diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-09-06 10:46:38 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 12:49:26 +0200 |
| commit | 69000f77bc8c3ae4ba6fcdcce372dfb8bf7a985d (patch) | |
| tree | b129127eff63e4c73d5f42c86f5093fd3245f08d | |
| parent | dcb101dbd768a173193f10e41cdef8b392eefdcc (diff) | |
| download | ffmpeg-69000f77bc8c3ae4ba6fcdcce372dfb8bf7a985d.tar.gz | |
avcodec/alac: Fix invalid shifts in 20/24 bps
Fixes: left shift of negative value -256
Fixes: 16892/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ALAC_fuzzer-4880802642395136
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 b30c07cc2b9ee5bc52e1782eba9aa40e99085a7e)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -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 c34b8eb523..34010b0d49 100644 --- a/libavcodec/alac.c +++ b/libavcodec/alac.c @@ -394,13 +394,13 @@ 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] <<= 12; + alac->output_samples_buffer[ch][i] *= 1 << 12; }} break; case 24: { for (ch = 0; ch < channels; ch++) { for (i = 0; i < alac->nb_samples; i++) - alac->output_samples_buffer[ch][i] <<= 8; + alac->output_samples_buffer[ch][i] *= 1 << 8; }} break; } |