IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready
device veth1_vlan entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready
------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 1 PID: 2842 at net/mac80211/main.c:1265 ieee80211_free_ack_frame+0x48/0x50 net/mac80211/main.c:1265
IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 2842 Comm: kworker/u4:3 Not tainted 4.19.158-syzkaller #0
IPv6: ADDRCONF(NETDEV_UP): veth0_macvtap: link is not ready
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2fe lib/dump_stack.c:118
 panic+0x26a/0x50e kernel/panic.c:186
 __warn.cold+0x20/0x61 kernel/panic.c:541
 report_bug+0x262/0x2b0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 fixup_bug arch/x86/kernel/traps.c:173 [inline]
 do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready
device veth0_macvtap entered promiscuous mode
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready
RIP: 0010:ieee80211_free_ack_frame+0x48/0x50 net/mac80211/main.c:1265
Code: e8 5d 65 b0 f9 48 89 ef e8 c5 79 d9 fe 31 c0 5b 5d c3 e8 4b 65 b0 f9 48 c7 c7 60 a7 66 89 c6 05 42 12 5a 03 01 e8 13 42 84 f9 <0f> 0b eb d2 0f 1f 40 00 41 57 41 56 41 55 41 54 49 bc 00 00 00 00
RSP: 0018:ffff8880ade7fa28 EFLAGS: 00010282
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff814fdba1 RDI: ffffed1015bcff37
RBP: ffff8880a501f440 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: ffff888053c79b98
R13: dffffc0000000000 R14: ffffffff87b46a80 R15: 0000000000000000
IPv6: ADDRCONF(NETDEV_UP): veth1_macvtap: link is not ready
 idr_for_each+0x132/0x290 lib/idr.c:211
IPv6: ADDRCONF(NETDEV_CHANGE): macvtap0: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_macvtap: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth0_macvtap: link becomes ready
 ieee80211_free_hw+0x88/0x140 net/mac80211/main.c:1280
 mac80211_hwsim_del_radio drivers/net/wireless/mac80211_hwsim.c:2998 [inline]
 hwsim_exit_net+0xbdf/0x1580 drivers/net/wireless/mac80211_hwsim.c:3666
device veth1_macvtap entered promiscuous mode
 ops_exit_list+0xa5/0x150 net/core/net_namespace.c:153
IPv6: ADDRCONF(NETDEV_UP): macsec0: link is not ready
 cleanup_net+0x3b4/0x8b0 net/core/net_namespace.c:553
 process_one_work+0x864/0x1570 kernel/workqueue.c:2155
device veth0_macvtap entered promiscuous mode
IPv6: ADDRCONF(NETDEV_UP): macvtap0: link is not ready
 worker_thread+0x64c/0x1130 kernel/workqueue.c:2298
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Kernel Offset: disabled
Rebooting in 86400 seconds..