1 From 5c82d91a5e15d29b1489dcb413b24ee7fdf59934 Mon Sep 17 00:00:00 2001
2 From: Bryce Harrington <bryce@osg.samsung.com>
3 Date: Wed, 3 Dec 2014 19:28:15 -0800
4 Subject: image: Fix crash in _fill_xrgb32_lerp_opaque_spans
6 If a span length is negative don't go out of bounds processing the fill
9 Patch thanks to Ilya Sakhnenko <ilia.softway@gmail.com> on mailing list.
11 Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>
13 diff --git a/src/cairo-image-compositor.c b/src/cairo-image-compositor.c
14 index 6ff0f09..48072f8 100644
15 --- a/src/cairo-image-compositor.c
16 +++ b/src/cairo-image-compositor.c
17 @@ -2242,10 +2242,10 @@ _fill_xrgb32_lerp_opaque_spans (void *abstract_renderer, int y, int h,
18 spans[0].x, y, len, 1, r->u.fill.pixel);
20 uint32_t *d = (uint32_t*)(r->u.fill.data + r->u.fill.stride*y + spans[0].x*4);
23 *d++ = r->u.fill.pixel;
25 - } else while (len--) {
26 + } else while (len-- > 0) {
27 *d = lerp8x4 (r->u.fill.pixel, a, *d);