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charset="utf-8" The mptcp_data_lock/unlock(sk) functions are taking the same spin lock as the lock_sock()/release_sock() functions. So we're already holding the lock at this point and taking it again will lead to a deadlock. Fixes: 4293248c6704 ("mptcp: add data lock for sk timers") Signed-off-by: Dan Carpenter --- From static analysis. Not tested. net/mptcp/protocol.c | 2 -- 1 file changed, 2 deletions(-) diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c index a5d466e6b538..eef4673dae3a 100644 --- a/net/mptcp/protocol.c +++ b/net/mptcp/protocol.c @@ -2872,9 +2872,7 @@ static void mptcp_close(struct sock *sk, long timeout) __mptcp_destroy_sock(sk); do_cancel_work =3D true; } else { - mptcp_data_lock(sk); sk_reset_timer(sk, &sk->sk_timer, jiffies + TCP_TIMEWAIT_LEN); - mptcp_data_unlock(sk); } release_sock(sk); if (do_cancel_work) --=20 2.35.1