Re: [PATCH] tipc: fix RCU dereference race in tipc_aead_users_dec()
From: Eric Dumazet <edumazet@google.com>
Date: 2026-02-01 09:48:17
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On Sun, Feb 1, 2026 at 3:31 AM Daniel Hodges [off-list ref] wrote:
tipc_aead_users_dec() calls rcu_dereference(aead) twice: once to store
in 'tmp' for the NULL check, and again inside the atomic_add_unless()
call.
Use the already-dereferenced 'tmp' pointer consistently, matching the
correct pattern used in tipc_aead_users_inc() and tipc_aead_users_set().
Fixes: fc1b6d6de220 ("tipc: introduce TIPC encryption & authentication")
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Hodges <redacted>Reviewed-by: Eric Dumazet <edumazet@google.com>