[FFmpeg-cvslog] avcodec/pngdsp: fix (un)signed type in end comparission
Michael Niedermayer
git at videolan.org
Mon Sep 23 00:13:43 CEST 2013
ffmpeg | branch: release/0.9 | Michael Niedermayer <michaelni at gmx.at> | Fri Aug 30 23:14:32 2013 +0200| [40d4e82e2ecd53668d831df51ecc9e05ca41d5f0] | committer: Michael Niedermayer
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)
Conflicts:
libavcodec/pngdsp.c
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=40d4e82e2ecd53668d831df51ecc9e05ca41d5f0
---
libavcodec/pngdec.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 609b21e..1a0b298 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -133,7 +133,7 @@ static void png_put_interlaced_row(uint8_t *dst, int width,
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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