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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-13 11:21:52 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-06-14 18:20:37 +0200 |
| commit | bd0f81526d3f4c23ecd0a399829103be2445c011 (patch) | |
| tree | b1a3ae9989791d4ba00c0b36680fbf070dccabff /libavcodec/pixlet.c | |
| parent | 9b5fc789fb52af8769ec66e634ea362a67cb5d06 (diff) | |
| download | ffmpeg-bd0f81526d3f4c23ecd0a399829103be2445c011.tar.gz | |
avcodec/pixlet: Fix log(0) check
Fixes: passing zero to clz(), which is not a valid argument
Fixes: 23337/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PIXLET_fuzzer-5179131989065728
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/pixlet.c')
| -rw-r--r-- | libavcodec/pixlet.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/pixlet.c b/libavcodec/pixlet.c index 7b068b1ce5..78f571cd5f 100644 --- a/libavcodec/pixlet.c +++ b/libavcodec/pixlet.c @@ -221,7 +221,7 @@ static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, length = 25 - nbits; while (i < size) { - if (state >> 8 != -3) + if (((state >> 8) + 3) & 0xFFFFFFF) value = ff_clz((state >> 8) + 3) ^ 0x1F; else value = -1; |