mm/fork: fix overflow in vma length when copying mmap on clone

[pandora-kernel.git] / kernel / fork.c

diff --git a/kernel/fork.c b/kernel/fork.c
index 26f1ab0..79ee71f 100644 (file)
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -352,7 +352,8 @@ static int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm)
                }
                charge = 0;
                if (mpnt->vm_flags & VM_ACCOUNT) {
-                       unsigned int len = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT;
+                       unsigned long len;
+                       len = (mpnt->vm_end - mpnt->vm_start) >> PAGE_SHIFT;
                        if (security_vm_enough_memory(len))
                                goto fail_nomem;
                        charge = len;