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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2013-11-14 14:31:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-15 09:32:15 +0900
commitf8c6d30b766fc8eb83f5b7983ff8a5a9b3189365 (patch)
treebdad7b5f1c1014550936bc5617f8789a51e3cd52 /arch/xtensa
parentfecf3743b824ce4eb275ed4a1d6aee9494f6a966 (diff)
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>
Diffstat (limited to 'arch/xtensa')
-rw-r--r--arch/xtensa/include/asm/pgalloc.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/xtensa/include/asm/pgalloc.h b/arch/xtensa/include/asm/pgalloc.h
index cf914c8c249a..037671a655dc 100644
--- a/arch/xtensa/include/asm/pgalloc.h
+++ b/arch/xtensa/include/asm/pgalloc.h
@@ -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;
}