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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-08-04 09:33:45 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-07-01 12:11:55 +0200 |
| commit | a0cf2b8293238f6c10f7acc5a81496ded17ef81d (patch) | |
| tree | cd0bb1537716d75d417b74e75680729dabdcbfe5 | |
| parent | 712e9b8caaab2b00b0bf90bd44eb52f65c1d22cb (diff) | |
| download | ffmpeg-a0cf2b8293238f6c10f7acc5a81496ded17ef81d.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 8344bfe8a7..fa29fe6262 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; } |