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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-03-18 10:59:19 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-09 22:02:20 +0200 |
| commit | 92049dc2054e99fad8b041c53ba7bdfd2b3dceab (patch) | |
| tree | f3f0ebce4d71d9ddadf9606374e4b33f2e7a091b | |
| parent | 134e261b990a9ac166fa243cf9903f3226d2c4ae (diff) | |
| download | ffmpeg-92049dc2054e99fad8b041c53ba7bdfd2b3dceab.tar.gz | |
avformat/avidec: Check for dv streams before using priv_data in parse ##dc/##wb
Fixes: null pointer dereference
Fixes: 31588/clusterfuzz-testcase-minimized-ffmpeg_dem_AVI_fuzzer-6165716135968768
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit f733688d30021587c3f3a1b280d6ece8b04f26ff)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavformat/avidec.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/avidec.c b/libavformat/avidec.c index 7e08c3aab3..2e49fbeca1 100644 --- a/libavformat/avidec.c +++ b/libavformat/avidec.c @@ -1249,7 +1249,7 @@ start_sync: AVStream *st1 = s->streams[1]; AVIStream *ast1 = st1->priv_data; // workaround for broken small-file-bug402.avi - if ( d[2] == 'w' && d[3] == 'b' + if (ast1 && d[2] == 'w' && d[3] == 'b' && n == 0 && st ->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st1->codecpar->codec_type == AVMEDIA_TYPE_AUDIO |