Messages in this thread Patch in this message | | | Date | Sat, 14 Jan 2017 12:18:55 -0800 | From | Basil Gunn <> | Subject | [PATCH 1/1] ax25: Fix segfault after sock connection timeout |
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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> ---
diff --git a/net/ax25/ax25_subr.c b/net/ax25/ax25_subr.c index 4855d18..038b109 100644 --- a/net/ax25/ax25_subr.c +++ b/net/ax25/ax25_subr.c @@ -264,7 +264,7 @@ void ax25_disconnect(ax25_cb *ax25, int reason) { ax25_clear_queues(ax25);
- if (!sock_flag(ax25->sk, SOCK_DESTROY)) + if (!ax25->sk || !sock_flag(ax25->sk, SOCK_DESTROY)) ax25_stop_heartbeat(ax25); ax25_stop_t1timer(ax25); ax25_stop_t2timer(ax25);
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