[PATCH] NOMMU: Don't try and give NULL to fput()

From: Gavin Lambert <gavinl@compacsort.com>

Don't try and give NULL to fput() in the error handling in do_mmap_pgoff() as
it'll cause an oops.

Signed-Off-By: David Howells <dhowells@redhat.com>
---

 mm/nommu.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/mm/nommu.c b/mm/nommu.c
index fa6850e..1b35ab2 100644
--- a/mm/nommu.c
+++ b/mm/nommu.c
@@ -949,7 +949,8 @@ #endif
 	up_write(&nommu_vma_sem);
 	kfree(vml);
 	if (vma) {
-		fput(vma->vm_file);
+		if (vma->vm_file)
+			fput(vma->vm_file);
 		kfree(vma);
 	}
 	return ret;