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(parent: becbd58) | patch
arp: use RCU protection in arp_xmit()
authorEric Dumazet <edumazet@google.com>
Fri, 7 Feb 2025 13:58:36 +0000 (13:58 +0000)
committerJakub Kicinski <kuba@kernel.org>
Tue, 11 Feb 2025 02:09:09 +0000 (18:09 -0800)
commita42b69f692165ec39db42d595f4f65a4c8f42e44
tree595c21de7998c410a6e3f02ab7ebfa79e0b559b2tree
parentbecbd5850c03ed33b232083dd66c6e38c0c0e569commit | diff
arp: use RCU protection in arp_xmit()

arp_xmit() can be called without RTNL or RCU protection.

Use RCU protection to avoid potential UAF.

Fixes: 29a26a568038 ("netfilter: Pass struct net into the netfilter hooks")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250207135841.1948589-5-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
net/ipv4/arp.c diff | blob | history
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