INFO: task syz.1.2052:16680 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2052      state:D stack:22744 pid:16680 tgid:16679 ppid:16331  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x6d9/0x940
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 __iterate_supers+0x126/0x250
 __se_sys_quotactl+0x3a7/0x9e0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f667259cdd9
RSP: 002b:00007f66707ee028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f6672815fa0 RCX: 00007f667259cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000102
RBP: 00007f6672632d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6672816038 R14: 00007f6672815fa0 R15: 00007ffedbb01748
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cda0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
6 locks held by kworker/1:3/5077:
 #0: ffff888168aba940 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc900017afc40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff8881092d31d8 (&dev->mutex){....}-{4:4}, at: hub_event+0x17f/0x4f30
 #3: ffff8881092d0568 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x217a/0x4f30
 #4: ffff888109348d60 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x21a2/0x4f30
 #5: ffffffff8f680fa8 (ehci_cf_port_reset_rwsem){.+.+}-{4:4}, at: hub_port_reset+0x14e/0x1840
2 locks held by getty/5440:
 #0: ffff8881754570a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000346b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
4 locks held by syz-executor/9561:
1 lock held by syz.1.2052/16680:
 #0: ffff8881be2d80d8 (&type->s_umount_key#57){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
2 locks held by syz-executor/17663:
 #0: ffff88810a43c0d8 (&type->s_umount_key#114){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8edf8a40 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/17814:
 #0: ffff888113a940d8 (&type->s_umount_key#114){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8edf8a40 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/18357:
 #0: ffff88816bafc0d8 (&type->s_umount_key#114){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8edf8a40 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520
2 locks held by syz-executor/19063:
 #0: ffff88816d8820d8 (&type->s_umount_key#114){+.+.}-{4:4}, at: deactivate_super+0xa9/0xe0
 #1: ffffffff8edf8a40 (jfs_log_mutex){+.+.}-{4:4}, at: lmLogClose+0xb4/0x520

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150
 nmi_cpu_backtrace+0x274/0x2d0
 nmi_trigger_cpumask_backtrace+0x17a/0x300
 sys_info+0x135/0x170
 watchdog+0xfd3/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 18115 Comm: kworker/u10:1 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:cfg80211_get_ies_channel_number+0x284/0x8d0
Code: ff ff ff 89 d9 80 e1 07 38 c1 7c 9f 48 89 df e8 c2 2c 3c f7 eb 95 4d 85 ff 4c 8b 3c 24 0f 84 dc 00 00 00 4d 89 f5 49 8d 5f 01 <49> 89 dc 49 c1 ec 03 48 b8 00 00 00 00 00 fc ff df 41 0f b6 04 04
RSP: 0018:ffffc900039f6eb0 EFLAGS: 00000206
RAX: 0000000000000002 RBX: ffff8881a7d0edf5 RCX: 0000000000000005
RDX: ffffffff8af4cecb RSI: ffffffff900279e0 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffff88816e44d880 R09: 0000000000000002
R10: 0000000000000004 R11: 0000000000000000 R12: 1ffff1103394c683
R13: 0000000000000028 R14: 0000000000000028 R15: ffff8881a7d0edf4
FS:  0000000000000000(0000) GS:ffff88818dc93000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c1867100e0 CR3: 000000019fb32000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 cfg80211_inform_single_bss_data+0x286/0x1af0
 cfg80211_inform_bss_data+0x266/0x3c40
 cfg80211_inform_bss_frame_data+0x3c7/0x730
 ieee80211_bss_info_update+0x794/0xa40
 ieee80211_ibss_rx_queued_mgmt+0x1901/0x2cb0
 ieee80211_iface_work+0x845/0x1380
 cfg80211_wiphy_work+0x2cf/0x460
 process_scheduled_works+0xb5d/0x1860
 worker_thread+0xa53/0xfc0
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
