linux-kernel - Re: [PATCH 0/2] introduce get_task_exe_file and use it to fix audit_exe

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: <de6bbf24-31f7-7e3c-2774-dd1819c6847f@yandex-team.ru>
Date:   Tue, 23 Aug 2016 11:34:56 +0300
From:   Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
To:     Mateusz Guzik <mguzik@...hat.com>,
        Richard Guy Briggs <rgb@...hat.com>
Cc:     ebiederm@...ssion.com, oleg@...hat.com, sgrubb@...hat.com,
        pmoore@...hat.com, eparis@...hat.com, luto@...capital.net,
        linux-audit@...hat.com, linux-kernel@...r.kernel.org,
        Al Viro <viro@...iv.linux.org.uk>
Subject: Re: [PATCH 0/2] introduce get_task_exe_file and use it to fix
 audit_exe_compare

On 22.08.2016 23:51, Mateusz Guzik wrote:
> audit_exe_compare directly accesses mm->exe_file without making sure the
> object is stable. Fixing it using current primitives results in
> partially duplicating what proc_exe_link is doing.
>
> As such, introduce a trivial helper which can be used in both places and
> fix the func.

Looks good. Except trivial warning that test bot found.

Acked-by: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>

>
> Mateusz Guzik (2):
>   mm: introduce get_task_exe_file
>   audit: fix exe_file access in audit_exe_compare
>
>  fs/proc/base.c       |  7 +------
>  include/linux/mm.h   |  1 +
>  kernel/audit_watch.c |  8 +++++---
>  kernel/fork.c        | 24 ++++++++++++++++++++++++
>  4 files changed, 31 insertions(+), 9 deletions(-)
>


-- 
Konstantin