netdev - Re: Kernel 4.1.12 crash

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Message-ID: <20151126164452.GA2988@alphalink.fr>
Date:	Thu, 26 Nov 2015 17:44:52 +0100
From:	Guillaume Nault <g.nault@...halink.fr>
To:	Andrew <nitr0@...i.kr.ua>
Cc:	Alexander Duyck <alexander.duyck@...il.com>, netdev@...r.kernel.org
Subject: Re: Kernel 4.1.12 crash

On Wed, Nov 25, 2015 at 04:58:54PM +0200, Andrew wrote:
> 25.11.2015 16:10, Guillaume Nault пишет:
> >On Wed, Nov 25, 2015 at 12:59:52AM +0200, Andrew wrote:
> >>Hi.
> >>
> >>I tried to reproduce errors in virtual environment (some VMs on my
> >>notebook).
> >>
> >>I've tried to create 1000 client PPPoE sessions from this box via script:
> >>for i in `seq 1 1000`; do pppd plugin rp-pppoe.so user test password test
> >>nodefaultroute maxfail 0 persist nodefaultroute holdoff 1 noauth eth0; done
> >>
> >I've tried to reproduce the bug with your script, but couldn't get
> >anything to crash (VM is Debian Jessie i386 running on KVM with upstream
> >kernel 4.1.12). Does the crash happen before all sessions get
> >established?
> Yes, crash happens even before all daemon instances are started. Sessions
> don't get established because BRAS configured to reject sessions (so a lot
> of concurrent connection retries happens) - I still didn't created account
> for test user on it.
> 
Ok, I got the crash too. In fact I had misunderstood your previous
message, crash happens when PPP sessions don't get established
(authentication failures in my case).

I'll investigate on that and let you know.
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