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| author | Michael Niedermayer <michael@niedermayer.cc> | 2021-09-19 21:51:28 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2021-10-12 16:46:06 +0200 |
| commit | 501f0aef5d9e6a55bb84b800c41694ea6f3585ed (patch) | |
| tree | c491fa1b7796869b568d3e2189ffcb97927ceb34 | |
| parent | bbbde5f077d08fae91d1bd06fecf64b436f927cc (diff) | |
| download | ffmpeg-501f0aef5d9e6a55bb84b800c41694ea6f3585ed.tar.gz | |
oavformat/avidec: Check offset in odml
Fixes: signed integer overflow: 9223372036854775807 + 8 cannot be represented in type 'long'
Fixes: 38787/clusterfuzz-testcase-minimized-ffmpeg_dem_AVI_fuzzer-4859845799444480
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 255a7b423ed5e07536bdc72e993056daa4efe009)
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 5b68e30034..7200b76e68 100644 --- a/libavformat/avidec.c +++ b/libavformat/avidec.c @@ -236,7 +236,7 @@ static int read_odml_index(AVFormatContext *s, int64_t frame_num) avio_rl32(pb); /* size */ duration = avio_rl32(pb); - if (avio_feof(pb)) + if (avio_feof(pb) || offset > INT64_MAX - 8) return AVERROR_INVALIDDATA; pos = avio_tell(pb); |