[FFmpeg-cvslog] avcodec/pngdsp: fix (un)signed type in end comparission
Michael Niedermayer
git at videolan.org
Fri Aug 30 23:42:25 CEST 2013
ffmpeg | branch: release/2.0 | Michael Niedermayer <michaelni at gmx.at> | Fri Aug 30 23:14:32 2013 +0200| [a4522ae516b58175c447b65cb44536db08f82552] | committer: Carl Eugen Hoyos
avcodec/pngdsp: fix (un)signed type in end comparission
Fixes out of array accesses
Fixes Ticket2919
Found_by: ami_stuff
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit 86736f59d6a527d8bc807d09b93f971c0fe0bb07)
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a4522ae516b58175c447b65cb44536db08f82552
---
libavcodec/pngdsp.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/pngdsp.c b/libavcodec/pngdsp.c
index 0d24775..5ab1c35 100644
--- a/libavcodec/pngdsp.c
+++ b/libavcodec/pngdsp.c
@@ -31,7 +31,7 @@
static void add_bytes_l2_c(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w)
{
long i;
- for (i = 0; i <= w - sizeof(long); i += sizeof(long)) {
+ for (i = 0; i <= w - (int)sizeof(long); i += sizeof(long)) {
long a = *(long *)(src1 + i);
long b = *(long *)(src2 + i);
*(long *)(dst + i) = ((a & pb_7f) + (b & pb_7f)) ^ ((a ^ b) & pb_80);
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