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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-18 00:07:50 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-02 19:55:09 +0200 |
| commit | 7a0317e38cdebd673ea0353843f1e76fe9ade1bb (patch) | |
| tree | 093f2bf180166054da9ac4b4284c1a9f518e5c1f | |
| parent | 2b57b593b5216f369888aa7672ab4a11b26163ed (diff) | |
| download | ffmpeg-7a0317e38cdebd673ea0353843f1e76fe9ade1bb.tar.gz | |
avcodec/pcm: Fix invalid shift in pcm_decode_frame for LXF
Fixes: left shift of 32 by 28 places cannot be represented in type 'int'
Fixes: 19472/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PCM_LXF_fuzzer-5704364320096256
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 985d3666f672781152f4b68093740ea6a9888194)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/pcm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/pcm.c b/libavcodec/pcm.c index c52ebcd0d6..482cbbe516 100644 --- a/libavcodec/pcm.c +++ b/libavcodec/pcm.c @@ -501,7 +501,7 @@ static int pcm_decode_frame(AVCodecContext *avctx, void *data, dst_int32_t = (int32_t *)frame->extended_data[c]; for (i = 0; i < n; i++) { // extract low 20 bits and expand to 32 bits - *dst_int32_t++ = (src[2] << 28) | + *dst_int32_t++ = ((uint32_t)src[2]<<28) | (src[1] << 20) | (src[0] << 12) | ((src[2] & 0x0F) << 8) | |