From: Bernard Pidoux <bpidoux@free•fr>
To: Jarek Poplawski <jarkao2@gmail•com>
Cc: Francois Romieu <romieu@fr•zoreil.com>,
Linux Netdev List <netdev@vger•kernel.org>,
Jarek Poplawski <jarkao2@o2•pl>
Subject: Re: [AX25] kernel panic
Date: Sun, 23 Mar 2008 18:00:17 +0100 [thread overview]
Message-ID: <47E68CA1.2040904@free.fr> (raw)
In-Reply-To: <20080322113620.GA3213@ami.dom.local>
Jarek Poplawski wrote:
> On Thu, Mar 20, 2008 at 11:58:35PM +0100, Bernard Pidoux wrote:
> ...
>> BUG: spinlock bad magic on CPU#0, swapper/0
>> BUG: unable to handle kernel paging request at virtual address 6b6b6c2f
>> printing eip: c01e730b *pde = 00000000
>> Oops: 0000 [#1] SMP
> ...
>> Pid: 0, comm: swapper Not tainted (2.6.24.3 #8)
>> EIP: 0060:[<c01e730b>] EFLAGS: 00010002 CPU: 0
>> EIP is at spin_bug+0xdb/0xf0
> ...
>
> Hi,
>
> Bernard, could you try this debugging patch?
>
> Thanks,
> Jarek P.
>
> ---
>
> diff -Nurp 2.6.24.3-/net/core/sock.c 2.6.24.3+/net/core/sock.c
> --- 2.6.24.3-/net/core/sock.c 2008-01-24 23:58:37.000000000 +0100
> +++ 2.6.24.3+/net/core/sock.c 2008-03-22 12:10:10.000000000 +0100
> @@ -1517,14 +1517,21 @@ static void sock_def_write_space(struct
> * progress. --DaveM
> */
> if ((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf) {
> - if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
> + if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) {
> + if (!sk->sk_socket || sk->sk_socket->sk != sk) {
> + WARN_ON_ONCE(1);
> + sk->sk_socket = NULL;
> + sk->sk_sleep = NULL;
> + goto out;
> + }
> wake_up_interruptible(sk->sk_sleep);
> + }
>
> /* Should agree with poll, otherwise some programs break */
> if (sock_writeable(sk))
> sk_wake_async(sk, 2, POLL_OUT);
> }
> -
> +out:
> read_unlock(&sk->sk_callback_lock);
> }
>
Hi Jarek,
Here is the result of your patch :
WARNING: at net/core/sock.c:1522 sock_def_write_space()
Pid: 3452, comm: mkiss Not tainted 2.6.24.3 #2
[<c010513a>] show_trace_log_lvl+0x1a/0x30
[<c0105b52>] show_trace+0x12/0x20
[<c01064ac>] dump_stack+0x6c/0x80
[<c024d54b>] sock_def_write_space+0x10b/0x120
[<c024d93a>] sock_wfree+0x3a/0x40
[<c024fafd>] skb_release_all+0x4d/0xf0
[<c024f2ab>] __kfree_skb+0xb/0x90
[<c024f349>] kfree_skb+0x19/0x30
[<c8cb5e37>] ax_xmit+0xf7/0x360 [mkiss]
[<c0255367>] dev_hard_start_xmit+0x207/0x270
[<c02657f4>] __qdisc_run+0x54/0x1a0
[<c0257bac>] dev_queue_xmit+0x25c/0x330
[<c8cc8a77>] ax25_queue_xmit+0x47/0x70 [ax25]
[<c8cc8b65>] ax25_transmit_buffer+0xc5/0x110 [ax25]
[<c8cc8c2d>] ax25_send_iframe+0x7d/0x110 [ax25]
[<c8cc8d70>] ax25_kick+0xb0/0x1b0 [ax25]
[<c8cc9e29>] ax25_std_frame_in+0x69/0x890 [ax25]
[<c8cc7dba>] ax25_kiss_rcv+0x2ba/0x7b0 [ax25]
[<c0254cc4>] netif_receive_skb+0x244/0x2e0
[<c0257835>] process_backlog+0x75/0xe0
[<c025734b>] net_rx_action+0x12b/0x1d0
[<c011d595>] __do_softirq+0x55/0xc0
[<c011d647>] do_softirq+0x47/0x50
[<c011d9f5>] local_bh_enable_ip+0x95/0xe0
[<c02babe5>] _spin_unlock_bh+0x25/0x30
[<c8cb56b0>] mkiss_receive_buf+0x360/0x420 [mkiss]
[<c020dfe7>] pty_write+0x47/0x60
[<c020b5b2>] write_chan+0x222/0x330
[<c0208c76>] tty_write+0x126/0x1b0
[<c01728df>] vfs_write+0xaf/0x120
[<c0172e2d>] sys_write+0x3d/0x70
[<c010412a>] sysenter_past_esp+0x5f/0xa5
=======================
Happy Easter,
Bernard Pidoux
next prev parent reply other threads:[~2008-03-23 17:00 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-03-18 10:44 [AX25] kernel panic Bernard Pidoux F6BVP
2008-03-18 21:25 ` Francois Romieu
2008-03-19 7:36 ` Bernard Pidoux F6BVP
2008-03-19 20:57 ` Bernard Pidoux
2008-03-20 7:30 ` Jarek Poplawski
2008-03-20 22:58 ` Bernard Pidoux
2008-03-21 0:28 ` Jarek Poplawski
2008-03-21 9:52 ` Bernard Pidoux
2008-03-21 11:22 ` Jarek Poplawski
2008-03-21 9:40 ` Bernard Pidoux
2008-03-22 11:36 ` Jarek Poplawski
2008-03-23 17:00 ` Bernard Pidoux [this message]
2008-03-24 20:51 ` Jarek Poplawski
2008-03-25 13:23 ` Bernard Pidoux
2008-03-25 20:51 ` Jarek Poplawski
2008-03-26 18:35 ` Jarek Poplawski
2008-03-28 8:24 ` Bernard Pidoux
2008-03-28 8:27 ` Bernard Pidoux
2008-03-28 12:07 ` Jarek Poplawski
2008-03-29 12:04 ` Bernard Pidoux
2008-03-29 12:24 ` Jarek Poplawski
2008-03-30 8:43 ` Bernard Pidoux
2008-03-30 9:16 ` Jarek Poplawski
2008-03-30 17:38 ` Bernard Pidoux
2008-03-30 18:49 ` Jarek Poplawski
2008-03-30 9:00 ` Bernard Pidoux
[not found] ` <47EE38BA.9090500@free.fr>
[not found] ` <20080329130451.GC3407@ami.dom.local>
[not found] ` <47EF6479.7030702@free.fr>
[not found] ` <20080330115958.GA4975@ami.dom.local>
2008-04-01 20:37 ` Bernard Pidoux
2008-04-02 6:41 ` [ROSE/AX25] af_rose: rose_release() fix Jarek Poplawski
2008-04-02 6:56 ` David Miller
-- strict thread matches above, loose matches on Subject: below --
2009-09-09 22:28 [AX25] kernel panic Bernard Pidoux
2009-09-11 19:21 ` Jarek Poplawski
2009-09-15 10:16 ` Bernard Pidoux
[not found] ` <20090910142436.GB10547@linux-mips.org>
[not found] ` <4AA9288B.2070205@upmc.fr>
[not found] ` <20090911120557.GA12175@linux-mips.org>
2009-09-20 8:42 ` Bernard Pidoux
2009-09-20 9:09 ` f8arr
2009-09-20 21:02 ` Jarek Poplawski
2009-09-21 8:44 ` Bernard Pidoux
2009-09-21 20:11 Jarek Poplawski
2009-09-23 21:17 ` Bernard Pidoux F6BVP
2009-09-24 8:07 ` Jarek Poplawski
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