cros-garcon NULL-derefs on cold-boot netlink enumeration when
tailscale0 is present, preventing the Crostini container and
ChromeOS Terminal from starting cleanly. This is an upstream
ChromiumOS bug in cros-garcon; tailscaled can work around it
by defaulting to userspace-networking mode on Crostini.
Tailscale SSH continues to work via tailscaled's netstack.
Users can override with --tun=tailscale0 on ChromeOS builds
where cros-garcon is fixed.
Crostini is detected via /opt/google/cros-containers/bin/garcon,
which is present in every Crostini penguin container.
ssh/tailssh extends the existing Debian default-PATH case to
cover Crostini, since Crostini is Debian-based and benefits
from the same SSH PATH defaults.
RELNOTE: Crostini now defaults to userspace-networking.
Fixes#19488
Updates #12090
Signed-off-by: ferrumclaudepilgrim <ferrumclaudepilgrim@users.noreply.github.com>
3f70abdc6f