mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
------------[ cut here ]------------
Have pending ack frames!
WARNING: CPU: 0 PID: 4226 at net/mac80211/main.c:1331 ieee80211_free_ack_frame+0x34/0x40 net/mac80211/main.c:1331
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 4226 Comm: kworker/u4:5 Not tainted 5.0.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x165/0x21a lib/dump_stack.c:113
 panic+0x212/0x40b kernel/panic.c:214
 __warn.cold.7+0x1b/0x38 kernel/panic.c:571
 report_bug+0x1a4/0x200 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:973
RIP: 0010:ieee80211_free_ack_frame+0x34/0x40 net/mac80211/main.c:1331
Code: 1b c4 bd 02 00 74 0c 48 89 f7 e8 77 b0 e1 fe 31 c0 c9 c3 48 c7 c7 e0 e5 17 88 48 89 75 f8 c6 05 fb c3 bd 02 01 e8 6f b0 97 fa <0f> 0b 48 8b 75 f8 eb d5 0f 1f 40 00 55 be 04 00 00 00 48 89 e5 41
RSP: 0018:ffff88808a467948 EFLAGS: 00010286
RAX: 0000000000000000 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: 0000000000000004 RSI: 0000000000000008 RDI: ffffffff8a5a4de0
RBP: ffff88808a467950 R08: ffffed1015d03f01 R09: ffffed1015d03f00
R10: ffffed1015d03f00 R11: ffff8880ae81f807 R12: 0000000000000000
R13: ffffffff86a3e710 R14: ffff88807cdd84b0 R15: ffff88808a467a08
 idr_for_each+0x10c/0x1f0 lib/idr.c:207
 ieee80211_free_hw+0x87/0x250 net/mac80211/main.c:1347
 mac80211_hwsim_del_radio+0x2b0/0x360 drivers/net/wireless/mac80211_hwsim.c:3028
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
 hwsim_exit_net+0x869/0x1200 drivers/net/wireless/mac80211_hwsim.c:3764
 ops_exit_list.isra.0+0x8b/0x120 net/core/net_namespace.c:153
 cleanup_net+0x363/0x840 net/core/net_namespace.c:551
 process_one_work+0x7b9/0x15e0 kernel/workqueue.c:2173
 worker_thread+0x85/0xb60 kernel/workqueue.c:2319
 kthread+0x324/0x3e0 kernel/kthread.c:246
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Kernel Offset: disabled
Rebooting in 86400 seconds..