linux-kernel - Re: commit f8f559422b (KVM: MMU: fast invalidate all mmio sptes) causes hang

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: <20130717193826.GA360@x4>
Date:	Wed, 17 Jul 2013 21:38:26 +0200
From:	Markus Trippelsdorf <markus@...ppelsdorf.de>
To:	Xiao Guangrong <xiaoguangrong.eric@...il.com>
Cc:	Gleb Natapov <gleb@...hat.com>, kvm@...r.kernel.org,
	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Paolo Bonzini <pbonzini@...hat.com>,
	linux-kernel@...r.kernel.org
Subject: Re: commit f8f559422b (KVM: MMU: fast invalidate all mmio sptes)
 causes hang

On 2013.07.18 at 03:27 +0800, Xiao Guangrong wrote:
> 
> Could you please try this:
> 
> index 460b9c6..16d1578 100644
> --- a/arch/x86/kvm/mmu.c
> +++ b/arch/x86/kvm/mmu.c
> @@ -2952,6 +2952,9 @@ static bool page_fault_can_be_fast(u32 error_code)
>               !(error_code & PFERR_WRITE_MASK))
>                 return false;
>  
> +       if (error_code & PFERR_RSVD_MASK)
> +               return false;
> +
>         return true;
>  }

This fixes the issue for me. Many thanks Xiao.

-- 
Markus
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/