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xtensa: fix potential NULL-pointer dereference

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Add missing check for memory allocation fail.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Kirill A. Shutemov 2013-11-14 14:31:19 -08:00 committed by Linus Torvalds
parent fecf3743b8
commit f8c6d30b76
1 changed files with 5 additions and 1 deletions
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6
arch/xtensa/include/asm/pgalloc.h
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@ -51,9 +51,13 @@ static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm,
static inline pgtable_t pte_alloc_one(struct mm_struct *mm,
unsigned long addr)
{
pte_t *pte;
struct page *page;
page = virt_to_page(pte_alloc_one_kernel(mm, addr));
pte = pte_alloc_one_kernel(mm, addr);
if (!pte)
return NULL;
page = virt_to_page(pte);
pgtable_page_ctor(page);
return page;
}