linux-kernel - Re: [RFC, PATCH] fix SEM

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Date:	Thu, 03 Apr 2008 21:31:57 +0200
From:	Manfred Spraul <manfred@...orfullife.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	"Serge E. Hallyn" <serue@...ibm.com>, xemul@...nvz.org,
	linux-kernel@...r.kernel.org, sukadev@...ibm.com,
	ebiederm@...ssion.com, Nadia Derbey <Nadia.Derbey@...l.net>,
	Pierre Peiffer <peifferp@...il.com>
Subject: Re: [RFC, PATCH] fix SEM_UNDO with namespaces

Andrew Morton wrote:
>>
>> Absolutely.
>>
>>     
>
> Guys, what's the status here?
>
> afaict Manfred has identified an available-to-unprivileged-apps kernel
> memory corrupter?  If so, we should fix it asap for 2.6.25.  And for
> 2.6.24.x if it's also present there.
>
>   
No, it's a priveledged-only memory corruption:
> int unshare_nsproxy_namespaces(unsigned long unshare_flags,
>                 struct nsproxy **new_nsp, struct fs_struct *new_fs)
> {
>         int err = 0;
> [snip]
>         if (!capable(CAP_SYS_ADMIN))
>                 return -EPERM;

> Manfred's patch doesn't come close to applying against the 2.6.26 IPC
> things which we have queued but that's OK - bugfixes come first.
>   
Where can I find the queued changes? Are they in -mm?

--
    Manfred
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