net/smc: no shutdown in state SMC_LISTEN
commit caa21e19e0
upstream.
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: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
parent
9e9f27e0d7
commit
3f59cf41fb
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@ -1180,8 +1180,7 @@ static int smc_shutdown(struct socket *sock, int how)
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lock_sock(sk);
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rc = -ENOTCONN;
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if ((sk->sk_state != SMC_LISTEN) &&
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(sk->sk_state != SMC_ACTIVE) &&
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if ((sk->sk_state != SMC_ACTIVE) &&
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(sk->sk_state != SMC_PEERCLOSEWAIT1) &&
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(sk->sk_state != SMC_PEERCLOSEWAIT2) &&
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(sk->sk_state != SMC_APPCLOSEWAIT1) &&
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