Re: [gentoo-dev] Re: Bleeding edge hardened-sources: move PaX markings from ELF to Extended Attributes

[Mike Frysinger <vapier@gentoo.org>]

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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  Is the "no" simply outdated, since reiserfs xattrs support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

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