netdev - Re: [Bugme-new] [Bug 9149] New: accept() doesn't wake with error when socket descriptor closed

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Date:	Fri, 12 Oct 2007 10:06:45 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	mkielar@....pl
Cc:	bugme-daemon@...zilla.kernel.org, netdev@...r.kernel.org
Subject: Re: [Bugme-new] [Bug 9149] New: accept() doesn't wake with error
 when socket descriptor closed

On Fri, 12 Oct 2007 07:42:06 -0700 (PDT) bugme-daemon@...zilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=9149
> 
>            Summary: accept() doesn't wake with error when socket descriptor
>                     closed
>            Product: Networking
>            Version: 2.5
>      KernelVersion: 2.6.18
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: IPV4
>         AssignedTo: shemminger@...ux-foundation.org
>         ReportedBy: mkielar@....pl
> 
> 
> Most recent kernel where this bug did not occur: no idea
> Distribution: no idea - remote server
> Hardware Environment: i686
> Software Environment: no idea - probably pure console server
> 
> Problem Description:
> In multithreaded process, one thread launches accept() on a valid-so-far
> listening socket file descriptor sockfd and waits on it. After this second
> thread launches close( sockfd ). First thread further waits on accept() even
> though the descriptor is now invalid. accept() should wake up and return with
> -1 and errno EBADF.
> 

I have a feeling this is an FAQ, but I forget what the answer is?
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