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| author | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-15 22:04:56 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-10-20 15:33:13 +0200 |
| commit | 0d088a47ca0243576078f109fff20617d1fac382 (patch) | |
| tree | fd8b02b96b118544ef4d58299efaafb95883a3e2 /libavformat | |
| parent | d1983628394e076001cc67d85656f9842b7282a3 (diff) | |
| download | ffmpeg-0d088a47ca0243576078f109fff20617d1fac382.tar.gz | |
avformat/asfdec_f: Check name_len for overflow
Fixes: signed integer overflow: -1172299744 * 2 cannot be represented in type 'int'
Fixes: 26258/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5672758488596480
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 'libavformat')
| -rw-r--r-- | libavformat/asfdec_f.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/asfdec_f.c b/libavformat/asfdec_f.c index 103155e9e7..ff9107d73f 100644 --- a/libavformat/asfdec_f.c +++ b/libavformat/asfdec_f.c @@ -769,6 +769,8 @@ static int asf_read_marker(AVFormatContext *s, int64_t size) avio_rl32(pb); // send time avio_rl32(pb); // flags name_len = avio_rl32(pb); // name length + if ((unsigned)name_len > INT_MAX / 2) + return AVERROR_INVALIDDATA; if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len) avio_skip(pb, name_len - ret); |