linux-kernel - Re: Dcache oops

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

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 3 Jun 2016 23:29:27 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Oleg Drokin <green@...uxhacker.ru>,
	"<linux-kernel@...r.kernel.org> Mailing List" 
	<linux-kernel@...r.kernel.org>,
	"<linux-fsdevel@...r.kernel.org>" <linux-fsdevel@...r.kernel.org>
Subject: Re: Dcache oops

On Fri, Jun 03, 2016 at 11:23:55PM +0100, Al Viro wrote:

> It's not that.  It's explicit put_link() in do_last(), followed by
> ESTALEOPEN and subsequent misbegotten "retry the last step on ESTALEOPEN"
> looking at now-freed nd->last.name.  IOW, the bug predates delayed_call
> stuff.

FWIW, I'd stepped into that in d63ff28f "namei: make should_follow_link() store
the link in nd->link", so it's 4.1+ mess.  delayed_call stuff is 4.4+...