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Commit Graph

4 Commits

Author SHA1 Message Date
Mark Thompson
2c96e6cb95 cbs_sei: Detect payload overflows when reading SEI messages
The top-level GetBitContext is sized for the whole NAL unit, so it fails
to detect overflows where a payload continues into the following message.
To fix that, we make a new context on the stack for reading each payload.

Fixes: 29892/clusterfuzz-testcase-minimized-ffmpeg_BSF_H264_REDUNDANT_PPS_fuzzer-6310830956216320
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Tested-by: Michael Niedermayer <michael@niedermayer.cc>
2021-03-12 22:45:33 +00:00
Mark Thompson
88b65bed9c cbs_sei: Remove restrictions on MDCV values
Since this was originally written the standards have changed to allow
arbitrary values here, but leaves their meaning unspecified.
2021-01-21 17:13:54 +00:00
Mark Thompson
8843607f49 cbs_h2645: Merge SEI message handling in common between codecs 2021-01-21 17:13:54 +00:00
Mark Thompson
4bf3384800 cbs_h2645: Merge SEI messages in common between codecs
Make a new template file for common SEI messages - this will also apply
to H.266.
2021-01-21 17:13:54 +00:00