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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-07-26 14:33:14 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-11-15 12:25:45 +0100 |
| commit | fb12d635c5ca96eb5c164d7a0d362ff7cd17247a (patch) | |
| tree | f0b8392baad867d2cd23b6838d6b4e1fafff67e2 | |
| parent | 351381a3e3443e6e6330cc122d3a5ee0b550bfae (diff) | |
| download | ffmpeg-fb12d635c5ca96eb5c164d7a0d362ff7cd17247a.tar.gz | |
avcodec/alsdec: Fix integer overflow of raw_samples in decode_blocks()
Fixes: signed integer overflow: 2147483424 - -1772303236 cannot be represented in type 'int'
Fixes: 15708/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALS_fuzzer-5067890362941440
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 ce652324062a2c72f92e40699797630ef7f1ec5a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/alsdec.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c index 41aa051907..21282eb459 100644 --- a/libavcodec/alsdec.c +++ b/libavcodec/alsdec.c @@ -1180,10 +1180,10 @@ static int decode_blocks(ALSDecContext *ctx, unsigned int ra_frame, av_log(ctx->avctx, AV_LOG_WARNING, "Invalid channel pair.\n"); for (s = 0; s < div_blocks[b]; s++) - bd[0].raw_samples[s] = bd[1].raw_samples[s] - bd[0].raw_samples[s]; + bd[0].raw_samples[s] = bd[1].raw_samples[s] - (unsigned)bd[0].raw_samples[s]; } else if (bd[1].js_blocks) { for (s = 0; s < div_blocks[b]; s++) - bd[1].raw_samples[s] = bd[1].raw_samples[s] + bd[0].raw_samples[s]; + bd[1].raw_samples[s] = bd[1].raw_samples[s] + (unsigned)bd[0].raw_samples[s]; } offset += div_blocks[b]; |