udplite: fix NULL pointer dereference
authorPaolo Abeni <pabeni@redhat.com>
Tue, 15 Nov 2016 15:37:53 +0000 (16:37 +0100)
committerDavid S. Miller <davem@davemloft.net>
Tue, 15 Nov 2016 16:59:38 +0000 (11:59 -0500)
commitc915fe13cbaae5c7aa7b44f367d05addd60c9008
treeb887552a905b9a209b9f800977027b9b8219f37e
parente6ca4f16a6950537132d0752581c967df2d911c4
udplite: fix NULL pointer dereference

The commit 850cbaddb52d ("udp: use it's own memory accounting schema")
assumes that the socket proto has memory accounting enabled,
but this is not the case for UDPLITE.
Fix it enabling memory accounting for UDPLITE and performing
fwd allocated memory reclaiming on socket shutdown.
UDP and UDPLITE share now the same memory accounting limits.
Also drop the backlog receive operation, since is no more needed.

Fixes: 850cbaddb52d ("udp: use it's own memory accounting schema")
Reported-by: Andrei Vagin <avagin@gmail.com>
Suggested-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/udp.h
include/net/udplite.h
net/ipv4/udp.c
net/ipv4/udplite.c
net/ipv6/udplite.c