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vnc_refresh: return if vd->timer is NULL

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Hi all,
calling vnc_update_client in vnc_refresh might have the unlikely side
effect of setting vd->timer = NULL, if the last vnc client disconnected.
In this case we have to return from vnc_refresh without updating the
timer, otherwise we cause a segfault.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Stefano Stabellini 2010-01-11 17:30:50 +00:00 • committed by Anthony Liguori
parent dbd483242c
commit 83755c173f
1 changed files with 4 additions and 0 deletions
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4
vnc.c
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@ -2305,6 +2305,10 @@ static void vnc_refresh(void *opaque)
rects += vnc_update_client(vs, has_dirty);
vs = vs->next;
}
/* vd->timer could be NULL now if the last client disconnected,
* in this case don't update the timer */
if (vd->timer == NULL)
return;
if (has_dirty && rects) {
vd->timer_interval /= 2;