Peter Hutterer 0f10cfd4b9 Xi: check for invalid modifiers for XI2 passive grabs ...

The other values are checked correctly, but if a modifier was outside the
allowed range, it would go unnoticed and cause a out-of-bounds read error for
any mask equal or larger than 256. The DetailRec where we store the grab masks
is only sized to 8 * sizeof(Mask).

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Alan Coopersmith <alan.coopersmith@oracle.com>

2014-02-21 10:01:13 +10:00

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