um: handle pgtable_page_ctor() fail
authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Thu, 14 Nov 2013 22:31:44 +0000 (14:31 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 15 Nov 2013 00:32:19 +0000 (09:32 +0900)
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Jeff Dike <jdike@addtoit.com>
Cc: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
arch/um/kernel/mem.c

index 7ddb64baf3270620ae608e4764407ccbfe36dd7b..8636e905426f195ab2e8e2600cfe719676f70178 100644 (file)
@@ -279,8 +279,12 @@ pgtable_t pte_alloc_one(struct mm_struct *mm, unsigned long address)
        struct page *pte;
 
        pte = alloc_page(GFP_KERNEL|__GFP_REPEAT|__GFP_ZERO);
-       if (pte)
-               pgtable_page_ctor(pte);
+       if (!pte)
+               return NULL;
+       if (!pgtable_page_ctor(pte)) {
+               __free_page(pte);
+               return NULL;
+       }
        return pte;
 }