diff --git a/mm/filemap.c b/mm/filemap.c
index 7b84dc8..723d2ca 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2282,6 +2282,15 @@ __generic_file_aio_write_nolock(struct k
 
 		written = generic_file_direct_write(iocb, iov, &nr_segs, pos,
 							ppos, count, ocount);
+		if (written < 0) {
+			loff_t isize = i_size_read(inode);
+			/*
+			 * generic_file_direct_write() may have instantiated 
+			 * a few blocks outside i_size. Trim these off again.
+			 */
+			if (pos + count > isize)
+				vmtruncate(inode, isize);
+		}
 		if (written < 0 || written == count)
 			goto out;
 		/*