[Devel] [PATCH rh7 v3 2/2] fs: Allow to mount ext4 and binfmt_misc under non-root ns

[Kirill Tkhai]

On 06.10.2015 23:30, Vladimir Davydov wrote:
> On Tue, Oct 06, 2015 at 12:35:51PM +0300, Kirill Tkhai wrote:
> ...
>> @@ -735,6 +735,8 @@ static int bm_fill_super(struct super_block * sb, void * data, int silent)
>>  static struct dentry *bm_mount(struct file_system_type *fs_type,
>>  	int flags, const char *dev_name, void *data)
>>  {
>> +	if (!current_user_ns_initial())
>> +		return ERR_PTR(-EPERM);
> 
> FWIW, I think we should use this new nice helper in dev_mount too
> instead of open-coding the ve->init_cred->user_ns check.

Good idea. I sent one more patch.
 
>>  	return mount_ns(fs_type, flags, get_exec_env(), bm_fill_super);
>>  }
>>