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| author | Michael Niedermayer <michael@niedermayer.cc> | 2024-09-12 22:29:04 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2024-09-19 00:39:21 +0200 |
| commit | 5a96aa435af0d66bdec52ee115cf4dd971855fcd (patch) | |
| tree | 8f4966d79a79f5cd0dc82665b69b4aa3f76c2a72 | |
| parent | 176db9db6e23f3299da379060adc89e4abc980b9 (diff) | |
| download | ffmpeg-5a96aa435af0d66bdec52ee115cf4dd971855fcd.tar.gz | |
avformat/mxfdec: More offset_temp checks
Fixes: signed integer overflow: 9223372036854775807 - -1927491430256034080 cannot be represented in type 'long'
Fixes: 70607/clusterfuzz-testcase-minimized-ffmpeg_dem_MXF_fuzzer-5282235077951488
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <git@haerdin.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/mxfdec.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c index 2a076931ed..17a04e16f1 100644 --- a/libavformat/mxfdec.c +++ b/libavformat/mxfdec.c @@ -1921,6 +1921,11 @@ static int mxf_edit_unit_absolute_offset(MXFContext *mxf, MXFIndexTable *index_t return mxf_absolute_bodysid_offset(mxf, index_table->body_sid, offset_temp, offset_out, partition_out); } else { /* EditUnitByteCount == 0 for VBR indexes, which is fine since they use explicit StreamOffsets */ + if (s->edit_unit_byte_count && (s->index_duration > INT64_MAX / s->edit_unit_byte_count || + s->edit_unit_byte_count * s->index_duration > INT64_MAX - offset_temp) + ) + return AVERROR_INVALIDDATA; + offset_temp += s->edit_unit_byte_count * s->index_duration; } } |