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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-17 00:34:08 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-06-17 02:25:54 +0200 |
| commit | a2055f8e3f1411dc40ca52da1d42af7d8c6400d0 (patch) | |
| tree | 0e1afd46fea19ff2423759c7eb7741c6fc185671 | |
| parent | c00ef60abda2a8b16c49acefb938eb87ab7b40a3 (diff) | |
| download | ffmpeg-a2055f8e3f1411dc40ca52da1d42af7d8c6400d0.tar.gz | |
avcodec/hevcdec: Fix signed integer overflow in decode_lt_rps()
Fixes: runtime error: signed integer overflow: 2147483647 + 6 cannot be represented in type 'int'
Fixes: 2263/clusterfuzz-testcase-minimized-4800359627227136
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 1edbf5e20c75f06d6987bc823e63aa4e649ccddd)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/hevc.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/libavcodec/hevc.c b/libavcodec/hevc.c index 8d1851f368..f8aeb63aa1 100644 --- a/libavcodec/hevc.c +++ b/libavcodec/hevc.c @@ -271,12 +271,16 @@ static int decode_lt_rps(HEVCContext *s, LongTermRPS *rps, GetBitContext *gb) delta_poc_msb_present = get_bits1(gb); if (delta_poc_msb_present) { - int delta = get_ue_golomb_long(gb); + int64_t delta = get_ue_golomb_long(gb); + int64_t poc; if (i && i != nb_sps) delta += prev_delta_msb; - rps->poc[i] += s->poc - delta * max_poc_lsb - s->sh.pic_order_cnt_lsb; + poc = rps->poc[i] + s->poc - delta * max_poc_lsb - s->sh.pic_order_cnt_lsb; + if (poc != (int32_t)poc) + return AVERROR_INVALIDDATA; + rps->poc[i] = poc; prev_delta_msb = delta; } } |