Message ID | 20201030215206.1629-4-michael@niedermayer.cc |
---|---|
State | Accepted |
Commit | 4f66dd13d08d063e2748d172239df595078ff624 |
Headers | show |
Series | [FFmpeg-devel,1/5] avformat/argo_brp: Check block align before use | expand |
Context | Check | Description |
---|---|---|
andriy/x86_make | success | Make finished |
andriy/x86_make_fate | success | Make fate finished |
On Fri, Oct 30, 2020 at 10:52:05PM +0100, Michael Niedermayer wrote: > Fixes: Fixes infinite loop > Fixes: 26704/clusterfuzz-testcase-minimized-ffmpeg_dem_MPC8_fuzzer-6327056939614208 > > Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> > --- > libavformat/mpc8.c | 4 ++++ > 1 file changed, 4 insertions(+) will apply [...]
diff --git a/libavformat/mpc8.c b/libavformat/mpc8.c index ae5cbc0cbf..96a03ed4fd 100644 --- a/libavformat/mpc8.c +++ b/libavformat/mpc8.c @@ -178,6 +178,10 @@ static void mpc8_parse_seektable(AVFormatContext *s, int64_t off) av_add_index_entry(s->streams[0], pos, i, 0, 0, AVINDEX_KEYFRAME); } for(; i < size; i++){ + if (get_bits_left(&gb) < 13) { + av_free(buf); + return; + } t = get_unary(&gb, 1, 33) << 12; t += get_bits(&gb, 12); if(t & 1)
Fixes: Fixes infinite loop Fixes: 26704/clusterfuzz-testcase-minimized-ffmpeg_dem_MPC8_fuzzer-6327056939614208 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavformat/mpc8.c | 4 ++++ 1 file changed, 4 insertions(+)