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To: gentoo-dev@g.o
From: "Anthony G. Basile" <blueness@g.o>
Subject: Re: Re: Bleeding edge hardened-sources: move PaX markings from ELF to Extended Attributes
Date: Wed, 07 Dec 2011 20:03:22 -0500
On 12/07/2011 05:10 PM, Mike Frysinger wrote:
> On Friday 02 December 2011 00:16:43 Duncan wrote:
>> Longer:  Does reiserfs (v3) support xattrs and thus, presumably caps and
>> XT_PAX?  Kernel reiserfs options suggest yes, but everything I've read
>> elsewhere (including gentoo-dev caps project discussions) seems to
>> indicate no.  Is the "no" simply outdated, since reiserfs xattrs support
>> was added relatively late in the game, or is it still correct and I have
>> the purpose of those kernel options all wrong, or ???
> i found reiserfs useful in the ext2/ext3 days, but now i find it completely 
> irrelevant with ext4
>
>> If both reiserfs and tmpfs (my $PORTAGE_TMPDIR) support xattrs, both caps 
>> and XT_PAX should be good to go, correct?
> my understanding of libattr/libacl is that the userland interface is FS 
> independent.  once the FS supports xattrs (if the kernel says it does, i'd 
> believe that), then that should be all you need.
>
> while i've never tested xattrs on reiserfs (as alluded earlier, i've dropped 
> all my reiserfs usage in favor of ext4), but i know tmpfs works (once you've 
> enabled it in the kernel).
> -mike

I just tested with reiser3 and xattr works just fine.  Just make sure
its enabled in the kernel and when you mount the fs use option
user_xattr for the user. namespace.

-- 
Anthony G. Basile, Ph.D.
Gentoo Linux Developer [Hardened]
E-Mail    : blueness@g.o
GnuPG FP  : 8040 5A4D 8709 21B1 1A88  33CE 979C AF40 D045 5535
GnuPG ID  : D0455535



Replies:
Re: Bleeding edge hardened-sources: move PaX markings from ELF to Extended Attributes
-- Duncan
References:
Bleeding edge hardened-sources: move PaX markings from ELF to Extended Attributes
-- Anthony G. Basile
Re: Bleeding edge hardened-sources: move PaX markings from ELF to Extended Attributes
-- Duncan
Re: Re: Bleeding edge hardened-sources: move PaX markings from ELF to Extended Attributes
-- Mike Frysinger
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Updated Jun 29, 2012

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