From 701c965a76069724d07ec57f3e1f9ca802138f29 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 25 Feb 2015 22:10:41 +0100 Subject: [PATCH] avcodec/hevc_ps: Check that log2_ctb_size is not smaller than the bounds of all profiles 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 Signed-off-by: Michael Niedermayer --- libavcodec/hevc_ps.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/libavcodec/hevc_ps.c b/libavcodec/hevc_ps.c index 65b3268c81..85ce2ccc87 100644 --- a/libavcodec/hevc_ps.c +++ b/libavcodec/hevc_ps.c @@ -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);