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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-19 21:51:11 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-02-03 00:11:18 +0100 |
| commit | be54da2117a6f58c14283f2511e71fda8d3bfe9d (patch) | |
| tree | c43b0ba56fd35004ea8a17e3c6317aa3b770177d | |
| parent | 53aa76686e7ff4f1f6625502503d7923cec8c10e (diff) | |
| download | ffmpeg-be54da2117a6f58c14283f2511e71fda8d3bfe9d.tar.gz | |
avcodec/snappy: Sanity check bytestream2_get_levarint()
Fixes: left shift of 79 by 28 places cannot be represented in type 'int'
Fixes: 20202/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HAP_fuzzer-5719004081815552
Fixes: 20219/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HAP_fuzzer-5641738677125120
Fixes: 20389/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HAP_fuzzer-5680721517871104
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/snappy.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/snappy.c b/libavcodec/snappy.c index 7900b0f978..f5c4c6578b 100644 --- a/libavcodec/snappy.c +++ b/libavcodec/snappy.c @@ -39,6 +39,8 @@ static int64_t bytestream2_get_levarint(GetByteContext *gb) do { tmp = bytestream2_get_byte(gb); + if (shift > 31 || ((tmp & 127LL) << shift) > INT_MAX) + return AVERROR_INVALIDDATA; val |= (tmp & 127) << shift; shift += 7; } while (tmp & 128); |