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avcodec/hevc_ps: Check that log2_ctb_size is not smaller than the bounds of all profiles

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Fixes: unaligned memory access
Fixes: signal_sigsegv_3344165_576_cov_3406448105_DBLK_A_MAIN10_VIXS_2.bit

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Suggested-by: Christophe Gisquet <christophe.gisquet@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2015-02-25 22:10:41 +01:00
parent dd369c9adb
commit 701c965a76
1 changed files with 8 additions and 0 deletions
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8
libavcodec/hevc_ps.c
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@ -1083,6 +1083,14 @@ int ff_hevc_decode_nal_sps(HEVCContext *s)
av_log(s->avctx, AV_LOG_ERROR, "CTB size out of range: 2^%d\n", sps->log2_ctb_size);
goto err;
}
if (sps->log2_ctb_size < 4) {
av_log(s->avctx,
AV_LOG_ERROR,
"log2_ctb_size %d differs from the bounds of any known profile\n",
sps->log2_ctb_size);
avpriv_request_sample(s->avctx, "log2_ctb_size %d", sps->log2_ctb_size);
goto err;
}
if (sps->max_transform_hierarchy_depth_inter > sps->log2_ctb_size - sps->log2_min_tb_size) {
av_log(s->avctx, AV_LOG_ERROR, "max_transform_hierarchy_depth_inter out of range: %d\n",
sps->max_transform_hierarchy_depth_inter);