While iwm is associated and IPv6 autoconf addresses have been
configured by slaacd, this command can panic the kernel:
ifconfig iwm0 down delete -inet6
It doesn't trigger every time, but after a few attempts I see:
(manually transcribed from laptop screen)
panic: ni_pledge
Stopped at db_enter+0x12: popq %r11
TID PID UID PRFLAGS PFLAGS CPU COMMAND
515480 39389 0 0x10003 0 0 ksh
*364636 58348 0 0x10000 0 2K slaacd
db_enter() at db_enter()+0x12
pledge_namei(1d8ae0144a7593e2, fff8000fff4700, ffff800033333900) at
pledge_namei+0x486
namei(d760e70ada339063) at namei+0x191
loadfirmware(cf328604092015494,ffff800000643000,fff80000006a3e78) at
loadfirmware+0x100
iwm_read_firmware(fbd6fc72ee937788,0) at iwm_read_firmware+0xd7
iwm_run_init_mvm_ucode(43bdf57cafda14a,0) at iwm_run_init_mvm_ucode+0x7f
iwm_init_hw(ba11508ee2978b16) at iwm_init_hw+0x60
iwm_init(3bb467f1e40db7a) at iwm_init+0x60
iwm_ioctl(13cdfd0a249e96f,1,ffff8000001ec5e00) at iwm_ioctl+0x13
in6_ifinit(260fdd851dd74269,ffff8000000643048,ffff8000001ec5e00) at
in6_ifinit+0xab
in6_update_ifa(28ab181e693cc4a,0,ffff8000000643048) at in6_update_ifa+0xa03
in6_ifattach_linklocal(58c794df1e3d8b3,0) at in6_ifattach_linklocal+0x1fb
in6_ifattach(18ae40fc72b39c65) at in6_ifattach+0xcc
end trace frame: 0xffff800033334030
https://www.openbsd.org describes etc. etc.
etc. etc.
ddb{2}>
