diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index 2c9493011aec3a7996272fe8ee51253d5efca127..7b2c9e60dabcefa2e4b36919bdb12a4bb8a5a43d 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -3262,7 +3262,8 @@ int dbAllocBottomUp(struct inode *ip, s64 blkno, s64 nblocks)
 	}
 
 	/* write the last buffer. */
-	write_metapage(mp);
+	if (mp)
+		write_metapage(mp);
 
 	IREAD_UNLOCK(ipbmap);