Re: [RFC PATCH] fs: register_filesystem: Don't allow '\t' and '\n'.

[Johannes Weiner]

On Thu, Apr 09, 2009 at 08:18:20PM +0900, Tetsuo Handa wrote:
> Is it legal to use '\t' and '\n' in filesystem's name?
> If legal, we should use \ooo escape for /proc/filesystems .
> 
> ----------
> [RFC PATCH] fs: register_filesystem: Don't allow '\t' and '\n'.
> 
> Registering a filesystem with broken name
> 
>   static struct file_system_type dummy_fs_type = {
>           .name       = "a\tb\nc",
>   };
> 
> results in broken output
> 
>   # cat /proc/filesystems
>   nodev   sysfs
>   nodev   rootfs
>   nodev   bdev
>   nodev   proc
>   nodev   debugfs
>   nodev   sockfs
>   nodev   usbfs
>   nodev   pipefs
>   nodev   anon_inodefs
>   nodev   tmpfs
>   nodev   inotifyfs
>   nodev   devpts
>           ext3
>           ext2
>           cramfs
>   nodev   ramfs
>           vfat
>           iso9660
>   nodev   nfsd
>   nodev   smbfs
>   nodev   a       b
>   c
>   nodev   rpc_pipefs
> 
> Why not forbid '\t' and '\n'?

Which filesystem does that?  Shouldn't the filesystem get changed
instead?

	Hannes
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