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hevc: Bound check slice_qp

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The T-REC-H.265-2013044 page 79 states they have to be into the range
[-s->sps->qp_bd_offset, 51].

Fixes: asan_stack-oob_eae8e3_9522_WP_MAIN10_B_Toshiba_3.bit
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Luca Barbato 2014-01-12 01:14:12 +01:00 committed by Michael Niedermayer
parent 48a5b15543
commit aead772b58
1 changed files with 11 additions and 1 deletions
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12
libavcodec/hevc.c
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@ -682,7 +682,17 @@ static int hls_slice_header(HEVCContext *s)
}
// Inferred parameters
sh->slice_qp = 26 + s->pps->pic_init_qp_minus26 + sh->slice_qp_delta;
sh->slice_qp = 26U + s->pps->pic_init_qp_minus26 + sh->slice_qp_delta;
if (sh->slice_qp > 51 ||
sh->slice_qp < -s->sps->qp_bd_offset) {
av_log(s->avctx, AV_LOG_ERROR,
"The slice_qp %d is outside the valid range "
"[%d, 51].\n",
sh->slice_qp,
-s->sps->qp_bd_offset);
return AVERROR_INVALIDDATA;
}
sh->slice_ctb_addr_rs = sh->slice_segment_addr;
s->HEVClc->first_qp_group = !s->sh.dependent_slice_segment_flag;