LKM programming - problem with chars from user space (?)

[authn <opacki@acn.waw.pl>]

Hello,
I am coding a linux kernel module and have problem with some string from user 
space (from execve system call). There is no problem with useing this string 
as a one, for example printk(KERN_ALERT "%s", string) works fine. 
Problem appears when i want to printk or compare single char, in first case it 
is printked with some extra '<1>' and in second case, when i compare it with 
other one, it doesnt fit to real char (it is "connected" with '<1>' in some 
way ?). I tried to copy it to kmalloced buffer:

if ((k_space=(char *)kmalloc(len, GFP_KERNEL))==NULL)
                        return -1;
memcpy_fromfs((void *)k_space, (void *)argv[argc], len); 

but then playing with k_space[i] was the same. Can anybody help me with this ?

Regards, 
apacz