virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-01-29 22:00:58 +02:00
Code Issues Releases Activity

libavformat/utils: consider avio_size() failure in ffio_limit()

Browse Source 
Fixes: Timeout (>20sec -> 3ms)
Fixes: 26918/clusterfuzz-testcase-minimized-ffmpeg_dem_THP_fuzzer-5750425191710720

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 1b1dac2716d713dfd6949b7eb4a3c18c16f1faf6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-11-09 19:58:20 +01:00
parent 1f29e97714
commit 41d3d169b4
1 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
libavformat/utils.c
View File

@ -226,13 +226,16 @@ int av_format_get_probe_score(const AVFormatContext *s)
int ffio_limit(AVIOContext *s, int size)
{
if (s->maxsize>= 0) {
int64_t remaining= s->maxsize - avio_tell(s);
int64_t pos = avio_tell(s);
int64_t remaining= s->maxsize - pos;
if (remaining < size) {
int64_t newsize = avio_size(s);
if (!s->maxsize || s->maxsize<newsize)
s->maxsize = newsize - !newsize;
remaining= s->maxsize - avio_tell(s);
remaining= FFMAX(remaining, 0);
if (pos > s->maxsize && s->maxsize >= 0)
s->maxsize = AVERROR(EIO);
if (s->maxsize >= 0)
remaining = s->maxsize - pos;
}
if (s->maxsize>= 0 && remaining+1 < size) {