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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-06-24 01:01:04 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 12:11:55 +0200 |
| commit | 3150e804d542f61a887f1593bf7a421bed6b6ef1 (patch) | |
| tree | c3d415e9bed8543fd3cd55a286ae128b6eefd231 | |
| parent | 8a95eef2871669ad2594ec5056d312cc8ca5f85a (diff) | |
| download | ffmpeg-3150e804d542f61a887f1593bf7a421bed6b6ef1.tar.gz | |
avcodec/qdm2: Check checksum_size for 0
Fixes: Infinite loop
Fixes: 15337/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDM2_fuzzer-5757428949319680
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 7b2ebf89a411d957ca999f1e7a919ff617fbfd56)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/qdm2.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/qdm2.c b/libavcodec/qdm2.c index 4aa86c7d97..37d4a389c3 100644 --- a/libavcodec/qdm2.c +++ b/libavcodec/qdm2.c @@ -1728,8 +1728,8 @@ static av_cold int qdm2_decode_init(AVCodecContext *avctx) extradata += 4; s->checksum_size = AV_RB32(extradata); - if (s->checksum_size >= 1U << 28) { - av_log(avctx, AV_LOG_ERROR, "data block size too large (%u)\n", s->checksum_size); + if (s->checksum_size >= 1U << 28 || !s->checksum_size) { + av_log(avctx, AV_LOG_ERROR, "data block size invalid (%u)\n", s->checksum_size); return AVERROR_INVALIDDATA; } |