util/linuxfw: add missing error checks in tests

Browse Source

This would surface as panics when run on Fly. Still fail, but at least don't panic.

Updates #10003

Signed-off-by: Maisem Ali <maisem@tailscale.com>

...

This commit is contained in:

500 Internal Server Error

Gitea Version: 1.28.0+dev-477-g8b6ad49a5f