linux-kernel - Re: [PATCH 12/14] userns: On ppc convert current_uid from a kuid before printing.

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Message-ID: <20120926175629.GE30620@sergelap>
Date:	Wed, 26 Sep 2012 12:56:29 -0500
From:	Serge Hallyn <serge.hallyn@...onical.com>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	linux-security-module@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Linux Containers <containers@...ts.linux-foundation.org>,
	linux-kernel@...r.kernel.org, Paul Mackerras <paulus@...ba.org>
Subject: Re: [PATCH 12/14] userns: On ppc convert current_uid from a kuid
 before printing.

Quoting Eric W. Biederman (ebiederm@...ssion.com):
> From: "Eric W. Biederman" <ebiederm@...ssion.com>
> 
> Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
> Cc: Paul Mackerras <paulus@...ba.org>

Acked-by: Serge E. Hallyn <serge.hallyn@...ntu.com>

> Signed-off-by: "Eric W. Biederman" <ebiederm@...ssion.com>
> ---
>  arch/powerpc/mm/fault.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
> index 08ffcf5..e5f028b 100644
> --- a/arch/powerpc/mm/fault.c
> +++ b/arch/powerpc/mm/fault.c
> @@ -470,7 +470,7 @@ bad_area_nosemaphore:
>  	if (is_exec && (error_code & DSISR_PROTFAULT))
>  		printk_ratelimited(KERN_CRIT "kernel tried to execute NX-protected"
>  				   " page (%lx) - exploit attempt? (uid: %d)\n",
> -				   address, current_uid());
> +				   address, from_kuid(&init_user_ns, current_uid()));
>  
>  	return SIGSEGV;
>  
> -- 
> 1.7.5.4
> 
> _______________________________________________
> Containers mailing list
> Containers@...ts.linux-foundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/containers
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