smc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().

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[ Upstream commit 235f81045c ]

smc_clc_prfx_match() is called from smc_listen_work() and
not under RCU nor RTNL.

Using sk_dst_get(sk)->dev could trigger UAF.

Let's use __sk_dst_get() and dst_dev_rcu().

Note that the returned value of smc_clc_prfx_match() is not
used in the caller.

Fixes: a046d57da1 ("smc: CLC handshake (incl. preparation steps)")
Signed-off-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250916214758.650211-4-kuniyu@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Kuniyuki Iwashima 2025-09-16 21:47:21 +00:00 • committed by Greg Kroah-Hartman

parent 0736993bfe

commit d26e80f7fb

1 changed files with 13 additions and 13 deletions

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net/smc/smc_clc.c

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