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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-12 23:50:27 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-18 18:35:57 +0100 |
| commit | a70d8363648fdd380df7f2ed39eaccf08d406e6a (patch) | |
| tree | 94d42fe2c8467a0206514e10b4f9de85d708b793 /libavcodec | |
| parent | e7af64178a48b30bade107c2d2938b48bd86eb82 (diff) | |
| download | ffmpeg-a70d8363648fdd380df7f2ed39eaccf08d406e6a.tar.gz | |
avcodec/cbs_av1: Check leb128 values read
"It is a requirement of bitstream conformance that the value returned from the leb128 parsing process is less than or equal
to (1 << 32) - 1."
Fixes: assertion failure
Fixes: 19293/clusterfuzz-testcase-minimized-ffmpeg_BSF_TRACE_HEADERS_fuzzer-5749508361420800
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')
| -rw-r--r-- | libavcodec/cbs_av1.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/cbs_av1.c b/libavcodec/cbs_av1.c index ab006f4d11..16eb7143b6 100644 --- a/libavcodec/cbs_av1.c +++ b/libavcodec/cbs_av1.c @@ -170,6 +170,9 @@ static int cbs_av1_read_leb128(CodedBitstreamContext *ctx, GetBitContext *gbc, break; } + if (value > UINT32_MAX) + return AVERROR_INVALIDDATA; + if (ctx->trace_enable) ff_cbs_trace_syntax_element(ctx, position, name, NULL, "", value); |