From 788fbf042fc6d5aaeab56757e6dad622ac5f0c21 Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Tue, 10 Jun 2014 13:51:12 +0200 Subject: qxl-render: add sanity check Verify dirty rectangle is completely within the primary surface, just ignore it in case it isn't. Signed-off-by: Gerd Hoffmann --- hw/display/qxl-render.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'hw/display') diff --git a/hw/display/qxl-render.c b/hw/display/qxl-render.c index 84f1367716..cc2c2b1dbc 100644 --- a/hw/display/qxl-render.c +++ b/hw/display/qxl-render.c @@ -138,6 +138,12 @@ static void qxl_render_update_area_unlocked(PCIQXLDevice *qxl) if (qemu_spice_rect_is_empty(qxl->dirty+i)) { 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); dpy_gfx_update(vga->con, qxl->dirty[i].left, qxl->dirty[i].top, -- cgit v1.2.1