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Commit caa21e19 authored by Ursula Braun's avatar Ursula Braun Committed by David S. Miller
Browse files

net/smc: no shutdown in state SMC_LISTEN 



Invoking shutdown for a socket in state SMC_LISTEN does not make
sense. Nevertheless programs like syzbot fuzzing the kernel may
try to do this. For SMC this means a socket refcounting problem.
This patch makes sure a shutdown call for an SMC socket in state
SMC_LISTEN simply returns with -ENOTCONN.

Signed-off-by: default avatarUrsula Braun <ubraun@linux.ibm.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 11ba961c

net/smc/af_smc.c

+1 −2
Original line number Diff line number Diff line
@@ -1397,8 +1397,7 @@ static int smc_shutdown(struct socket *sock, int how) 
	lock_sock(sk);



	rc = -ENOTCONN;

	if ((sk->sk_state != SMC_LISTEN) &&

	    (sk->sk_state != SMC_ACTIVE) &&

	if ((sk->sk_state != SMC_ACTIVE) &&

	    (sk->sk_state != SMC_PEERCLOSEWAIT1) &&

	    (sk->sk_state != SMC_PEERCLOSEWAIT2) &&

	    (sk->sk_state != SMC_APPCLOSEWAIT1) &&