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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-01-31 14:59:27 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-11 21:23:49 +0200 |
| commit | 4db28ef7c24a4cea4e2eaa807c47a476fded40b9 (patch) | |
| tree | 07e73db4205ac27eea174cde76f187298dff1e46 | |
| parent | c58d3ebcf498139e849c0b9b4d923e015e992dcd (diff) | |
| download | ffmpeg-4db28ef7c24a4cea4e2eaa807c47a476fded40b9.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 4fae797251..7da65cdba5 100644 --- a/libavcodec/hevc_sei.c +++ b/libavcodec/hevc_sei.c @@ -336,6 +336,8 @@ static int decode_nal_sei_message(GetBitContext *gb, HEVCSEIContext *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, s, ps, payload_type, payload_size, logctx); } else { /* nal_unit_type == NAL_SEI_SUFFIX */ |