clear-pkgs-linux-iot-lts2018/1035-media-pci-Fix-improper-use-of-pointer-before-check.patch

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: "Wood, Brian J" <brian.j.wood@intel.com>
Date: Thu, 14 Mar 2019 15:34:34 -0700
Subject: [PATCH] media: pci: Fix improper use of pointer before check

This fixes the case where the function get_mem_sub_system()
returns NULL and the use of wrapper_base pointer.

Tracked-On:PKT-1813
Change-Id: I8a3e73b83a43f747dfa6fb3401c05a0eecf5bd96
Signed-off-by: Wood, Brian J <brian.j.wood@intel.com>
---
 drivers/media/pci/intel/ipu-wrapper.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/media/pci/intel/ipu-wrapper.c b/drivers/media/pci/intel/ipu-wrapper.c
index 47fa06202fdd..047c1f2ee2cf 100644
--- a/drivers/media/pci/intel/ipu-wrapper.c
+++ b/drivers/media/pci/intel/ipu-wrapper.c
@@ -307,6 +307,11 @@ u32 shared_memory_map(unsigned int ssid, unsigned int mmid, u64 addr)
 	struct my_css_memory_buffer_item *buf = NULL;
 	unsigned long flags;
 
+	if (!mine) {
+		pr_err("Invalid mem subsystem, return NULL");
+		return NULL;
+	}
+
 	if ((void *)(unsigned long)addr == &alloc_cookie)
 		return 0;
 
-- 
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