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FS#4102 - netifd intermittently fails to bring up wireguard interface #9087

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openwrt-bot opened this issue Oct 21, 2021 · 0 comments
Open

FS#4102 - netifd intermittently fails to bring up wireguard interface #9087

openwrt-bot opened this issue Oct 21, 2021 · 0 comments
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flyspray release/21.02

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@openwrt-bot openwrt-bot commented Oct 21, 2021

wiltedwalls:

I have a wireguard interface that is defined in UCI, which normally works well. Sometimes following a device reboot, wireguard will not be brought up at all. When I then try to bring up the interface manually using "ifup wg0", the wireguard.sh setup code is not even called. Rebooting the router beings back normal wireguard functionality.

I have seen this on 21.02 (ramips & ath79), 21.02-rc3 (ramips), and 19.07.3 (ar71xx).

It happens most frequently following an automatic 3am reboot. It is difficult to reproduce on demand in the middle of the day. I can cause it to happen in about 20% of 3am reboots by using a domain name for the wireguard peer which is a CNAME pointing to a CNAME pointing to a CNAME pointing to an A record.

@vgaetera thinks there might be a race condition in netifd, which is why I have tagged this report.

I have several routers in this state presently and can do any requested testing on them.

Other people are also seeing the same issue. One person reports seeing the issue also when using an ip address for the peer (no DNS). A link to the forum discussion is https://forum.openwrt.org/t/wireguard-interfaces-sometimes-do-not-come-up-automatically-in-21-02/106012

@aparcar aparcar added the release/21.02 label Feb 22, 2022
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