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agonet: core: reject skb_copy(_expand) for fraglist GSO skbs
Felix Fietkau [Sat, 27 Apr 2024 18:24:19 +0000 (20:24 +0200)]
net: core: reject skb_copy(_expand) for fraglist GSO skbs

SKB_GSO_FRAGLIST skbs must not be linearized, otherwise they become
invalid. Return NULL if such an skb is passed to skb_copy or
skb_copy_expand, in order to prevent a crash on a potential later
call to skb_gso_segment.

Fixes: 3a1296a38d0c ("net: Support GRO/GSO fraglist chaining.")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agonet: bridge: fix multicast-to-unicast with fraglist GSO
Felix Fietkau [Sat, 27 Apr 2024 18:24:18 +0000 (20:24 +0200)]
net: bridge: fix multicast-to-unicast with fraglist GSO

Calling skb_copy on a SKB_GSO_FRAGLIST skb is not valid, since it returns
an invalid linearized skb. This code only needs to change the ethernet
header, so pskb_copy is the right function to call here.

Fixes: 6db6f0eae605 ("bridge: multicast to unicast")
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
7 weeks agoxfrm: Restrict SA direction attribute to specific netlink message types
Antony Antony [Tue, 30 Apr 2024 07:09:45 +0000 (09:09 +0200)]
xfrm: Restrict SA direction attribute to specific netlink message types

Reject the usage of the SA_DIR attribute in xfrm netlink messages when
it's not applicable. This ensures that SA_DIR is only accepted for
certain message types (NEWSA, UPDSA, and ALLOCSPI)

Signed-off-by: Antony Antony <antony.antony@secunet.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
7 weeks agoxfrm: Add dir validation to "in" data path lookup
Antony Antony [Tue, 30 Apr 2024 07:09:29 +0000 (09:09 +0200)]
xfrm: Add dir validation to "in" data path lookup

Introduces validation for the x->dir attribute within the XFRM input
data lookup path. If the configured direction does not match the
expected direction, input, increment the XfrmInStateDirError counter
and drop the packet to ensure data integrity and correct flow handling.

grep -vw 0 /proc/net/xfrm_stat
XfrmInStateDirError      1

Signed-off-by: Antony Antony <antony.antony@secunet.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
7 weeks agoxfrm: Add dir validation to "out" data path lookup
Antony Antony [Tue, 30 Apr 2024 07:09:09 +0000 (09:09 +0200)]
xfrm: Add dir validation to "out" data path lookup

Introduces validation for the x->dir attribute within the XFRM output
data lookup path. If the configured direction does not match the expected
direction, output, increment the XfrmOutStateDirError counter and drop
the packet to ensure data integrity and correct flow handling.

grep -vw 0 /proc/net/xfrm_stat
XfrmOutPolError          1
XfrmOutStateDirError     1

Signed-off-by: Antony Antony <antony.antony@secunet.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Reviewed-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
7 weeks agoxfrm: Add Direction to the SA in or out
Antony Antony [Tue, 30 Apr 2024 07:08:52 +0000 (09:08 +0200)]
xfrm: Add Direction to the SA in or out

This patch introduces the 'dir' attribute, 'in' or 'out', to the
xfrm_state, SA, enhancing usability by delineating the scope of values
based on direction. An input SA will restrict values pertinent to input,
effectively segregating them from output-related values.
And an output SA will restrict attributes for output. This change aims
to streamline the configuration process and improve the overall
consistency of SA attributes during configuration.

This feature sets the groundwork for future patches, including
the upcoming IP-TFS patch.

Signed-off-by: Antony Antony <antony.antony@secunet.com>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
7 weeks agonetpoll: Fix race condition in netpoll_owner_active
Breno Leitao [Mon, 29 Apr 2024 10:04:33 +0000 (03:04 -0700)]
netpoll: Fix race condition in netpoll_owner_active

KCSAN detected a race condition in netpoll:

BUG: KCSAN: data-race in net_rx_action / netpoll_send_skb
write (marked) to 0xffff8881164168b0 of 4 bytes by interrupt on cpu 10:
net_rx_action (./include/linux/netpoll.h:90 net/core/dev.c:6712 net/core/dev.c:6822)
<snip>
read to 0xffff8881164168b0 of 4 bytes by task 1 on cpu 2:
netpoll_send_skb (net/core/netpoll.c:319 net/core/netpoll.c:345 net/core/netpoll.c:393)
netpoll_send_udp (net/core/netpoll.c:?)
<snip>
value changed: 0x0000000a -> 0xffffffff

This happens because netpoll_owner_active() needs to check if the
current CPU is the owner of the lock, touching napi->poll_owner
non atomically. The ->poll_owner field contains the current CPU holding
the lock.

Use an atomic read to check if the poll owner is the current CPU.

Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://lore.kernel.org/r/20240429100437.3487432-1-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agonet: loopback: Do not allocate lstats explicitly
Breno Leitao [Mon, 29 Apr 2024 08:55:58 +0000 (01:55 -0700)]
net: loopback: Do not allocate lstats explicitly

With commit 34d21de99cea9 ("net: Move {l,t,d}stats allocation to core and
convert veth & vrf"), stats allocation could be done on net core
instead of in this driver.

With this new approach, the driver doesn't have to bother with error
handling (allocation failure checking, making sure free happens in the
right spot, etc). This is core responsibility now.

Remove the allocation in the loopback driver and leverage the network
core allocation instead.

Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://lore.kernel.org/r/20240429085559.2841918-1-leitao@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agoMerge branch 'dt-bindings-net-snps-dwmac-remove-tx-sched-sp-property'
Jakub Kicinski [Wed, 1 May 2024 01:56:20 +0000 (18:56 -0700)]
Merge branch 'dt-bindings-net-snps-dwmac-remove-tx-sched-sp-property'

Flavio Suligoi says:

====================
dt-bindings: net: snps, dwmac: remove tx-sched-sp property

Strict priority for the tx scheduler is by default in Linux driver, so the
tx-sched-sp property was removed in commit aed6864035b1 ("net: stmmac:
platform: Delete a redundant condition branch").

This property is still in use in the following DT (and it will be removed
in a separate patch series):

- arch/arm64/boot/dts/freescale/imx8mp-beacon-som.dtsi
- arch/arm64/boot/dts/freescale/imx8mp-evk.dts
- arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
- arch/arm64/boot/dts/qcom/sa8540p-ride.dts
- arch/arm64/boot/dts/qcom/sa8775p-ride.dts

There is no problem if that property is still used in the DTs above,
since, as seen above, it is a default property of the driver.
====================

Link: https://lore.kernel.org/r/20240429092654.31390-1-f.suligoi@asem.it
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
7 weeks agodt-bindings: net: snps, dwmac: remove tx-sched-sp property
Flavio Suligoi [Mon, 29 Apr 2024 09:26:54 +0000 (11:26 +0200)]
dt-bindings: net: snps, dwmac: remove tx-sched-sp property

Strict priority for the tx scheduler is by default in Linux driver, so the
tx-sched-sp property was removed in commit aed6864035b1 ("net: stmmac:
platform: Delete a redundant condition branch").

This property is still in use in the following DT (and it will be removed
in a separate patch series):

- arch/arm64/boot/dts/freescale/imx8mp-beacon-som.dtsi
- arch/arm64/boot/dts/freescale/imx8mp-evk.dts
- arch/arm64/boot/dts/freescale/imx8mp-verdin.dtsi
- arch/arm64/boot/dts/qcom/sa8540p-ride.dts
- arch/arm64/boot/dts/qcom/sa8775p-ride.dts

There is no problem if that property is still used in the DTs above,
since, as seen above, it is a default property of the driver.

Signed-off-by: Flavio Suligoi <f.suligoi@asem.it>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Adam Ford <aford173@gmail.com>
Link: https://lore.kernel.org/r/20240429092654.31390-2-f.suligoi@asem.it
Signed-off-by: Jakub Kicinski <kuba@kernel.org>