netdev - Re: [Bugme-new] [Bug 9132] New: fcntl GET_OWN reports 0 for sockets instead of PID

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Date:	Mon, 8 Oct 2007 10:11:29 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	ff@...g.com
Cc:	bugme-daemon@...zilla.kernel.org, netdev@...r.kernel.org
Subject: Re: [Bugme-new] [Bug 9132] New: fcntl GET_OWN reports 0 for sockets
 instead of PID


(please respond via emailed reply-to-all, not vie the bugzilla web interface)

On Mon,  8 Oct 2007 09:18:02 -0700 (PDT) bugme-daemon@...zilla.kernel.org wrote:

> http://bugzilla.kernel.org/show_bug.cgi?id=9132
> 
>            Summary: fcntl GET_OWN reports 0 for sockets instead of PID
>            Product: Networking
>            Version: 2.5
>      KernelVersion: 2.6.22
>           Platform: All
>         OS/Version: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: Other
>         AssignedTo: acme@...stprotocols.net
>         ReportedBy: ff@...g.com
> 
> 
> Most recent kernel where this bug did not occur: 2.6.22
> Distribution: Kubuntu
> Hardware Environment: VMWare workstation 6
> Software Environment: 
> Problem Description: calling fcntl with F_GETOWN on a socket gives allways zero
> instead of the PID of the socket. The fcntl code is right but the data is zero
> in the struct file element. It sounds like pid is not set when the socket is
> attached to the fd in sock_attach_fd() of net/socket.c.
> 
> I would add something like this:
> 
> file->f_owner.pid=find_get_pid(task->pid);
> file->f_owner.pid_type=PIDTYPE_PID;
> 
> in sock_attach_fd() of net/socket.c
> 
> Steps to reproduce:
> 
> s=socket(...);
> pid=fcntl(s, F_GETOWN);
> 

You state that the problem is present in 2.6.22 and also did not occur in
2.6.22.  I assume it has always been like this.
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