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| author | Basil Gunn <basil@pacabunga.com> | 2017-01-14 23:18:55 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-02-04 11:45:09 +0300 |
| commit | 4f5e54bdd052cb7b6f754d6e4ced0367b11af3ed (patch) | |
| tree | 1572752aeb627117b7b6a82a437ac5126aa8c3bd | |
| parent | 062b7f35ff6caf2f4ed0ee99926944aad1e1ceb1 (diff) | |
| download | linux-4f5e54bdd052cb7b6f754d6e4ced0367b11af3ed.tar.xz | |
ax25: Fix segfault after sock connection timeout
[ Upstream commit 8a367e74c0120ef68c8c70d5a025648c96626dff ]
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | net/ax25/ax25_subr.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ax25/ax25_subr.c b/net/ax25/ax25_subr.c index 655a7d4c96e1..983f0b5e14f1 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); |