diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2013-11-14 14:31:19 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-15 09:32:15 +0900 |
| commit | f8c6d30b766fc8eb83f5b7983ff8a5a9b3189365 (patch) | |
| tree | bdad7b5f1c1014550936bc5617f8789a51e3cd52 | |
| parent | fecf3743b824ce4eb275ed4a1d6aee9494f6a966 (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>
| -rw-r--r-- | arch/xtensa/include/asm/pgalloc.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/xtensa/include/asm/pgalloc.h b/arch/xtensa/include/asm/pgalloc.h index cf914c8c249..037671a655d 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; } |