| From | "Kirill A. Shutemov" <> | Subject | [PATCH 04/34] xtensa: fix potential NULL-pointer dereference | Date | Thu, 10 Oct 2013 21:05:29 +0300 |
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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> --- arch/xtensa/include/asm/pgalloc.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/xtensa/include/asm/pgalloc.h b/arch/xtensa/include/asm/pgalloc.h index cf914c8c24..037671a655 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; } -- 1.8.4.rc3
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