netdev - Re: [PATCH net] ppp: don't override sk->sk_state in pppoe_flush

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Date:	Thu, 22 Oct 2015 16:49:55 +0200
From:	Guillaume Nault <g.nault@...halink.fr>
To:	Denys Fedoryshchenko <nuclearcat@...learcat.com>
Cc:	Matt Bennett <Matt.Bennett@...iedtelesis.co.nz>, core@....lg.ua,
	netdev@...r.kernel.org, davem@...emloft.net, paulus@...ba.org
Subject: Re: [PATCH net] ppp: don't override sk->sk_state in pppoe_flush_dev()

On Thu, Oct 22, 2015 at 03:53:33AM +0300, Denys Fedoryshchenko wrote:
> On 2015-10-22 03:14, Matt Bennett wrote:
> >On Tue, 2015-10-13 at 05:13 +0300, Denys Fedoryshchenko wrote:
> >>On 2015-10-07 15:12, Guillaume Nault wrote:
> >>> diff --git a/drivers/net/ppp/pppoe.c b/drivers/net/ppp/pppoe.c
> >>> index 2ed7506..5e0b432 100644
> >>> --- a/drivers/net/ppp/pppoe.c
> >>> +++ b/drivers/net/ppp/pppoe.c
> >>> @@ -589,7 +589,7 @@ static int pppoe_release(struct socket *sock)
> >>>
> >>>  	po = pppox_sk(sk);
> >>>
> >>> -	if (sk->sk_state & (PPPOX_CONNECTED | PPPOX_BOUND | PPPOX_ZOMBIE)) {
> >>> +	if (po->pppoe_dev) {
> >>>  		dev_put(po->pppoe_dev);
> >>>  		po->pppoe_dev = NULL;
> >>>  	}
> >>I just got OK to upgrade server yesterday, for now around 12 hours
> >>working fine. I need 1-2 more days, and maybe will upgrade few more
> >>servers to say for sure, if it is ok or not.
> >>Sorry for delay, just it is production servers and at current situation
> >>they cannot tolerate significant downtime.
> >>
> >Any update on whether this issue is fixed with the suggested patch?
> 
> As on server i am allowed to test - no crashed anymore, but i am unable to
> get permission yet to test
> on server where this crash was happening several times per day. But all i
> can say it is definitely better now.
> 
Good. It seems that more people are getting this problem, so I'm going
to submit the patch now.

I'm still interested in the result of your test on the second server
though.
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