ffmpeg | branch: master | Michael Niedermayer <michae...@gmx.at> | Tue Feb 24 03:12:22 2015 +0100| [8f4cbf940212079a34753c7f4d6c6b5a43586d30] | committer: Michael Niedermayer
avcodec/snowdec: Fix ref value check Fixes integer overflow and out of array read. Fixes: signal_sigsegv_24169e6_3445_cov_3778346427_snow_chroma_bug.avi Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer <michae...@gmx.at> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=8f4cbf940212079a34753c7f4d6c6b5a43586d30 --- libavcodec/snowdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c index e37190d..81fe03c 100644 --- a/libavcodec/snowdec.c +++ b/libavcodec/snowdec.c @@ -174,7 +174,7 @@ static int decode_q_branch(SnowContext *s, int level, int x, int y){ int l = left->color[0]; int cb= left->color[1]; int cr= left->color[2]; - int ref = 0; + unsigned ref = 0; int ref_context= av_log2(2*left->ref) + av_log2(2*top->ref); int mx_context= av_log2(2*FFABS(left->mx - top->mx)) + 0*av_log2(2*FFABS(tr->mx - top->mx)); int my_context= av_log2(2*FFABS(left->my - top->my)) + 0*av_log2(2*FFABS(tr->my - top->my)); _______________________________________________ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog
