[FFmpeg-cvslog] avidec: avoid infinite loop due to negative ast->sample_size
Andreas Cadhalpun
git at videolan.org
Thu May 21 21:25:53 CEST 2015
ffmpeg | branch: release/2.5 | Andreas Cadhalpun <andreas.cadhalpun at googlemail.com> | Mon May 4 23:01:45 2015 +0200| [84db3e6648860bb4ad630f989ca2e07877fbe36c] | committer: Michael Niedermayer
avidec: avoid infinite loop due to negative ast->sample_size
If max in clean_index is set to a negative ast->sample_size, the
following loop never ends:
while (max < 1024)
max += max;
Thus set ast->sample_size to 0 if it would otherwise be negative.
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun at googlemail.com>
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
(cherry picked from commit ca234639ac49a0dc073ac1f10977979acdb94f97)
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=84db3e6648860bb4ad630f989ca2e07877fbe36c
---
libavformat/avidec.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/libavformat/avidec.c b/libavformat/avidec.c
index 032731d..91e8514 100644
--- a/libavformat/avidec.c
+++ b/libavformat/avidec.c
@@ -686,6 +686,7 @@ static int avi_read_header(AVFormatContext *s)
default:
av_log(s, AV_LOG_INFO, "unknown stream type %X\n", tag1);
}
+ ast->sample_size = FFMAX(ast->sample_size, 0);
if (ast->sample_size == 0) {
st->duration = st->nb_frames;
if (st->duration > 0 && avi->io_fsize > 0 && avi->riff_end > avi->io_fsize) {
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