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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-09 19:38:46 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-17 20:35:20 +0200 |
| commit | 98dff828d8b9bc7b8ed9ca54d74e6e2949eac00d (patch) | |
| tree | df278e0d04c8411a70459126a89b8c70e3ef6694 | |
| parent | 0246760e94510844918334cd0d1297ce297822b7 (diff) | |
| download | ffmpeg-98dff828d8b9bc7b8ed9ca54d74e6e2949eac00d.tar.gz | |
avcodec/cllc: Check prefix
Fixes: runtime error: left shift of 1610706944 by 1 places cannot be represented in type 'int'
Fixes: 1421/clusterfuzz-testcase-minimized-6239947507892224
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 62c5949beca2c95d6af5c74985467438d2295a66)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/cllc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/libavcodec/cllc.c b/libavcodec/cllc.c index 24fa168e36..97d3ae40ea 100644 --- a/libavcodec/cllc.c +++ b/libavcodec/cllc.c @@ -81,6 +81,10 @@ static int read_code_table(CLLCContext *ctx, GetBitContext *gb, VLC *vlc) count++; } + if (prefix > (65535 - 256)/2) { + vlc->table = NULL; + return AVERROR_INVALIDDATA; + } prefix <<= 1; } |