linux-kernel - Re: [PATCH] mm: vmscan: add BUG_ON on illegal return values from scan

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Date:	Mon, 20 May 2013 06:56:35 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	Oskar Andero <oskar.andero@...ymobile.com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Radovan Lekanovic <radovan.lekanovic@...ymobile.com>,
	David Rientjes <rientjes@...gle.com>,
	Glauber Costa <glommer@...nvz.org>,
	Dave Chinner <dchinner@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Hugh Dickins <hughd@...gle.com>
Subject: Re: [PATCH] mm: vmscan: add BUG_ON on illegal return values from
 scan_objects

On Mon, May 20, 2013 at 11:14:27AM +0200, Oskar Andero wrote:
> Add a BUG_ON to catch any illegal value from the shrinkers. This fixes a
> potential bug if scan_objects returns a negative other than -1, which
> would lead to undefined behaviour.

So it's better to crash a machine and keep anyone from using it?
Instead of recovering from an error you found?  Not good.

greg k-h
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