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(parent: 95724fe) | patch
udp: Fix a data-race around sysctl_udp_l3mdev_accept.
authorKuniyuki Iwashima <kuniyu@amazon.com>
Mon, 18 Jul 2022 17:26:43 +0000 (10:26 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 29 Jul 2022 15:25:22 +0000 (17:25 +0200)
commit3f2ac2d6511bb0652abf4d7388d65bb9ff1c641c
tree3d334fde9e462c57e9b748bff35db69587e5b09atree | snapshot
parent95724fe897a4ecf2be51452ef96e818568071664commit | diff
udp: Fix a data-race around sysctl_udp_l3mdev_accept.

[ Upstream commit 3d72bb4188c708bb16758c60822fc4dda7a95174 ]

While reading sysctl_udp_l3mdev_accept, it can be changed concurrently.
Thus, we need to add READ_ONCE() to its reader.

Fixes: 63a6fff353d0 ("net: Avoid receiving packets with an l3mdev on unbound UDP sockets")
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
include/net/udp.h diff | blob | history
Domain: System / Kernel;