Kernel panic - not syncing: kernel: panic_on_warn set ...
CPU: 1 UID: 0 PID: 1192 Comm: kworker/u32:10 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x3d/0x1f0 lib/dump_stack.c:120
 vpanic+0x640/0x6f0 kernel/panic.c:489
 panic+0xca/0xd0 kernel/panic.c:626
 check_panic_on_warn kernel/panic.c:376 [inline]
 check_panic_on_warn+0xab/0xb0 kernel/panic.c:371
 __warn+0xf6/0x3c0 kernel/panic.c:897
 __report_bug lib/bug.c:195 [inline]
 report_bug+0x3c3/0x580 lib/bug.c:215
 handle_bug+0x184/0x210 arch/x86/kernel/traps.c:338
 exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:392
 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:616
RIP: 0010:drv_unassign_vif_chanctx+0x247/0x850 net/mac80211/driver-ops.c:366
Code: 74 24 10 48 81 c6 20 01 00 00 48 89 74 24 10 e8 8f 37 f2 f6 8b 54 24 04 48 8b 74 24 10 48 c7 c7 20 a4 e2 8c e8 3a ba b0 f6 90 <0f> 0b 90 90 e8 70 37 f2 f6 4c 89 f2 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc90006db75a8 EFLAGS: 00010282
RAX: 0000000000000000 RBX: ffff88805e5f0d80 RCX: ffffffff817aee58
RDX: ffff888027228000 RSI: ffffffff817aee65 RDI: 0000000000000001
RBP: ffff88806b038e80 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88805e5f2ae8
R13: 0000000000000000 R14: ffff88805e5f17b8 R15: ffff88805e5f2a90
 ieee80211_assign_link_chanctx+0x3f1/0xf00 net/mac80211/chan.c:905
 __ieee80211_link_release_channel+0x273/0x4b0 net/mac80211/chan.c:1879
 ieee80211_link_release_channel+0x128/0x200 net/mac80211/chan.c:2154
 unregister_netdevice_many_notify+0x1402/0x25c0 net/core/dev.c:12305
 unregister_netdevice_many net/core/dev.c:12347 [inline]
 unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:12161
 unregister_netdevice include/linux/netdevice.h:3389 [inline]
 _cfg80211_unregister_wdev+0x64b/0x830 net/wireless/core.c:1284
 ieee80211_remove_interfaces+0x34e/0x740 net/mac80211/iface.c:2386
 ieee80211_unregister_hw+0x55/0x3a0 net/mac80211/main.c:1681
 mac80211_hwsim_del_radio drivers/net/wireless/virtual/mac80211_hwsim.c:5909 [inline]
 hwsim_exit_net+0x788/0x1590 drivers/net/wireless/virtual/mac80211_hwsim.c:6799
 ops_exit_list net/core/net_namespace.c:199 [inline]
 ops_undo_list+0x2ee/0xab0 net/core/net_namespace.c:252
 cleanup_net+0x41b/0x8b0 net/core/net_namespace.c:695
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3263
 process_scheduled_works kernel/workqueue.c:3346 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3427
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x675/0x7d0 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..