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From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: Nico Schottelius <nico.schottelius@ungleich.ch>
Cc: WireGuard mailing list <wireguard@lists.zx2c4.com>
Subject: Re: Kernel panic on 5.3.1-arch1-1-ARCH
Date: Sat, 5 Oct 2019 22:57:24 +0200	[thread overview]
Message-ID: <CAHmME9rHYf71vrPxVec5AVaUOgB=+1YHE+j8rg=ebDbZO0qA2g@mail.gmail.com> (raw)
In-Reply-To: <87v9t2c45b.fsf@ungleich.ch>

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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  reply	other threads:[~2019-10-05 20:58 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-05 20:45 Kernel panic on 5.3.1-arch1-1-ARCH Nico Schottelius
2019-10-05 20:57 ` Jason A. Donenfeld [this message]
2019-10-05 21:20   ` Nico Schottelius
2019-10-05 22:02     ` Nico Schottelius

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