"/localapi/v0/prefs" Authentication issue after upgrade to 1.8 (Linux)

[Amine]

Hi everybody,

I’ve just updated my machine to tailscale 1.8 to try out taildrop.

When I do tailscale up I get:

$ tailscale up
HTTP 403 Forbidden: prefs write access denied
 (expected 200)

strace shows:

pid 12846] write(3, "PATCH /localapi/v0/prefs HTTP/1.1\r\nHost: local-tailscaled.sock\r\nUser-Agent: Go-http-client/1.1\r\nContent-Length: 395\r\nAccept-Encoding: gzip\r\n\r\n{\"ControlURL\":\"https://login.tailscale.com\",\"RouteAll\":false,\"AllowSingleHosts\":true,\"ExitNodeID\":\"\",\"ExitNodeIP\":\"\",\"ExitNodeAllowLANAccess\":false,\"CorpDNS\":true,\"WantRunning\":true,\"LoggedOut\":false,\"ShieldsUp\":false,\"AdvertiseTags\":null,\"Hostname\":\"\",\"OSVersion\":\"\",\"DeviceModel\":\"\",\"NotepadURLs\":false,\"AdvertiseRoutes\":[],\"NoSNAT\":false,\"NetfilterMode\":2,\"Config\":null,\"WantRunningSet\":true}", 537) = 537

[pid 12846] <... read resumed>"HTTP/1.1 403 Forbidden\r\nContent-Type: text/plain; charset=utf-8\r\nX-Content-Type-Options: nosniff\r\nDate: Tue, 11 May 2021 14:08:16 GMT\r\nContent-Length: 26\r\n\r\nprefs write access denied\n", 4096) = 183

The /localapi/v0/status just before this request seem to be successful.

I’m running NixOS 20.09 with tailscale from the unstable channel.

[within]

Try using sudo tailscale up, it’s odd that you don’t get the “try using sudo” prompt though. I’m gonna attempt to verify this.

[Amine]

I was just going to reply that I was missing a sudo

Thanks

[within]

No problem! I’m going to attempt to recreate your error and see if I can get that fixed.

[Amine]

Oh sorry I meant I was running it without sudo initially and thus the facepalm all good now