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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-18 12:49:25 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-15 01:01:22 +0100 |
| commit | 9d428265808255ad2fc60355fe641aaa4fd3dae4 (patch) | |
| tree | 1514b0f1245e275336e7f22a80141891253a0964 | |
| parent | 185f441ba26a2112725db1e8f218e54ac8068bbb (diff) | |
| download | ffmpeg-9d428265808255ad2fc60355fe641aaa4fd3dae4.tar.gz | |
avcodec/wmalosslessdec: Check that padding bits is not more than sample bits
Fixes: left shift of 1 by 31 places cannot be represented in type 'int'
Fixes: 18817/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMALOSSLESS_fuzzer-5713317180211200
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/wmalosslessdec.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c index 7ed6ce3135..9489338cef 100644 --- a/libavcodec/wmalosslessdec.c +++ b/libavcodec/wmalosslessdec.c @@ -950,6 +950,8 @@ static int decode_subframe(WmallDecodeCtx *s) for (j = 0; j < subframe_len; j++) s->channel_residues[i][j] = get_sbits_long(&s->gb, bits); } else { + if (s->bits_per_sample < padding_zeroes) + return AVERROR_INVALIDDATA; for (i = 0; i < s->num_channels; i++) { if (s->is_channel_coded[i]) { decode_channel_residues(s, i, subframe_len); |