From b6dc16bd95375e99a0a887496eb22071ff0001f2 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 18 Dec 2014 02:09:23 +0100 Subject: [PATCH] avcodec/hevc_ps: Check diff_cu_qp_delta_depth Fixes undefined behavior Fixes: asan_static-oob_17aa046_582_cov_1577759978_DBLK_G_VIXS_1.bit Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind Signed-off-by: Michael Niedermayer (cherry picked from commit 3281fa892599d71b4dc298a426af8296419cd90e) 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 d79740a949..0cd2269409 100644 --- a/libavcodec/hevc_ps.c +++ b/libavcodec/hevc_ps.c @@ -1257,6 +1257,14 @@ int ff_hevc_decode_nal_pps(HEVCContext *s) if (pps->cu_qp_delta_enabled_flag) pps->diff_cu_qp_delta_depth = get_ue_golomb_long(gb); + if (pps->diff_cu_qp_delta_depth < 0 || + pps->diff_cu_qp_delta_depth > sps->log2_diff_max_min_coding_block_size) { + av_log(s->avctx, AV_LOG_ERROR, "diff_cu_qp_delta_depth %d is invalid\n", + pps->diff_cu_qp_delta_depth); + ret = AVERROR_INVALIDDATA; + goto err; + } + pps->cb_qp_offset = get_se_golomb(gb); if (pps->cb_qp_offset < -12 || pps->cb_qp_offset > 12) { av_log(s->avctx, AV_LOG_ERROR, "pps_cb_qp_offset out of range: %d\n",