linux-block.git
10 months agoethtool: Don't check for NULL info in prepare_data callbacks
Simon Horman [Wed, 31 Jul 2024 09:15:28 +0000 (10:15 +0100)]
ethtool: Don't check for NULL info in prepare_data callbacks

Since commit f946270d05c2 ("ethtool: netlink: always pass genl_info to
.prepare_data") the info argument of prepare_data callbacks is never
NULL. Remove checks present in callback implementations.

Link: https://lore.kernel.org/netdev/20240703121237.3f8b9125@kernel.org/
Signed-off-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240731-prepare_data-null-check-v1-1-627f2320678f@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agoRDS: IB: Remove unused declarations
Yue Haibing [Wed, 31 Jul 2024 06:36:30 +0000 (14:36 +0800)]
RDS: IB: Remove unused declarations

Commit f4f943c958a2 ("RDS: IB: ack more receive completions to improve performance")
removed rds_ib_recv_tasklet_fn() implementation but not the declaration.
And commit ec16227e1414 ("RDS/IB: Infiniband transport") declared but never implemented
other functions.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Link: https://patch.msgid.link/20240731063630.3592046-1-yuehaibing@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agonet: ethernet: mtk_eth_soc: drop clocks unused by Ethernet driver
Daniel Golle [Tue, 30 Jul 2024 10:36:42 +0000 (11:36 +0100)]
net: ethernet: mtk_eth_soc: drop clocks unused by Ethernet driver

Clocks for SerDes and PHY are going to be handled by standalone drivers
for each of those hardware components. Drop them from the Ethernet driver.

The clocks which are being removed for this patch are responsible for
the for the SerDes PCS and PHYs used for the 2nd and 3rd MAC which are
anyway not yet supported. Hence backwards compatibility is not an issue.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patch.msgid.link/b5faaf69b5c6e3e155c64af03706c3c423c6a1c9.1722335682.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agonet/mlx5: Reclaim max 50K pages at once
Anand Khoje [Tue, 30 Jul 2024 07:36:33 +0000 (13:06 +0530)]
net/mlx5: Reclaim max 50K pages at once

In non FLR context, at times CX-5 requests release of ~8 million FW pages.
This needs humongous number of cmd mailboxes, which to be released once
the pages are reclaimed. Release of humongous number of cmd mailboxes is
consuming cpu time running into many seconds. Which with non preemptible
kernels is leading to critical process starving on that cpu’s RQ.
On top of it, the FW does not use all the mailbox messages as it has a
limit of releasing 50K pages at once per MLX5_CMD_OP_MANAGE_PAGES +
MLX5_PAGES_TAKE device command. Hence, the allocation of these many
mailboxes is extra and adds unnecessary overhead.
To alleviate this, this change restricts the total number of pages
a worker will try to reclaim to maximum 50K pages in one go.

Our tests have shown significant benefit of this change in terms of
time consumed by dma_pool_free().
During a test where an event was raised by HCA
to release 1.3 Million pages, following observations were made:

- Without this change:
Number of mailbox messages allocated was around 20K, to accommodate
the DMA addresses of 1.3 million pages.
The average time spent by dma_pool_free() to free the DMA pool is between
16 usec to 32 usec.
           value  ------------- Distribution ------------- count
             256 |                                         0
             512 |@                                        287
            1024 |@@@                                      1332
            2048 |@                                        656
            4096 |@@@@@                                    2599
            8192 |@@@@@@@@@@                               4755
           16384 |@@@@@@@@@@@@@@@                          7545
           32768 |@@@@@                                    2501
           65536 |                                         0

- With this change:
Number of mailbox messages allocated was around 800; this was to
accommodate DMA addresses of only 50K pages.
The average time spent by dma_pool_free() to free the DMA pool in this case
lies between 1 usec to 2 usec.
           value  ------------- Distribution ------------- count
             256 |                                         0
             512 |@@@@@@@@@@@@@@@@@@                       346
            1024 |@@@@@@@@@@@@@@@@@@@@@@                   435
            2048 |                                         0
            4096 |                                         0
            8192 |                                         1
           16384 |                                         0

Signed-off-by: Anand Khoje <anand.a.khoje@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Reviewed-by: Zhu Yanjun <yanjun.zhu@linux.dev>
Acked-by: Saeed Mahameed <saeedm@nvidia.com>
Link: https://patch.msgid.link/20240730073634.114407-1-anand.a.khoje@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agonet: skbuff: Skip early return in skb_unref when debugging
Breno Leitao [Mon, 29 Jul 2024 10:47:40 +0000 (03:47 -0700)]
net: skbuff: Skip early return in skb_unref when debugging

This patch modifies the skb_unref function to skip the early return
optimization when CONFIG_DEBUG_NET is enabled. The change ensures that
the reference count decrement always occurs in debug builds, allowing
for more thorough checking of SKB reference counting.

Previously, when the SKB's reference count was 1 and CONFIG_DEBUG_NET
was not set, the function would return early after a memory barrier
(smp_rmb()) without decrementing the reference count. This optimization
assumes it's safe to proceed with freeing the SKB without the overhead
of an atomic decrement from 1 to 0.

With this change:
- In non-debug builds (CONFIG_DEBUG_NET not set), behavior remains
  unchanged, preserving the performance optimization.
- In debug builds (CONFIG_DEBUG_NET set), the reference count is always
  decremented, even when it's 1, allowing for consistent behavior and
  potentially catching subtle SKB management bugs.

This modification enhances debugging capabilities for networking code
without impacting performance in production kernels. It helps kernel
developers identify and diagnose issues related to SKB management and
reference counting in the network stack.

Cc: Chris Mason <clm@fb.com>
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20240729104741.370327-1-leitao@debian.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
10 months agoMerge branch 'ethernet-convert-from-tasklet-to-bh-workqueue'
Jakub Kicinski [Thu, 1 Aug 2024 02:05:19 +0000 (19:05 -0700)]
Merge branch 'ethernet-convert-from-tasklet-to-bh-workqueue'

Allen Pais says:

====================
ethernet: Convert from tasklet to BH workqueue [part]

The only generic interface to execute asynchronously in the BH context is
tasklet; however, it's marked deprecated and has some design flaws. To
replace tasklets, BH workqueue support was recently added. A BH workqueue
behaves similarly to regular workqueues except that the queued work items
are executed in the BH context.

This patch converts a few drivers in drivers/ethernet/* from tasklet
to BH workqueue. The next set will be sent out after the next -rc is
out.

v2: https://lore.kernel.org/20240621183947.4105278-1-allen.lkml@gmail.com
v1: https://lore.kernel.org/20240507190111.16710-2-apais@linux.microsoft.com
====================

Link: https://patch.msgid.link/20240730183403.4176544-1-allen.lkml@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agonet: macb: Convert tasklet API to new bottom half workqueue mechanism
Allen Pais [Tue, 30 Jul 2024 18:33:52 +0000 (11:33 -0700)]
net: macb: Convert tasklet API to new bottom half workqueue mechanism

Migrate tasklet APIs to the new bottom half workqueue mechanism. It
replaces all occurrences of tasklet usage with the appropriate workqueue
APIs throughout the macb driver. This transition ensures compatibility
with the latest design and enhances performance.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://patch.msgid.link/20240730183403.4176544-5-allen.lkml@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agonet: cnic: Convert tasklet API to new bottom half workqueue mechanism
Allen Pais [Tue, 30 Jul 2024 18:33:51 +0000 (11:33 -0700)]
net: cnic: Convert tasklet API to new bottom half workqueue mechanism

Migrate tasklet APIs to the new bottom half workqueue mechanism. It
replaces all occurrences of tasklet usage with the appropriate workqueue
APIs throughout the cnic driver. This transition ensures compatibility
with the latest design and enhances performance.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://patch.msgid.link/20240730183403.4176544-4-allen.lkml@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agonet: xgbe: Convert tasklet API to new bottom half workqueue mechanism
Allen Pais [Tue, 30 Jul 2024 18:33:50 +0000 (11:33 -0700)]
net: xgbe: Convert tasklet API to new bottom half workqueue mechanism

Migrate tasklet APIs to the new bottom half workqueue mechanism. It
replaces all occurrences of tasklet usage with the appropriate workqueue
APIs throughout the xgbe driver. This transition ensures compatibility
with the latest design and enhances performance.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://patch.msgid.link/20240730183403.4176544-3-allen.lkml@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agonet: alteon: Convert tasklet API to new bottom half workqueue mechanism
Allen Pais [Tue, 30 Jul 2024 18:33:49 +0000 (11:33 -0700)]
net: alteon: Convert tasklet API to new bottom half workqueue mechanism

Migrate tasklet APIs to the new bottom half workqueue mechanism. It
replaces all occurrences of tasklet usage with the appropriate workqueue
APIs throughout the alteon driver. This transition ensures compatibility
with the latest design and enhances performance.

Signed-off-by: Allen Pais <allen.lkml@gmail.com>
Link: https://patch.msgid.link/20240730183403.4176544-2-allen.lkml@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agoMerge branch 'mlxsw-core_thermal-small-cleanups'
Jakub Kicinski [Thu, 1 Aug 2024 01:38:31 +0000 (18:38 -0700)]
Merge branch 'mlxsw-core_thermal-small-cleanups'

Petr Machata says:

====================
mlxsw: core_thermal: Small cleanups

Ido Schimmel says:

Clean up various issues which I noticed while addressing feedback on a
different patchset.
====================

Link: https://patch.msgid.link/cover.1722345311.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomlxsw: core_thermal: Fix -Wformat-truncation warning
Ido Schimmel [Tue, 30 Jul 2024 13:58:21 +0000 (15:58 +0200)]
mlxsw: core_thermal: Fix -Wformat-truncation warning

The name of a thermal zone device cannot be longer than 19 characters
('THERMAL_NAME_LENGTH - 1'). The format string 'mlxsw-lc%d-module%d' can
exceed this limitation if the maximum number of line cards cannot be
represented using a single digit and the maximum number of transceiver
modules cannot be represented using two digits.

This is not the case with current systems nor future ones. Therefore,
increase the size of the result buffer beyond 'THERMAL_NAME_LENGTH' and
suppress the following build warning [1].

If this limitation is ever exceeded, we will know about it since the
thermal core validates the thermal device's name during registration.

[1]
drivers/net/ethernet/mellanox/mlxsw/core_thermal.c: In function ‘mlxsw_thermal_modules_init.part.0’:
drivers/net/ethernet/mellanox/mlxsw/core_thermal.c:418:70: error: ‘%d’ directive output may be truncated writing between 1 and 3 bytes into a region of size between 2 and 4 [-Werror=format-truncation=]
  418 |                 snprintf(tz_name, sizeof(tz_name), "mlxsw-lc%d-module%d",
      |                                                                      ^~
In function ‘mlxsw_thermal_module_tz_init’,
    inlined from ‘mlxsw_thermal_module_init’ at drivers/net/ethernet/mellanox/mlxsw/core_thermal.c:465:9,
    inlined from ‘mlxsw_thermal_modules_init.part.0’ at drivers/net/ethernet/mellanox/mlxsw/core_thermal.c:500:9:
drivers/net/ethernet/mellanox/mlxsw/core_thermal.c:418:52: note: directive argument in the range [1, 256]
  418 |                 snprintf(tz_name, sizeof(tz_name), "mlxsw-lc%d-module%d",
      |                                                    ^~~~~~~~~~~~~~~~~~~~~
drivers/net/ethernet/mellanox/mlxsw/core_thermal.c:418:17: note: ‘snprintf’ output between 18 and 22 bytes into a destination of size 20
  418 |                 snprintf(tz_name, sizeof(tz_name), "mlxsw-lc%d-module%d",
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  419 |                          module_tz->slot_index, module_tz->module + 1);
      |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/583a70c6dbe75e6bf0c2c58abbb3470a860d2dc3.1722345311.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomlxsw: core_thermal: Remove unnecessary assignments
Ido Schimmel [Tue, 30 Jul 2024 13:58:20 +0000 (15:58 +0200)]
mlxsw: core_thermal: Remove unnecessary assignments

Setting both pointers to NULL is unnecessary since the code never checks
whether these pointers are NULL or not. Remove the assignments.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/ea646f5d7642fffd5393fa23650660ab8f77a511.1722345311.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomlxsw: core_thermal: Remove unnecessary checks
Ido Schimmel [Tue, 30 Jul 2024 13:58:19 +0000 (15:58 +0200)]
mlxsw: core_thermal: Remove unnecessary checks

mlxsw_thermal_module_fini() cannot be invoked with a thermal module
which is NULL or which is not associated with a thermal zone, so remove
these checks.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/8db5fe0a3a28ba09a15d4102cc03f7e8ca7675be.1722345311.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomlxsw: core_thermal: Simplify rollback
Ido Schimmel [Tue, 30 Jul 2024 13:58:18 +0000 (15:58 +0200)]
mlxsw: core_thermal: Simplify rollback

During rollback, instead of calling mlxsw_thermal_module_fini() for all
the modules, only call it for modules that were successfully
initialized. This is not a bug fix since mlxsw_thermal_module_fini()
first checks that the module was initialized.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/905bebc45f6e246031f0c5c177bba8efe11e05f5.1722345311.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomlxsw: core_thermal: Make mlxsw_thermal_module_{init, fini} symmetric
Ido Schimmel [Tue, 30 Jul 2024 13:58:17 +0000 (15:58 +0200)]
mlxsw: core_thermal: Make mlxsw_thermal_module_{init, fini} symmetric

mlxsw_thermal_module_fini() de-initializes the module's thermal zone,
but mlxsw_thermal_module_init() does not initialize it. Make both
functions symmetric by moving the initialization of the module's thermal
zone to mlxsw_thermal_module_init().

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/a661ad468f8ad0d7d533d8334e4abf61dfe34342.1722345311.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomlxsw: core_thermal: Remove unused arguments
Ido Schimmel [Tue, 30 Jul 2024 13:58:16 +0000 (15:58 +0200)]
mlxsw: core_thermal: Remove unused arguments

'dev' and 'core' arguments are not used by mlxsw_thermal_module_init().
Remove them.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/563fc7383f61809a306b9954872219eaaf3c689b.1722345311.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomlxsw: core_thermal: Fold two loops into one
Ido Schimmel [Tue, 30 Jul 2024 13:58:15 +0000 (15:58 +0200)]
mlxsw: core_thermal: Fold two loops into one

There is no need to traverse the same array twice. Do it once by folding
both loops into one.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/81756744ed532aaa9249a83fc08757accfe8b07c.1722345311.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomlxsw: core_thermal: Remove another unnecessary check
Ido Schimmel [Tue, 30 Jul 2024 13:58:14 +0000 (15:58 +0200)]
mlxsw: core_thermal: Remove another unnecessary check

mlxsw_thermal_modules_init() allocates an array of modules and then
initializes each entry by calling mlxsw_thermal_module_init() which
among other things initializes the 'parent' pointer of the entry.

mlxsw_thermal_modules_init() then traverses over the array again, but
skips over entries that do not have their 'parent' pointer set which is
impossible given the above.

Therefore, remove the unnecessary check.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/fb3e8ded422a441436431d5785b900f11ffc9621.1722345311.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomlxsw: core_thermal: Remove unnecessary check
Ido Schimmel [Tue, 30 Jul 2024 13:58:13 +0000 (15:58 +0200)]
mlxsw: core_thermal: Remove unnecessary check

mlxsw_thermal_modules_init() allocates an array of modules and then
calls mlxsw_thermal_module_init() to initialize each entry in the array.
It is therefore impossible for mlxsw_thermal_module_init() to encounter
an entry that is already initialized and has its 'parent' pointer set.

Remove the unnecessary check.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomlxsw: core_thermal: Call thermal_zone_device_unregister() unconditionally
Ido Schimmel [Tue, 30 Jul 2024 13:58:12 +0000 (15:58 +0200)]
mlxsw: core_thermal: Call thermal_zone_device_unregister() unconditionally

The function returns immediately if the thermal zone pointer is NULL so
there is no need to check it before calling the function.

Remove the check.

Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Vadim Pasternak <vadimp@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/0bd251aa8ce03d3c951983aa6b4300d8205b88a7.1722345311.git.petrm@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agonet/mlx4: Add support for EEPROM high pages query for QSFP/QSFP+/QSFP28
Krzysztof Olędzki [Wed, 31 Jul 2024 00:49:53 +0000 (17:49 -0700)]
net/mlx4: Add support for EEPROM high pages query for QSFP/QSFP+/QSFP28

Enable reading additional EEPROM information from high pages such as
thresholds and alarms on QSFP/QSFP+/QSFP28 modules.

"This is similar to commit a708fb7b1f8d ("net/mlx5e: ethtool, Add
support for EEPROM high pages query") but given all the required logic
already exists in mlx4_qsfp_eeprom_params_set() only s/_LEN/MAX_LEN/ is
needed.

Tested-by: Dan Merillat <git@dan.merillat.org>
Signed-off-by: Krzysztof Piotr Oledzki <ole@ans.pl>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/b17c5336-6dc3-41f2-afa6-f9e79231f224@ans.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agoAdd support for PIO p flag
Patrick Rohr [Mon, 29 Jul 2024 22:00:59 +0000 (15:00 -0700)]
Add support for PIO p flag

draft-ietf-6man-pio-pflag is adding a new flag to the Prefix Information
Option to signal that the network can allocate a unique IPv6 prefix per
client via DHCPv6-PD (see draft-ietf-v6ops-dhcp-pd-per-device).

When ra_honor_pio_pflag is enabled, the presence of a P-flag causes
SLAAC autoconfiguration to be disabled for that particular PIO.

An automated test has been added in Android (r.android.com/3195335) to
go along with this change.

Cc: Maciej Żenczykowski <maze@google.com>
Cc: Lorenzo Colitti <lorenzo@google.com>
Cc: David Lamparter <equinox@opensourcerouting.org>
Cc: Simon Horman <horms@kernel.org>
Signed-off-by: Patrick Rohr <prohr@google.com>
Reviewed-by: Maciej Żenczykowski <maze@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agoMerge branch 'smc-cleanups' into main
David S. Miller [Wed, 31 Jul 2024 10:48:59 +0000 (11:48 +0100)]
Merge branch 'smc-cleanups' into main

Zhengchao Shao says:

====================
net/smc: do some cleanups in smc module

Do some cleanups in smc module.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agonet/smc: remove unused input parameters in smcr_new_buf_create
Zhengchao Shao [Tue, 30 Jul 2024 01:25:06 +0000 (09:25 +0800)]
net/smc: remove unused input parameters in smcr_new_buf_create

The input parameter "is_rmb" of the smcr_new_buf_create function
has never been used, remove it.

Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agonet/smc: remove redundant code in smc_connect_check_aclc
Zhengchao Shao [Tue, 30 Jul 2024 01:25:05 +0000 (09:25 +0800)]
net/smc: remove redundant code in smc_connect_check_aclc

When the SMC client perform CLC handshake, it will check whether
the clc header type is correct in receiving SMC_CLC_ACCEPT packet.
The specific invoking path is as follows:
__smc_connect
  smc_connect_clc
    smc_clc_wait_msg
      smc_clc_msg_hdr_valid
        smc_clc_msg_acc_conf_valid
Therefore, the smc_connect_check_aclc interface invoked by
__smc_connect does not need to check type again.

Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agonet/smc: remove the fallback in __smc_connect
Zhengchao Shao [Tue, 30 Jul 2024 01:25:04 +0000 (09:25 +0800)]
net/smc: remove the fallback in __smc_connect

When the SMC client begins to connect to server, smcd_version is set
to SMC_V1 + SMC_V2. If fail to get VLAN ID, only SMC_V2 information
is left in smcd_version. And smcd_version will not be changed to 0.
Therefore, remove the fallback caused by the failure to get VLAN ID.

Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agonet/smc: remove unreferenced header in smc_loopback.h file
Zhengchao Shao [Tue, 30 Jul 2024 01:25:03 +0000 (09:25 +0800)]
net/smc: remove unreferenced header in smc_loopback.h file

Because linux/err.h is unreferenced in smc_loopback.h file, so
remove it.

Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: D. Wythe <alibuda@linux.alibaba.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agodt-bindings: net: dsa: vsc73xx: add {rx,tx}-internal-delay-ps
Pawel Dembicki [Mon, 29 Jul 2024 21:02:01 +0000 (23:02 +0200)]
dt-bindings: net: dsa: vsc73xx: add {rx,tx}-internal-delay-ps

Add a schema validator to vitesse,vsc73xx.yaml for MAC-level RGMII delays
in the CPU port. Additionally, valid values for VSC73XX were defined,
and a common definition for the RX and TX valid range was created.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agonet: dsa: vsc73xx: make RGMII delays configurable
Pawel Dembicki [Mon, 29 Jul 2024 21:01:59 +0000 (23:01 +0200)]
net: dsa: vsc73xx: make RGMII delays configurable

This patch switches hardcoded RGMII transmit/receive delay to
a configurable value. Delay values are taken from the properties of
the CPU port: 'tx-internal-delay-ps' and 'rx-internal-delay-ps'.

The default value is configured to 2.0 ns to maintain backward
compatibility with existing code.

Signed-off-by: Pawel Dembicki <paweldembicki@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agoMerge branch 'l2tp-session-cleanup' into main
David S. Miller [Wed, 31 Jul 2024 08:25:14 +0000 (09:25 +0100)]
Merge branch 'l2tp-session-cleanup' into main

James Chapman says:

====================
l2tp: simplify tunnel and session cleanup

This series simplifies and improves l2tp tunnel and session cleanup.

 * refactor l2tp management code to not use the tunnel socket's
   sk_user_data. This allows the tunnel and its socket to be closed
   and freed without sequencing the two using the socket's sk_destruct
   hook.

 * export ip_flush_pending_frames and use it when closing l2tp_ip
   sockets.

 * move the work of closing all sessions in the tunnel to the work
   queue so that sessions are deleted using the same codepath whether
   they are closed by user API request or their parent tunnel is
   closing.

 * refactor l2tp_ppp pppox socket / session relationship to have the
   session keep the socket alive, not the other way around. Previously
   the pppox socket held a ref on the session, which complicated
   session delete by having to go through the pppox socket destructor.

 * free sessions and pppox sockets by rcu.

 * fix a possible tunnel refcount underflow.

 * avoid using rcu_barrier in net exit handler.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: use pre_exit pernet hook to avoid rcu_barrier
James Chapman [Mon, 29 Jul 2024 15:38:14 +0000 (16:38 +0100)]
l2tp: use pre_exit pernet hook to avoid rcu_barrier

Move the work of closing all tunnels from the pernet exit hook to
pre_exit since the core does rcu synchronisation between these steps
and we can therefore remove rcu_barrier from l2tp code.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: cleanup eth/ppp pseudowire setup code
James Chapman [Mon, 29 Jul 2024 15:38:13 +0000 (16:38 +0100)]
l2tp: cleanup eth/ppp pseudowire setup code

l2tp eth/ppp pseudowire setup/cleanup uses kfree() in some error
paths. Drop the refcount instead such that the session object is
always freed when the refcount reaches 0.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: add idr consistency check in session_register
James Chapman [Mon, 29 Jul 2024 15:38:12 +0000 (16:38 +0100)]
l2tp: add idr consistency check in session_register

l2tp_session_register uses an idr_alloc then idr_replace pattern to
insert sessions into the session IDR. To catch invalid locking, add a
WARN_ON_ONCE if the IDR entry is modified by another thread between
alloc and replace steps.

Also add comments to make expectations clear.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: use rcu list add/del when updating lists
James Chapman [Mon, 29 Jul 2024 15:38:11 +0000 (16:38 +0100)]
l2tp: use rcu list add/del when updating lists

l2tp_v3_session_htable and tunnel->session_list are read by lockless
getters using RCU. Use rcu list variants when adding or removing list
items.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: prevent possible tunnel refcount underflow
James Chapman [Mon, 29 Jul 2024 15:38:10 +0000 (16:38 +0100)]
l2tp: prevent possible tunnel refcount underflow

When a session is created, it sets a backpointer to its tunnel. When
the session refcount drops to 0, l2tp_session_free drops the tunnel
refcount if session->tunnel is non-NULL. However, session->tunnel is
set in l2tp_session_create, before the tunnel refcount is incremented
by l2tp_session_register, which leaves a small window where
session->tunnel is non-NULL when the tunnel refcount hasn't been
bumped.

Moving the assignment to l2tp_session_register is trivial but
l2tp_session_create calls l2tp_session_set_header_len which uses
session->tunnel to get the tunnel's encap. Add an encap arg to
l2tp_session_set_header_len to avoid using session->tunnel.

If l2tpv3 sessions have colliding IDs, it is possible for
l2tp_v3_session_get to race with l2tp_session_register and fetch a
session which doesn't yet have session->tunnel set. Add a check for
this case.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: refactor ppp socket/session relationship
James Chapman [Mon, 29 Jul 2024 15:38:09 +0000 (16:38 +0100)]
l2tp: refactor ppp socket/session relationship

Each l2tp ppp session has an associated pppox socket. l2tp_ppp uses
the session's pppox socket refcount to manage session lifetimes; the
pppox socket holds a ref on the session which is dropped by the socket
destructor. This complicates session cleanup.

Given l2tp sessions are refcounted, it makes more sense to reverse
this relationship such that the session keeps the socket alive, not
the other way around. So refactor l2tp_ppp to have the session hold a
ref on its socket while it references it. When the session is closed,
it drops its socket ref when it detaches from its socket. If the
socket is closed first, it initiates the closing of its session, if
one is attached. The socket/session can then be freed asynchronously
when their refcounts drop to 0.

Use the session's session_close callback to detach the pppox socket
since this will be done on the work queue together with the rest of
the session cleanup via l2tp_session_delete.

Also, since l2tp_ppp uses the pppox socket's sk_user_data, use the rcu
sk_user_data access helpers when accessing it and set the socket's
SOCK_RCU_FREE flag to have pppox sockets freed by rcu.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: free sessions using rcu
James Chapman [Mon, 29 Jul 2024 15:38:08 +0000 (16:38 +0100)]
l2tp: free sessions using rcu

l2tp sessions may be accessed under an rcu read lock. Have them freed
via rcu and remove the now unneeded synchronize_rcu when a session is
removed.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: delete sessions using work queue
James Chapman [Mon, 29 Jul 2024 15:38:07 +0000 (16:38 +0100)]
l2tp: delete sessions using work queue

When a tunnel is closed, l2tp_tunnel_closeall closes all sessions in
the tunnel. Move the work of deleting each session to the work queue
so that sessions are deleted using the same codepath whether they are
closed by user API request or their parent tunnel is closing. This
also avoids the locking dance in l2tp_tunnel_closeall where the
tunnel's session list lock was unlocked and relocked in the loop.

In l2tp_exit_net, use drain_workqueue instead of flush_workqueue
because the processing of tunnel_delete work may queue session_delete
work items which must also be processed.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: simplify tunnel and socket cleanup
James Chapman [Mon, 29 Jul 2024 15:38:06 +0000 (16:38 +0100)]
l2tp: simplify tunnel and socket cleanup

When the l2tp tunnel socket used sk_user_data to point to its
associated l2tp tunnel, socket and tunnel cleanup had to make use of
the socket's destructor to free the tunnel only when the socket could
no longer be accessed.

Now that sk_user_data is no longer used, we can simplify socket and
tunnel cleanup:

  * If the tunnel closes first, it cleans up and drops its socket ref
    when the tunnel refcount drops to zero. If its socket was provided
    by userspace, the socket is closed and freed asynchronously, when
    userspace closes it. If its socket is a kernel socket, the tunnel
    closes the socket itself during cleanup and drops its socket ref
    when the tunnel's refcount drops to zero.

  * If the socket closes first, we initiate the closing of its
    associated tunnel. For UDP sockets, this is via the socket's
    encap_destroy hook. For L2TPIP sockets, this is via the socket's
    destroy callback. The tunnel holds a socket ref while it
    references the sock. When the tunnel is freed, it drops its socket
    ref and the socket will be cleaned up when its own refcount drops
    to zero, asynchronous to the tunnel free.

  * The tunnel socket destructor is no longer needed since the tunnel
    is no longer freed through the socket destructor.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: remove unused tunnel magic field
James Chapman [Mon, 29 Jul 2024 15:38:05 +0000 (16:38 +0100)]
l2tp: remove unused tunnel magic field

Since l2tp no longer derives tunnel pointers directly via
sk_user_data, it is no longer useful for l2tp to check tunnel pointers
using a magic feather. Drop the tunnel's magic field.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: don't set sk_user_data in tunnel socket
James Chapman [Mon, 29 Jul 2024 15:38:04 +0000 (16:38 +0100)]
l2tp: don't set sk_user_data in tunnel socket

l2tp no longer uses the tunnel socket's sk_user_data so drop the code
which sets it.

In l2tp_validate_socket use l2tp_sk_to_tunnel to check whether a given
socket is already attached to an l2tp tunnel since we can no longer
use non-null sk_user_data to indicate this.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: don't use tunnel socket sk_user_data in ppp procfs output
James Chapman [Mon, 29 Jul 2024 15:38:03 +0000 (16:38 +0100)]
l2tp: don't use tunnel socket sk_user_data in ppp procfs output

l2tp's ppp procfs output can be used to show internal state of
pppol2tp. It includes a 'user-data-ok' field, which is derived from
the tunnel socket's sk_user_data being non-NULL. Use tunnel->sock
being non-NULL to indicate this instead.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: have l2tp_ip_destroy_sock use ip_flush_pending_frames
James Chapman [Mon, 29 Jul 2024 15:38:02 +0000 (16:38 +0100)]
l2tp: have l2tp_ip_destroy_sock use ip_flush_pending_frames

Use the recently exported ip_flush_pending_frames instead of a
free-coded version and lock the socket while we call it.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agoipv4: export ip_flush_pending_frames
James Chapman [Mon, 29 Jul 2024 15:38:01 +0000 (16:38 +0100)]
ipv4: export ip_flush_pending_frames

To avoid protocol modules implementing their own, export
ip_flush_pending_frames.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agol2tp: lookup tunnel from socket without using sk_user_data
James Chapman [Mon, 29 Jul 2024 15:38:00 +0000 (16:38 +0100)]
l2tp: lookup tunnel from socket without using sk_user_data

l2tp_sk_to_tunnel derives the tunnel from sk_user_data. Instead,
lookup the tunnel by walking the tunnel IDR for a tunnel using the
indicated sock. This is slow but l2tp_sk_to_tunnel is not used in
the datapath so performance isn't critical.

l2tp_tunnel_destruct needs a variant of l2tp_sk_to_tunnel which does
not bump the tunnel refcount since the tunnel refcount is already 0.

Change l2tp_sk_to_tunnel sk arg to const since it does not modify sk.

Signed-off-by: James Chapman <jchapman@katalix.com>
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agonet/tcp: Expand goo.gl link
Dr. David Alan Gilbert [Mon, 29 Jul 2024 20:53:37 +0000 (21:53 +0100)]
net/tcp: Expand goo.gl link

The goo.gl URL shortener is deprecated and is due to stop
expanding existing links in 2025.

Expand the link in Kconfig.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240729205337.48058-1-linux@treblig.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agonet: wangxun: use net_prefetch to simplify logic
Joe Damato [Mon, 29 Jul 2024 15:26:47 +0000 (15:26 +0000)]
net: wangxun: use net_prefetch to simplify logic

Use net_prefetch to remove #ifdef and simplify prefetch logic. This
follows the pattern introduced in a previous commit f468f21b7af0 ("net:
Take common prefetch code structure into a function"), which replaced
the same logic in all existing drivers at that time.

Signed-off-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: Wojciech Drewek <wojciech.drewek@intel.com>
Link: https://patch.msgid.link/20240729152651.258713-1-jdamato@fastly.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agoMerge tag 'net-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 25 Jul 2024 20:32:25 +0000 (13:32 -0700)]
Merge tag 'net-6.11-rc1' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from bpf and netfilter.

  A lot of networking people were at a conference last week, busy
  catching COVID, so relatively short PR.

  Current release - regressions:

   - tcp: process the 3rd ACK with sk_socket for TFO and MPTCP

  Current release - new code bugs:

   - l2tp: protect session IDR and tunnel session list with one lock,
     make sure the state is coherent to avoid a warning

   - eth: bnxt_en: update xdp_rxq_info in queue restart logic

   - eth: airoha: fix location of the MBI_RX_AGE_SEL_MASK field

  Previous releases - regressions:

   - xsk: require XDP_UMEM_TX_METADATA_LEN to actuate tx_metadata_len,
     the field reuses previously un-validated pad

  Previous releases - always broken:

   - tap/tun: drop short frames to prevent crashes later in the stack

   - eth: ice: add a per-VF limit on number of FDIR filters

   - af_unix: disable MSG_OOB handling for sockets in sockmap/sockhash"

* tag 'net-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (34 commits)
  tun: add missing verification for short frame
  tap: add missing verification for short frame
  mISDN: Fix a use after free in hfcmulti_tx()
  gve: Fix an edge case for TSO skb validity check
  bnxt_en: update xdp_rxq_info in queue restart logic
  tcp: process the 3rd ACK with sk_socket for TFO/MPTCP
  selftests/bpf: Add XDP_UMEM_TX_METADATA_LEN to XSK TX metadata test
  xsk: Require XDP_UMEM_TX_METADATA_LEN to actuate tx_metadata_len
  bpf: Fix a segment issue when downgrading gso_size
  net: mediatek: Fix potential NULL pointer dereference in dummy net_device handling
  MAINTAINERS: make Breno the netconsole maintainer
  MAINTAINERS: Update bonding entry
  net: nexthop: Initialize all fields in dumped nexthops
  net: stmmac: Correct byte order of perfect_match
  selftests: forwarding: skip if kernel not support setting bridge fdb learning limit
  tipc: Return non-zero value from tipc_udp_addr2str() on error
  netfilter: nft_set_pipapo_avx2: disable softinterrupts
  ice: Fix recipe read procedure
  ice: Add a per-VF limit on number of FDIR filters
  net: bonding: correctly annotate RCU in bond_should_notify_peers()
  ...

10 months agoMerge tag 'printk-for-6.11-trivial' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 25 Jul 2024 20:18:41 +0000 (13:18 -0700)]
Merge tag 'printk-for-6.11-trivial' of git://git./linux/kernel/git/printk/linux

Pull printk updates from Petr Mladek:

 - trivial printk changes

The bigger "real" printk work is still being discussed.

* tag 'printk-for-6.11-trivial' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux:
  vsprintf: add missing MODULE_DESCRIPTION() macro
  printk: Rename console_replay_all() and update context

10 months agoMerge tag 'constfy-sysctl-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Thu, 25 Jul 2024 19:58:36 +0000 (12:58 -0700)]
Merge tag 'constfy-sysctl-6.11-rc1' of git://git./linux/kernel/git/sysctl/sysctl

Pull sysctl constification from Joel Granados:
 "Treewide constification of the ctl_table argument of proc_handlers
  using a coccinelle script and some manual code formatting fixups.

  This is a prerequisite to moving the static ctl_table structs into
  read-only data section which will ensure that proc_handler function
  pointers cannot be modified"

* tag 'constfy-sysctl-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl:
  sysctl: treewide: constify the ctl_table argument of proc_handlers

10 months agoMerge tag 'efi-fixes-for-v6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 25 Jul 2024 19:55:21 +0000 (12:55 -0700)]
Merge tag 'efi-fixes-for-v6.11-1' of git://git./linux/kernel/git/efi/efi

Pull EFI fixes from Ard Biesheuvel:

 - Wipe screen_info after allocating it from the heap - used by arm32
   and EFI zboot, other EFI architectures allocate it statically

 - Revert to allocating boot_params from the heap on x86 when entering
   via the native PE entrypoint, to work around a regression on older
   Dell hardware

* tag 'efi-fixes-for-v6.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  x86/efistub: Revert to heap allocated boot_params for PE entrypoint
  efi/libstub: Zero initialize heap allocated struct screen_info

10 months agoMerge tag 'kgdb-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt...
Linus Torvalds [Thu, 25 Jul 2024 19:48:42 +0000 (12:48 -0700)]
Merge tag 'kgdb-6.11-rc1' of git://git./linux/kernel/git/danielt/linux

Pull kgdb updates from Daniel Thompson:
 "Three small changes this cycle:

   - Clean up an architecture abstraction that is no longer needed
     because all the architectures have converged.

   - Actually use the prompt argument to kdb_position_cursor() instead
     of ignoring it (functionally this fix is a nop but that was due to
     luck rather than good judgement)

   - Fix a -Wformat-security warning"

* tag 'kgdb-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux:
  kdb: Get rid of redundant kdb_curr_task()
  kdb: Use the passed prompt in kdb_position_cursor()
  kdb: address -Wformat-security warnings

10 months agoMerge tag 'mips_6.11_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
Linus Torvalds [Thu, 25 Jul 2024 19:41:53 +0000 (12:41 -0700)]
Merge tag 'mips_6.11_1' of git://git./linux/kernel/git/mips/linux

Pull MIPS updates from Thomas Bogendoerfer:

 - Use improved timer sync for Loongson64

 - Fix address of GCR_ACCESS register

 - Add missing MODULE_DESCRIPTION

* tag 'mips_6.11_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  mips: sibyte: add missing MODULE_DESCRIPTION() macro
  MIPS: SMP-CPS: Fix address for GCR_ACCESS register for CM3 and later
  MIPS: Loongson64: Switch to SYNC_R4K

10 months agoMerge tag 'parisc-for-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 25 Jul 2024 19:37:42 +0000 (12:37 -0700)]
Merge tag 'parisc-for-6.11-rc1' of git://git./linux/kernel/git/deller/parisc-linux

Pull parisc updates from Helge Deller:
 "The gettimeofday() and clock_gettime() syscalls are now available as
  vDSO functions, and Dave added a patch which allows to use NVMe cards
  in the PCI slots as fast and easy alternative to SCSI discs.

  Summary:

   - add gettimeofday() and clock_gettime() vDSO functions

   - enable PCI_MSI_ARCH_FALLBACKS to allow PCI to PCIe bridge adaptor
     with PCIe NVME card to function in parisc machines

   - allow users to reduce kernel unaligned runtime warnings

   - minor code cleanups"

* tag 'parisc-for-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Add support for CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
  parisc: Use max() to calculate parisc_tlb_flush_threshold
  parisc: Fix warning at drivers/pci/msi/msi.h:121
  parisc: Add 64-bit gettimeofday() and clock_gettime() vDSO functions
  parisc: Add 32-bit gettimeofday() and clock_gettime() vDSO functions
  parisc: Clean up unistd.h file

10 months agoMerge tag 'uml-for-linus-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 25 Jul 2024 19:33:08 +0000 (12:33 -0700)]
Merge tag 'uml-for-linus-6.11-rc1' of git://git./linux/kernel/git/uml/linux

Pull UML updates from Richard Weinberger:

 - Support for preemption

 - i386 Rust support

 - Huge cleanup by Benjamin Berg

 - UBSAN support

 - Removal of dead code

* tag 'uml-for-linus-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/uml/linux: (41 commits)
  um: vector: always reset vp->opened
  um: vector: remove vp->lock
  um: register power-off handler
  um: line: always fill *error_out in setup_one_line()
  um: remove pcap driver from documentation
  um: Enable preemption in UML
  um: refactor TLB update handling
  um: simplify and consolidate TLB updates
  um: remove force_flush_all from fork_handler
  um: Do not flush MM in flush_thread
  um: Delay flushing syscalls until the thread is restarted
  um: remove copy_context_skas0
  um: remove LDT support
  um: compress memory related stub syscalls while adding them
  um: Rework syscall handling
  um: Add generic stub_syscall6 function
  um: Create signal stack memory assignment in stub_data
  um: Remove stub-data.h include from common-offsets.h
  um: time-travel: fix signal blocking race/hang
  um: time-travel: remove time_exit()
  ...

10 months agoMerge tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 25 Jul 2024 17:42:22 +0000 (10:42 -0700)]
Merge tag 'driver-core-6.11-rc1' of git://git./linux/kernel/git/gregkh/driver-core

Pull driver core updates from Greg KH:
 "Here is the big set of driver core changes for 6.11-rc1.

  Lots of stuff in here, with not a huge diffstat, but apis are evolving
  which required lots of files to be touched. Highlights of the changes
  in here are:

   - platform remove callback api final fixups (Uwe took many releases
     to get here, finally!)

   - Rust bindings for basic firmware apis and initial driver-core
     interactions.

     It's not all that useful for a "write a whole driver in rust" type
     of thing, but the firmware bindings do help out the phy rust
     drivers, and the driver core bindings give a solid base on which
     others can start their work.

     There is still a long way to go here before we have a multitude of
     rust drivers being added, but it's a great first step.

   - driver core const api changes.

     This reached across all bus types, and there are some fix-ups for
     some not-common bus types that linux-next and 0-day testing shook
     out.

     This work is being done to help make the rust bindings more safe,
     as well as the C code, moving toward the end-goal of allowing us to
     put driver structures into read-only memory. We aren't there yet,
     but are getting closer.

   - minor devres cleanups and fixes found by code inspection

   - arch_topology minor changes

   - other minor driver core cleanups

  All of these have been in linux-next for a very long time with no
  reported problems"

* tag 'driver-core-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits)
  ARM: sa1100: make match function take a const pointer
  sysfs/cpu: Make crash_hotplug attribute world-readable
  dio: Have dio_bus_match() callback take a const *
  zorro: make match function take a const pointer
  driver core: module: make module_[add|remove]_driver take a const *
  driver core: make driver_find_device() take a const *
  driver core: make driver_[create|remove]_file take a const *
  firmware_loader: fix soundness issue in `request_internal`
  firmware_loader: annotate doctests as `no_run`
  devres: Correct code style for functions that return a pointer type
  devres: Initialize an uninitialized struct member
  devres: Fix memory leakage caused by driver API devm_free_percpu()
  devres: Fix devm_krealloc() wasting memory
  driver core: platform: Switch to use kmemdup_array()
  driver core: have match() callback in struct bus_type take a const *
  MAINTAINERS: add Rust device abstractions to DRIVER CORE
  device: rust: improve safety comments
  MAINTAINERS: add Danilo as FIRMWARE LOADER maintainer
  MAINTAINERS: add Rust FW abstractions to FIRMWARE LOADER
  firmware: rust: improve safety comments
  ...

10 months agoMerge tag 'linux-watchdog-6.11-rc1' of git://www.linux-watchdog.org/linux-watchdog
Linus Torvalds [Thu, 25 Jul 2024 17:18:35 +0000 (10:18 -0700)]
Merge tag 'linux-watchdog-6.11-rc1' of git://linux-watchdog.org/linux-watchdog

Pull watchdog updates from Wim Van Sebroeck:

 - make watchdog_class const

 - rework of the rzg2l_wdt driver

 - other small fixes and improvements

* tag 'linux-watchdog-6.11-rc1' of git://www.linux-watchdog.org/linux-watchdog:
  dt-bindings: watchdog: dlg,da9062-watchdog: Drop blank space
  watchdog: rzn1: Convert comma to semicolon
  watchdog: lenovo_se10_wdt: Convert comma to semicolon
  dt-bindings: watchdog: renesas,wdt: Document RZ/G3S support
  watchdog: rzg2l_wdt: Add suspend/resume support
  watchdog: rzg2l_wdt: Rely on the reset driver for doing proper reset
  watchdog: rzg2l_wdt: Remove comparison with zero
  watchdog: rzg2l_wdt: Remove reset de-assert from probe
  watchdog: rzg2l_wdt: Check return status of pm_runtime_put()
  watchdog: rzg2l_wdt: Use pm_runtime_resume_and_get()
  watchdog: rzg2l_wdt: Make the driver depend on PM
  watchdog: rzg2l_wdt: Restrict the driver to ARCH_RZG2L and ARCH_R9A09G011
  watchdog: imx7ulp_wdt: keep already running watchdog enabled
  watchdog: starfive: Add missing clk_disable_unprepare()
  watchdog: Make watchdog_class const

10 months agoMerge tag 'dma-mapping-6.11-2024-07-24' of git://git.infradead.org/users/hch/dma...
Linus Torvalds [Thu, 25 Jul 2024 17:10:34 +0000 (10:10 -0700)]
Merge tag 'dma-mapping-6.11-2024-07-24' of git://git.infradead.org/users/hch/dma-mapping

Pull dma-mapping fix from Christoph Hellwig:

 - fix the order of actions in dmam_free_coherent (Lance Richardson)

* tag 'dma-mapping-6.11-2024-07-24' of git://git.infradead.org/users/hch/dma-mapping:
  dma: fix call order in dmam_free_coherent

10 months agoMerge branch 'tap-tun-harden-by-dropping-short-frame'
Jakub Kicinski [Thu, 25 Jul 2024 15:07:06 +0000 (08:07 -0700)]
Merge branch 'tap-tun-harden-by-dropping-short-frame'

Dongli Zhang says:

====================
tap/tun: harden by dropping short frame

This is to harden all of tap/tun to avoid any short frame smaller than the
Ethernet header (ETH_HLEN).

While the xen-netback already rejects short frame smaller than ETH_HLEN ...

 914 static void xenvif_tx_build_gops(struct xenvif_queue *queue,
 915                                      int budget,
 916                                      unsigned *copy_ops,
 917                                      unsigned *map_ops)
 918 {
... ...
1007                 if (unlikely(txreq.size < ETH_HLEN)) {
1008                         netdev_dbg(queue->vif->dev,
1009                                    "Bad packet size: %d\n", txreq.size);
1010                         xenvif_tx_err(queue, &txreq, extra_count, idx);
1011                         break;
1012                 }

... the short frame may not be dropped by vhost-net/tap/tun.

This fixes CVE-2024-41090 and CVE-2024-41091.
====================

Link: https://patch.msgid.link/20240724170452.16837-1-dongli.zhang@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agotun: add missing verification for short frame
Dongli Zhang [Wed, 24 Jul 2024 17:04:52 +0000 (10:04 -0700)]
tun: add missing verification for short frame

The cited commit missed to check against the validity of the frame length
in the tun_xdp_one() path, which could cause a corrupted skb to be sent
downstack. Even before the skb is transmitted, the
tun_xdp_one-->eth_type_trans() may access the Ethernet header although it
can be less than ETH_HLEN. Once transmitted, this could either cause
out-of-bound access beyond the actual length, or confuse the underlayer
with incorrect or inconsistent header length in the skb metadata.

In the alternative path, tun_get_user() already prohibits short frame which
has the length less than Ethernet header size from being transmitted for
IFF_TAP.

This is to drop any frame shorter than the Ethernet header size just like
how tun_get_user() does.

CVE: CVE-2024-41091
Inspired-by: https://lore.kernel.org/netdev/1717026141-25716-1-git-send-email-si-wei.liu@oracle.com/
Fixes: 043d222f93ab ("tuntap: accept an array of XDP buffs through sendmsg()")
Cc: stable@vger.kernel.org
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Reviewed-by: Si-Wei Liu <si-wei.liu@oracle.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Link: https://patch.msgid.link/20240724170452.16837-3-dongli.zhang@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agotap: add missing verification for short frame
Si-Wei Liu [Wed, 24 Jul 2024 17:04:51 +0000 (10:04 -0700)]
tap: add missing verification for short frame

The cited commit missed to check against the validity of the frame length
in the tap_get_user_xdp() path, which could cause a corrupted skb to be
sent downstack. Even before the skb is transmitted, the
tap_get_user_xdp()-->skb_set_network_header() may assume the size is more
than ETH_HLEN. Once transmitted, this could either cause out-of-bound
access beyond the actual length, or confuse the underlayer with incorrect
or inconsistent header length in the skb metadata.

In the alternative path, tap_get_user() already prohibits short frame which
has the length less than Ethernet header size from being transmitted.

This is to drop any frame shorter than the Ethernet header size just like
how tap_get_user() does.

CVE: CVE-2024-41090
Link: https://lore.kernel.org/netdev/1717026141-25716-1-git-send-email-si-wei.liu@oracle.com/
Fixes: 0efac27791ee ("tap: accept an array of XDP buffs through sendmsg()")
Cc: stable@vger.kernel.org
Signed-off-by: Si-Wei Liu <si-wei.liu@oracle.com>
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Link: https://patch.msgid.link/20240724170452.16837-2-dongli.zhang@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agomISDN: Fix a use after free in hfcmulti_tx()
Dan Carpenter [Wed, 24 Jul 2024 16:08:18 +0000 (11:08 -0500)]
mISDN: Fix a use after free in hfcmulti_tx()

Don't dereference *sp after calling dev_kfree_skb(*sp).

Fixes: af69fb3a8ffa ("Add mISDN HFC multiport driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/8be65f5a-c2dd-4ba0-8a10-bfe5980b8cfb@stanley.mountain
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agogve: Fix an edge case for TSO skb validity check
Bailey Forrest [Wed, 24 Jul 2024 14:34:31 +0000 (07:34 -0700)]
gve: Fix an edge case for TSO skb validity check

The NIC requires each TSO segment to not span more than 10
descriptors. NIC further requires each descriptor to not exceed
16KB - 1 (GVE_TX_MAX_BUF_SIZE_DQO).

The descriptors for an skb are generated by
gve_tx_add_skb_no_copy_dqo() for DQO RDA queue format.
gve_tx_add_skb_no_copy_dqo() loops through each skb frag and
generates a descriptor for the entire frag if the frag size is
not greater than GVE_TX_MAX_BUF_SIZE_DQO. If the frag size is
greater than GVE_TX_MAX_BUF_SIZE_DQO, it is split into descriptor(s)
of size GVE_TX_MAX_BUF_SIZE_DQO and a descriptor is generated for
the remainder (frag size % GVE_TX_MAX_BUF_SIZE_DQO).

gve_can_send_tso() checks if the descriptors thus generated for an
skb would meet the requirement that each TSO-segment not span more
than 10 descriptors. However, the current code misses an edge case
when a TSO segment spans multiple descriptors within a large frag.
This change fixes the edge case.

gve_can_send_tso() relies on the assumption that max gso size (9728)
is less than GVE_TX_MAX_BUF_SIZE_DQO and therefore within an skb
fragment a TSO segment can never span more than 2 descriptors.

Fixes: a57e5de476be ("gve: DQO: Add TX path")
Signed-off-by: Praveen Kaligineedi <pkaligineedi@google.com>
Signed-off-by: Bailey Forrest <bcf@google.com>
Reviewed-by: Jeroen de Borst <jeroendb@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20240724143431.3343722-1-pkaligineedi@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agobnxt_en: update xdp_rxq_info in queue restart logic
Taehee Yoo [Sun, 21 Jul 2024 05:35:54 +0000 (05:35 +0000)]
bnxt_en: update xdp_rxq_info in queue restart logic

When the netdev_rx_queue_restart() restarts queues, the bnxt_en driver
updates(creates and deletes) a page_pool.
But it doesn't update xdp_rxq_info, so the xdp_rxq_info is still
connected to an old page_pool.
So, bnxt_rx_ring_info->page_pool indicates a new page_pool, but
bnxt_rx_ring_info->xdp_rxq is still connected to an old page_pool.

An old page_pool is no longer used so it is supposed to be
deleted by page_pool_destroy() but it isn't.
Because the xdp_rxq_info is holding the reference count for it and the
xdp_rxq_info is not updated, an old page_pool will not be deleted in
the queue restart logic.

Before restarting 1 queue:
./tools/net/ynl/samples/page-pool
enp10s0f1np1[6] page pools: 4 (zombies: 0)
refs: 8192 bytes: 33554432 (refs: 0 bytes: 0)
recycling: 0.0% (alloc: 128:8048 recycle: 0:0)

After restarting 1 queue:
./tools/net/ynl/samples/page-pool
enp10s0f1np1[6] page pools: 5 (zombies: 0)
refs: 10240 bytes: 41943040 (refs: 0 bytes: 0)
recycling: 20.0% (alloc: 160:10080 recycle: 1920:128)

Before restarting queues, an interface has 4 page_pools.
After restarting one queue, an interface has 5 page_pools, but it
should be 4, not 5.
The reason is that queue restarting logic creates a new page_pool and
an old page_pool is not deleted due to the absence of an update of
xdp_rxq_info logic.

Fixes: 2d694c27d32e ("bnxt_en: implement netdev_queue_mgmt_ops")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Reviewed-by: David Wei <dw@davidwei.uk>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Link: https://patch.msgid.link/20240721053554.1233549-1-ap420073@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agoMerge tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
Jakub Kicinski [Thu, 25 Jul 2024 14:40:24 +0000 (07:40 -0700)]
Merge tag 'for-netdev' of https://git./linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2024-07-25

We've added 14 non-merge commits during the last 8 day(s) which contain
a total of 19 files changed, 177 insertions(+), 70 deletions(-).

The main changes are:

1) Fix af_unix to disable MSG_OOB handling for sockets in BPF sockmap and
   BPF sockhash. Also add test coverage for this case, from Michal Luczaj.

2) Fix a segmentation issue when downgrading gso_size in the BPF helper
   bpf_skb_adjust_room(), from Fred Li.

3) Fix a compiler warning in resolve_btfids due to a missing type cast,
   from Liwei Song.

4) Fix stack allocation for arm64 to align the stack pointer at a 16 byte
   boundary in the fexit_sleep BPF selftest, from Puranjay Mohan.

5) Fix a xsk regression to require a flag when actuating tx_metadata_len,
   from Stanislav Fomichev.

6) Fix function prototype BTF dumping in libbpf for prototypes that have
   no input arguments, from Andrii Nakryiko.

7) Fix stacktrace symbol resolution in perf script for BPF programs
   containing subprograms, from Hou Tao.

* tag 'for-netdev' of https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  selftests/bpf: Add XDP_UMEM_TX_METADATA_LEN to XSK TX metadata test
  xsk: Require XDP_UMEM_TX_METADATA_LEN to actuate tx_metadata_len
  bpf: Fix a segment issue when downgrading gso_size
  tools/resolve_btfids: Fix comparison of distinct pointer types warning in resolve_btfids
  bpf, events: Use prog to emit ksymbol event for main program
  selftests/bpf: Test sockmap redirect for AF_UNIX MSG_OOB
  selftests/bpf: Parametrize AF_UNIX redir functions to accept send() flags
  selftests/bpf: Support SOCK_STREAM in unix_inet_redir_to_connected()
  af_unix: Disable MSG_OOB handling for sockets in sockmap/sockhash
  bpftool: Fix typo in usage help
  libbpf: Fix no-args func prototype BTF dumping syntax
  MAINTAINERS: Update powerpc BPF JIT maintainers
  MAINTAINERS: Update email address of Naveen
  selftests/bpf: fexit_sleep: Fix stack allocation for arm64
====================

Link: https://patch.msgid.link/20240725114312.32197-1-daniel@iogearbox.net
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
10 months agotcp: process the 3rd ACK with sk_socket for TFO/MPTCP
Matthieu Baerts (NGI0) [Wed, 24 Jul 2024 10:25:16 +0000 (12:25 +0200)]
tcp: process the 3rd ACK with sk_socket for TFO/MPTCP

The 'Fixes' commit recently changed the behaviour of TCP by skipping the
processing of the 3rd ACK when a sk->sk_socket is set. The goal was to
skip tcp_ack_snd_check() in tcp_rcv_state_process() not to send an
unnecessary ACK in case of simultaneous connect(). Unfortunately, that
had an impact on TFO and MPTCP.

I started to look at the impact on MPTCP, because the MPTCP CI found
some issues with the MPTCP Packetdrill tests [1]. Then Paolo Abeni
suggested me to look at the impact on TFO with "plain" TCP.

For MPTCP, when receiving the 3rd ACK of a request adding a new path
(MP_JOIN), sk->sk_socket will be set, and point to the MPTCP sock that
has been created when the MPTCP connection got established before with
the first path. The newly added 'goto' will then skip the processing of
the segment text (step 7) and not go through tcp_data_queue() where the
MPTCP options are validated, and some actions are triggered, e.g.
sending the MPJ 4th ACK [2] as demonstrated by the new errors when
running a packetdrill test [3] establishing a second subflow.

This doesn't fully break MPTCP, mainly the 4th MPJ ACK that will be
delayed. Still, we don't want to have this behaviour as it delays the
switch to the fully established mode, and invalid MPTCP options in this
3rd ACK will not be caught any more. This modification also affects the
MPTCP + TFO feature as well, and being the reason why the selftests
started to be unstable the last few days [4].

For TFO, the existing 'basic-cookie-not-reqd' test [5] was no longer
passing: if the 3rd ACK contains data, and the connection is accept()ed
before receiving them, these data would no longer be processed, and thus
not ACKed.

One last thing about MPTCP, in case of simultaneous connect(), a
fallback to TCP will be done, which seems fine:

  `../common/defaults.sh`

   0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_MPTCP) = 3
  +0 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)

  +0 > S  0:0(0)                 <mss 1460, sackOK, TS val 100 ecr 0,   nop, wscale 8, mpcapable v1 flags[flag_h] nokey>
  +0 < S  0:0(0) win 1000        <mss 1460, sackOK, TS val 407 ecr 0,   nop, wscale 8, mpcapable v1 flags[flag_h] nokey>
  +0 > S. 0:0(0) ack 1           <mss 1460, sackOK, TS val 330 ecr 0,   nop, wscale 8, mpcapable v1 flags[flag_h] nokey>
  +0 < S. 0:0(0) ack 1 win 65535 <mss 1460, sackOK, TS val 700 ecr 100, nop, wscale 8, mpcapable v1 flags[flag_h] key[skey=2]>
  +0 >  . 1:1(0) ack 1           <nop, nop, TS val 845707014 ecr 700, nop, nop, sack 0:1>

Simultaneous SYN-data crossing is also not supported by TFO, see [6].

Kuniyuki Iwashima suggested to restrict the processing to SYN+ACK only:
that's a more generic solution than the one initially proposed, and
also enough to fix the issues described above.

Later on, Eric Dumazet mentioned that an ACK should still be sent in
reaction to the second SYN+ACK that is received: not sending a DUPACK
here seems wrong and could hurt:

   0 socket(..., SOCK_STREAM|SOCK_NONBLOCK, IPPROTO_TCP) = 3
  +0 connect(3, ..., ...) = -1 EINPROGRESS (Operation now in progress)

  +0 > S  0:0(0)                <mss 1460, sackOK, TS val 1000 ecr 0,nop,wscale 8>
  +0 < S  0:0(0)       win 1000 <mss 1000, sackOK, nop, nop>
  +0 > S. 0:0(0) ack 1          <mss 1460, sackOK, TS val 3308134035 ecr 0,nop,wscale 8>
  +0 < S. 0:0(0) ack 1 win 1000 <mss 1000, sackOK, nop, nop>
  +0 >  . 1:1(0) ack 1          <nop, nop, sack 0:1>  // <== Here

So in this version, the 'goto consume' is dropped, to always send an ACK
when switching from TCP_SYN_RECV to TCP_ESTABLISHED. This ACK will be
seen as a DUPACK -- with DSACK if SACK has been negotiated -- in case of
simultaneous SYN crossing: that's what is expected here.

Link: https://github.com/multipath-tcp/mptcp_net-next/actions/runs/9936227696
Link: https://datatracker.ietf.org/doc/html/rfc8684#fig_tokens
Link: https://github.com/multipath-tcp/packetdrill/blob/mptcp-net-next/gtests/net/mptcp/syscalls/accept.pkt#L28
Link: https://netdev.bots.linux.dev/contest.html?executor=vmksft-mptcp-dbg&test=mptcp-connect-sh
Link: https://github.com/google/packetdrill/blob/master/gtests/net/tcp/fastopen/server/basic-cookie-not-reqd.pkt#L21
Link: https://github.com/google/packetdrill/blob/master/gtests/net/tcp/fastopen/client/simultaneous-fast-open.pkt
Fixes: 23e89e8ee7be ("tcp: Don't drop SYN+ACK for simultaneous connect().")
Suggested-by: Paolo Abeni <pabeni@redhat.com>
Suggested-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Matthieu Baerts (NGI0) <matttbe@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20240724-upstream-net-next-20240716-tcp-3rd-ack-consume-sk_socket-v3-1-d48339764ce9@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
10 months agoselftests/bpf: Add XDP_UMEM_TX_METADATA_LEN to XSK TX metadata test
Stanislav Fomichev [Sat, 13 Jul 2024 01:52:52 +0000 (18:52 -0700)]
selftests/bpf: Add XDP_UMEM_TX_METADATA_LEN to XSK TX metadata test

This flag is now required to use tx_metadata_len.

Fixes: 40808a237d9c ("selftests/bpf: Add TX side to xdp_metadata")
Reported-by: Julian Schindel <mail@arctic-alpaca.de>
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/bpf/20240713015253.121248-3-sdf@fomichev.me
10 months agoxsk: Require XDP_UMEM_TX_METADATA_LEN to actuate tx_metadata_len
Stanislav Fomichev [Sat, 13 Jul 2024 01:52:51 +0000 (18:52 -0700)]
xsk: Require XDP_UMEM_TX_METADATA_LEN to actuate tx_metadata_len

Julian reports that commit 341ac980eab9 ("xsk: Support tx_metadata_len")
can break existing use cases which don't zero-initialize xdp_umem_reg
padding. Introduce new XDP_UMEM_TX_METADATA_LEN to make sure we
interpret the padding as tx_metadata_len only when being explicitly
asked.

Fixes: 341ac980eab9 ("xsk: Support tx_metadata_len")
Reported-by: Julian Schindel <mail@arctic-alpaca.de>
Signed-off-by: Stanislav Fomichev <sdf@fomichev.me>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Link: https://lore.kernel.org/bpf/20240713015253.121248-2-sdf@fomichev.me
10 months agobpf: Fix a segment issue when downgrading gso_size
Fred Li [Fri, 19 Jul 2024 02:46:53 +0000 (10:46 +0800)]
bpf: Fix a segment issue when downgrading gso_size

Linearize the skb when downgrading gso_size because it may trigger a
BUG_ON() later when the skb is segmented as described in [1,2].

Fixes: 2be7e212d5419 ("bpf: add bpf_skb_adjust_room helper")
Signed-off-by: Fred Li <dracodingfly@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/all/20240626065555.35460-2-dracodingfly@gmail.com
Link: https://lore.kernel.org/all/668d5cf1ec330_1c18c32947@willemb.c.googlers.com.notmuch
Link: https://lore.kernel.org/bpf/20240719024653.77006-1-dracodingfly@gmail.com
10 months agonet: mediatek: Fix potential NULL pointer dereference in dummy net_device handling
Breno Leitao [Wed, 24 Jul 2024 08:05:23 +0000 (01:05 -0700)]
net: mediatek: Fix potential NULL pointer dereference in dummy net_device handling

Move the freeing of the dummy net_device from mtk_free_dev() to
mtk_remove().

Previously, if alloc_netdev_dummy() failed in mtk_probe(),
eth->dummy_dev would be NULL. The error path would then call
mtk_free_dev(), which in turn called free_netdev() assuming dummy_dev
was allocated (but it was not), potentially causing a NULL pointer
dereference.

By moving free_netdev() to mtk_remove(), we ensure it's only called when
mtk_probe() has succeeded and dummy_dev is fully allocated. This
addresses a potential NULL pointer dereference detected by Smatch[1].

Fixes: b209bd6d0bff ("net: mediatek: mtk_eth_sock: allocate dummy net_device dynamically")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/all/4160f4e0-cbef-4a22-8b5d-42c4d399e1f7@stanley.mountain/ [1]
Suggested-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20240724080524.2734499-1-leitao@debian.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
10 months agoMerge tag 'nf-24-07-24' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf
Paolo Abeni [Thu, 25 Jul 2024 09:17:21 +0000 (11:17 +0200)]
Merge tag 'nf-24-07-24' of git://git./linux/kernel/git/netfilter/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains a Netfilter fix for net:

Patch #1 if FPU is busy, then pipapo set backend falls back to standard
         set element lookup. Moreover, disable bh while at this.
 From Florian Westphal.

netfilter pull request 24-07-24

* tag 'nf-24-07-24' of git://git.kernel.org/pub/scm/linux/kernel/git/netfilter/nf:
  netfilter: nft_set_pipapo_avx2: disable softinterrupts
====================

Link: https://patch.msgid.link/20240724081305.3152-1-pablo@netfilter.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
10 months agoMerge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net...
Paolo Abeni [Thu, 25 Jul 2024 08:10:05 +0000 (10:10 +0200)]
Merge branch '100GbE' of git://git./linux/kernel/git/tnguy/net-queue

Tony Nguyen says:

====================
This series contains updates to ice driver only.

Ahmed enforces the iavf per VF filter limit on ice (PF) driver to prevent
possible resource exhaustion.

Wojciech corrects assignment of l2 flags read from firmware.

* '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/net-queue:
  ice: Fix recipe read procedure
  ice: Add a per-VF limit on number of FDIR filters
====================

Link: https://patch.msgid.link/20240723233242.3146628-1-anthony.l.nguyen@intel.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
10 months agoMerge tag 'phy-for-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy
Linus Torvalds [Wed, 24 Jul 2024 20:11:28 +0000 (13:11 -0700)]
Merge tag 'phy-for-6.11' of git://git./linux/kernel/git/phy/linux-phy

Pull phy updates from Vinod Koul:
 "New Support
   - Samsung Exynos gs101 drd combo phy
   - Qualcomm SC8180x USB uniphy, IPQ9574 QMP PCIe phy
   - Airoha EN7581 PCIe phy
   - Freescale i.MX8Q HSIO SerDes phy
   - Starfive jh7110 dphy tx

  Updates:
   - Resume support for j721e-wiz driver
   - Updates to Exynos usbdrd driver
   - Support for optional power domains in g12a usb2-phy driver
   - Debugfs support and updates to zynqmp driver"

* tag 'phy-for-6.11' of git://git.kernel.org/pub/scm/linux/kernel/git/phy/linux-phy: (56 commits)
  phy: airoha: Add dtime and Rx AEQ IO registers
  dt-bindings: phy: airoha: Add dtime and Rx AEQ IO registers
  dt-bindings: phy: rockchip-emmc-phy: Convert to dtschema
  dt-bindings: phy: qcom,qmp-usb: fix spelling error
  phy: exynos5-usbdrd: support Exynos USBDRD 3.1 combo phy (HS & SS)
  phy: exynos5-usbdrd: convert Vbus supplies to regulator_bulk
  phy: exynos5-usbdrd: convert (phy) register access clock to clk_bulk
  phy: exynos5-usbdrd: convert core clocks to clk_bulk
  phy: exynos5-usbdrd: support isolating HS and SS ports independently
  dt-bindings: phy: samsung,usb3-drd-phy: add gs101 compatible
  phy: core: Fix documentation of of_phy_get
  phy: starfive: Correct the dphy configure process
  phy: zynqmp: Add debugfs support
  phy: zynqmp: Take the phy mutex in xlate
  phy: zynqmp: Only wait for PLL lock "primary" instances
  phy: zynqmp: Store instance instead of type
  phy: zynqmp: Enable reference clock correctly
  phy: cadence-torrent: Check return value on register read
  phy: Fix the cacography in phy-exynos5250-usb2.c
  phy: phy-rockchip-samsung-hdptx: Select CONFIG_MFD_SYSCON
  ...

10 months agoMerge tag 'soundwire-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul...
Linus Torvalds [Wed, 24 Jul 2024 20:04:43 +0000 (13:04 -0700)]
Merge tag 'soundwire-6.11-rc1' of git://git./linux/kernel/git/vkoul/soundwire

Pull soundwire updates from Vinod Koul:

 - Simplification across subsystem using cleanup.h

 - Support for debugfs to read/write commands

 - Few Intel and Qualcomm driver updates

* tag 'soundwire-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire:
  soundwire: debugfs: simplify with cleanup.h
  soundwire: cadence: simplify with cleanup.h
  soundwire: intel_ace2x: simplify with cleanup.h
  soundwire: intel_ace2x: simplify return path in hw_params
  soundwire: intel: simplify with cleanup.h
  soundwire: intel: simplify return path in hw_params
  soundwire: amd_init: simplify with cleanup.h
  soundwire: amd: simplify with cleanup.h
  soundwire: amd: simplify return path in hw_params
  soundwire: intel_auxdevice: start the bus at default frequency
  soundwire: intel_auxdevice: add cs42l43 codec to wake_capable_list
  drivers:soundwire: qcom: cleanup port maask calculations
  soundwire: bus: simplify by using local slave->prop
  soundwire: generic_bandwidth_allocation: change port_bo parameter to pointer
  soundwire: Intel: clarify Copyright information
  soundwire: intel_ace2.x: add AC timing extensions for PantherLake
  soundwire: bus: add stream refcount
  soundwire: debugfs: add interface to read/write commands

10 months agoMerge tag 'dmaengine-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul...
Linus Torvalds [Wed, 24 Jul 2024 19:34:47 +0000 (12:34 -0700)]
Merge tag 'dmaengine-6.11-rc1' of git://git./linux/kernel/git/vkoul/dmaengine

Pull dmaengine updates from Vinod Koul:
 "New support:

   - New dmaengine_prep_peripheral_dma_vec() to support transfers using
     dma vectors and documentation and user in AXI dma

   - STMicro STM32 DMA3 support and new capabilities of cyclic dma

  Updates:

   - Yaml conversion for Freescale imx dma and qdma bindings,
     sprd sc9860 dma binding

   - Altera msgdma updates for descriptor management"

* tag 'dmaengine-6.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine: (35 commits)
  dt-bindings: fsl-qdma: fix interrupts 'if' check logic
  dt-bindings: dma: sprd,sc9860-dma: convert to YAML
  dmaengine: fsl-dpaa2-qdma: add missing MODULE_DESCRIPTION() macro
  dmaengine: ti: add missing MODULE_DESCRIPTION() macros
  dmaengine: ti: cppi41: add missing MODULE_DESCRIPTION() macro
  dmaengine: virt-dma: add missing MODULE_DESCRIPTION() macro
  dmaengine: ti: k3-udma: Fix BCHAN count with UHC and HC channels
  dmaengine: sh: rz-dmac: Fix lockdep assert warning
  dmaengine: qcom: gpi: clean up the IRQ disable/enable in gpi_reset_chan()
  dmaengine: fsl-edma: change the memory access from local into remote mode in i.MX 8QM
  dmaengine: qcom: gpi: remove unused struct 'reg_info'
  dmaengine: moxart-dma: remove unused struct 'moxart_filter_data'
  dt-bindings: fsl-qdma: Convert to yaml format
  dmaengine: fsl-edma: remove redundant "idle" field from fsl_chan
  dmaengine: fsl-edma: request per-channel IRQ only when channel is allocated
  dmaengine: stm32-dma3: defer channel registration to specify channel name
  dmaengine: add channel device name to channel registration
  dmaengine: stm32-dma3: improve residue granularity
  dmaengine: stm32-dma3: add device_pause and device_resume ops
  dmaengine: stm32-dma3: add DMA_MEMCPY capability
  ...

10 months agosysctl: treewide: constify the ctl_table argument of proc_handlers
Joel Granados [Wed, 24 Jul 2024 18:59:29 +0000 (20:59 +0200)]
sysctl: treewide: constify the ctl_table argument of proc_handlers

const qualify the struct ctl_table argument in the proc_handler function
signatures. This is a prerequisite to moving the static ctl_table
structs into .rodata data which will ensure that proc_handler function
pointers cannot be modified.

This patch has been generated by the following coccinelle script:

```
  virtual patch

  @r1@
  identifier ctl, write, buffer, lenp, ppos;
  identifier func !~ "appldata_(timer|interval)_handler|sched_(rt|rr)_handler|rds_tcp_skbuf_handler|proc_sctp_do_(hmac_alg|rto_min|rto_max|udp_port|alpha_beta|auth|probe_interval)";
  @@

  int func(
  - struct ctl_table *ctl
  + const struct ctl_table *ctl
    ,int write, void *buffer, size_t *lenp, loff_t *ppos);

  @r2@
  identifier func, ctl, write, buffer, lenp, ppos;
  @@

  int func(
  - struct ctl_table *ctl
  + const struct ctl_table *ctl
    ,int write, void *buffer, size_t *lenp, loff_t *ppos)
  { ... }

  @r3@
  identifier func;
  @@

  int func(
  - struct ctl_table *
  + const struct ctl_table *
    ,int , void *, size_t *, loff_t *);

  @r4@
  identifier func, ctl;
  @@

  int func(
  - struct ctl_table *ctl
  + const struct ctl_table *ctl
    ,int , void *, size_t *, loff_t *);

  @r5@
  identifier func, write, buffer, lenp, ppos;
  @@

  int func(
  - struct ctl_table *
  + const struct ctl_table *
    ,int write, void *buffer, size_t *lenp, loff_t *ppos);

```

* Code formatting was adjusted in xfs_sysctl.c to comply with code
  conventions. The xfs_stats_clear_proc_handler,
  xfs_panic_mask_proc_handler and xfs_deprecated_dointvec_minmax where
  adjusted.

* The ctl_table argument in proc_watchdog_common was const qualified.
  This is called from a proc_handler itself and is calling back into
  another proc_handler, making it necessary to change it as part of the
  proc_handler migration.

Co-developed-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Co-developed-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Joel Granados <j.granados@samsung.com>
10 months agoMerge tag 'random-6.11-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 24 Jul 2024 17:29:50 +0000 (10:29 -0700)]
Merge tag 'random-6.11-rc1-for-linus' of git://git./linux/kernel/git/crng/random

Pull random number generator updates from Jason Donenfeld:
 "This adds getrandom() support to the vDSO.

  First, it adds a new kind of mapping to mmap(2), MAP_DROPPABLE, which
  lets the kernel zero out pages anytime under memory pressure, which
  enables allocating memory that never gets swapped to disk but also
  doesn't count as being mlocked.

  Then, the vDSO implementation of getrandom() is introduced in a
  generic manner and hooked into random.c.

  Next, this is implemented on x86. (Also, though it's not ready for
  this pull, somebody has begun an arm64 implementation already)

  Finally, two vDSO selftests are added.

  There are also two housekeeping cleanup commits"

* tag 'random-6.11-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
  MAINTAINERS: add random.h headers to RNG subsection
  random: note that RNDGETPOOL was removed in 2.6.9-rc2
  selftests/vDSO: add tests for vgetrandom
  x86: vdso: Wire up getrandom() vDSO implementation
  random: introduce generic vDSO getrandom() implementation
  mm: add MAP_DROPPABLE for designating always lazily freeable mappings

10 months agoMerge tag 'vfs-6.11-rc1.fixes.2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 24 Jul 2024 16:42:51 +0000 (09:42 -0700)]
Merge tag 'vfs-6.11-rc1.fixes.2' of git://git./linux/kernel/git/vfs/vfs

Pull vfs fixes from Christian Brauner:
 "VFS:

   - The new 64bit mount ids start after the old mount id, i.e., at the
     first non-32 bit value. However, we started counting one id too
     late and thus lost 4294967296 as the first valid id. Fix that.

   - Update a few comments on some vfs_*() creation helpers.

   - Move copying of the xattr name out from the locks required to start
     a filesystem write.

   - Extend the filelock lock UAF fix to the compat code as well.

   - Now that we added the ability to look up an inode under RCU it's
     possible that lockless hash lookup can find and lock an inode after
     it gets I_FREEING set. It then waits until inode teardown in
     evict() is finished.

     The flag however is still set after evict() has woken up all
     waiters. If the inode lock is taken late enough on the waiting side
     after hash removal and wakeup happened the waiting thread will
     never be woken.

     Before RCU based lookup this was synchronized via the
     inode_hash_lock. But since unhashing requires the inode lock as
     well we can check whether the inode is unhashed while holding inode
     lock even without holding inode_hash_lock.

  pidfd:

   - The nsproxy structure contains nearly all of the namespaces
     associated with a task. When a namespace type isn't supported
     nsproxy might contain a NULL pointer or always point to the initial
     namespace type. The logic isn't consistent. So when deriving
     namespace fds we need to ensure that the namespace type is
     supported.

     First, so that we don't risk dereferncing NULL pointers. The
     correct bigger fix would be to change all namespaces to always set
     a valid namespace pointer in struct nsproxy independent of whether
     or not it is compiled in. But that requires quite a few changes.

     Second, so that we don't allow deriving namespace fds when the
     namespace type doesn't exist and thus when they couldn't also be
     derived via /proc/self/ns/.

   - Add missing selftests for the new pidfd ioctls to derive namespace
     fds. This simply extends the already existing testsuite.

  netfs:

   - Fix debug logging and fix kconfig variable name so it actually
     works.

   - Fix writeback that goes both to the server and cache. The streams
     are only activated once a subreq is added. When a server write
     happens the subreq doesn't need to have finished by the time the
     cache write is started. If the server write has already finished by
     the time the cache write is about to start the cache write will
     operate on a folio that might already have been reused. Fix this by
     preactivating the cache write.

   - Limit cachefiles subreq size for cache writes to MAX_RW_COUNT"

* tag 'vfs-6.11-rc1.fixes.2' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs:
  inode: clarify what's locked
  vfs: Fix potential circular locking through setxattr() and removexattr()
  filelock: Fix fcntl/close race recovery compat path
  fs: use all available ids
  cachefiles: Set the max subreq size for cache writes to MAX_RW_COUNT
  netfs: Fix writeback that needs to go to both server and cache
  pidfs: add selftests for new namespace ioctls
  pidfs: handle kernels without namespaces cleanly
  pidfs: when time ns disabled add check for ioctl
  vfs: correct the comments of vfs_*() helpers
  vfs: handle __wait_on_freeing_inode() and evict() race
  netfs: Rename CONFIG_FSCACHE_DEBUG to CONFIG_NETFS_DEBUG
  netfs: Revert "netfs: Switch debug logging to pr_debug()"

10 months agohostfs: fix folio conversion
Linus Torvalds [Wed, 24 Jul 2024 01:14:54 +0000 (18:14 -0700)]
hostfs: fix folio conversion

Commit e3ec0fe944d2 ("hostfs: Convert hostfs_read_folio() to use a
folio") simplified hostfs_read_folio(), but in the process of converting
to using folios natively also mis-used the folio_zero_tail() function
due to the very confusing API of that function.

Very arguably it's folio_zero_tail() API itself that is buggy, since it
would make more sense (and the documentation kind of implies) that the
third argument would be the pointer to the beginning of the folio
buffer.

But no, the third argument to folio_zero_tail() is where we should start
zeroing the tail (even if we already also pass in the offset separately
as the second argument).

So fix the hostfs caller, and we can leave any folio_zero_tail() sanity
cleanup for later.

Reported-and-tested-by: Maciej Żenczykowski <maze@google.com>
Fixes: e3ec0fe944d2 ("hostfs: Convert hostfs_read_folio() to use a folio")
Link: https://lore.kernel.org/all/CANP3RGceNzwdb7w=vPf5=7BCid5HVQDmz1K5kC9JG42+HVAh_g@mail.gmail.com/
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Christian Brauner <brauner@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 months agoMAINTAINERS: make Breno the netconsole maintainer
Jakub Kicinski [Tue, 23 Jul 2024 22:34:05 +0000 (15:34 -0700)]
MAINTAINERS: make Breno the netconsole maintainer

netconsole has no maintainer, and Breno has been working on
improving it consistently for some time. So I think we found
the maintainer :)

Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Breno Leitao <leitao@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agoMAINTAINERS: Update bonding entry
Jay Vosburgh [Tue, 23 Jul 2024 22:22:36 +0000 (15:22 -0700)]
MAINTAINERS: Update bonding entry

Update my email address, clarify support status, and delete the
web site that hasn't been used in a long time.

Signed-off-by: Jay Vosburgh <j.vosburgh@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agonet: nexthop: Initialize all fields in dumped nexthops
Petr Machata [Tue, 23 Jul 2024 16:04:16 +0000 (18:04 +0200)]
net: nexthop: Initialize all fields in dumped nexthops

struct nexthop_grp contains two reserved fields that are not initialized by
nla_put_nh_group(), and carry garbage. This can be observed e.g. with
strace (edited for clarity):

    # ip nexthop add id 1 dev lo
    # ip nexthop add id 101 group 1
    # strace -e recvmsg ip nexthop get id 101
    ...
    recvmsg(... [{nla_len=12, nla_type=NHA_GROUP},
                 [{id=1, weight=0, resvd1=0x69, resvd2=0x67}]] ...) = 52

The fields are reserved and therefore not currently used. But as they are, they
leak kernel memory, and the fact they are not just zero complicates repurposing
of the fields for new ends. Initialize the full structure.

Fixes: 430a049190de ("nexthop: Add support for nexthop groups")
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agonet: stmmac: Correct byte order of perfect_match
Simon Horman [Tue, 23 Jul 2024 13:29:27 +0000 (14:29 +0100)]
net: stmmac: Correct byte order of perfect_match

The perfect_match parameter of the update_vlan_hash operation is __le16,
and is correctly converted from host byte-order in the lone caller,
stmmac_vlan_update().

However, the implementations of this caller, dwxgmac2_update_vlan_hash()
and dwxgmac2_update_vlan_hash(), both treat this parameter as host byte
order, using the following pattern:

u32 value = ...
...
writel(value | perfect_match, ...);

This is not correct because both:
1) value is host byte order; and
2) writel expects a host byte order value as it's first argument

I believe that this will break on big endian systems. And I expect it
has gone unnoticed by only being exercised on little endian systems.

The approach taken by this patch is to update the callback, and it's
caller to simply use a host byte order value.

Flagged by Sparse.
Compile tested only.

Fixes: c7ab0b8088d7 ("net: stmmac: Fallback to VLAN Perfect filtering if HASH is not available")
Signed-off-by: Simon Horman <horms@kernel.org>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agoselftests: forwarding: skip if kernel not support setting bridge fdb learning limit
Hangbin Liu [Tue, 23 Jul 2024 08:22:52 +0000 (16:22 +0800)]
selftests: forwarding: skip if kernel not support setting bridge fdb learning limit

If the testing kernel doesn't support setting fdb_max_learned or show
fdb_n_learned, just skip it. Or we will get errors like

./bridge_fdb_learning_limit.sh: line 218: [: null: integer expression expected
./bridge_fdb_learning_limit.sh: line 225: [: null: integer expression expected

Fixes: 6f84090333bb ("selftests: forwarding: bridge_fdb_learning_limit: Add a new selftest")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: Johannes Nixdorf <jnixdorf-oss@avm.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agotipc: Return non-zero value from tipc_udp_addr2str() on error
Shigeru Yoshida [Tue, 16 Jul 2024 02:09:05 +0000 (11:09 +0900)]
tipc: Return non-zero value from tipc_udp_addr2str() on error

tipc_udp_addr2str() should return non-zero value if the UDP media
address is invalid. Otherwise, a buffer overflow access can occur in
tipc_media_addr_printf(). Fix this by returning 1 on an invalid UDP
media address.

Fixes: d0f91938bede ("tipc: add ip/udp media type")
Signed-off-by: Shigeru Yoshida <syoshida@redhat.com>
Reviewed-by: Tung Nguyen <tung.q.nguyen@endava.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
10 months agoinode: clarify what's locked
Christian Brauner [Wed, 24 Jul 2024 08:50:33 +0000 (10:50 +0200)]
inode: clarify what's locked

In __wait_on_freeing_inode() we warn in case the inode_hash_lock is held
but the inode is unhashed. We then release the inode_lock. So using
"locked" as parameter name is confusing. Use is_inode_hash_locked as
parameter name instead.

Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agovfs: Fix potential circular locking through setxattr() and removexattr()
David Howells [Tue, 23 Jul 2024 08:59:54 +0000 (09:59 +0100)]
vfs: Fix potential circular locking through setxattr() and removexattr()

When using cachefiles, lockdep may emit something similar to the circular
locking dependency notice below.  The problem appears to stem from the
following:

 (1) Cachefiles manipulates xattrs on the files in its cache when called
     from ->writepages().

 (2) The setxattr() and removexattr() system call handlers get the name
     (and value) from userspace after taking the sb_writers lock, putting
     accesses of the vma->vm_lock and mm->mmap_lock inside of that.

 (3) The afs filesystem uses a per-inode lock to prevent multiple
     revalidation RPCs and in writeback vs truncate to prevent parallel
     operations from deadlocking against the server on one side and local
     page locks on the other.

Fix this by moving the getting of the name and value in {get,remove}xattr()
outside of the sb_writers lock.  This also has the minor benefits that we
don't need to reget these in the event of a retry and we never try to take
the sb_writers lock in the event we can't pull the name and value into the
kernel.

Alternative approaches that might fix this include moving the dispatch of a
write to the cache off to a workqueue or trying to do without the
validation lock in afs.  Note that this might also affect other filesystems
that use netfslib and/or cachefiles.

 ======================================================
 WARNING: possible circular locking dependency detected
 6.10.0-build2+ #956 Not tainted
 ------------------------------------------------------
 fsstress/6050 is trying to acquire lock:
 ffff888138fd82f0 (mapping.invalidate_lock#3){++++}-{3:3}, at: filemap_fault+0x26e/0x8b0

 but task is already holding lock:
 ffff888113f26d18 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x165/0x250

 which lock already depends on the new lock.

 the existing dependency chain (in reverse order) is:

 -> #4 (&vma->vm_lock->lock){++++}-{3:3}:
        __lock_acquire+0xaf0/0xd80
        lock_acquire.part.0+0x103/0x280
        down_write+0x3b/0x50
        vma_start_write+0x6b/0xa0
        vma_link+0xcc/0x140
        insert_vm_struct+0xb7/0xf0
        alloc_bprm+0x2c1/0x390
        kernel_execve+0x65/0x1a0
        call_usermodehelper_exec_async+0x14d/0x190
        ret_from_fork+0x24/0x40
        ret_from_fork_asm+0x1a/0x30

 -> #3 (&mm->mmap_lock){++++}-{3:3}:
        __lock_acquire+0xaf0/0xd80
        lock_acquire.part.0+0x103/0x280
        __might_fault+0x7c/0xb0
        strncpy_from_user+0x25/0x160
        removexattr+0x7f/0x100
        __do_sys_fremovexattr+0x7e/0xb0
        do_syscall_64+0x9f/0x100
        entry_SYSCALL_64_after_hwframe+0x76/0x7e

 -> #2 (sb_writers#14){.+.+}-{0:0}:
        __lock_acquire+0xaf0/0xd80
        lock_acquire.part.0+0x103/0x280
        percpu_down_read+0x3c/0x90
        vfs_iocb_iter_write+0xe9/0x1d0
        __cachefiles_write+0x367/0x430
        cachefiles_issue_write+0x299/0x2f0
        netfs_advance_write+0x117/0x140
        netfs_write_folio.isra.0+0x5ca/0x6e0
        netfs_writepages+0x230/0x2f0
        afs_writepages+0x4d/0x70
        do_writepages+0x1e8/0x3e0
        filemap_fdatawrite_wbc+0x84/0xa0
        __filemap_fdatawrite_range+0xa8/0xf0
        file_write_and_wait_range+0x59/0x90
        afs_release+0x10f/0x270
        __fput+0x25f/0x3d0
        __do_sys_close+0x43/0x70
        do_syscall_64+0x9f/0x100
        entry_SYSCALL_64_after_hwframe+0x76/0x7e

 -> #1 (&vnode->validate_lock){++++}-{3:3}:
        __lock_acquire+0xaf0/0xd80
        lock_acquire.part.0+0x103/0x280
        down_read+0x95/0x200
        afs_writepages+0x37/0x70
        do_writepages+0x1e8/0x3e0
        filemap_fdatawrite_wbc+0x84/0xa0
        filemap_invalidate_inode+0x167/0x1e0
        netfs_unbuffered_write_iter+0x1bd/0x2d0
        vfs_write+0x22e/0x320
        ksys_write+0xbc/0x130
        do_syscall_64+0x9f/0x100
        entry_SYSCALL_64_after_hwframe+0x76/0x7e

 -> #0 (mapping.invalidate_lock#3){++++}-{3:3}:
        check_noncircular+0x119/0x160
        check_prev_add+0x195/0x430
        __lock_acquire+0xaf0/0xd80
        lock_acquire.part.0+0x103/0x280
        down_read+0x95/0x200
        filemap_fault+0x26e/0x8b0
        __do_fault+0x57/0xd0
        do_pte_missing+0x23b/0x320
        __handle_mm_fault+0x2d4/0x320
        handle_mm_fault+0x14f/0x260
        do_user_addr_fault+0x2a2/0x500
        exc_page_fault+0x71/0x90
        asm_exc_page_fault+0x22/0x30

 other info that might help us debug this:

 Chain exists of:
   mapping.invalidate_lock#3 --> &mm->mmap_lock --> &vma->vm_lock->lock

  Possible unsafe locking scenario:

        CPU0                    CPU1
        ----                    ----
   rlock(&vma->vm_lock->lock);
                                lock(&mm->mmap_lock);
                                lock(&vma->vm_lock->lock);
   rlock(mapping.invalidate_lock#3);

  *** DEADLOCK ***

 1 lock held by fsstress/6050:
  #0: ffff888113f26d18 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x165/0x250

 stack backtrace:
 CPU: 0 PID: 6050 Comm: fsstress Not tainted 6.10.0-build2+ #956
 Hardware name: ASUS All Series/H97-PLUS, BIOS 2306 10/09/2014
 Call Trace:
  <TASK>
  dump_stack_lvl+0x57/0x80
  check_noncircular+0x119/0x160
  ? queued_spin_lock_slowpath+0x4be/0x510
  ? __pfx_check_noncircular+0x10/0x10
  ? __pfx_queued_spin_lock_slowpath+0x10/0x10
  ? mark_lock+0x47/0x160
  ? init_chain_block+0x9c/0xc0
  ? add_chain_block+0x84/0xf0
  check_prev_add+0x195/0x430
  __lock_acquire+0xaf0/0xd80
  ? __pfx___lock_acquire+0x10/0x10
  ? __lock_release.isra.0+0x13b/0x230
  lock_acquire.part.0+0x103/0x280
  ? filemap_fault+0x26e/0x8b0
  ? __pfx_lock_acquire.part.0+0x10/0x10
  ? rcu_is_watching+0x34/0x60
  ? lock_acquire+0xd7/0x120
  down_read+0x95/0x200
  ? filemap_fault+0x26e/0x8b0
  ? __pfx_down_read+0x10/0x10
  ? __filemap_get_folio+0x25/0x1a0
  filemap_fault+0x26e/0x8b0
  ? __pfx_filemap_fault+0x10/0x10
  ? find_held_lock+0x7c/0x90
  ? __pfx___lock_release.isra.0+0x10/0x10
  ? __pte_offset_map+0x99/0x110
  __do_fault+0x57/0xd0
  do_pte_missing+0x23b/0x320
  __handle_mm_fault+0x2d4/0x320
  ? __pfx___handle_mm_fault+0x10/0x10
  handle_mm_fault+0x14f/0x260
  do_user_addr_fault+0x2a2/0x500
  exc_page_fault+0x71/0x90
  asm_exc_page_fault+0x22/0x30

Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/2136178.1721725194@warthog.procyon.org.uk
cc: Alexander Viro <viro@zeniv.linux.org.uk>
cc: Christian Brauner <brauner@kernel.org>
cc: Jan Kara <jack@suse.cz>
cc: Jeff Layton <jlayton@kernel.org>
cc: Gao Xiang <xiang@kernel.org>
cc: Matthew Wilcox <willy@infradead.org>
cc: netfs@lists.linux.dev
cc: linux-erofs@lists.ozlabs.org
cc: linux-fsdevel@vger.kernel.org
[brauner: fix minor issues]
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agofilelock: Fix fcntl/close race recovery compat path
Jann Horn [Tue, 23 Jul 2024 15:03:56 +0000 (17:03 +0200)]
filelock: Fix fcntl/close race recovery compat path

When I wrote commit 3cad1bc01041 ("filelock: Remove locks reliably when
fcntl/close race is detected"), I missed that there are two copies of the
code I was patching: The normal version, and the version for 64-bit offsets
on 32-bit kernels.
Thanks to Greg KH for stumbling over this while doing the stable
backport...

Apply exactly the same fix to the compat path for 32-bit kernels.

Fixes: c293621bbf67 ("[PATCH] stale POSIX lock handling")
Cc: stable@kernel.org
Link: https://bugs.chromium.org/p/project-zero/issues/detail?id=2563
Signed-off-by: Jann Horn <jannh@google.com>
Link: https://lore.kernel.org/r/20240723-fs-lock-recover-compatfix-v1-1-148096719529@google.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agofs: use all available ids
Christian Brauner [Fri, 19 Jul 2024 11:41:48 +0000 (13:41 +0200)]
fs: use all available ids

The counter is unconditionally incremented for each mount allocation.
If we set it to 1ULL << 32 we're losing 4294967296 as the first valid
non-32 bit mount id.

Link: https://lore.kernel.org/r/20240719-work-mount-namespace-v1-1-834113cab0d2@kernel.org
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agocachefiles: Set the max subreq size for cache writes to MAX_RW_COUNT
David Howells [Fri, 19 Jul 2024 14:19:02 +0000 (15:19 +0100)]
cachefiles: Set the max subreq size for cache writes to MAX_RW_COUNT

Set the maximum size of a subrequest that writes to cachefiles to be
MAX_RW_COUNT so that we don't overrun the maximum write we can make to the
backing filesystem.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/1599005.1721398742@warthog.procyon.org.uk
cc: Jeff Layton <jlayton@kernel.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agonetfs: Fix writeback that needs to go to both server and cache
David Howells [Fri, 19 Jul 2024 14:20:18 +0000 (15:20 +0100)]
netfs: Fix writeback that needs to go to both server and cache

When netfslib is performing writeback (ie. ->writepages), it maintains two
parallel streams of writes, one to the server and one to the cache, but it
doesn't mark either stream of writes as active until it gets some data that
needs to be written to that stream.

This is done because some folios will only be written to the cache
(e.g. copying to the cache on read is done by marking the folios and
letting writeback do the actual work) and sometimes we'll only be writing
to the server (e.g. if there's no cache).

Now, since we don't actually dispatch uploads and cache writes in parallel,
but rather flip between the streams, depending on which has the lowest
so-far-issued offset, and don't wait for the subreqs to finish before
flipping, we can end up in a situation where, say, we issue a write to the
server and this completes before we start the write to the cache.

But because we only activate a stream when we first add a subreq to it, the
result collection code may run before we manage to activate the stream -
resulting in the folio being cleaned and having the writeback-in-progress
mark removed.  At this point, the folio no longer belongs to us.

This is only really a problem for folios that need to be written to both
streams - and in that case, the upload to the server is started first,
followed by the write to the cache - and the cache write may see a bad
folio.

Fix this by activating the cache stream up front if there's a cache
available.  If there's a cache, then all data is going to be written to it.

Fixes: 288ace2f57c9 ("netfs: New writeback implementation")
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/1599053.1721398818@warthog.procyon.org.uk
cc: Jeff Layton <jlayton@kernel.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agopidfs: add selftests for new namespace ioctls
Christian Brauner [Mon, 22 Jul 2024 13:13:55 +0000 (15:13 +0200)]
pidfs: add selftests for new namespace ioctls

Add selftests to verify that deriving namespace file descriptors from
pidfd file descriptors works correctly.

Link: https://lore.kernel.org/r/20240722-work-pidfs-69dbea91edab@brauner
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agopidfs: handle kernels without namespaces cleanly
Christian Brauner [Mon, 22 Jul 2024 13:13:54 +0000 (15:13 +0200)]
pidfs: handle kernels without namespaces cleanly

The nsproxy structure contains nearly all of the namespaces associated
with a task. When a given namespace type is not supported by this kernel
the rules whether the corresponding pointer in struct nsproxy is NULL or
always init_<ns_type>_ns differ per namespace. Ideally, that wouldn't be
the case and for all namespace types we'd always set it to
init_<ns_type>_ns when the corresponding namespace type isn't supported.

Make sure we handle all namespaces where the pointer in struct nsproxy
can be NULL when the namespace type isn't supported.

Link: https://lore.kernel.org/r/20240722-work-pidfs-e6a83030f63e@brauner
Fixes: 5b08bd408534 ("pidfs: allow retrieval of namespace file descriptors") # mainline only
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agopidfs: when time ns disabled add check for ioctl
Edward Adam Davis [Sun, 21 Jul 2024 06:23:12 +0000 (14:23 +0800)]
pidfs: when time ns disabled add check for ioctl

syzbot call pidfd_ioctl() with cmd "PIDFD_GET_TIME_NAMESPACE" and disabled
CONFIG_TIME_NS, since time_ns is NULL, it will make NULL ponter deref in
open_namespace.

Fixes: 5b08bd408534 ("pidfs: allow retrieval of namespace file descriptors") # mainline only
Reported-and-tested-by: syzbot+34a0ee986f61f15da35d@syzkaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=34a0ee986f61f15da35d
Signed-off-by: Edward Adam Davis <eadavis@qq.com>
Link: https://lore.kernel.org/r/tencent_7FAE8DB725EE0DD69236DDABDDDE195E4F07@qq.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agovfs: correct the comments of vfs_*() helpers
Congjie Zhou [Thu, 18 Jul 2024 16:25:45 +0000 (00:25 +0800)]
vfs: correct the comments of vfs_*() helpers

correct the comments of vfs_*() helpers in fs/namei.c, including:
1. vfs_create()
2. vfs_mknod()
3. vfs_mkdir()
4. vfs_rmdir()
5. vfs_symlink()

All of them come from the same commit:
6521f8917082 "namei: prepare for idmapped mounts"

The @dentry is actually the dentry of child directory rather than
base directory(parent directory), and thus the @dir has to be
modified due to the change of @dentry.

Signed-off-by: Congjie Zhou <zcjie0802@qq.com>
Link: https://lore.kernel.org/r/tencent_2FCF6CC9E10DC8A27AE58A5A0FE4FCE96D0A@qq.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agovfs: handle __wait_on_freeing_inode() and evict() race
Mateusz Guzik [Thu, 18 Jul 2024 15:18:37 +0000 (17:18 +0200)]
vfs: handle __wait_on_freeing_inode() and evict() race

Lockless hash lookup can find and lock the inode after it gets the
I_FREEING flag set, at which point it blocks waiting for teardown in
evict() to finish.

However, the flag is still set even after evict() wakes up all waiters.

This results in a race where if the inode lock is taken late enough, it
can happen after both hash removal and wakeups, meaning there is nobody
to wake the racing thread up.

This worked prior to RCU-based lookup because the entire ordeal was
synchronized with the inode hash lock.

Since unhashing requires the inode lock, we can safely check whether it
happened after acquiring it.

Link: https://lore.kernel.org/v9fs/20240717102458.649b60be@kernel.org/
Reported-by: Dominique Martinet <asmadeus@codewreck.org>
Fixes: 7180f8d91fcb ("vfs: add rcu-based find_inode variants for iget ops")
Signed-off-by: Mateusz Guzik <mjguzik@gmail.com>
Link: https://lore.kernel.org/r/20240718151838.611807-1-mjguzik@gmail.com
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agonetfs: Rename CONFIG_FSCACHE_DEBUG to CONFIG_NETFS_DEBUG
David Howells [Thu, 18 Jul 2024 20:10:06 +0000 (21:10 +0100)]
netfs: Rename CONFIG_FSCACHE_DEBUG to CONFIG_NETFS_DEBUG

CONFIG_FSCACHE_DEBUG should have been renamed to CONFIG_NETFS_DEBUG, so do
that now.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/1410796.1721333406@warthog.procyon.org.uk
cc: Uwe Kleine-König <ukleinek@kernel.org>
cc: Christian Brauner <brauner@kernel.org>
cc: Jeff Layton <jlayton@kernel.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agonetfs: Revert "netfs: Switch debug logging to pr_debug()"
David Howells [Thu, 18 Jul 2024 20:07:32 +0000 (21:07 +0100)]
netfs: Revert "netfs: Switch debug logging to pr_debug()"

Revert commit 163eae0fb0d4c610c59a8de38040f8e12f89fd43 to get back the
original operation of the debugging macros.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://lore.kernel.org/r/20240608151352.22860-2-ukleinek@kernel.org
Link: https://lore.kernel.org/r/1410685.1721333252@warthog.procyon.org.uk
cc: Uwe Kleine-König <ukleinek@kernel.org>
cc: Christian Brauner <brauner@kernel.org>
cc: Jeff Layton <jlayton@kernel.org>
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
10 months agonetfilter: nft_set_pipapo_avx2: disable softinterrupts
Florian Westphal [Fri, 19 Jul 2024 11:19:26 +0000 (13:19 +0200)]
netfilter: nft_set_pipapo_avx2: disable softinterrupts

We need to disable softinterrupts, else we get following problem:

1. pipapo_avx2 called from process context; fpu usable
2. preempt_disable() called, pcpu scratchmap in use
3. softirq handles rx or tx, we re-enter pipapo_avx2
4. fpu busy, fallback to generic non-avx version
5. fallback reuses scratch map and index, which are in use
   by the preempted process

Handle this same way as generic version by first disabling
softinterrupts while the scratchmap is in use.

Fixes: f0b3d338064e ("netfilter: nft_set_pipapo_avx2: Add irq_fpu_usable() check, fallback to non-AVX2 version")
Cc: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>