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hevc: Reject impossible slice segment

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A dependent slice cannot have address 0.
Prevent an out of array bound load in ff_hevc_cabac_init().

Sample-Id: 00001406-google
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
This commit is contained in:
Luca Barbato 2014-01-11 11:32:07 +01:00
parent 09e2203b8b
commit 816e5b9970
1 changed files with 5 additions and 0 deletions
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5
libavcodec/hevc.c
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@ -779,6 +779,11 @@ static int hls_slice_header(HEVCContext *s)
sh->slice_ctb_addr_rs = sh->slice_segment_addr;
if (!s->sh.slice_ctb_addr_rs && s->sh.dependent_slice_segment_flag) {
av_log(s->avctx, AV_LOG_ERROR, "Impossible slice segment.\n");
return AVERROR_INVALIDDATA;
}
s->HEVClc.first_qp_group = !s->sh.dependent_slice_segment_flag;
if (!s->pps->cu_qp_delta_enabled_flag)