linux-kernel - Re: post 2.6.21 regression in F

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Message-Id: <1178824463.7247.13.camel@dchapman.boston.redhat.com>
Date:	Thu, 10 May 2007 15:14:23 -0400
From:	Doug Chapman <doug.chapman@...com>
To:	linux-kernel@...r.kernel.org
Cc:	bfields@...i.umich.edu, hch@...radead.org, doug.chapman@...com
Subject: Re: post 2.6.21 regression in F_GETLK

On Thu, 2007-05-10 at 14:56 -0400, Doug Chapman wrote:
> A recent regression (introduced after 2.6.21) was caught by the LTP test
> fcntl11.  It appears that F_GETLK is not properly checking for existing
> F_RDLCK and allows taking out a write lock.
> 
> This can be demonstrated by either running fcntl11 from the LTP suite or
> I have hacked up a much shorter version which demonstrates the issue and
> am attaching it.
> 

I should add that I have seen this on ia64 and x86_64.  I do not
currently have any 32 bit systems to test on.

- Doug


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