On 4/17/18 5:29 PM, Ben Greear wrote:
>
> FYI, problem still happens in 4.16. I'm going to re-enable my hack below
> for this kernel as well...I had hopes it might be fixed...
Interesting. I was hoping the same.
>
> BUG: unable to handle kernel NULL pointer dereference at 8
> IP: fib6_walk_con
On 01/24/2018 03:59 PM, Ben Greear wrote:
On 06/20/2017 08:03 PM, David Ahern wrote:
On 6/20/17 5:41 PM, Ben Greear wrote:
On 06/20/2017 11:05 AM, Michal Kubecek wrote:
On Tue, Jun 20, 2017 at 07:12:27AM -0700, Ben Greear wrote:
On 06/14/2017 03:25 PM, David Ahern wrote:
On 6/14/17 4:23 PM,
On 06/20/2017 08:03 PM, David Ahern wrote:
On 6/20/17 5:41 PM, Ben Greear wrote:
On 06/20/2017 11:05 AM, Michal Kubecek wrote:
On Tue, Jun 20, 2017 at 07:12:27AM -0700, Ben Greear wrote:
On 06/14/2017 03:25 PM, David Ahern wrote:
On 6/14/17 4:23 PM, Ben Greear wrote:
On 06/13/2017 07:27 PM,
On 6/20/17 9:03 PM, David Ahern wrote:
> On 6/20/17 5:41 PM, Ben Greear wrote:
>> On 06/20/2017 11:05 AM, Michal Kubecek wrote:
>>> On Tue, Jun 20, 2017 at 07:12:27AM -0700, Ben Greear wrote:
On 06/14/2017 03:25 PM, David Ahern wrote:
> On 6/14/17 4:23 PM, Ben Greear wrote:
>> On 06/13
On 6/20/17 5:41 PM, Ben Greear wrote:
> On 06/20/2017 11:05 AM, Michal Kubecek wrote:
>> On Tue, Jun 20, 2017 at 07:12:27AM -0700, Ben Greear wrote:
>>> On 06/14/2017 03:25 PM, David Ahern wrote:
On 6/14/17 4:23 PM, Ben Greear wrote:
> On 06/13/2017 07:27 PM, David Ahern wrote:
>
>
On 06/20/2017 11:05 AM, Michal Kubecek wrote:
On Tue, Jun 20, 2017 at 07:12:27AM -0700, Ben Greear wrote:
On 06/14/2017 03:25 PM, David Ahern wrote:
On 6/14/17 4:23 PM, Ben Greear wrote:
On 06/13/2017 07:27 PM, David Ahern wrote:
Let's try a targeted debug patch. See attached
I had to chan
On Tue, Jun 20, 2017 at 07:12:27AM -0700, Ben Greear wrote:
> On 06/14/2017 03:25 PM, David Ahern wrote:
> >On 6/14/17 4:23 PM, Ben Greear wrote:
> >>On 06/13/2017 07:27 PM, David Ahern wrote:
> >>
> >>>Let's try a targeted debug patch. See attached
> >>
> >>I had to change it to pr_err so it would
On 06/14/2017 03:25 PM, David Ahern wrote:
On 6/14/17 4:23 PM, Ben Greear wrote:
On 06/13/2017 07:27 PM, David Ahern wrote:
Let's try a targeted debug patch. See attached
I had to change it to pr_err so it would go to our serial console
since the system locked hard on crash,
and that appea
On 6/14/17 4:23 PM, Ben Greear wrote:
> On 06/13/2017 07:27 PM, David Ahern wrote:
>
>> Let's try a targeted debug patch. See attached
>
> I had to change it to pr_err so it would go to our serial console
> since the system locked hard on crash,
> and that appears to be enough to change the timin
On 06/13/2017 07:27 PM, David Ahern wrote:
Let's try a targeted debug patch. See attached
I had to change it to pr_err so it would go to our serial console
since the system locked hard on crash,
and that appears to be enough to change the timing where we can no longer
reproduce the problem.
T
On 6/13/17 3:42 PM, Cong Wang wrote:
> On Tue, Jun 13, 2017 at 1:16 PM, Ben Greear wrote:
>> On 06/09/2017 02:25 PM, Eric Dumazet wrote:
>>>
>>> On Fri, 2017-06-09 at 07:27 -0600, David Ahern wrote:
On 6/8/17 11:55 PM, Cong Wang wrote:
> Apparently fn->parent is NULL here for some re
On Tue, Jun 13, 2017 at 1:16 PM, Ben Greear wrote:
> On 06/09/2017 02:25 PM, Eric Dumazet wrote:
>>
>> On Fri, 2017-06-09 at 07:27 -0600, David Ahern wrote:
>>>
>>> On 6/8/17 11:55 PM, Cong Wang wrote:
Apparently fn->parent is NULL here for some reason, but
I don't know if that is expect
On 06/13/2017 01:28 PM, David Ahern wrote:
On 6/13/17 2:16 PM, Ben Greear wrote:
On 06/09/2017 02:25 PM, Eric Dumazet wrote:
On Fri, 2017-06-09 at 07:27 -0600, David Ahern wrote:
On 6/8/17 11:55 PM, Cong Wang wrote:
On Thu, Jun 8, 2017 at 2:27 PM, Ben Greear
wrote:
As far as I can tell, th
On 6/13/17 2:16 PM, Ben Greear wrote:
> On 06/09/2017 02:25 PM, Eric Dumazet wrote:
>> On Fri, 2017-06-09 at 07:27 -0600, David Ahern wrote:
>>> On 6/8/17 11:55 PM, Cong Wang wrote:
On Thu, Jun 8, 2017 at 2:27 PM, Ben Greear
wrote:
>
> As far as I can tell, the patch did not help
On 06/09/2017 02:25 PM, Eric Dumazet wrote:
On Fri, 2017-06-09 at 07:27 -0600, David Ahern wrote:
On 6/8/17 11:55 PM, Cong Wang wrote:
On Thu, Jun 8, 2017 at 2:27 PM, Ben Greear wrote:
As far as I can tell, the patch did not help, or at least we still reproduce
the
crash easily.
netlink du
On Fri, 2017-06-09 at 07:27 -0600, David Ahern wrote:
> On 6/8/17 11:55 PM, Cong Wang wrote:
> > On Thu, Jun 8, 2017 at 2:27 PM, Ben Greear wrote:
> >>
> >> As far as I can tell, the patch did not help, or at least we still
> >> reproduce
> >> the
> >> crash easily.
> >
> > netlink dump is seria
On 6/8/17 11:55 PM, Cong Wang wrote:
> On Thu, Jun 8, 2017 at 2:27 PM, Ben Greear wrote:
>>
>> As far as I can tell, the patch did not help, or at least we still reproduce
>> the
>> crash easily.
>
> netlink dump is serialized by nlk->cb_mutex so I don't think that
> patch makes any sense w.r.t r
On Thu, Jun 8, 2017 at 2:27 PM, Ben Greear wrote:
>
> As far as I can tell, the patch did not help, or at least we still reproduce
> the
> crash easily.
netlink dump is serialized by nlk->cb_mutex so I don't think that
patch makes any sense w.r.t race condition.
> (gdb) l *(fib6_walk_continue+0
On 06/06/2017 09:19 PM, Eric Dumazet wrote:
On Tue, 2017-06-06 at 18:34 -0600, David Ahern wrote:
On 6/6/17 6:27 PM, Eric Dumazet wrote:
Good catch, but it looks like similar fix is needed a few lines before.
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index
deea901746c8570c5e801e405
On Tue, 2017-06-06 at 18:34 -0600, David Ahern wrote:
> On 6/6/17 6:27 PM, Eric Dumazet wrote:
> > Good catch, but it looks like similar fix is needed a few lines before.
> >
> > diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
> > index
> > deea901746c8570c5e801e40592c91e3b62812e0..b214443dc
On 06/06/2017 05:27 PM, Eric Dumazet wrote:
On Tue, 2017-06-06 at 18:00 -0600, David Ahern wrote:
On 6/6/17 3:06 PM, Ben Greear wrote:
This bug has been around forever, and we recently got an intern and
stuck him with
trying to reproduce it on the latest kernel. It is still here. I'm not
supe
On 6/6/17 6:27 PM, Eric Dumazet wrote:
> Good catch, but it looks like similar fix is needed a few lines before.
>
> diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
> index
> deea901746c8570c5e801e40592c91e3b62812e0..b214443dc8346cef3690df7f27cc48a864028865
> 100644
> --- a/net/ipv6/ip6_fib
On Tue, 2017-06-06 at 18:00 -0600, David Ahern wrote:
> On 6/6/17 3:06 PM, Ben Greear wrote:
> > This bug has been around forever, and we recently got an intern and
> > stuck him with
> > trying to reproduce it on the latest kernel. It is still here. I'm not
> > super excited
> > about trying to
On 6/6/17 3:06 PM, Ben Greear wrote:
> This bug has been around forever, and we recently got an intern and
> stuck him with
> trying to reproduce it on the latest kernel. It is still here. I'm not
> super excited
> about trying to fix this, but we can easily test patches if someone has a
> patch
Hello,
This bug has been around forever, and we recently got an intern and stuck him
with
trying to reproduce it on the latest kernel. It is still here. I'm not super
excited
about trying to fix this, but we can easily test patches if someone has a
patch to try.
Test case is to create 1000 m
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