linux-kernel - Re: [PATCH v3] x86/ioperm: Fix io bitmap invalidation on Xen PV

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: <b419bbc1-5bff-2298-a2be-68c892b0999f@suse.com>
Date:   Sat, 18 Jul 2020 06:40:33 +0200
From:   Jürgen Groß <jgross@...e.com>
To:     Andy Lutomirski <luto@...nel.org>, x86@...nel.org
Cc:     Andrew Cooper <andrew.cooper3@...rix.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        stable@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v3] x86/ioperm: Fix io bitmap invalidation on Xen PV

On 18.07.20 01:53, Andy Lutomirski wrote:
> tss_invalidate_io_bitmap() wasn't wired up properly through the pvop
> machinery, so the TSS and Xen's io bitmap would get out of sync
> whenever disabling a valid io bitmap.
> 
> Add a new pvop for tss_invalidate_io_bitmap() to fix it.
> 
> This is XSA-329.
> 
> Cc: Juergen Gross <jgross@...e.com>
> Cc: Boris Ostrovsky <boris.ostrovsky@...cle.com>
> Cc: Stefano Stabellini <sstabellini@...nel.org>
> Cc: stable@...r.kernel.org
> Fixes: 22fe5b0439dd ("x86/ioperm: Move TSS bitmap update to exit to user work")
> Reviewed-by: Juergen Gross <jgross@...e.com>
> Reviewed-by: Thomas Gleixner <tglx@...utronix.de>
> Signed-off-by: Andy Lutomirski <luto@...nel.org>

Reviewed-by: Juergen Gross <jgross@...e.com>


Juergen