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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-13 00:50:21 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-05-19 17:17:35 +0200 |
| commit | 0e517ef4598b89691d8f3afed5d4441d4c17fa57 (patch) | |
| tree | 491fa5046e4ec4f3890c6421a110dc59f48faa41 | |
| parent | 8d89e97e26fe2030e117f7ece939d13ac4cf0bd8 (diff) | |
| download | ffmpeg-0e517ef4598b89691d8f3afed5d4441d4c17fa57.tar.gz | |
avcodec/hevc_mp4toannexb_bsf: check that nalu size doesnt overflow
Fixes: Out of array access
Fixes: 19299/clusterfuzz-testcase-minimized-ffmpeg_BSF_HEVC_MP4TOANNEXB_fuzzer-5169193398042624
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 a8ceb2a72fa1bef4ab5f1ec6cdc7ce74fffda19d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/hevc_mp4toannexb_bsf.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/libavcodec/hevc_mp4toannexb_bsf.c b/libavcodec/hevc_mp4toannexb_bsf.c index d0f1b94f0e..baa93628ed 100644 --- a/libavcodec/hevc_mp4toannexb_bsf.c +++ b/libavcodec/hevc_mp4toannexb_bsf.c @@ -152,8 +152,7 @@ static int hevc_mp4toannexb_filter(AVBSFContext *ctx, AVPacket *out) extra_size = add_extradata * ctx->par_out->extradata_size; got_irap |= is_irap; - if (SIZE_MAX - nalu_size < 4 || - SIZE_MAX - 4 - nalu_size < extra_size) { + if (FFMIN(INT_MAX, SIZE_MAX) < 4ULL + nalu_size + extra_size) { ret = AVERROR_INVALIDDATA; goto fail; } |