lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Thu, 4 Oct 2012 13:16:02 -0400 From: Nick Bowler <nbowler@...iptictech.com> To: Kees Cook <kees@...flux.net> Cc: Linus Torvalds <torvalds@...ux-foundation.org>, Theodore Ts'o <tytso@....edu>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: Linux 3.6 On 2012-10-04 09:14 -0700, Kees Cook wrote: > On Thu, Oct 04, 2012 at 12:03:54PM -0400, Nick Bowler wrote: > > On 2012-10-04 08:49 -0700, Kees Cook wrote: > > > On Thu, Oct 04, 2012 at 09:35:04AM -0400, Nick Bowler wrote: [...] > > > > The thing that bothers me most about all this is that it's basically > > > > impossible to see why things are failing without digging through the git > > > > tree or posting to the mailing list (or recalling earlier mailing list > > > > discussions about the restriction, as I vaguely do now). You just > > > > suddenly get "permission denied" errors when all the permissions > > > > involved look fine. As far as I know, the owner, group and mode of > > > > symlinks have always been completely meaningless. Upgrade to 3.6, and > > > > they're suddenly meaningful in extremely non-obvious ways. > > > > > > FWIW, there should have been an audit message about it in dmesg. > > > > There were zero messages in the kernel log. > > > > # dmesg -C > > # cd /tmp > > # mkdir testdir > > # ln -s testdir testlink > > # chown -h nobody testlink > > # cd testlink > > cd: permission denied: testlink > > # dmesg > > (no output) > > Well that's sad. :( Two situations I can think of for that: > - the kernel wasn't build with CONFIG_AUDIT Indeed, I do not have this option enabled. Why would I have it? The description says it's for SELinux, which I do not use. Cheers, -- Nick Bowler, Elliptic Technologies (http://www.elliptictech.com/) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists