Commit f8c6d30b authored Nov 14, 2013 by Kirill A. Shutemov Committed by Linus Torvalds Nov 15, 2013

xtensa: fix potential NULL-pointer dereference

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>

parent fecf3743

arch/xtensa/include/asm/pgalloc.h

+5 −1

Original line number	Diff line number	Diff line
		@@ -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;
		}