diff options
| -rw-r--r-- | mm/mmap.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 937b44f0aac3..9c3f4f82a46e 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1095,6 +1095,7 @@ unsigned long mmap_region(struct file *file, unsigned long addr, { struct mm_struct *mm = current->mm; struct vm_area_struct *vma, *prev; + struct vm_area_struct *merged_vma; int correct_wcount = 0; int error; struct rb_node **rb_link, *rb_parent; @@ -1207,13 +1208,17 @@ munmap_back: if (vma_wants_writenotify(vma)) vma->vm_page_prot = vm_get_page_prot(vm_flags & ~VM_SHARED); - if (file && vma_merge(mm, prev, addr, vma->vm_end, - vma->vm_flags, NULL, file, pgoff, vma_policy(vma))) { + merged_vma = NULL; + if (file) + merged_vma = vma_merge(mm, prev, addr, vma->vm_end, + vma->vm_flags, NULL, file, pgoff, vma_policy(vma)); + if (merged_vma) { mpol_put(vma_policy(vma)); kmem_cache_free(vm_area_cachep, vma); fput(file); if (vm_flags & VM_EXECUTABLE) removed_exe_file_vma(mm); + vma = merged_vma; } else { vma_link(mm, vma, prev, rb_link, rb_parent); file = vma->vm_file; |