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| author | Michael Niedermayer <michael@niedermayer.cc> | 2023-07-25 02:13:10 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2023-07-25 23:17:29 +0200 |
| commit | 0ba719f726632d73592311615087a0d64aa2fb60 (patch) | |
| tree | 636b0c8a00f837b7dd604a177f17209a95c7b8f3 | |
| parent | ac3e6b74bdd6959ce4411e78161b2f06d0926c43 (diff) | |
| download | ffmpeg-0ba719f726632d73592311615087a0d64aa2fb60.tar.gz | |
avcodec/cbs_h2645: Avoid an unchecked bytesteram read
The unchecked read caused the 2nd subsequent tell call to move backward resulting
in a negative length
Fixes: assertion failure
Fixes: 60276/clusterfuzz-testcase-minimized-ffmpeg_BSF_TRACE_HEADERS_fuzzer-5434126636023808
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/cbs_h2645.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/cbs_h2645.c b/libavcodec/cbs_h2645.c index 34c5d1d372..21c8bc76d5 100644 --- a/libavcodec/cbs_h2645.c +++ b/libavcodec/cbs_h2645.c @@ -695,7 +695,7 @@ static int cbs_h2645_split_fragment(CodedBitstreamContext *ctx, int nal_unit_type = bytestream2_get_byte(&gbc) & 0x1f; unsigned int num_nalus = 1; if(nal_unit_type != VVC_DCI_NUT && nal_unit_type != VVC_OPI_NUT) - num_nalus = bytestream2_get_be16u(&gbc); + num_nalus = bytestream2_get_be16(&gbc); start = bytestream2_tell(&gbc); for(i = 0; i < num_nalus; i++) { |