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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-11-14 22:13:52 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-11 21:23:48 +0200 |
| commit | 9ca75063eae7a2d755391fcd8c7f5c10255245d0 (patch) | |
| tree | 14c0b9a20bd96d246e840bf6de1fcefa908b81a2 | |
| parent | b9df29a39326f965405324b1cd3034a4366a1bc1 (diff) | |
| download | ffmpeg-9ca75063eae7a2d755391fcd8c7f5c10255245d0.tar.gz | |
avformat/wavdec: More complete size check in find_guid()
Fixes: signed integer overflow: 9223372036854775807 + 8 cannot be represented in type 'long'
Fixes: 27341/clusterfuzz-testcase-minimized-ffmpeg_dem_W64_fuzzer-5442833206738944
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 a207df2acb92d6366ab2f0f18ba35709066b8eec)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/wavdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/wavdec.c b/libavformat/wavdec.c index 1bb987f47b..2938914cd0 100644 --- a/libavformat/wavdec.c +++ b/libavformat/wavdec.c @@ -599,7 +599,7 @@ static int64_t find_guid(AVIOContext *pb, const uint8_t guid1[16]) while (!avio_feof(pb)) { avio_read(pb, guid, 16); size = avio_rl64(pb); - if (size <= 24) + if (size <= 24 || size > INT64_MAX - 8) return AVERROR_INVALIDDATA; if (!memcmp(guid, guid1, 16)) return size; |