linux-kernel - Re: [PATCH] x86/mm: fix dump pagetables for 4 levels of page tables

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]

Message-ID: <20170412152808.mrzezql3tf554agk@node.shutemov.name>
Date:   Wed, 12 Apr 2017 18:28:08 +0300
From:   "Kirill A. Shutemov" <kirill@...temov.name>
To:     Juergen Gross <jgross@...e.com>
Cc:     linux-kernel@...r.kernel.org, x86@...nel.org, mingo@...hat.com,
        hpa@...or.com, tglx@...utronix.de, kirill.shutemov@...ux.intel.com
Subject: Re: [PATCH] x86/mm: fix dump pagetables for 4 levels of page tables

On Wed, Apr 12, 2017 at 04:36:34PM +0200, Juergen Gross wrote:
> Commit fdd3d8ce0ea62 ("x86/dump_pagetables: Add support for 5-level
> paging") introduced an error for dumping with only 4 levels by setting
> PGD_LEVEL_MULT to a wrong value.
> 
> This is leading to e.g. addresses printed as "(null)" for ranges:
> 
> x86/mm: Found insecure W+X mapping at address (null)/(null)
> 
> Signed-off-by: Juergen Gross <jgross@...e.com>

Sorry for this.

Reviewed-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>

-- 
 Kirill A. Shutemov