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commit 107603e8d3847b17982f09f394769bd0a52f3b25 Author: Michael Niedermayer <[email protected]> AuthorDate: Tue Aug 6 18:18:15 2024 +0200 Commit: Michael Niedermayer <[email protected]> CommitDate: Sun Jun 21 17:59:33 2026 +0200 avformat/av1dec: Check bits left before get_leb128() Fixes: use of uninitialized value Fixes: 70872/clusterfuzz-testcase-minimized-ffmpeg_dem_OBU_fuzzer-6005782487826432 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <[email protected]> (cherry picked from commit 6996e1238e80b23caf05428dcbdd065fbd70ff10) Signed-off-by: Michael Niedermayer <[email protected]> --- libavformat/av1dec.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/libavformat/av1dec.c b/libavformat/av1dec.c index 5ae81b34d4..aaba22a0a4 100644 --- a/libavformat/av1dec.c +++ b/libavformat/av1dec.c @@ -331,6 +331,9 @@ static int read_obu_with_size(const uint8_t *buf, int buf_size, int64_t *obu_siz skip_bits(&gb, 3); // extension_header_reserved_3bits } + if (get_bits_left(&gb) < 8) + return AVERROR_INVALIDDATA; + *obu_size = leb128(&gb); if (*obu_size > INT_MAX) return AVERROR_INVALIDDATA; _______________________________________________ ffmpeg-cvslog mailing list -- [email protected] To unsubscribe send an email to [email protected]
