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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-05-10 11:08:28 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 13:33:44 +0200 |
| commit | 3ee001de6f71a66f52d539022a5d9b5b2ca2f735 (patch) | |
| tree | ca052ac8be5ffa02326a2da71dbcfdc089538ec2 /libavcodec | |
| parent | 033ecda2f2b894ec499f99f34c0396841f2579d9 (diff) | |
| download | ffmpeg-3ee001de6f71a66f52d539022a5d9b5b2ca2f735.tar.gz | |
avcodec/alac: Fix integer overflow with 24/20bps samples
Fixes: signed integer overflow: 1020048 * 4096 cannot be represented in type 'int'
Fixes: 20492/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALAC_fuzzer-5753877751660544
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 22e51e95ac97864b3d7b21124eaf8fcce147f61e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/alac.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/alac.c b/libavcodec/alac.c index cf0f4fc147..bb0619a2d0 100644 --- a/libavcodec/alac.c +++ b/libavcodec/alac.c @@ -397,13 +397,13 @@ static int decode_element(AVCodecContext *avctx, AVFrame *frame, int ch_index, case 20: { for (ch = 0; ch < channels; ch++) { for (i = 0; i < alac->nb_samples; i++) - alac->output_samples_buffer[ch][i] *= 1 << 12; + alac->output_samples_buffer[ch][i] *= 1U << 12; }} break; case 24: { for (ch = 0; ch < channels; ch++) { for (i = 0; i < alac->nb_samples; i++) - alac->output_samples_buffer[ch][i] *= 1 << 8; + alac->output_samples_buffer[ch][i] *= 1U << 8; }} break; } |