From: Wang Sheng-Hui <shhuiw@gmail.com>
Date: Thu, 22 Aug 2013 01:49:42 +0000 (-0400)
Subject: tile: add null check for kzalloc in tile/kernel/setup.c
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6d715790ef6b5b903779a14d995ce3d9e680bec0;p=linux-beck.git

tile: add null check for kzalloc in tile/kernel/setup.c

Should check the return value of kzalloc first to avoid the null pointer.
Then can dereference the non-null pointer to access the fields of struct
resource.

Signed-off-by: Wang Sheng-Hui <shhuiw@gmail.com>
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
---

diff --git a/arch/tile/kernel/setup.c b/arch/tile/kernel/setup.c
index 128a2d0b8650..c2c42f329c1a 100644
--- a/arch/tile/kernel/setup.c
+++ b/arch/tile/kernel/setup.c
@@ -1643,6 +1643,8 @@ insert_non_bus_resource(void)
 {
 	struct resource *res =
 		kzalloc(sizeof(struct resource), GFP_ATOMIC);
+	if (!res)
+		return NULL;
 	res->name = "Non-Bus Physical Address Space";
 	res->start = (1ULL << 32);
 	res->end = -1LL;
@@ -1660,6 +1662,8 @@ insert_ram_resource(u64 start_pfn, u64 end_pfn, bool reserved)
 {
 	struct resource *res =
 		kzalloc(sizeof(struct resource), GFP_ATOMIC);
+	if (!res)
+		return NULL;
 	res->name = reserved ? "Reserved" : "System RAM";
 	res->start = start_pfn << PAGE_SHIFT;
 	res->end = (end_pfn << PAGE_SHIFT) - 1;