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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-31 14:59:27 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-09 22:02:20 +0200 |
| commit | d472de012ab87e2d608681195c494f113130d013 (patch) | |
| tree | 1433ed36fad67c5f94fc96f65e1f0b78f4103c50 | |
| parent | 4fd805a2ae03dfed4bbec14bffa645779b874758 (diff) | |
| download | ffmpeg-d472de012ab87e2d608681195c494f113130d013.tar.gz | |
avcodec/hevc_sei: Check payload size in decode_nal_sei_message()
Fixes: out of array access
Fixes: 29392/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-4821602850177024.fuzz
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 0791a515d38fd35c1e2a309ec8f4015153687b8c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/hevc_sei.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/hevc_sei.c b/libavcodec/hevc_sei.c index 019cbfdd60..b89e436a1c 100644 --- a/libavcodec/hevc_sei.c +++ b/libavcodec/hevc_sei.c @@ -356,6 +356,8 @@ static int decode_nal_sei_message(HEVCContext *s) byte = get_bits(gb, 8); payload_size += byte; } + if (get_bits_left(gb) < 8LL*payload_size) + return AVERROR_INVALIDDATA; if (s->nal_unit_type == NAL_SEI_PREFIX) { return decode_nal_sei_prefix(s, payload_type, payload_size); } else { /* nal_unit_type == NAL_SEI_SUFFIX */ |