From: Carlos Garnacho <[email protected]> The allocated TouchListener array may fall short by 1 if hitting the worst case situation where there's an active grab, passive grabs on each window in the sprite trace and event selection for touch in one of the windows. This may lead to memory corruptions as the array is overflown.
Signed-off-by: Carlos Garnacho <[email protected]> --- dix/touch.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/dix/touch.c b/dix/touch.c index 497ad7d..9241fc1 100644 --- a/dix/touch.c +++ b/dix/touch.c @@ -572,8 +572,8 @@ TouchBuildSprite(DeviceIntPtr sourcedev, TouchPointInfoPtr ti, return FALSE; /* Mark which grabs/event selections we're delivering to: max one grab per - * window plus the bottom-most event selection. */ - ti->listeners = calloc(sprite->spriteTraceGood + 1, sizeof(*ti->listeners)); + * window plus the bottom-most event selection, plus any active grab. */ + ti->listeners = calloc(sprite->spriteTraceGood + 2, sizeof(*ti->listeners)); if (!ti->listeners) { sprite->spriteTraceGood = 0; return FALSE; -- 1.7.11.7 _______________________________________________ [email protected]: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel
