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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-12-15 18:17:13 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-01-31 22:56:14 +0100 |
| commit | 4eb24ae083bc1659804ce66ba75ecbd71dd33911 (patch) | |
| tree | 43bb9cf6543cd79010655b6e3fab01d1612ed20b | |
| parent | f75e2cb0594624859970244b1bae12a5b2035068 (diff) | |
| download | ffmpeg-4eb24ae083bc1659804ce66ba75ecbd71dd33911.tar.gz | |
avcodec/hevc_cabac: Fix integer overflow in ff_hevc_cu_qp_delta_abs()
Fixes: signed integer overflow: 2147483647 + 1073741824 cannot be represented in type 'int'
Fixes: 4555/clusterfuzz-testcase-minimized-4505532481142784
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 0ee143558d55b590774dba69cff5a16eda089a4d)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/hevc_cabac.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/libavcodec/hevc_cabac.c b/libavcodec/hevc_cabac.c index d1bef8320f..99e6731d5d 100644 --- a/libavcodec/hevc_cabac.c +++ b/libavcodec/hevc_cabac.c @@ -633,8 +633,10 @@ int ff_hevc_cu_qp_delta_abs(HEVCContext *s) suffix_val += 1 << k; k++; } - if (k == CABAC_MAX_BIN) + if (k == CABAC_MAX_BIN) { av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", k); + return AVERROR_INVALIDDATA; + } while (k--) suffix_val += get_cabac_bypass(&s->HEVClc->cc) << k; |