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ax25: Fix segfault after sock connection timeout
The ax.25 socket connection timed out & the sock struct has been previously taken down ie. sock struct is now a NULL pointer. Checking the sock_flag causes the segfault. Check if the socket struct pointer is NULL before checking sock_flag. This segfault is seen in timed out netrom connections. Please submit to -stable. Signed-off-by: Basil Gunn <basil@pacabunga.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -264,7 +264,7 @@ void ax25_disconnect(ax25_cb *ax25, int reason)
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{
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ax25_clear_queues(ax25);
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if (!sock_flag(ax25->sk, SOCK_DESTROY))
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if (!ax25->sk || !sock_flag(ax25->sk, SOCK_DESTROY))
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ax25_stop_heartbeat(ax25);
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ax25_stop_t1timer(ax25);
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ax25_stop_t2timer(ax25);
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