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Commit 6d715790 authored by Wang Sheng-Hui's avatar Wang Sheng-Hui Committed by Chris Metcalf
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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: default avatarWang Sheng-Hui <shhuiw@gmail.com>
Signed-off-by: default avatarChris Metcalf <cmetcalf@tilera.com>
parent ce61cdc2

arch/tile/kernel/setup.c

+4 −0
Original line number Diff line number Diff line
@@ -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;