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avcodec/hevc: Check max ctb addresses for WPP 

Fixes out of array read
Fixes: 2f95ddd996db8a6281d2e18c184595a7/asan_heap-oob_192fe91_3330_58e4441181e30a66c19f743dcb392347.bit

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2015-11-28 13:42:05 +01:00
parent 79abf2d0de
commit dad354f38d
1 changed files with 9 additions and 0 deletions
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9
libavcodec/hevc.c
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@ -2452,6 +2452,15 @@ static int hls_slice_data_wpp(HEVCContext *s, const HEVCNAL *nal)
return AVERROR(ENOMEM);
}
if (s->sh.slice_ctb_addr_rs + s->sh.num_entry_point_offsets * s->ps.sps->ctb_width >= s->ps.sps->ctb_width * s->ps.sps->ctb_height) {
av_log(s->avctx, AV_LOG_ERROR, "WPP ctb addresses are wrong (%d %d %d %d)\n",
s->sh.slice_ctb_addr_rs, s->sh.num_entry_point_offsets,
s->ps.sps->ctb_width, s->ps.sps->ctb_height
);
res = AVERROR_INVALIDDATA;
goto error;
}
ff_alloc_entries(s->avctx, s->sh.num_entry_point_offsets + 1);
if (!s->sList[1]) {