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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-08-04 09:33:45 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-08-05 19:34:33 +0200 |
| commit | 8b8f5fd05e7e0c20b2fd12e8a4e9f2542eba7e3a (patch) | |
| tree | a7daad59f058c5d61305ae01e740dc880fc6dc02 | |
| parent | 889fdc690a3ff0166e24e3c6403bbd320041094a (diff) | |
| download | ffmpeg-8b8f5fd05e7e0c20b2fd12e8a4e9f2542eba7e3a.tar.gz | |
avcodec/mss3: Check for the rac stream being invalid in rac_normalize()
Fixes: out of array read
Fixes: 15982/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MSA1_fuzzer-5630676251967488
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 99a172f3f4d0bef024c6293f575caaaddce0b267)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/mss3.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/mss3.c b/libavcodec/mss3.c index 21226f9085..02bd360996 100644 --- a/libavcodec/mss3.c +++ b/libavcodec/mss3.c @@ -298,6 +298,10 @@ static void rac_normalise(RangeCoder *c) c->got_error = 1; c->low = 1; } + if (c->low > c->range) { + c->got_error = 1; + c->low = 1; + } if (c->range >= RAC_BOTTOM) return; } |