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Date: Thu, 25 Aug 2011 10:42:44 +0400 From: Pavel Emelyanov <xemul@...allels.com> To: Andi Kleen <andi@...stfloor.org> CC: Zan Lynx <zlynx@....org>, Cyrill Gorcunov <gorcunov@...il.com>, Nathan Lynch <ntl@...ox.com>, Oren Laadan <orenl@...columbia.edu>, Daniel Lezcano <dlezcano@...ibm.com>, Tejun Heo <tj@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>, Glauber Costa <glommer@...allels.com>, "containers@...ts.osdl.org" <containers@...ts.osdl.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Serge Hallyn <serge.hallyn@...onical.com>, LINUXFS-ML <linux-fsdevel@...r.kernel.org>, James Bottomley <jbottomley@...allels.com> Subject: Re: [RFC] fs, proc: Introduce the /proc/<pid>/map_files/ directory v2 On 08/24/2011 09:36 PM, Andi Kleen wrote: > Pavel Emelyanov <xemul@...allels.com> writes: >> >> No and this is the trick - when you readlink it - it give you trash, but >> when you open one - you get exactly the same file as the map points to. > > Isn't that a minor security hole? > > For example if I pass a file descriptor into a chroot process for > reading, and with this interface you can open it for writing too. > I could see this causing problems. How does it differ from the /proc/pid/fd links? > -Andi > -- 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/
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