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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-19 17:39:30 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:53:29 +0200 |
| commit | afb0664623c7b345f8ae5e57a07801c937be114b (patch) | |
| tree | 0495414ef1dcaa50d5503c447afb3dc2470ad8d5 /libavformat | |
| parent | be62e519435b7995cc551740e3dd81c7d3c96ef4 (diff) | |
| download | ffmpeg-afb0664623c7b345f8ae5e57a07801c937be114b.tar.gz | |
avformat/mvi: Check count for overflow
Fixes: left shift of 21378748 by 10 places cannot be represented in type 'int'
Fixes: 26449/clusterfuzz-testcase-minimized-ffmpeg_dem_MVI_fuzzer-5680463374712832
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 a413ed98632127342ad04b26e0ba0dc26adb70c9)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavformat')
| -rw-r--r-- | libavformat/mvi.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/mvi.c b/libavformat/mvi.c index 9f90faf56b..1e2a08b44c 100644 --- a/libavformat/mvi.c +++ b/libavformat/mvi.c @@ -122,6 +122,8 @@ static int read_packet(AVFormatContext *s, AVPacket *pkt) count = (mvi->audio_size_counter + mvi->audio_frame_size + 512) >> MVI_FRAC_BITS; if (count > mvi->audio_size_left) count = mvi->audio_size_left; + if ((int64_t)count << MVI_FRAC_BITS > INT_MAX) + return AVERROR_INVALIDDATA; if ((ret = av_get_packet(pb, pkt, count)) < 0) return ret; pkt->stream_index = MVI_AUDIO_STREAM_INDEX; |