arp: use RCU protection in arp_xmit()

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[ Upstream commit a42b69f692 ]

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

Use RCU protection to avoid potential UAF.

Fixes: 29a26a5680 ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Eric Dumazet 2025-02-07 13:58:36 +00:00 • committed by Greg Kroah-Hartman

parent 40d8f2f2a3

commit d9366ac2f9

1 changed files with 3 additions and 1 deletions

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net/ipv4/arp.c

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