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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-05 02:33:43 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-06-06 16:58:08 +0200 |
| commit | 424a81df107b63a166894a4aee3d27702ae3f459 (patch) | |
| tree | 7a293a528ac74708b36924617ecd60a94702e752 /libavcodec/shorten.c | |
| parent | 936f4a2c2e14ec753e8835f2e820b4cd9aec9a56 (diff) | |
avcodec/shorten: Check non COMM chunk len before skip in decode_aiff_header()
Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 8024/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SHORTEN_fuzzer-5109204648984576
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/shorten.c')
| -rw-r--r-- | libavcodec/shorten.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/shorten.c b/libavcodec/shorten.c index 49af6beec6..ae0cdfe09d 100644 --- a/libavcodec/shorten.c +++ b/libavcodec/shorten.c @@ -234,11 +234,11 @@ static int decode_aiff_header(AVCodecContext *avctx, const uint8_t *header, while (bytestream2_get_le32(&gb) != MKTAG('C', 'O', 'M', 'M')) { len = bytestream2_get_be32(&gb); - bytestream2_skip(&gb, len + (len & 1)); - if (len < 0 || bytestream2_get_bytes_left(&gb) < 18) { + if (len < 0 || bytestream2_get_bytes_left(&gb) < 18LL + len + (len&1)) { av_log(avctx, AV_LOG_ERROR, "no COMM chunk found\n"); return AVERROR_INVALIDDATA; } + bytestream2_skip(&gb, len + (len & 1)); } len = bytestream2_get_be32(&gb); |