From a84a844720ae41e456bf8603f89dce17393bab94 Mon Sep 17 00:00:00 2001
From: Andrew Wesie <andrew@theori.io>
Date: Fri, 16 Oct 2020 12:29:02 +0100
Subject: [PATCH] [PATCH] codecparsers: h264parser: guard against
 ref_pic_markings overflow

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1703>

Gbp-Pq: Name 02_ref_pic_markings_overflow.patch
---
 gst-libs/gst/codecparsers/gsth264parser.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/gst-libs/gst/codecparsers/gsth264parser.c b/gst-libs/gst/codecparsers/gsth264parser.c
index 73968db..b65b90f 100644
--- a/gst-libs/gst/codecparsers/gsth264parser.c
+++ b/gst-libs/gst/codecparsers/gsth264parser.c
@@ -712,13 +712,17 @@ gst_h264_slice_parse_dec_ref_pic_marking (GstH264SliceHdr * slice,
 
       dec_ref_pic_m->n_ref_pic_marking = 0;
       while (1) {
-        refpicmarking =
-            &dec_ref_pic_m->ref_pic_marking[dec_ref_pic_m->n_ref_pic_marking];
-
         READ_UE (nr, mem_mgmt_ctrl_op);
         if (mem_mgmt_ctrl_op == 0)
           break;
 
+        if (dec_ref_pic_m->n_ref_pic_marking >=
+            G_N_ELEMENTS (dec_ref_pic_m->ref_pic_marking))
+          goto error;
+
+        refpicmarking =
+            &dec_ref_pic_m->ref_pic_marking[dec_ref_pic_m->n_ref_pic_marking];
+
         refpicmarking->memory_management_control_operation = mem_mgmt_ctrl_op;
 
         if (mem_mgmt_ctrl_op == 1 || mem_mgmt_ctrl_op == 3)
-- 
2.30.2