breakage in policy routing on 5.3 and 5.3.1

Michael Williams michael.williams at
Tue Sep 24 13:50:28 CEST 2019

Thank you Jason! This makes more sense as the issue did not appear
until the system reboot which would be consistent with the kernel not
WireGuard upgrade. Much appreciate your response.

Sent from my iPhone

> On Sep 24, 2019, at 04:47, Jason A. Donenfeld <Jason at> wrote:
> Hi folks,
> FYI, upstream Linux broke aspects policy routing in 5.3. This isn't
> specific to WireGuard, but rather the policy routing engine in
> general, but users of the wg-quick(8) bash script for configuring
> networks might run into this if they're routing a default route and
> have IPv6, because the bash script makes use of policy routing.
> I sent two patches upstream to fix bugs introduced with 5.3:
> The latter one appears to mitigate the problem, as confirmed by Arch
> Linux users:
> I'll update this thread when we know more from the netdev mailing list.
> Thanks,
> Jason
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