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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-09-09 23:23:20 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2019-12-31 19:51:55 +0100 |
| commit | 519532549fc35bbfe2f253cefbb67e63d1d31d7d (patch) | |
| tree | 04b19769af54d73b9cdb60da3e3e4db53155534c | |
| parent | c9754099e5451a5d614b5ee8dbf167011798b73b (diff) | |
| download | ffmpeg-519532549fc35bbfe2f253cefbb67e63d1d31d7d.tar.gz | |
avcodec/hevc_cabac: Tighten the limit on k in ff_hevc_cu_qp_delta_abs()
Values larger would fail subsequent tests.
Fixes: signed integer overflow: 5 + 2147483646 cannot be represented in type 'int'
Fixes: 16966/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_HEVC_fuzzer-5695709549953024
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 f63cd1963e36bc70211e072bac7eb3606cf85f14)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/hevc_cabac.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/libavcodec/hevc_cabac.c b/libavcodec/hevc_cabac.c index faa36d5459..8abb780dd7 100644 --- a/libavcodec/hevc_cabac.c +++ b/libavcodec/hevc_cabac.c @@ -642,11 +642,11 @@ int ff_hevc_cu_qp_delta_abs(HEVCContext *s) } if (prefix_val >= 5) { int k = 0; - while (k < CABAC_MAX_BIN && get_cabac_bypass(&s->HEVClc->cc)) { + while (k < 7 && get_cabac_bypass(&s->HEVClc->cc)) { suffix_val += 1 << k; k++; } - if (k == CABAC_MAX_BIN) { + if (k == 7) { av_log(s->avctx, AV_LOG_ERROR, "CABAC_MAX_BIN : %d\n", k); return AVERROR_INVALIDDATA; } |