Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...

[pandora-kernel.git] / mm / memory.c

diff --git a/mm/memory.c b/mm/memory.c
index 11b9ca1..388dcf9 100644 (file)
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2670,6 +2670,10 @@ static int do_anonymous_page(struct mm_struct *mm, struct vm_area_struct *vma,
 
        pte_unmap(page_table);
 
+       /* File mapping without ->vm_ops ? */
+       if (vma->vm_flags & VM_SHARED)
+               return VM_FAULT_SIGBUS;
+
        /* Check if we need to add a guard page to the stack */
        if (check_stack_guard_page(vma, address) < 0)
                return VM_FAULT_SIGSEGV;
@@ -3099,6 +3103,9 @@ static int do_fault(struct mm_struct *mm, struct vm_area_struct *vma,
                        - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
 
        pte_unmap(page_table);
+       /* The VMA was not fully populated on mmap() or missing VM_DONTEXPAND */
+       if (!vma->vm_ops->fault)
+               return VM_FAULT_SIGBUS;
        if (!(flags & FAULT_FLAG_WRITE))
                return do_read_fault(mm, vma, address, pmd, pgoff, flags,
                                orig_pte);
@@ -3244,13 +3251,12 @@ static int handle_pte_fault(struct mm_struct *mm,
        barrier();
        if (!pte_present(entry)) {
                if (pte_none(entry)) {
-                       if (vma->vm_ops) {
-                               if (likely(vma->vm_ops->fault))
-                                       return do_fault(mm, vma, address, pte,
-                                                       pmd, flags, entry);
-                       }
-                       return do_anonymous_page(mm, vma, address,
-                                                pte, pmd, flags);
+                       if (vma->vm_ops)
+                               return do_fault(mm, vma, address, pte, pmd,
+                                               flags, entry);
+
+                       return do_anonymous_page(mm, vma, address, pte, pmd,
+                                       flags);
                }
                return do_swap_page(mm, vma, address,
                                        pte, pmd, flags, entry);
@@ -3726,7 +3732,7 @@ void print_vma_addr(char *prefix, unsigned long ip)
                if (buf) {
                        char *p;
 
-                       p = d_path(&f->f_path, buf, PAGE_SIZE);
+                       p = file_path(f, buf, PAGE_SIZE);
                        if (IS_ERR(p))
                                p = "?";
                        printk("%s%s[%lx+%lx]", prefix, kbasename(p),