udp: move udp->gro_enabled to udp->udp_flags

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[ Upstream commit e1dc0615c6 ]

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

Fixes: e20cf8d3f1 ("udp: implement GRO for plain UDP sockets.")
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 09:17:24 +00:00 • committed by Greg Kroah-Hartman

parent a01cff15cc

commit 753886c0b9

4 changed files with 7 additions and 7 deletions

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2

include/linux/udp.h

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6

net/ipv4/udp.c

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4

net/ipv4/udp_offload.c

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2

net/ipv6/udp.c

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