diff options
| author | Michael Niedermayer <[email protected]> | 2020-11-07 21:39:21 +0100 |
|---|---|---|
| committer | Michael Niedermayer <[email protected]> | 2021-02-02 14:18:21 +0100 |
| commit | b9ea0689ea5829565fbf694ec83679926314afec (patch) | |
| tree | 484dccba5e0556ce3cdf7dfd443842dc107d9afc | |
| parent | 6acd99576bc8c0a5c5e72ae13fd0b9608c930bd2 (diff) | |
avformat/id3v2: Sanity check tlen before alloc and uncompress
Fixes: Timeout (>20sec -> 65ms)
Fixes: 26896/clusterfuzz-testcase-minimized-ffmpeg_dem_DAUD_fuzzer-5691024049176576
Fixes: 27627/clusterfuzz-testcase-minimized-ffmpeg_dem_AEA_fuzzer-4907019324358656
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <[email protected]>
(cherry picked from commit d7f87a4b9ef18a9846439b7787874cc11e5940de)
Signed-off-by: Michael Niedermayer <[email protected]>
| -rw-r--r-- | libavformat/id3v2.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavformat/id3v2.c b/libavformat/id3v2.c index cecd9b9f6d..336a3964de 100644 --- a/libavformat/id3v2.c +++ b/libavformat/id3v2.c @@ -993,6 +993,9 @@ static void id3v2_parse(AVIOContext *pb, AVDictionary **metadata, av_log(s, AV_LOG_DEBUG, "Compresssed frame %s tlen=%d dlen=%ld\n", tag, tlen, dlen); + if (tlen <= 0) + goto seek; + av_fast_malloc(&uncompressed_buffer, &uncompressed_buffer_size, dlen); if (!uncompressed_buffer) { av_log(s, AV_LOG_ERROR, "Failed to alloc %ld bytes\n", dlen); |