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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-04-23 17:35:20 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-09 13:54:52 +0200 |
| commit | c064645bdf08977b3e17335747493aa53cb64daa (patch) | |
| tree | 2c5a8438ac5350fb79ee874afcb0086dee4b3caa | |
| parent | 150642566c84a92070ddf7d0bbdbec52b2a77cbf (diff) | |
| download | ffmpeg-c064645bdf08977b3e17335747493aa53cb64daa.tar.gz | |
avformat/asfdec_f: Check sizeX against padding
Fixes: signed integer overflow: 2147483607 + 64 cannot be represented in type 'int'
Fixes: 29102/clusterfuzz-testcase-minimized-ffmpeg_dem_ASF_fuzzer-6753897878257664
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 f034c2e36acb7d0c11dc1849ddf8a67bde44eff4)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/asfdec_f.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/asfdec_f.c b/libavformat/asfdec_f.c index 922ad3c29f..81bf9d83e9 100644 --- a/libavformat/asfdec_f.c +++ b/libavformat/asfdec_f.c @@ -516,7 +516,7 @@ static int asf_read_stream_properties(AVFormatContext *s, int64_t size) tag1 = avio_rl32(pb); avio_skip(pb, 20); if (sizeX > 40) { - if (size < sizeX - 40) + if (size < sizeX - 40 || sizeX - 40 > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) return AVERROR_INVALIDDATA; st->codecpar->extradata_size = ffio_limit(pb, sizeX - 40); st->codecpar->extradata = av_mallocz(st->codecpar->extradata_size + |