https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=280546
--- Comment #12 from Robin Haberkorn <robin.haberk...@googlemail.com> ---
Well actually, this might already give you some vital information, so here's
the dump of chanctx_conf:
(kgdb) bt
#0 __curthread () at /usr/src/sys/amd64/include/pcpu_aux.h:57
#1 doadump (textdump=<optimized out>) at /usr/src/sys/kern/kern_shutdown.c:405
#2 0xffffffff80b3d797 in kern_reboot (howto=260) at
/usr/src/sys/kern/kern_shutdown.c:523
#3 0xffffffff80b3dc6e in vpanic (fmt=0xffffffff8117704f "%s",
ap=ap@entry=0xfffffe00c2937ae0) at /usr/src/sys/kern/kern_shutdown.c:967
#4 0xffffffff80b3dac3 in panic (fmt=<unavailable>) at
/usr/src/sys/kern/kern_shutdown.c:891
#5 0xffffffff81025a0b in trap_fatal (frame=0xfffffe00c2937bc0, eva=12) at
/usr/src/sys/amd64/amd64/trap.c:952
#6 0xffffffff81025a56 in trap_pfault (frame=<unavailable>, usermode=false,
signo=<optimized out>, ucode=<optimized out>) at
/usr/src/sys/amd64/amd64/trap.c:760
#7 <signal handler called>
#8 0xffffffff83c68076 in iwl_mvm_bt_notif_per_link (mvm=0xfffffe00f17eb508,
vif=0xfffffe00f4c24e80, data=0xfffffe00c2937d40, link_id=0) at
/usr/src/sys/contrib/dev/iwlwifi/mvm/coex.c:292
#9 iwl_mvm_bt_notif_iterator (_data=_data@entry=0xfffffe00c2937d40,
mac=<optimized out>, vif=vif@entry=0xfffffe00f4c24e80) at
/usr/src/sys/contrib/dev/iwlwifi/mvm/coex.c:442
#10 0xffffffff80da3234 in linuxkpi_ieee80211_iterate_interfaces (hw=<optimized
out>, flags=flags@entry=(IEEE80211_IFACE_ITER_NORMAL |
IEEE80211_IFACE_ITER_ACTIVE | IEEE80211_IFACE_ITER__ATOMIC),
iterfunc=0xffffffff83c67fd0 <iwl_mvm_bt_notif_iterator>,
arg=arg@entry=0xfffffe00c2937d40) at
/usr/src/sys/compat/linuxkpi/common/src/linux_80211.c:4865
#11 0xffffffff83c6789c in ieee80211_iterate_active_interfaces_atomic
(hw=0xfffffe00c2937d40, flags=(IEEE80211_IFACE_ITER_NORMAL |
IEEE80211_IFACE_ITER_ACTIVE | IEEE80211_IFACE_ITER__ATOMIC),
arg=0xfffffe00c2937d40, iterfunc=<optimized out>) at
/usr/src/sys/compat/linuxkpi/common/include/net/mac80211.h:1468
#12 iwl_mvm_bt_coex_notif_handle (mvm=0xfffffe00f17eb508) at
/usr/src/sys/contrib/dev/iwlwifi/mvm/coex.c:459
#13 0xffffffff83c7eb7b in iwl_mvm_async_handlers_wk (wk=<optimized out>) at
/usr/src/sys/contrib/dev/iwlwifi/mvm/ops.c:1563
#14 0xffffffff80dc3064 in linux_work_fn (context=0xfffffe00f17eb588,
pending=<optimized out>) at
/usr/src/sys/compat/linuxkpi/common/src/linux_work.c:301
#15 0xffffffff80ba0d82 in taskqueue_run_locked
(queue=queue@entry=0xfffff800048f3500) at
/usr/src/sys/kern/subr_taskqueue.c:518
#16 0xffffffff80ba2002 in taskqueue_thread_loop
(arg=arg@entry=0xfffff800048322c0) at /usr/src/sys/kern/subr_taskqueue.c:830
#17 0xffffffff80af760f in fork_exit (callout=0xffffffff80ba1f40
<taskqueue_thread_loop>, arg=0xfffff800048322c0, frame=0xfffffe00c2937f40) at
/usr/src/sys/kern/kern_fork.c:1164
#18 <signal handler called>
(kgdb) f 8
#8 0xffffffff83c68076 in iwl_mvm_bt_notif_per_link (mvm=0xfffffe00f17eb508,
vif=0xfffffe00f4c24e80, data=0xfffffe00c2937d40, link_id=0) at
/usr/src/sys/contrib/dev/iwlwifi/mvm/coex.c:292
292 chanctx_conf->def.chan->band != NL80211_BAND_2GHZ)) {
(kgdb) p chanctx_conf
$1 = (struct ieee80211_chanctx_conf *) 0xfffff8004aeebd40
(kgdb) p *chanctx_conf
$2 = {def = {chan = 0x0, width = NL80211_CHAN_WIDTH_20_NOHT, center_freq1 = 0,
center_freq2 = 0, punctured = 0}, min_def = {chan = 0xfffff80048feb538, width =
82386608, center_freq1 = 4294965248,
center_freq2 = 0, punctured = 0}, ap = {chan = 0x0, width =
NL80211_CHAN_WIDTH_20_NOHT, center_freq1 = 0, center_freq2 = 0, punctured = 0},
rx_chains_dynamic = 1 '\001', rx_chains_static = 1 '\001',
radar_enabled = false, drv_priv = 0xfffff8004aeebdc0 ""}
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