linux-kernel - Re: post 2.6.21 regression in F

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Message-ID: <20070510193050.GQ13719@fieldses.org>
Date:	Thu, 10 May 2007 15:30:50 -0400
From:	"J. Bruce Fields" <bfields@...ldses.org>
To:	Doug Chapman <doug.chapman@...com>
Cc:	linux-kernel@...r.kernel.org, hch@...radead.org,
	Marc Eshel <eshel@...aden.ibm.com>
Subject: Re: post 2.6.21 regression in F_GETLK

On Thu, May 10, 2007 at 02:56:15PM -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.

Ouch.

> 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.
> 
> Using git bisect I came up with this commit as the one that introduced
> the issue.

Thanks for the report--investigating....

--b.
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