qxl/update_area_io: guest_bug on invalid parameters
Signed-off-by: Alon Levy <alevy@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
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hw/qxl.c
12
hw/qxl.c
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@ -1386,6 +1386,18 @@ async_common:
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QXLCookie *cookie = NULL;
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QXLRect update = d->ram->update_area;
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if (d->ram->update_surface > NUM_SURFACES) {
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qxl_set_guest_bug(d, "QXL_IO_UPDATE_AREA: invalid surface id %d\n",
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d->ram->update_surface);
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return;
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}
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if (update.left >= update.right || update.top >= update.bottom) {
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qxl_set_guest_bug(d,
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"QXL_IO_UPDATE_AREA: invalid area (%ux%u)x(%ux%u)\n",
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update.left, update.top, update.right, update.bottom);
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return;
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}
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if (async == QXL_ASYNC) {
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cookie = qxl_cookie_new(QXL_COOKIE_TYPE_IO,
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QXL_IO_UPDATE_AREA_ASYNC);
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