linux-kernel - Re: [PATCH] fix filp_cachep memory corruption

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Message-ID: <7033.1297562754@jrobl>
Date:	Sun, 13 Feb 2011 11:05:54 +0900
From:	"J. R. Okajima" <hooanon05@...oo.co.jp>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Nick Piggin <npiggin@...il.com>, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	viro@...iv.linux.org.uk
Subject: Re: [PATCH] fix filp_cachep memory corruption

Andrew Morton:
> Anyway, as Nick appears to have done a dump-and-run on the kernel
> project, I shall send your fix into Linus as-is.  Perhaps you or Nick
> could look into cleaning things up later on?

Before I say "I agree and will clean up", Linus did it and the refined
patch is already merged.
Reading his patch, I am afraid there exists a possibitily of a problem.
In creating a file (and in rcu-walk mode), if ->open returns ESTALE,
then the problem may happen in the next ref-walk mode because
intent.open.file is reset to NULL. But I don't know whether such ->open
exists currently or not.

J. R. Okajima
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