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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-02-08 14:29:01 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-09 22:02:20 +0200 |
| commit | 439d8ae6848ae0f81f5bccd7908c0bfe8de1e71f (patch) | |
| tree | 00793ee6c738c0a13b631c51a687f2877e10f1ed | |
| parent | 1be3f57841f4b40d7fd607f3cfac198b2807b493 (diff) | |
| download | ffmpeg-439d8ae6848ae0f81f5bccd7908c0bfe8de1e71f.tar.gz | |
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>
(cherry picked from commit 5552ceaf568915e668679f9581e07eb5507cafc4)
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 7a64f7a211..262b4337a4 100644 --- a/libavformat/wtvdec.c +++ b/libavformat/wtvdec.c @@ -795,7 +795,7 @@ 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; |