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qxl-render: add sanity check

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Verify dirty rectangle is completely within the primary surface,
just ignore it in case it isn't.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Gerd Hoffmann 2014-06-10 13:51:12 +02:00
parent 5643fc012c
commit 788fbf042f
1 changed files with 6 additions and 0 deletions
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6
hw/display/qxl-render.c
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@ -138,6 +138,12 @@ static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl)
if (qemu_spice_rect_is_empty(qxl->dirty+i)) { if (qemu_spice_rect_is_empty(qxl->dirty+i)) {
break; break;
} }
if (qxl->dirty[i].left > qxl->dirty[i].right ||
qxl->dirty[i].top > qxl->dirty[i].bottom ||
qxl->dirty[i].right > qxl->guest_primary.surface.width ||
qxl->dirty[i].bottom > qxl->guest_primary.surface.height) {
continue;
}
qxl_blit(qxl, qxl->dirty+i); qxl_blit(qxl, qxl->dirty+i);
dpy_gfx_update(vga->con, dpy_gfx_update(vga->con,
qxl->dirty[i].left, qxl->dirty[i].top, qxl->dirty[i].left, qxl->dirty[i].top,