lists.openwall.net   lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:	Sun, 06 Feb 2011 23:28:56 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	Knut_Petersen@...nline.de
Cc:	linux-kernel@...r.kernel.org, paulus@...ba.org,
	mostrows@...thlink.net, linux-ppp@...r.kernel.org
Subject: Re: [BUG] 2.6.38-rc2: Circular Locking Dependency

From: Knut Petersen <Knut_Petersen@...nline.de>
Date: Mon, 24 Jan 2011 10:25:55 +0100

> As I was hunting something different I found the following (potential)
> problem on an openSuSE 11.3 system with kernel 2.6.38-rc2.
> The message is triggerd by smpppd starting a dsl connection.
> 
> Knut
> 
> 
>  NET: Registered protocol family 24
> 
>  =======================================================
>  [ INFO: possible circular locking dependency detected ]
>  2.6.38-rc2-kape #7
>  -------------------------------------------------------
>  pppd/2529 is trying to acquire lock:
>   (&(&pch->downl)->rlock){+.....}, at: [<f814a634>] ppp_push+0x59/0x4a8
> [ppp_generic]
> 
>  but task is already holding lock:
>   (&(&ppp->wlock)->rlock){+.-...}, at: [<f814ae1b>]
> ppp_xmit_process+0x19/0x451 [ppp_generic]
> 
>  which lock already depends on the new lock.

I've stared over this trace several times and can't figure out what
the problem is.

Paul, any idea?
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists

Powered by Openwall GNU/*/Linux - Powered by OpenVZ