Patchwork ax25 rose Re: kernel panic linux-2.6.27-rc7

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Submitter Jarek Poplawski
Date Oct. 3, 2008, 7:34 a.m.
Message ID <20081003073418.GA5235@ff.dom.local>
Download mbox | patch
Permalink /patch/2527/
State Superseded
Delegated to: David Miller
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Comments

Jarek Poplawski - Oct. 3, 2008, 7:34 a.m.
On 02-10-2008 21:48, Jarek Poplawski wrote:
> On Thu, Oct 02, 2008 at 08:20:18PM +0200, Bernard, f6bvp wrote:
...
>> Although I did not change anything, and contrarily to my previous
>> observation, the system instability as shown above occurs
>> systematically.
>> There was no problem with Kernel 2.6.25-10 I was using before (with
>> patches for AX25 and ROSE that are now included in 2.6.27-rc7).

Then it could be useful to try our luck with reverting some other
"suspicious" changes added in the meantime. My first candidate is
attached below. (So you could test this with vanilla 2.6.27-rc7 or
later, with or without any of the patches in this thread, and the
patch below reverted.)

>> I did not try 2.6.26 on this machine, thus I cannot tell if the bug was
>> already present.
>> Would it be worth to test 2.6.26 ?   
> 
> Yes, but only if you think you can do it safely.

This is still valid (it can wait).

Jarek P.

-------->

commit 30902dc3cb0ea1cfc7ac2b17bcf478ff98420d74
Author: David S. Miller <davem@davemloft.net>
Date:   Tue Jun 17 21:26:37 2008 -0700

    ax25: Fix std timer socket destroy handling.
    
    Tihomir Heidelberg - 9a4gl, reports:
    
    --------------------
    I would like to direct you attention to one problem existing in ax.25
    kernel since 2.4. If listening socket is closed and its SKB queue is
    released but those sockets get weird. Those "unAccepted()" sockets
    should be destroyed in ax25_std_heartbeat_expiry, but it will not
    happen. And there is also a note about that in ax25_std_timer.c:
    /* Magic here: If we listen() and a new link dies before it
    is accepted() it isn't 'dead' so doesn't get removed. */
    
    This issue cause ax25d to stop accepting new connections and I had to
    restarted ax25d approximately each day and my services were unavailable.
    Also netstat -n -l shows invalid source and device for those listening
    sockets. It is strange why ax25d's listening socket get weird because of
    this issue, but definitely when I solved this bug I do not have problems
    with ax25d anymore and my ax25d can run for months without problems.
    --------------------
    
    Actually as far as I can see, this problem is even in releases
    as far back as 2.2.x as well.
    
    It seems senseless to special case this test on TCP_LISTEN state.
    Anything still stuck in state 0 has no external references and
    we can just simply kill it off directly.
    
    Signed-off-by: David S. Miller <davem@davemloft.net>

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Jarek Poplawski - Oct. 3, 2008, 7:43 a.m.
On Fri, Oct 03, 2008 at 07:34:18AM +0000, Jarek Poplawski wrote:
> On 02-10-2008 21:48, Jarek Poplawski wrote:
> > On Thu, Oct 02, 2008 at 08:20:18PM +0200, Bernard, f6bvp wrote:
> ...
> >> Although I did not change anything, and contrarily to my previous
> >> observation, the system instability as shown above occurs
> >> systematically.
> >> There was no problem with Kernel 2.6.25-10 I was using before (with
> >> patches for AX25 and ROSE that are now included in 2.6.27-rc7).
> 
> Then it could be useful to try our luck with reverting some other
> "suspicious" changes added in the meantime. My first candidate is
> attached below. (So you could test this with vanilla 2.6.27-rc7 or
> later, with or without any of the patches in this thread, and the
> patch below reverted.)

Hmm... Of course, you could do this other way as well: 2.6.25-10 etc.
with this patch applied.

Jarek P.

> 
> >> I did not try 2.6.26 on this machine, thus I cannot tell if the bug was
> >> already present.
> >> Would it be worth to test 2.6.26 ?   
> > 
> > Yes, but only if you think you can do it safely.
> 
> This is still valid (it can wait).
> 
> Jarek P.
> 
> -------->
> 
> commit 30902dc3cb0ea1cfc7ac2b17bcf478ff98420d74
> Author: David S. Miller <davem@davemloft.net>
> Date:   Tue Jun 17 21:26:37 2008 -0700
> 
>     ax25: Fix std timer socket destroy handling.
>     
>     Tihomir Heidelberg - 9a4gl, reports:
>     
>     --------------------
>     I would like to direct you attention to one problem existing in ax.25
>     kernel since 2.4. If listening socket is closed and its SKB queue is
>     released but those sockets get weird. Those "unAccepted()" sockets
>     should be destroyed in ax25_std_heartbeat_expiry, but it will not
>     happen. And there is also a note about that in ax25_std_timer.c:
>     /* Magic here: If we listen() and a new link dies before it
>     is accepted() it isn't 'dead' so doesn't get removed. */
>     
>     This issue cause ax25d to stop accepting new connections and I had to
>     restarted ax25d approximately each day and my services were unavailable.
>     Also netstat -n -l shows invalid source and device for those listening
>     sockets. It is strange why ax25d's listening socket get weird because of
>     this issue, but definitely when I solved this bug I do not have problems
>     with ax25d anymore and my ax25d can run for months without problems.
>     --------------------
>     
>     Actually as far as I can see, this problem is even in releases
>     as far back as 2.2.x as well.
>     
>     It seems senseless to special case this test on TCP_LISTEN state.
>     Anything still stuck in state 0 has no external references and
>     we can just simply kill it off directly.
>     
>     Signed-off-by: David S. Miller <davem@davemloft.net>
> 
> diff --git a/net/ax25/ax25_std_timer.c b/net/ax25/ax25_std_timer.c
> index 96e4b92..cdc7e75 100644
> --- a/net/ax25/ax25_std_timer.c
> +++ b/net/ax25/ax25_std_timer.c
> @@ -39,11 +39,9 @@ void ax25_std_heartbeat_expiry(ax25_cb *ax25)
>  
>  	switch (ax25->state) {
>  	case AX25_STATE_0:
> -		/* Magic here: If we listen() and a new link dies before it
> -		   is accepted() it isn't 'dead' so doesn't get removed. */
> -		if (!sk || sock_flag(sk, SOCK_DESTROY) ||
> -		    (sk->sk_state == TCP_LISTEN &&
> -		     sock_flag(sk, SOCK_DEAD))) {
> +		if (!sk ||
> +		    sock_flag(sk, SOCK_DESTROY) ||
> +		    sock_flag(sk, SOCK_DEAD)) {
>  			if (sk) {
>  				sock_hold(sk);
>  				ax25_destroy_socket(ax25);
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Bernard Pidoux F6BVP - Oct. 4, 2008, 6:30 p.m.
Jarek,

Following your indications I did it both ways !
Without commit 30902dc3cb0ea1cfc7ac2b17bcf478ff98420d74 patch
kernel-2.6.27-rc7 is no longer subject to kernel panic when running ROSE
applications.
Reversely, when this patch is applied to rose-patched 2.6.25.10 kernel,
this one reboots a few seconds after ROSE application are started.
Otherwise it is very stable.
I checked about three times this behaviour for both kernels with and
without the incriminated patch.
This confirms without doubt that it is responsible of observed kernel
panic.
Is there however a possibility to find a solution to cure the problem
this patch was dedicated to ? 

Bernard


Le vendredi 03 octobre 2008 à 07:43 +0000, Jarek Poplawski a écrit :
> On Fri, Oct 03, 2008 at 07:34:18AM +0000, Jarek Poplawski wrote:
> > On 02-10-2008 21:48, Jarek Poplawski wrote:
> > > On Thu, Oct 02, 2008 at 08:20:18PM +0200, Bernard, f6bvp wrote:
> > ...
> > >> Although I did not change anything, and contrarily to my previous
> > >> observation, the system instability as shown above occurs
> > >> systematically.
> > >> There was no problem with Kernel 2.6.25-10 I was using before (with
> > >> patches for AX25 and ROSE that are now included in 2.6.27-rc7).
> > 
> > Then it could be useful to try our luck with reverting some other
> > "suspicious" changes added in the meantime. My first candidate is
> > attached below. (So you could test this with vanilla 2.6.27-rc7 or
> > later, with or without any of the patches in this thread, and the
> > patch below reverted.)
> 
> Hmm... Of course, you could do this other way as well: 2.6.25-10 etc.
> with this patch applied.
> 
> Jarek P.
> 
> > 
> > >> I did not try 2.6.26 on this machine, thus I cannot tell if the bug was
> > >> already present.
> > >> Would it be worth to test 2.6.26 ?   
> > > 
> > > Yes, but only if you think you can do it safely.
> > 
> > This is still valid (it can wait).
> > 
> > Jarek P.
> > 
> > -------->
> > 
> > commit 30902dc3cb0ea1cfc7ac2b17bcf478ff98420d74
> > Author: David S. Miller <davem@davemloft.net>
> > Date:   Tue Jun 17 21:26:37 2008 -0700
> > 
> >     ax25: Fix std timer socket destroy handling.
> >     
> >     Tihomir Heidelberg - 9a4gl, reports:
> >     
> >     --------------------
> >     I would like to direct you attention to one problem existing in ax.25
> >     kernel since 2.4. If listening socket is closed and its SKB queue is
> >     released but those sockets get weird. Those "unAccepted()" sockets
> >     should be destroyed in ax25_std_heartbeat_expiry, but it will not
> >     happen. And there is also a note about that in ax25_std_timer.c:
> >     /* Magic here: If we listen() and a new link dies before it
> >     is accepted() it isn't 'dead' so doesn't get removed. */
> >     
> >     This issue cause ax25d to stop accepting new connections and I had to
> >     restarted ax25d approximately each day and my services were unavailable.
> >     Also netstat -n -l shows invalid source and device for those listening
> >     sockets. It is strange why ax25d's listening socket get weird because of
> >     this issue, but definitely when I solved this bug I do not have problems
> >     with ax25d anymore and my ax25d can run for months without problems.
> >     --------------------
> >     
> >     Actually as far as I can see, this problem is even in releases
> >     as far back as 2.2.x as well.
> >     
> >     It seems senseless to special case this test on TCP_LISTEN state.
> >     Anything still stuck in state 0 has no external references and
> >     we can just simply kill it off directly.
> >     
> >     Signed-off-by: David S. Miller <davem@davemloft.net>
> > 
> > diff --git a/net/ax25/ax25_std_timer.c b/net/ax25/ax25_std_timer.c
> > index 96e4b92..cdc7e75 100644
> > --- a/net/ax25/ax25_std_timer.c
> > +++ b/net/ax25/ax25_std_timer.c
> > @@ -39,11 +39,9 @@ void ax25_std_heartbeat_expiry(ax25_cb *ax25)
> >  
> >  	switch (ax25->state) {
> >  	case AX25_STATE_0:
> > -		/* Magic here: If we listen() and a new link dies before it
> > -		   is accepted() it isn't 'dead' so doesn't get removed. */
> > -		if (!sk || sock_flag(sk, SOCK_DESTROY) ||
> > -		    (sk->sk_state == TCP_LISTEN &&
> > -		     sock_flag(sk, SOCK_DEAD))) {
> > +		if (!sk ||
> > +		    sock_flag(sk, SOCK_DESTROY) ||
> > +		    sock_flag(sk, SOCK_DEAD)) {
> >  			if (sk) {
> >  				sock_hold(sk);
> >  				ax25_destroy_socket(ax25);
> 

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Jarek Poplawski - Oct. 4, 2008, 8:09 p.m.
On Sat, Oct 04, 2008 at 09:11:14PM +0200, Jarek Poplawski wrote:
...
> BTW, I think there is an additional, not serious problem with freeing
> unorphaned sockets by netrom (as seen in your debugging logs with non
> zero in the 2-nd, and 6 in the 3-rd column). So, it would be nice to
> check if my #4 patch could help for this. (You need then 2.6.27-rc
> with patches #1(debugging), #3, #4 as signed in my previous message,
> and of course above mentioned one reverted).

BTW, could you please test it with and without the #4 (af_netrom) patch?

Jarek P.
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Bernard Pidoux F6BVP - Oct. 5, 2008, 3:40 p.m.
With kernel-2.6.27-rc7 and ypur patches including netrom one I observed
three events via netconsole.
I think that they were triggered by NetRom activity I exercized on
purpose.
See attached documents.

Bernard

Le samedi 04 octobre 2008 à 22:09 +0200, Jarek Poplawski a écrit :
> On Sat, Oct 04, 2008 at 09:11:14PM +0200, Jarek Poplawski wrote:
> ...
> > BTW, I think there is an additional, not serious problem with freeing
> > unorphaned sockets by netrom (as seen in your debugging logs with non
> > zero in the 2-nd, and 6 in the 3-rd column). So, it would be nice to
> > check if my #4 patch could help for this. (You need then 2.6.27-rc
> > with patches #1(debugging), #3, #4 as signed in my previous message,
> > and of course above mentioned one reverted).
> 
> BTW, could you please test it with and without the #4 (af_netrom) patch?
> 
> Jarek P.
>
AX25_DBG: c4056cc8, 00000000, 1, 1, 0
AX25_DBG: c64db008, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c6457338, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 1, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c4056cc8, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c4056cc8, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c4056cc8, 00000000, 1, 2, 0
AX25_DBG: c4056cc8, 00000000, 1, 2, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 0, 0
AX25_DBG: c4056cc8, 00000000, 1, 2, 0
AX25_DBG: c4056cc8, 00000000, 1, 2, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 1, 0
AX25_DBG: c64db008, 00000000, 1, 0, 0
AX25_DBG: c4056cc8, 00000000, 1, 1, 0
AX25_DBG: c4056cc8, 00000000, 1, 2, 0
AX25_DBG: c4056cc8, 00000000, 1, 2, 0
AX25_DBG: c4056cc8, 00000000, 1, 2, 0
AX25_DBG: c4056cc8, 00000000, 1, 2, 0
AX25_DBG: c6bbf668, 00000000, 2, 2, 17
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c6bbf668, 00000000, 2, 2, 17
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c6bbf668, 00000000, 2, 2, 17
AX25_DBG: c6796c38, 00000000, 2, 1, 6
AX25_DBG: c669e690, 00000000, 10, 1, 6
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6796648, 00000000, 2, 1, 6
AX25_DBG: c669ece8, 00000000, 10, 1, 6
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c6bbf668, 00000000, 2, 2, 17
AX25_DBG: c647e058, 00000000, 10, 2, 17
AX25_DBG: c67cc0e0, 00000000, 3, 2, 240
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c6457338, 00000000, 1, 0, 0
AX25_DBG: c64db008, 00000000, 1, 1, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c64db008, 00000000, 1, 2, 0
AX25_DBG: c6bbf668, 00000000, 2, 2, 17
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c6457338, 00000000, 1, 1, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c6457338, 00000000, 1, 1, 0
AX25_DBG: c6bbf668, 00000000, 2, 2, 17
AX25_DBG: c4056998, 00000000, 1, 2, 0
AX25_DBG: c4056998, 00000000, 1, 2, 0
AX25_DBG: c4056668, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 0, 0
AX25_DBG: c4056008, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056008, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056008, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056008, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056008, 00000000, 1, 0, 0
AX25_DBG: c4056338, 00000000, 1, 0, 0
AX25_DBG: c4056008, 00000000, 1, 1, 0
AX25_DBG: c4056338, 00000000, 1, 0, 0
AX25_DBG: c4056008, 00000000, 1, 1, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056998, 00000000, 1, 0, 0
AX25_DBG: c4056668, 00000000, 1, 1, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c647e058, 00000000, 10, 2, 17
AX25_DBG: c40419b0, 00000000, 3, 2, 240
AX25_DBG: c4000930, 00000000, 6, 5, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c647e058, 00000000, 10, 2, 17
AX25_DBG: c4040120, 00000000, 3, 2, 240
AX25_DBG: c67030a0, 00000000, 6, 5, 0
AX25_DBG: c4056668, 00000000, 1, 2, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c647e058, 00000000, 10, 2, 17
AX25_DBG: c4000930, 00000000, 3, 2, 240
AX25_DBG: c40419b0, 00000000, 6, 5, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c40419b0, 00000000, 6, 5, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c4000930, 00000000, 6, 5, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c67030a0, 00000000, 6, 5, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c4056998, 00000000, 1, 2, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c647e058, 00000000, 10, 2, 17
AX25_DBG: c67030a0, 00000000, 3, 2, 240
AX25_DBG: c4040d68, 00000000, 6, 5, 0
AX25_DBG: c4056998, 00000000, 1, 2, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c647e058, 00000000, 10, 2, 17
AX25_DBG: c40419b0, 00000000, 3, 2, 240
AX25_DBG: c4040120, 00000000, 6, 5, 0
AX25_DBG: c4056998, 00000000, 1, 2, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c647e058, 00000000, 10, 2, 17
AX25_DBG: c4040d68, 00000000, 3, 2, 240
AX25_DBG: c67030a0, 00000000, 6, 5, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c40874a0, 00000000, 11, 5, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c4000d48, 00000000, 3, 2, 207
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c4000d48, 00000000, 3, 2, 207
AX25_DBG: c67eadc8, 00000000, 17, 10, 0
AX25_DBG: c40bf7a0, 00000000, 11, 5, 0
AX25_DBG: c40eb618, 00000000, 3, 5, 240
AX25_DBG: c40eade8, 00000000, 3, 5, 240
AX25_DBG: c40ea5b8, 00000000, 3, 5, 240
AX25_DBG: c40d1a50, 00000000, 3, 5, 240
AX25_DBG: c6796c38, 00000000, 2, 1, 6
AX25_DBG: c40d1220, 00000000, 6, 5, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c4000d48, 00000000, 3, 2, 207
AX25_DBG: c67e9620, 00000000, 11, 5, 0
AX25_DBG: c40945d0, 00000000, 11, 5, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c67ea180, 00000000, 3, 2, 207
AX25_DBG: c67ea180, 00000000, 6, 5, 0
AX25_DBG: c4000d48, 00000000, 3, 5, 240
AX25_DBG: c40bce28, 00000000, 11, 5, 0
AX25_DBG: c40e2cc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c40e2cc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c6750cc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c6750cc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4040120, 00000000, 16, 3, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c4040120, 00000000, 16, 3, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c4040120, 00000000, 16, 3, 0
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c6bbf038, 00000000, 2, 2, 17
AX25_DBG: c4019cc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c4019cc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c40b9838, 00000000, 2, 1, 6
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c408bcc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c408bcc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c40ccf28, 00000000, 11, 5, 0
AX25_DBG: c40bd0e0, 00000000, 11, 5, 0
AX25_DBG: c40cd740, 00000000, 11, 5, 0
AX25_DBG: c40c4ea8, 00000000, 11, 5, 0
AX25_DBG: c40ccf28, 00000000, 11, 5, 0
AX25_DBG: c40c4ea8, 00000000, 11, 5, 0
AX25_DBG: c40c76e0, 00000000, 11, 5, 0
AX25_DBG: c4049100, 00000000, 11, 5, 0
AX25_DBG: c40eb200, 00000000, 16, 3, 9
AX25_DBG: c7bb4cc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c7bb4cc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c40eb200, 00000000, 16, 3, 9
AX25_DBG: c40eb200, 00000000, 16, 3, 9
AX25_DBG: c4056998, 00000000, 1, 2, 0
AX25_DBG: c40eb200, 00000000, 16, 3, 9
AX25_DBG: c40eb200, 00000000, 16, 3, 9
AX25_DBG: c4056998, 00000000, 1, 2, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c40eb200, 00000000, 16, 3, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c40eb200, 00000000, 16, 3, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c40eb200, 00000000, 16, 3, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c40ef858, 00000000, 2, 1, 6
AX25_DBG: c40ef878, 00000000, 2, 1, 6
AX25_DBG: c40ee0b8, 00000000, 2, 1, 6
AX25_DBG: c40c76e0, 00000000, 11, 5, 0
ROSE: rose_kill_by_neigh() - neighbour->use-- could be < 0
ROSE: rose_kill_by_neigh() - neighbour->use-- could be < 0
ROSE: rose_kill_by_neigh() - neighbour->use-- could be < 0
ROSE: rose_kill_by_neigh() - neighbour->use-- could be < 0
ROSE: rose_kill_by_neigh() - neighbour->use-- could be < 0
ROSE: rose_kill_by_neigh() - neighbour->use-- could be < 0
ROSE: rose_kill_by_neigh() - neighbour->use-- could be < 0
AX25_DBG: c67e8e08, 00000000, 11, 5, 0
AX25_DBG: c67e8e08, 00000000, 11, 5, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c7bb4cb8, 00000000, 2, 2, 17
AX25_DBG: c409bcc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c409bcc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c7bb4cb8, 00000000, 2, 2, 17
AX25_DBG: c7bb4cb8, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
BUG: spinlock trylock failure on UP on CPU#0, fpacstat/3752
 lock: c7b58d44, .magic: dead4ead, .owner: fpacstat/3752, .owner_cpu: 0
Pid: 3752, comm: fpacstat Not tainted 2.6.27-rc7 #3
 [<c01e9a4a>] spin_bug+0x8a/0xe0
 [<c01e9ac5>] _raw_spin_trylock+0x25/0x50
 [<c02bfbde>] _spin_trylock+0xe/0x50
 [<c0265562>] netpoll_send_skb+0x132/0x190
 [<c0265a5d>] netpoll_send_udp+0x1ed/0x200
 [<c8a7217c>] write_msg+0x9c/0xe0 [netconsole]
 [<c8a720e0>] ? write_msg+0x0/0xe0 [netconsole]
 [<c011d5e7>] __call_console_drivers+0x47/0x60
 [<c011d679>] _call_console_drivers+0x79/0x90
 [<c011da50>] release_console_sem+0xc0/0x1e0
 [<c011e000>] vprintk+0x290/0x3c0
 [<c014023c>] ? __lock_acquire+0x37c/0x9b0
 [<c013b8eb>] ? trace_hardirqs_off+0xb/0x10
 [<c011e14b>] printk+0x1b/0x20
 [<c024e5ac>] sk_free+0x3c/0x130
 [<c02500cd>] sock_wfree+0x2d/0x40
 [<c02524ba>] skb_release_all+0x3a/0x90
 [<c0251c5b>] __kfree_skb+0xb/0x90
 [<c0251cf9>] kfree_skb+0x19/0x30
 [<c89e1f74>] ei_start_xmit+0x164/0x330 [8390]
 [<c8ac9580>] ? packet_rcv_spkt+0x0/0x110 [af_packet]
 [<c0257de0>] dev_hard_start_xmit+0x210/0x280
 [<c0257c1a>] ? dev_hard_start_xmit+0x4a/0x280
 [<c0267fed>] __qdisc_run+0x16d/0x1e0
 [<c025a708>] dev_queue_xmit+0x1c8/0x4d0
 [<c025a57b>] ? dev_queue_xmit+0x3b/0x4d0
 [<c0121e0b>] ? local_bh_enable_ip+0x6b/0xb0
 [<c0260559>] neigh_resolve_output+0xe9/0x290
 [<c0121e0b>] ? local_bh_enable_ip+0x6b/0xb0
 [<c025e8ac>] neigh_update+0x23c/0x420
 [<c0121e0b>] ? local_bh_enable_ip+0x6b/0xb0
 [<c02676c0>] ? eth_header_cache_update+0x0/0x20
 [<c0294f6f>] arp_process+0x2ff/0x670
 [<c0294c70>] ? arp_process+0x0/0x670
 [<c026cd56>] ? nf_hook_slow+0xe6/0x100
 [<c0294c70>] ? arp_process+0x0/0x670
 [<c02953a9>] arp_rcv+0xc9/0x120
 [<c0294c70>] ? arp_process+0x0/0x670
 [<c02952e0>] ? arp_rcv+0x0/0x120
 [<c0257742>] netif_receive_skb+0x232/0x2e0
 [<c02575ea>] ? netif_receive_skb+0xda/0x2e0
 [<c025a163>] process_backlog+0x63/0xc0
 [<c02599ee>] net_rx_action+0x13e/0x1d0
 [<c0259910>] ? net_rx_action+0x60/0x1d0
 [<c0121ce5>] __do_softirq+0x55/0xc0
 [<c0121d96>] do_softirq+0x46/0x50
 [<c0122107>] irq_exit+0x57/0x70
 [<c010639f>] do_IRQ+0x4f/0xa0
 [<c01e5d14>] ? trace_hardirqs_off_thunk+0xc/0x18
 [<c01045e4>] common_interrupt+0x28/0x30
 [<c013007b>] ? sys_timer_delete+0x10b/0x110
 [<c0140bfc>] ? lock_release+0xac/0x1c0
 [<c017e2bf>] do_select+0x13f/0x5a0
 [<c017e180>] ? do_select+0x0/0x5a0
 [<c017ec80>] ? __pollwait+0x0/0xd0
 [<c0117fa0>] ? default_wake_function+0x0/0x10
 [<c014023c>] ? __lock_acquire+0x37c/0x9b0
 [<c013f0dc>] ? validate_chain+0xbc/0xea0
 [<c013b8eb>] ? trace_hardirqs_off+0xb/0x10
 [<c014023c>] ? __lock_acquire+0x37c/0x9b0
 [<c016d116>] ? poison_obj+0x26/0x50
 [<c016d116>] ? poison_obj+0x26/0x50
 [<c016d3be>] ? cache_free_debugcheck+0xce/0x230
 [<c016d3be>] ? cache_free_debugcheck+0xce/0x230
 [<c013ea4f>] ? debug_check_no_locks_freed+0x6f/0x120
 [<c013e94d>] ? trace_hardirqs_on_caller+0xbd/0x140
 [<c013e9db>] ? trace_hardirqs_on+0xb/0x10
 [<c013e94d>] ? trace_hardirqs_on_caller+0xbd/0x140
 [<c013e9db>] ? trace_hardirqs_on+0xb/0x10
 [<c014023c>] ? __lock_acquire+0x37c/0x9b0
 [<c013b8eb>] ? trace_hardirqs_off+0xb/0x10
 [<c01e6146>] ? copy_from_user+0x46/0x80
 [<c017e90a>] core_sys_select+0x1ea/0x330
 [<c017e74d>] ? core_sys_select+0x2d/0x330
 [<c01e6408>] ? copy_to_user+0x48/0x60
 [<c024c980>] ? move_addr_to_user+0x60/0x70
 [<c024cbf1>] ? sys_recvfrom+0xa1/0xd0
 [<c013b8eb>] ? trace_hardirqs_off+0xb/0x10
 [<c013b970>] ? lock_release_holdtime+0x80/0xb0
 [<c017ee1b>] sys_select+0xcb/0x190
 [<c01e5d04>] ? trace_hardirqs_on_thunk+0xc/0x10
 [<c0103bbd>] sysenter_do_call+0x12/0x35
 =======================
AX25_DBG: c40ef898, 00000000, 2, 1, 6
AX25_DBG: c40ef8b8, 00000000, 2, 1, 6
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c40ef2c8, 00000000, 2, 1, 6
AX25_DBG: c40e3cc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c40e3cc8, 00000000, 1, 0, 0
AX25_DBG: c4056998, 00000000, 1, 1, 0
AX25_DBG: c40e3998, 00000000, 1, 0, 0
AX25_DBG: c40e3cc8, 00000000, 1, 1, 0
AX25_DBG: c40e3998, 00000000, 1, 0, 0
AX25_DBG: c40e3cc8, 00000000, 1, 1, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c40ef2c8, 00000000, 2, 1, 6
AX25_DBG: c40ef8b8, 00000000, 2, 1, 6
AX25_DBG: c40eecd8, 00000000, 2, 1, 6
AX25_DBG: c67e8e08, 00000000, 11, 5, 0
AX25_DBG: c40c76e0, 00000000, 11, 5, 0
AX25_DBG: c67e8e08, 00000000, 11, 5, 0
AX25_DBG: c67e8e08, 00000000, 11, 5, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c40ee0f8, 00000000, 2, 1, 6
AX25_DBG: c67e8e08, 00000000, 11, 5, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c40d05d8, 00000000, 16, 3, 0
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
AX25_DBG: c6bbf350, 00000000, 2, 2, 17
------------------------------
Sun Oct  5 14:08:13 CEST 2008
------------------------------
AX25_DBG: c7bb4058, 00000000, 2, 2, 17
AX25_DBG: c40ccf28, 00000000, 11, 5, 0
AX25_DBG: c40e2080, 00000000, 16, 3, 9
AX25_DBG: c4120998, 00000000, 1, 0, 0
AX25_DBG: c4120cc8, 00000000, 1, 1, 0
AX25_DBG: c4120998, 00000000, 1, 0, 0
AX25_DBG: c4120cc8, 00000000, 1, 1, 0
AX25_DBG: c40e2080, 00000000, 16, 3, 9
AX25_DBG: c40e2080, 00000000, 16, 3, 9
AX25_DBG: c4120cc8, 00000000, 1, 2, 0
AX25_DBG: c40e2080, 00000000, 16, 3, 9
AX25_DBG: c40e2080, 00000000, 16, 3, 9
AX25_DBG: c4120cc8, 00000000, 1, 2, 0
AX25_DBG: c40c4ea8, 00000000, 11, 5, 0
AX25_DBG: c4135300, 00000000, 11, 5, 0
AX25_DBG: c40ccf28, 00000000, 11, 5, 0
AX25_DBG: c4135320, 00000000, 11, 5, 0
AX25_DBG: c4145958, 00000000, 2, 1, 6
AX25_DBG: c40ccf28, 00000000, 11, 5, 0
AX25_DBG: c40e3910, 00000000, 6, 5, 0
AX25_DBG: c40e2cc8, 00000000, 6, 5, 0
AX25_DBG: c4135340, 00000000, 11, 5, 0
AX25_DBG: c40c4ea8, 00000000, 11, 5, 0
AX25_DBG: c4135360, 00000000, 11, 5, 0
AX25_DBG: c40c4ea8, 00000000, 11, 5, 0
AX25_DBG: c40e2cc8, 00000000, 6, 5, 0
AX25_DBG: c4144350, 00000000, 11, 5, 0
AX25_DBG: c4135978, 00000000, 2, 1, 6
AX25_DBG: c40ccf28, 00000000, 11, 5, 0
BUG: unable to handle kernel paging request at 6b6b6b6a
IP: [<c01e9aa8>] _raw_spin_trylock+0x8/0x50
*pde = 00000000 
Oops: 0000 [#1] 
Modules linked in: netrom rose mkiss crc16 ax25 netconsole configfs nfsd exportfs nfs lockd nfs_acl sunrpc af_packet snd_seq_dummy ipv6 snd_seq_oss snd_seq_midi_event snd_seq snd_pcm_oss snd_mixer_oss binfmt_misc loop usb_storage scsi_mod floppy usbhid snd_ens1371 snd_rawmidi snd_seq_device snd_ac97_codec snd_pcm uhci_hcd snd_timer snd soundcore snd_page_alloc intel_agp usbcore ac97_bus ide_cd_mod agpgart ne2k_pci 8390 ext3 jbd ide_disk piix ide_core [last unloaded: nf_conntrack]

Pid: 0, comm: swapper Not tainted (2.6.27-rc7 #3)
EIP: 0060:[<c01e9aa8>] EFLAGS: 00010046 CPU: 0
EIP is at _raw_spin_trylock+0x8/0x50
EAX: 6b6b6b6a EBX: 00000000 ECX: 6b6b6b6a EDX: 00000000
ESI: 6b6b6b6a EDI: 00000292 EBP: c038be60 ESP: c038be5c
 DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068
Process swapper (pid: 0, ti=c038a000 task=c03633a0 task.ti=c038a000)
Stack: 6b6b6b7a c038be84 c02c044b 00000000 00000002 00000000 c01263a5 6b6b6b6b 
       6b6b6b6a c40e3ad0 c038be9c c01263a5 c038bea4 c40e3ad0 00000000 c40e3ad0 
       c038beb0 c012640a 00000286 c40e3910 c40e3910 c038beb8 c8ca0efd c038bed4 
Call Trace:
 [<c02c044b>] ? _spin_lock_irqsave+0x4b/0x80
 [<c01263a5>] ? lock_timer_base+0x25/0x50
 [<c01263a5>] ? lock_timer_base+0x25/0x50
 [<c012640a>] ? del_timer+0x3a/0x80
 [<c8ca0efd>] ? ax25_stop_heartbeat+0xd/0x10 [ax25]
 [<c8ca1dad>] ? ax25_destroy_socket+0x1d/0x1e0 [ax25]
 [<c8ca0816>] ? ax25_std_heartbeat_expiry+0xd6/0xe0 [ax25]
 [<c8ca10fb>] ? ax25_heartbeat_expiry+0x1b/0x40 [ax25]
 [<c0125e29>] ? run_timer_softirq+0x149/0x1b0
 [<c8ca10e0>] ? ax25_heartbeat_expiry+0x0/0x40 [ax25]
 [<c8ca10e0>] ? ax25_heartbeat_expiry+0x0/0x40 [ax25]
 [<c0121ce5>] ? __do_softirq+0x55/0xc0
 [<c0121d96>] ? do_softirq+0x46/0x50
 [<c0122107>] ? irq_exit+0x57/0x70
 [<c010639f>] ? do_IRQ+0x4f/0xa0
 [<c01e5d14>] ? trace_hardirqs_off_thunk+0xc/0x18
 [<c01045e4>] ? common_interrupt+0x28/0x30
 [<c01091b8>] ? default_idle+0x38/0x50
 [<c010269d>] ? cpu_idle+0x3d/0x80
 [<c02b8858>] ? rest_init+0x48/0x50
 =======================
Code: d2 33 c0 e8 ab 46 f3 ff 85 db 8b 4e 08 74 8c 8b 93 dc 00 00 00 8d 83 04 02 00 00 eb 88 8d b6 00 00 00 00 55 89 c1 89 e5 53 31 db <8b> 00 c7 01 00 00 00 00 84 c0 0f 9f c3 85 db 75 17 89 c8 ba b8 
EIP: [<c01e9aa8>] _raw_spin_trylock+0x8/0x50 SS:ESP 0068:c038be5c
Kernel panic - not syncing: Fatal exception in interrupt
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad350, 00000000, 2, 2, 17
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c58ad350, 00000000, 2, 2, 17
AX25_DBG: c58ad350, 00000000, 2, 2, 17
AX25_DBG: c62d6668, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6668, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6668, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6668, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c5dfa078, 00000000, 2, 1, 6
AX25_DBG: c584a038, 00000000, 10, 1, 6
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c62d6668, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6668, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c5dfa078, 00000000, 2, 1, 6
AX25_DBG: c584a038, 00000000, 10, 1, 6
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c62b8320, 00000000, 16, 3, 0
AX25_DBG: c7ade058, 00000000, 10, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c62eecc8, 00000000, 1, 0, 0
AX25_DBG: c62d6668, 00000000, 1, 1, 0
AX25_DBG: c62eecc8, 00000000, 1, 0, 0
AX25_DBG: c62d6668, 00000000, 1, 1, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 1, 0
AX25_DBG: c62d6668, 00000000, 1, 2, 0
AX25_DBG: c62d6668, 00000000, 1, 2, 0
AX25_DBG: c62eecc8, 00000000, 1, 0, 0
AX25_DBG: c62d6668, 00000000, 1, 1, 0
AX25_DBG: c62eecc8, 00000000, 1, 0, 0
AX25_DBG: c62d6668, 00000000, 1, 1, 0
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c5f35300, 00000000, 16, 3, 0
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c62d6668, 00000000, 1, 2, 0
AX25_DBG: c62d6cc8, 00000000, 1, 1, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c5f1e998, 00000000, 1, 2, 0
AX25_DBG: c5f1e998, 00000000, 1, 2, 0
AX25_DBG: c62b8320, 00000000, 16, 3, 0
AX25_DBG: c7ade058, 00000000, 10, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c5f172e0, 00000000, 16, 3, 0
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c5f172e0, 00000000, 16, 3, 0
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c5f172e0, 00000000, 16, 3, 0
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c5f172e0, 00000000, 16, 3, 0
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c5f172e0, 00000000, 16, 3, 0
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c5f172e0, 00000000, 16, 3, 0
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
BUG: spinlock trylock failure on UP on CPU#0, swapper/0
 lock: c653f194, .magic: dead4ead, .owner: swapper/0, .owner_cpu: 0
Pid: 0, comm: swapper Not tainted 2.6.27-rc7 #3
 [<c01e9a4a>] spin_bug+0x8a/0xe0
 [<c01e9ac5>] _raw_spin_trylock+0x25/0x50
 [<c02bfbde>] _spin_trylock+0xe/0x50
 [<c0265562>] netpoll_send_skb+0x132/0x190
 [<c0265a5d>] netpoll_send_udp+0x1ed/0x200
 [<c8afd17c>] write_msg+0x9c/0xe0 [netconsole]
 [<c8afd0e0>] ? write_msg+0x0/0xe0 [netconsole]
 [<c011d5e7>] __call_console_drivers+0x47/0x60
 [<c011d679>] _call_console_drivers+0x79/0x90
 [<c011da50>] release_console_sem+0xc0/0x1e0
 [<c011e000>] vprintk+0x290/0x3c0
 [<c014023c>] ? __lock_acquire+0x37c/0x9b0
 [<c013b8eb>] ? trace_hardirqs_off+0xb/0x10
 [<c011e14b>] printk+0x1b/0x20
 [<c024e5ac>] sk_free+0x3c/0x130
 [<c02500cd>] sock_wfree+0x2d/0x40
 [<c02524ba>] skb_release_all+0x3a/0x90
 [<c0251c5b>] __kfree_skb+0xb/0x90
 [<c0251cf9>] kfree_skb+0x19/0x30
 [<c89e1f74>] ei_start_xmit+0x164/0x330 [8390]
 [<c0257de0>] dev_hard_start_xmit+0x210/0x280
 [<c02bff38>] ? _spin_lock+0x58/0x60
 [<c0267fed>] __qdisc_run+0x16d/0x1e0
 [<c025a708>] dev_queue_xmit+0x1c8/0x4d0
 [<c025a57b>] ? dev_queue_xmit+0x3b/0x4d0
 [<c0121e0b>] ? local_bh_enable_ip+0x6b/0xb0
 [<c0260559>] neigh_resolve_output+0xe9/0x290
 [<c0121e0b>] ? local_bh_enable_ip+0x6b/0xb0
 [<c025e8ac>] neigh_update+0x23c/0x420
 [<c0121e0b>] ? local_bh_enable_ip+0x6b/0xb0
 [<c02676c0>] ? eth_header_cache_update+0x0/0x20
 [<c0294f6f>] arp_process+0x2ff/0x670
 [<c0294c70>] ? arp_process+0x0/0x670
 [<c026cd56>] ? nf_hook_slow+0xe6/0x100
 [<c0294c70>] ? arp_process+0x0/0x670
 [<c02953a9>] arp_rcv+0xc9/0x120
 [<c0294c70>] ? arp_process+0x0/0x670
 [<c02952e0>] ? arp_rcv+0x0/0x120
 [<c0257742>] netif_receive_skb+0x232/0x2e0
 [<c02575ea>] ? netif_receive_skb+0xda/0x2e0
 [<c025a163>] process_backlog+0x63/0xc0
 [<c02599ee>] net_rx_action+0x13e/0x1d0
 [<c0259910>] ? net_rx_action+0x60/0x1d0
 [<c0121ce5>] __do_softirq+0x55/0xc0
 [<c0121d96>] do_softirq+0x46/0x50
 [<c0122107>] irq_exit+0x57/0x70
 [<c010639f>] do_IRQ+0x4f/0xa0
 [<c01e5d14>] ? trace_hardirqs_off_thunk+0xc/0x18
 [<c01045e4>] common_interrupt+0x28/0x30
 [<c013007b>] ? sys_timer_delete+0x10b/0x110
 [<c01091b8>] ? default_idle+0x38/0x50
 [<c010269d>] cpu_idle+0x3d/0x80
 [<c02b8858>] rest_init+0x48/0x50
 =======================
AX25_DBG: c5dfa078, 00000000, 2, 1, 6
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad038, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c62d6cc8, 00000000, 1, 0, 0
AX25_DBG: c5f1e998, 00000000, 1, 1, 0
AX25_DBG: c58ad668, 00000000, 2, 2, 17
AX25_DBG: c58ad668, 00000000, 2, 2, 17
Bernard Pidoux F6BVP - Oct. 5, 2008, 6:31 p.m.
Here are a few interesting data captured via netconsole from
kernel-2.6.27-rc7 without af_netrom patch #4.

AX25_DBG: c4002338, 00000000, 1, 1, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002008, 00000000, 1, 2, 0
AX25_DBG: c4002008, 00000000, 1, 2, 0
AX25_DBG: c4002998, 00000000, 1, 0, 0
AX25_DBG: c4002008, 00000000, 1, 1, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002668, 00000000, 1, 2, 0
AX25_DBG: c4002668, 00000000, 1, 2, 0
AX25_DBG: c4002338, 00000000, 1, 2, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c6410058, 00000000, 10, 2, 17
AX25_DBG: c67ecd28, 00000000, 3, 2, 240
AX25_DBG: c67ef160, c5189aa8, 6, 5, 0
AX25_DBG: c4002668, 00000000, 1, 2, 0
AX25_DBG: c4002668, 00000000, 1, 2, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002008, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4002338, 00000000, 1, 2, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c4002338, 00000000, 1, 2, 0
AX25_DBG: c4002338, 00000000, 1, 2, 0
AX25_DBG: c6410058, 00000000, 10, 2, 17
AX25_DBG: c65b6738, 00000000, 3, 2, 240
AX25_DBG: c67eed48, c5186008, 6, 5, 0
AX25_DBG: c4002338, 00000000, 1, 2, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c6410058, 00000000, 10, 2, 17
AX25_DBG: c67ef160, 00000000, 3, 2, 240
AX25_DBG: c67ed970, c5189aa8, 6, 5, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c67ed970, c5189aa8, 6, 5, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c67ef160, c5189aa8, 6, 5, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c67eed48, c5189aa8, 6, 5, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c4002668, 00000000, 1, 2, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c6410058, 00000000, 10, 2, 17
AX25_DBG: c67eed48, 00000000, 3, 2, 240
AX25_DBG: c67ecd28, c5189800, 6, 5, 0
AX25_DBG: c4002668, 00000000, 1, 2, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c6410058, 00000000, 10, 2, 17
AX25_DBG: c67ed970, 00000000, 3, 2, 240
AX25_DBG: c65b6738, c5186558, 6, 5, 0
AX25_DBG: c4002668, 00000000, 1, 2, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c6410058, 00000000, 10, 2, 17
AX25_DBG: c67ecd28, 00000000, 3, 2, 240
AX25_DBG: c67eed48, c5189800, 6, 5, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c4065100, 00000000, 11, 5, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c40ba558, c51a7d50, 6, 5, 0
AX25_DBG: c40ba140, c51a7d50, 6, 5, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c40bb1a0, 00000000, 3, 2, 207
AX25_DBG: c40fa990, c51a7558, 6, 5, 0
AX25_DBG: c40260f0, 00000000, 11, 5, 0
AX25_DBG: c40fc598, c51d9aa8, 6, 5, 0
AX25_DBG: c40ba140, 00000000, 17, 10, 0
AX25_DBG: c40cc1d0, 00000000, 11, 5, 0
AX25_DBG: c40fb9f0, 00000000, 3, 5, 240
AX25_DBG: c40fb1c0, 00000000, 3, 5, 240
AX25_DBG: c40fa578, 00000000, 3, 5, 240
AX25_DBG: c40fda10, 00000000, 3, 5, 240
AX25_DBG: c6bac058, 00000000, 2, 1, 6
AX25_DBG: c40fd1e0, c51d9d50, 6, 5, 0
AX25_DBG: c40aa110, 00000000, 11, 5, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c40aa928, 00000000, 11, 5, 0
AX25_DBG: c40fd5f8, c519f558, 6, 5, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c40bb5b8, c51a7558, 6, 5, 0
AX25_DBG: c40bb1a0, 00000000, 3, 2, 207
AX25_DBG: c40ba558, 00000000, 3, 5, 240
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c40d0210, 00000000, 11, 5, 0
AX25_DBG: c657d038, 00000000, 2, 2, 17
AX25_DBG: c40f2058, 00000000, 2, 2, 17
AX25_DBG: c40e5cc8, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c40e5cc8, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c40f2058, 00000000, 2, 2, 17
AX25_DBG: c40bb1a0, 00000000, 3, 2, 207
AX25_DBG: c40f2058, 00000000, 2, 2, 17
AX25_DBG: c40fcdc8, 00000000, 16, 3, 9
AX25_DBG: c4079cc8, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c4079cc8, 00000000, 1, 0, 0
AX25_DBG: c4002668, 00000000, 1, 1, 0
AX25_DBG: c40fcdc8, 00000000, 16, 3, 9
AX25_DBG: c40fcdc8, 00000000, 16, 3, 9
AX25_DBG: c4002668, 00000000, 1, 2, 0
AX25_DBG: c40fcdc8, 00000000, 16, 3, 9
AX25_DBG: c40fcdc8, 00000000, 16, 3, 9
AX25_DBG: c4002668, 00000000, 1, 2, 0

Bernard


Le samedi 04 octobre 2008 à 22:09 +0200, Jarek Poplawski a écrit :
> On Sat, Oct 04, 2008 at 09:11:14PM +0200, Jarek Poplawski wrote:
> ...
> > BTW, I think there is an additional, not serious problem with freeing
> > unorphaned sockets by netrom (as seen in your debugging logs with non
> > zero in the 2-nd, and 6 in the 3-rd column). So, it would be nice to
> > check if my #4 patch could help for this. (You need then 2.6.27-rc
> > with patches #1(debugging), #3, #4 as signed in my previous message,
> > and of course above mentioned one reverted).
> 
> BTW, could you please test it with and without the #4 (af_netrom) patch?
> 
> Jarek P.
> 

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Jarek Poplawski - Oct. 5, 2008, 8:40 p.m.
On Sun, Oct 05, 2008 at 08:31:09PM +0200, Bernard, f6bvp wrote:
> Here are a few interesting data captured via netconsole from
> kernel-2.6.27-rc7 without af_netrom patch #4.
> 
...
> AX25_DBG: c67ef160, c5189aa8, 6, 5, 0
...
> AX25_DBG: c67eed48, c5186008, 6, 5, 0

So, it looks like this patch could make some change, but I'd like to be
sure again: with or without David's patch?

Thanks,
Jarek P.
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Jarek Poplawski - Oct. 5, 2008, 9:09 p.m.
On Sun, Oct 05, 2008 at 10:33:45PM +0200, Jarek Poplawski wrote:
> On Sun, Oct 05, 2008 at 05:40:12PM +0200, Bernard, f6bvp wrote:
> > With kernel-2.6.27-rc7 and ypur patches including netrom one I observed
> > three events via netconsole.
> > I think that they were triggered by NetRom activity I exercized on
> > purpose.
> > See attached documents.
> 
> Bernard, do you mean exactly "With kernel-2.6.27-rc7 and ypur patches
> including netrom" or this all and David's patch reverted?

More precisely: I'd like to finish the main problem (oops) in this
thread before trying possibly new things in NetRom etc., so it would
be nice if you could acknowledge to David that reverting his patch
fixes this for sure. Additionally it would be nice to check this
Tihomir Heidelberg's fix as an alternative.

Jarek P.
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Bernard Pidoux F6BVP - Oct. 5, 2008, 9:18 p.m.
Jarek,

Yes, previous reports were without reverting David's patch.
Now I have removed David's patch (ax25_std_timer.c) and reverted 9A4GL
patch (af_ax25.c).
Thus present kernel is the original plus 9A4GL patch plus your AX25_DBG
and netrom patches and minus David's patch.
The system has been stable for two hours and there is nothing special
in /var/log/messages as can be seen the sample below.   

Oct  5 22:56:15 f6bvp-9 kernel: AX25_DBG: c6530350, 00000000, 2, 2, 17
Oct  5 22:56:15 f6bvp-9 last message repeated 7 times
Oct  5 22:56:15 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 16, 3, 0
Oct  5 22:56:15 f6bvp-9 kernel: AX25_DBG: c6530350, 00000000, 2, 2, 17
Oct  5 22:56:15 f6bvp-9 last message repeated 7 times
Oct  5 22:56:26 f6bvp-9 kernel: AX25_DBG: c3846a08, 00000000, 11, 5, 0
Oct  5 22:57:07 f6bvp-9 kernel: AX25_DBG: c6530350, 00000000, 2, 2, 17
Oct  5 22:57:07 f6bvp-9 kernel: AX25_DBG: c3936cb8, 00000000, 2, 2, 17
Oct  5 22:57:26 f6bvp-9 kernel: AX25_DBG: c3846a08, 00000000, 11, 5, 0
Oct  5 22:58:14 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 3, 2, 207
Oct  5 22:58:44 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 3, 2, 207
Oct  5 22:58:56 f6bvp-9 kernel: AX25_DBG: c3931998, 00000000, 1, 0, 0
Oct  5 22:58:56 f6bvp-9 kernel: AX25_DBG: c3931cc8, 00000000, 1, 1, 0
Oct  5 22:58:56 f6bvp-9 kernel: AX25_DBG: c3931998, 00000000, 1, 0, 0
Oct  5 22:58:56 f6bvp-9 kernel: AX25_DBG: c3931cc8, 00000000, 1, 1, 0
Oct  5 22:58:56 f6bvp-9 kernel: AX25_DBG: c3931998, 00000000, 1, 0, 0
Oct  5 22:58:56 f6bvp-9 kernel: AX25_DBG: c3931cc8, 00000000, 1, 1, 0
Oct  5 22:58:56 f6bvp-9 kernel: AX25_DBG: c3931998, 00000000, 1, 0, 0
Oct  5 22:58:56 f6bvp-9 kernel: AX25_DBG: c3931cc8, 00000000, 1, 1, 0
Oct  5 22:58:58 f6bvp-9 kernel: AX25_DBG: c3931998, 00000000, 1, 0, 0
Oct  5 22:58:58 f6bvp-9 kernel: AX25_DBG: c3931cc8, 00000000, 1, 1, 0
Oct  5 22:58:58 f6bvp-9 kernel: AX25_DBG: c3931998, 00000000, 1, 0, 0
Oct  5 22:58:58 f6bvp-9 kernel: AX25_DBG: c3931cc8, 00000000, 1, 1, 0
Oct  5 22:59:14 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 3, 2, 207
Oct  5 22:59:26 f6bvp-9 kernel: AX25_DBG: c3846a08, 00000000, 11, 5, 0
Oct  5 22:59:44 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 3, 2, 207
Oct  5 22:59:44 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 6, 5, 0
Oct  5 23:00:04 f6bvp-9 kernel: AX25_DBG: c38e1248, 00000000, 2, 1, 6
Oct  5 23:00:12 f6bvp-9 kernel: AX25_DBG: c6530350, 00000000, 2, 2, 17
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0c58, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0668, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0c58, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0668, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0668, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 mountd[3369]: authenticated mount request from
f6bvp-11:980 for /temp (/temp)
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0c58, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0078, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0c58, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0668, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0c58, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 mountd[3369]: authenticated unmount request from
f6bvp-11:983 for /temp (/temp)
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0668, 00000000, 2, 1, 6
Oct  5 23:00:23 f6bvp-9 kernel: AX25_DBG: c38e0078, 00000000, 2, 1, 6
Oct  5 23:01:01 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 16, 3, 9
Oct  5 23:01:01 f6bvp-9 kernel: AX25_DBG: c3805998, 00000000, 1, 0, 0
Oct  5 23:01:01 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:01 f6bvp-9 kernel: AX25_DBG: c3805998, 00000000, 1, 0, 0
Oct  5 23:01:01 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:01 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 16, 3, 9
Oct  5 23:01:02 f6bvp-9 crond[4112]: (root) CMD (nice -n 19 run-parts
--report /etc/cron.hourly)
Oct  5 23:01:02 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 16, 3, 9
Oct  5 23:01:02 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 2, 0
Oct  5 23:01:02 f6bvp-9 kernel: AX25_DBG: c38e1248, 00000000, 2, 1, 6
Oct  5 23:01:02 f6bvp-9 kernel: AX25_DBG: c66e2ce8, 00000000, 10, 1, 6
Oct  5 23:01:02 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:02 f6bvp-9 kernel: AX25_DBG: c6530350, 00000000, 2, 2, 17
Oct  5 23:01:02 f6bvp-9 last message repeated 2 times
Oct  5 23:01:02 f6bvp-9 kernel: AX25_DBG: c38e1248, 00000000, 2, 1, 6
Oct  5 23:01:02 f6bvp-9 kernel: AX25_DBG: c66e2ce8, 00000000, 10, 1, 6
Oct  5 23:01:02 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:02 f6bvp-9 kernel: AX25_DBG: c6530350, 00000000, 2, 2, 17
Oct  5 23:01:03 f6bvp-9 last message repeated 2 times
Oct  5 23:01:03 f6bvp-9 kernel: AX25_DBG: c3805998, 00000000, 1, 0, 0
Oct  5 23:01:03 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:03 f6bvp-9 kernel: AX25_DBG: c3805998, 00000000, 1, 0, 0
Oct  5 23:01:03 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:04 f6bvp-9 kernel: AX25_DBG: c3805998, 00000000, 1, 0, 0
Oct  5 23:01:04 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:04 f6bvp-9 kernel: AX25_DBG: c3805998, 00000000, 1, 0, 0
Oct  5 23:01:04 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:05 f6bvp-9 kernel: AX25_DBG: c3805998, 00000000, 1, 0, 0
Oct  5 23:01:05 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:05 f6bvp-9 kernel: AX25_DBG: c3805998, 00000000, 1, 0, 0
Oct  5 23:01:05 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:05 f6bvp-9 kernel: AX25_DBG: c3805998, 00000000, 1, 0, 0
Oct  5 23:01:05 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:05 f6bvp-9 kernel: AX25_DBG: c3805998, 00000000, 1, 0, 0
Oct  5 23:01:05 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 1, 0
Oct  5 23:01:06 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 16, 3, 9
Oct  5 23:01:06 f6bvp-9 kernel: AX25_DBG: c38d1a30, 00000000, 16, 3, 9
Oct  5 23:01:06 f6bvp-9 kernel: AX25_DBG: c3805cc8, 00000000, 1, 2, 0

Bernard


Le dimanche 05 octobre 2008 à 22:40 +0200, Jarek Poplawski a écrit :
> On Sun, Oct 05, 2008 at 08:31:09PM +0200, Bernard, f6bvp wrote:
> > Here are a few interesting data captured via netconsole from
> > kernel-2.6.27-rc7 without af_netrom patch #4.
> > 
> ...
> > AX25_DBG: c67ef160, c5189aa8, 6, 5, 0
> ...
> > AX25_DBG: c67eed48, c5186008, 6, 5, 0
> 
> So, it looks like this patch could make some change, but I'd like to be
> sure again: with or without David's patch?
> 
> Thanks,
> Jarek P.
> 

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Jarek Poplawski - Oct. 5, 2008, 10:05 p.m.
David, please read below:
------------------------>

On Sun, Oct 05, 2008 at 11:18:20PM +0200, Bernard, f6bvp wrote:
> Jarek,
> 
> Yes, previous reports were without reverting David's patch.
> Now I have removed David's patch (ax25_std_timer.c) and reverted 9A4GL
> patch (af_ax25.c).
> Thus present kernel is the original plus 9A4GL patch plus your AX25_DBG
> and netrom patches and minus David's patch.
> The system has been stable for two hours and there is nothing special
> in /var/log/messages as can be seen the sample below.   

Great! So, I think we could agree with this:

1. Reverting this patch fixes the oops which started this thread:

	commit 30902dc3cb0ea1cfc7ac2b17bcf478ff98420d74
	Author: David S. Miller <davem@davemloft.net>
	Date:   Tue Jun 17 21:26:37 2008 -0700

	ax25: Fix std timer socket destroy handling.

2. Alternative (original) fix proposed by Tihomir Hidelberg:
	http://marc.info/?l=linux-netdev&m=121370472223572&w=2 
   doesn't seem to cause any problems.

David, please reconsider these changes as reported and tested
by Bernard.


Bernard, 
It looks like my netrom patch removes these unorphaned sockets from
this debugging log, so I'll resend this signed off soon.

Since now, please, treat these 1. & 2. above plus lib8390 & netrom
patches as a base for next tests, and if there are again any new
bugs from new tests, start new threads for them.

Thanks,
Jarek P.
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David Miller - Oct. 6, 2008, 8:05 p.m.
From: Jarek Poplawski <jarkao2@gmail.com>
Date: Mon, 6 Oct 2008 00:05:10 +0200

> So, I think we could agree with this:
> 
> 1. Reverting this patch fixes the oops which started this thread:
> 
> 	commit 30902dc3cb0ea1cfc7ac2b17bcf478ff98420d74
> 	Author: David S. Miller <davem@davemloft.net>
> 	Date:   Tue Jun 17 21:26:37 2008 -0700
> 
> 	ax25: Fix std timer socket destroy handling.
> 
> 2. Alternative (original) fix proposed by Tihomir Hidelberg:
> 	http://marc.info/?l=linux-netdev&m=121370472223572&w=2 
>    doesn't seem to cause any problems.
> 
> David, please reconsider these changes as reported and tested
> by Bernard.

Ok, I'll do this in the net-2.6 tree.

Thanks for the analysis and report everyone.
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Patch

diff --git a/net/ax25/ax25_std_timer.c b/net/ax25/ax25_std_timer.c
index 96e4b92..cdc7e75 100644
--- a/net/ax25/ax25_std_timer.c
+++ b/net/ax25/ax25_std_timer.c
@@ -39,11 +39,9 @@  void ax25_std_heartbeat_expiry(ax25_cb *ax25)
 
 	switch (ax25->state) {
 	case AX25_STATE_0:
-		/* Magic here: If we listen() and a new link dies before it
-		   is accepted() it isn't 'dead' so doesn't get removed. */
-		if (!sk || sock_flag(sk, SOCK_DESTROY) ||
-		    (sk->sk_state == TCP_LISTEN &&
-		     sock_flag(sk, SOCK_DEAD))) {
+		if (!sk ||
+		    sock_flag(sk, SOCK_DESTROY) ||
+		    sock_flag(sk, SOCK_DEAD)) {
 			if (sk) {
 				sock_hold(sk);
 				ax25_destroy_socket(ax25);