linux-kernel - Re: + sys_getppid-oopses-on-debug-kernel.patch added to -mm tree

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Date:	Tue, 8 Aug 2006 17:57:09 +0300
From:	Muli Ben-Yehuda <muli@...ibm.com>
To:	Björn Steinbrink <B.Steinbrink@....de>
Cc:	linux-kernel@...r.kernel.org, dev@...ru, dev@...nvz.org,
	stable@...nel.org
Subject: Re: + sys_getppid-oopses-on-debug-kernel.patch added to -mm tree

On Tue, Aug 08, 2006 at 04:51:38PM +0200, Björn Steinbrink wrote:

> There's a note right above the function that explains it:
>  * NOTE! This depends on the fact that even if we _do_
>  * get an old value of "parent", we can happily dereference
>  * the pointer (it was and remains a dereferencable kernel pointer
>  * no matter what): we just can't necessarily trust the result
>  * until we know that the parent pointer is valid.

Even without getting into just how ugly this is, is it really worth
it?

Cheers,
Muli
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