ipv6: use RCU in ip6_output()

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[ Upstream commit 11709573cc ]

Use RCU in ip6_output() in order to use dst_dev_rcu() to prevent
possible UAF.

We can remove rcu_read_lock()/rcu_read_unlock() pairs
from ip6_finish_output2().

Fixes: 4a6ce2b6f2 ("net: introduce a new function dst_dev_put()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://patch.msgid.link/20250828195823.3958522-5-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 2025-08-28 19:58:19 +00:00 • committed by Greg Kroah-Hartman

parent f7f9e924f2

commit 0393f85c32

1 changed files with 15 additions and 14 deletions

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net/ipv6/ip6_output.c

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