udp: move udp->no_check6_rx to udp->udp_flags

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[ Upstream commit bcbc1b1de8 ]

syzbot reported that udp->no_check6_rx can be read locklessly.
Use one atomic bit from udp->udp_flags.

Fixes: 1c19448c9b ("net: Make enabling of zero UDP6 csums more restrictive")
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Eric Dumazet 2023-09-12 09:17:23 +00:00 • committed by Greg Kroah-Hartman

parent 50e41aa9ea

commit a01cff15cc

3 changed files with 10 additions and 10 deletions

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10

include/linux/udp.h

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4

net/ipv4/udp.c

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6

net/ipv6/udp.c

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