NetBSD 9.2 networking kernel panic

[lenticularis39]

As reported by @RaymiiOrg, NetBSD 9.2 kernel panicks when booting with the Tulip NIC and manual networking setup during the installation:

/dev/rsd0a: file system is clean; not checking
Setting sysctl variables:
ddb.onpanic: 1 -> 0
[   7.9697692] cd0: no disk label
swapctl: setting dump device to /dev/sd0b
swapctl: adding /dev/sd0b as swap device at priority 0
Starting file system checks:
rndctl: no entropy in seed
Setting tty flags.
Starting network.
Hostname: netbsd.spnw.nl
IPv6 mode: host
Configuring network interfaces: tlp0[  13.7300354] tlp0: receive process failed to idle: state RUNNING - WAIT
[  13.7666263] tlp0: receive process failed to idle: state RUNNING - WAIT
[  13.7854181] tlp0: receive process failed to idle: state RUNNING - WAIT
[  13.7962981] stray dec 6600 irq 20
[  13.7980337] stray dec 6600 irq 20
[  13.7987652] stray dec 6600 irq 20
[  13.7994967] stray dec 6600 irq 20
[  13.8002541] stray dec 6600 irq 20; stopped logging
[  13.8002541] panic: kernel diagnostic assertion "mutex_owned(&cpu_lock)" failed: file "/usr/src/sys/arch/alpha/pci/pci_6600.c", line 362 
[  13.8032401] cpu0: Begin traceback...
[  13.8032401] alpha trace requires known PC =eject=
[  13.8045611] cpu0: End traceback...

[  13.8045611] dump to dev 8,1 not possible
[  13.8045611] rebooting...

When activating the emulated NIC manually with ifconfig, it times out:

[ 187.4467845] tlp0: filter setup and transmit timeout
[ 187.4678969] tlp0: receive process failed to idle: state RUNNING - WAIT