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From: Nico Schottelius <nico.schottelius@ungleich.ch>
To: WireGuard mailing list <wireguard@lists.zx2c4.com>
Subject: Re: Kernel panic on 5.3.1-arch1-1-ARCH
Date: Sat, 05 Oct 2019 23:20:19 +0200
Message-ID: <87r23qc2jw.fsf@ungleich.ch> (raw)
In-Reply-To: <CAHmME9rHYf71vrPxVec5AVaUOgB=+1YHE+j8rg=ebDbZO0qA2g@mail.gmail.com>


Hey Jason,

thanks for the quick reply - I' ll upgrade as soon as a new package is
released and give a status update afterwards. Thanks for tracking it
down!

Best,

Nico

Jason A. Donenfeld <Jason@zx2c4.com> writes:

> This isn't WireGuard, actually. It's a line in wg-quick's bash that
> says `ip rule add ... suppress_prefix ...`.
>
> You can reproduce the kernel crash without WireGuard anywhere in the
> equation with this sequence:
>
> ip netns add crash
> ip -n crash link add dummy1 type dummy
> ip -n crash link set dummy1 up
> ip -n crash -6 route add default dev dummy1
> ip -n crash -6 rule add table main suppress_prefixlength 0
> ip netns exec crash ping -f -c 1000 -W 1 1234::1 || true
> ip -n crash -6 rule del table main suppress_prefixlength 0
> ip -n crash link del dummy1
> ip netns del crash
>
> I submitted a patch for this upstream here:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git/commit/?id=ca7a03c4175366a92cee0ccc4fec0038c3266e26
>
> It's been backported to stable already. Update your kernel to 5.3.4
> and things should work again for you.
>
> Jason


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Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-05 20:45 Nico Schottelius
2019-10-05 20:57 ` Jason A. Donenfeld
2019-10-05 21:20   ` Nico Schottelius [this message]
2019-10-05 22:02     ` Nico Schottelius

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