netdev - Re: inet6_dump_fib lock held when returning to user space

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Message-ID: <1326976399.2249.4.camel@edumazet-HP-Compaq-6005-Pro-SFF-PC>
Date:	Thu, 19 Jan 2012 13:33:19 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Hans Schillstrom <hans.schillstrom@...csson.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: inet6_dump_fib  lock held when returning to user space

Le jeudi 19 janvier 2012 à 11:48 +0100, Hans Schillstrom a écrit :
> Hello
> Have this one been seen before ?
> It happens during a container start i.e. in a netns,
> 
> [   19.232941] ================================================
> [   19.268785] [ BUG: lock held when returning to user space! ]
> [   19.270146] 3.2.0+ #14 Tainted: G        W   
> [   19.271217] ------------------------------------------------
> [   19.272968] nsm/1042 is leaving the kernel with locks still held!
> [   19.274603] 1 lock held by nsm/1042:
> [   19.275524]  #0:  (rcu_read_lock){.+.+..}, at: [<ffffffff8136a9b2>] inet6_dump_fib+0xbd/0x34a
> 

Yep, Dave Jones reported this some days ago

"Re: recvmsg sleeping from invalid context"

I have no idea of what happens yet.


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