From mboxrd@z Thu Jan  1 00:00:00 1970
From: Al Viro <viro@ZenIV.linux.org.uk>
Subject: Re: Linux 2.6.26-rc4
Date: Tue, 3 Jun 2008 18:50:53 +0100
Message-ID: <20080603175053.GF28946@ZenIV.linux.org.uk>
References: <20080603105258.GV28946@ZenIV.linux.org.uk> <1212499623.3025.46.camel@raven.themaw.net> <alpine.LFD.1.10.0806030751040.3473@woody.linux-foundation.org> <1212509263.3025.66.camel@raven.themaw.net> <alpine.LFD.1.10.0806030926330.3473@woody.linux-foundation.org> <20080603164102.GB28946@ZenIV.linux.org.uk> <20080603165042.GC28946@ZenIV.linux.org.uk> <1212514104.3025.110.camel@raven.themaw.net> <20080603174125.GE28946@ZenIV.linux.org.uk> <1212514893.3025.123.camel@raven.themaw.net>
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Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Miklos Szeredi <miklos@szeredi.hu>, jesper@krogh.cc,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
To: Ian Kent <raven@themaw.net>
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On Wed, Jun 04, 2008 at 01:41:32AM +0800, Ian Kent wrote:

> OK, I'll need to look at vfs_readdir().
> I thought vfs_readdir() would take the containing directory mutex as
> does ->lookup().

vfs_readdir() takes i_mutex on directory it reads.  I.e. on the victim
in this case.  lookup has i_mutex on directory it does lookup in, i.e.
root in this case...