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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-04-26 21:19:13 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-02 19:55:09 +0200 |
| commit | af354a91d33dbf4e18f0a82d317efe504bc3386b (patch) | |
| tree | 3a1e2b2103935ecab44a7c6bbb485a2a83994722 | |
| parent | 738e284ff9b53523e467baff8c7eb8c3b1caa447 (diff) | |
| download | ffmpeg-af354a91d33dbf4e18f0a82d317efe504bc3386b.tar.gz | |
avcodec/wmalosslessdec: Fix integer overflows in revert_inter_ch_decorr()
Fixes: signed integer overflow: -717241856 + -1434459904 cannot be represented in type 'int'
Fixes: 21405/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMALOSSLESS_fuzzer-5677143666458624
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 e9a4c4fe9918220be492a4a9d74c2293fd706be3)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/wmalosslessdec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/wmalosslessdec.c b/libavcodec/wmalosslessdec.c index 22596bd5f8..8eb473e3ba 100644 --- a/libavcodec/wmalosslessdec.c +++ b/libavcodec/wmalosslessdec.c @@ -793,8 +793,8 @@ static void revert_inter_ch_decorr(WmallDecodeCtx *s, int tile_size) else if (s->is_channel_coded[0] || s->is_channel_coded[1]) { int icoef; for (icoef = 0; icoef < tile_size; icoef++) { - s->channel_residues[0][icoef] -= s->channel_residues[1][icoef] >> 1; - s->channel_residues[1][icoef] += s->channel_residues[0][icoef]; + s->channel_residues[0][icoef] -= (unsigned)(s->channel_residues[1][icoef] >> 1); + s->channel_residues[1][icoef] += (unsigned) s->channel_residues[0][icoef]; } } } |