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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-04-27 02:27:16 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-17 20:35:19 +0200 |
| commit | b3328c069c4762a5c604a788e2199df4514117c1 (patch) | |
| tree | 9b1656d70418d979fcc13f1dd176968ffc5341cc | |
| parent | 8bca0d765121f63f934408d8d050c6f066924edb (diff) | |
| download | ffmpeg-b3328c069c4762a5c604a788e2199df4514117c1.tar.gz | |
avcodec/mdec: Fix runtime error: left shift of negative value -127
Fixes undefined behavior
Fixes: 1275/clusterfuzz-testcase-minimized-6718162017976320
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 6ca82975b7a8eaf676a52738ec8e7e36732327cc)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/mdec.c b/libavcodec/mdec.c index 1cc4ca4742..42bd561cd7 100644 --- a/libavcodec/mdec.c +++ b/libavcodec/mdec.c @@ -73,7 +73,7 @@ static inline int mdec_decode_block_intra(MDECContext *a, int16_t *block, int n) if (diff >= 0xffff) return AVERROR_INVALIDDATA; a->last_dc[component] += diff; - block[0] = a->last_dc[component] << 3; + block[0] = a->last_dc[component] * (1 << 3); } i = 0; |