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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-31 14:59:27 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-20 14:21:24 +0100 |
| commit | fc0453d3e4e04cad2d71dc19489abdfb9a39c66f (patch) | |
| tree | 1519912a0439c3b600815b0301a95eed0d9f7dd3 | |
| parent | aaa74324ca708587580b7783ac7ebfbe1a97dec5 (diff) | |
| download | ffmpeg-fc0453d3e4e04cad2d71dc19489abdfb9a39c66f.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 60570690cf..b4b90b570b 100644 --- a/libavcodec/hevc_sei.c +++ b/libavcodec/hevc_sei.c @@ -343,6 +343,8 @@ static int decode_nal_sei_message(GetBitContext *gb, void *logctx, HEVCSEI *s, byte = get_bits(gb, 8); payload_size += byte; } + if (get_bits_left(gb) < 8LL*payload_size) + return AVERROR_INVALIDDATA; if (nal_unit_type == HEVC_NAL_SEI_PREFIX) { return decode_nal_sei_prefix(gb, logctx, s, ps, payload_type, payload_size); } else { /* nal_unit_type == NAL_SEI_SUFFIX */ |