diff options
| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-08 14:29:01 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-09 19:37:27 +0100 |
| commit | 5552ceaf568915e668679f9581e07eb5507cafc4 (patch) | |
| tree | 49586a5c37d9ad0b179726c6c7ce316405012d8a | |
| parent | 69754e07f5133b20bc789c7dea5d05714f63bf7f (diff) | |
avformat/wtvdec: Check len in parse_chunks() to avoid overflow
Fixes: signed integer overflow: 2147483647 + 7 cannot be represented in type 'int'
Fixes: 30084/clusterfuzz-testcase-minimized-ffmpeg_dem_WTV_fuzzer-6192261941559296
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/wtvdec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/wtvdec.c b/libavformat/wtvdec.c index 6c41e3c1a3..7def9d2348 100644 --- a/libavformat/wtvdec.c +++ b/libavformat/wtvdec.c @@ -794,7 +794,7 @@ static int parse_chunks(AVFormatContext *s, int mode, int64_t seekts, int *len_p ff_get_guid(pb, &g); len = avio_rl32(pb); - if (len < 32) { + if (len < 32 || len > INT_MAX - 7) { int ret; if (avio_feof(pb)) return AVERROR_EOF; |