Re: [PATCH] netfilter: xt_condition: add security capability support

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On Monday 2010-08-23 15:42, Luciano Coelho wrote:
>> >  /* Defaults, these can be overridden on the module command-line. */
>> >  static unsigned int condition_list_perms = S_IRUGO | S_IWUSR;
>> >  static unsigned int condition_uid_perms = 0;
>> >  static unsigned int condition_gid_perms = 0;
>> > +static unsigned int condition_capabilities = CAP_NET_ADMIN;
>> >
>> It is strange that we set security policy in this way. Maybe the
>> permission of the proc file is enough in this case.
>
>Yes, that is another way to do it.  But in our device we use security
>capabilities more extensively than normal file permissions.  That's why
>we need this.
>
>If this is too restrictive (ie. having CAP_NET_ADMIN) for most users, we
>could change the default value to no capabilities needed.  Then we can
>set CAP_NET_ADMIN when loading the module.

But it looks as strange as the Yama code attempt. This is the one time 
where I would personally be looking into SELinux, or perhaps SMACK if 
the former is too complex, to whether _t'ing off procfs is possible.
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