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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-05 13:15:34 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-15 22:31:13 +0200 |
| commit | 028a0c91487d8cf094239557d66edd57a114057f (patch) | |
| tree | e04ab5fd0476b54e2a938708dbbd80dc58531157 | |
| parent | 9a53e8572acc54c8f4bb8ca09f312075f88737f9 (diff) | |
| download | ffmpeg-028a0c91487d8cf094239557d66edd57a114057f.tar.gz | |
avcodec/shorten: Fix undefined shift in fix_bitshift()
Fixes: left shift of negative value -9
Fixes: 8571/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SHORTEN_fuzzer-5715966875926528
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 606c7148231404544005c0827b83c165dd6b39a8)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/shorten.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c index f7475b4954..0bd3e1e5f7 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -177,7 +177,7 @@ static void fix_bitshift(ShortenContext *s, int32_t *buffer) buffer[i] = 0; } else if (s->bitshift != 0) { for (i = 0; i < s->blocksize; i++) - buffer[i] <<= s->bitshift; + buffer[i] *= 1 << s->bitshift; } } |