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-rw-r--r--mm/mmap.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c
index 2def55555e05..c3c5c1d6103d 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2674,6 +2674,8 @@ cannot_expand:
error = -EINVAL;
if (file)
goto close_and_free_vma;
+ else if (vma->vm_file)
+ goto unmap_and_free_vma;
else
goto free_vma;
}
@@ -2682,6 +2684,8 @@ cannot_expand:
error = -ENOMEM;
if (file)
goto close_and_free_vma;
+ else if (vma->vm_file)
+ goto unmap_and_free_vma;
else
goto free_vma;
}
@@ -2751,7 +2755,7 @@ unmap_and_free_vma:
/* Undo any partial mapping done by a device driver. */
unmap_region(mm, mas.tree, vma, prev, next, vma->vm_start, vma->vm_end);
- if (vm_flags & VM_SHARED)
+ if (file && (vm_flags & VM_SHARED))
mapping_unmap_writable(file->f_mapping);
free_vma:
vm_area_free(vma);