CheckPassiveGrabsOnWindow() needs to handle NULL return value from AllocGrab()
CheckPassiveGrabsOnWindow() calls AllocGrab() which can fail and return NULL. This return value is not checked, and can cause NULL pointer dereferences. Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com> Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net> Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
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@ -3956,6 +3956,8 @@ CheckPassiveGrabsOnWindow(WindowPtr pWin,
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return NULL;
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tempGrab = AllocGrab(NULL);
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if (tempGrab == NULL)
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return NULL;
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/* Fill out the grab details, but leave the type for later before
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* comparing */
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