linux-kernel - Re: [git pull] vfs fixes

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] [day] [month] [year] [list]

Message-ID: <20170415170841.GR29622@ZenIV.linux.org.uk>
Date:   Sat, 15 Apr 2017 18:08:42 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Vegard Nossum <vegard.nossum@...il.com>,
        LKML <linux-kernel@...r.kernel.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>
Subject: Re: [git pull] vfs fixes

On Sat, Apr 15, 2017 at 09:51:40AM -0700, Linus Torvalds wrote:
> On Fri, Apr 14, 2017 at 11:41 PM, Vegard Nossum <vegard.nossum@...il.com> wrote:
> >
> > I'm seeing the same memfd_create/name_to_handle_at/path_lookupat
> > use-after-free that Dmitry was seeing here:
> 
> Ok, see if that is gone in current git with commit c0eb027e5aef ("vfs:
> don't do RCU lookup of empty pathnames")

FWIW, I'm finishing testing of fixes for crap found during the discussion
of that stuff last week (making sure that mntns_install() can't be abused
into setting ->fs->root/->fs->pwd to dentry of NFS referral and its ilk
and doing that in a sane way).