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AX.25: Close socket connection on session completion 

A socket connection made in ax.25 is not closed when session is
completed.  The heartbeat timer is stopped prematurely and this is
where the socket gets closed. Allow heatbeat timer to run to close
socket. Symptom occurs in kernels >= 4.2.0

Originally sent 6/15/2016. Resend with distribution list matching
scripts/maintainer.pl output.

Signed-off-by: Basil Gunn <basil@pacabunga.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Basil Gunn 2016-06-16 09:42:30 -07:00 committed by David S. Miller
parent 3bb549ae4c
commit 4a7d99ea1b
4 changed files with 12 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
net/ax25/af_ax25.c
View File

@ -976,7 +976,8 @@ static int ax25_release(struct socket *sock)
release_sock(sk);
ax25_disconnect(ax25, 0);
lock_sock(sk);
ax25_destroy_socket(ax25);
if (!sock_flag(ax25->sk, SOCK_DESTROY))
ax25_destroy_socket(ax25);
break;
case AX25_STATE_3:

5
net/ax25/ax25_ds_timer.c
View File

@ -102,6 +102,7 @@ void ax25_ds_heartbeat_expiry(ax25_cb *ax25)
switch (ax25->state) {
case AX25_STATE_0:
case AX25_STATE_2:
/* Magic here: If we listen() and a new link dies before it
is accepted() it isn't 'dead' so doesn't get removed. */
if (!sk || sock_flag(sk, SOCK_DESTROY) ||
@ -111,6 +112,7 @@ void ax25_ds_heartbeat_expiry(ax25_cb *ax25)
sock_hold(sk);
ax25_destroy_socket(ax25);
bh_unlock_sock(sk);
/* Ungrab socket and destroy it */
sock_put(sk);
} else
ax25_destroy_socket(ax25);
@ -213,7 +215,8 @@ void ax25_ds_t1_timeout(ax25_cb *ax25)
case AX25_STATE_2:
if (ax25->n2count == ax25->n2) {
ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
ax25_disconnect(ax25, ETIMEDOUT);
if (!sock_flag(ax25->sk, SOCK_DESTROY))
ax25_disconnect(ax25, ETIMEDOUT);
return;
} else {
ax25->n2count++;

5
net/ax25/ax25_std_timer.c
View File

@ -38,6 +38,7 @@ void ax25_std_heartbeat_expiry(ax25_cb *ax25)
switch (ax25->state) {
case AX25_STATE_0:
case AX25_STATE_2:
/* Magic here: If we listen() and a new link dies before it
is accepted() it isn't 'dead' so doesn't get removed. */
if (!sk || sock_flag(sk, SOCK_DESTROY) ||
@ -47,6 +48,7 @@ void ax25_std_heartbeat_expiry(ax25_cb *ax25)
sock_hold(sk);
ax25_destroy_socket(ax25);
bh_unlock_sock(sk);
/* Ungrab socket and destroy it */
sock_put(sk);
} else
ax25_destroy_socket(ax25);
@ -144,7 +146,8 @@ void ax25_std_t1timer_expiry(ax25_cb *ax25)
case AX25_STATE_2:
if (ax25->n2count == ax25->n2) {
ax25_send_control(ax25, AX25_DISC, AX25_POLLON, AX25_COMMAND);
ax25_disconnect(ax25, ETIMEDOUT);
if (!sock_flag(ax25->sk, SOCK_DESTROY))
ax25_disconnect(ax25, ETIMEDOUT);
return;
} else {
ax25->n2count++;

3
net/ax25/ax25_subr.c
View File

@ -264,7 +264,8 @@ void ax25_disconnect(ax25_cb *ax25, int reason)
{
ax25_clear_queues(ax25);
ax25_stop_heartbeat(ax25);
if (!sock_flag(ax25->sk, SOCK_DESTROY))
ax25_stop_heartbeat(ax25);
ax25_stop_t1timer(ax25);
ax25_stop_t2timer(ax25);
ax25_stop_t3timer(ax25);