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>
return BadValue;
}
- if (param->grabtype != XI2 && (param->modifiers != AnyModifier) &&
+ if (param->modifiers != AnyModifier &&
+ param->modifiers != XIAnyModifier &&
(param->modifiers & ~AllModifiersMask)) {
client->errorValue = param->modifiers;
return BadValue;
uint8_t status = Success;
param.modifiers = *modifiers;
+ ret = CheckGrabValues(client, ¶m);
+ if (ret != Success)
+ goto out;
+
switch (stuff->grab_type) {
case XIGrabtypeButton:
status = GrabButton(client, dev, mod_dev, stuff->detail,