INFO: task syz.1.34:6161 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.34        state:D stack:28360 pid:6161  tgid:6134  ppid:5837   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x149b/0x4fd0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write+0x1ab/0x1f0
 path_openat+0xb47/0x3dd0
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x200
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f17c478f7c9
RSP: 002b:00007f17c555b038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f17c49e6090 RCX: 00007f17c478f7c9
RDX: 0000000000042042 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007f17c47f297f R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000014a R11: 0000000000000246 R12: 0000000000000000
R13: 00007f17c49e6128 R14: 00007f17c49e6090 R15: 00007ffe624fb4f8
 </TASK>
INFO: task syz.1.34:6162 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.34        state:D stack:27976 pid:6162  tgid:6134  ppid:5837   task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x149b/0x4fd0
 schedule+0x165/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x872/0xfe0
 down_write_nested+0x1b5/0x200
 filename_create+0x1fb/0x360
 do_mkdirat+0xca/0x4b0
 __x64_sys_mkdirat+0x87/0xa0
 do_syscall_64+0xec/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f17c478df17
RSP: 002b:00007f17c29f5e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007f17c29f5ef0 RCX: 00007f17c478df17
RDX: 00000000000001ff RSI: 0000200000000280 RDI: 00000000ffffff9c
RBP: 00002000000002c0 R08: 0000200000000040 R09: 0000000000000000
R10: 00002000000002c0 R11: 0000000000000246 R12: 0000200000000280
R13: 00007f17c29f5eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
 #0: ffffffff8df47578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x36e/0x6e0
1 lock held by khungtaskd/35:
 #0: ffffffff8df41a20 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
4 locks held by kworker/u9:3/947:
 #0: ffff888103ab5948 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90007797bc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffff8881136ec0e0 (&type->s_umount_key#80){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0
 #3: ffff88811624af90 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530
2 locks held by getty/5656:
 #0: ffff888175b6b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034902f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x449/0x1460
4 locks held by kworker/u8:4/5870:
 #0: ffff888100ef7948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x9b4/0x1770
 #1: ffffc90005457bc0 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x9ef/0x1770
 #2: ffffffff8f304d70 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf7/0x7a0
 #3: ffff8881bacf54e8 (&wg->device_update_lock){+.+.}-{4:4}, at: wg_destruct+0x116/0x310
4 locks held by syz.1.34/6135:
2 locks held by syz.1.34/6161:
 #0: ffff8881136ec420 (sb_writers#24){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88811624b340 (&type->i_mutex_dir_key#19){++++}-{4:4}, at: path_openat+0xb47/0x3dd0
2 locks held by syz.1.34/6162:
 #0: ffff8881136ec420 (sb_writers#24){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88811624b340 (&type->i_mutex_dir_key#18/1){+.+.}-{4:4}, at: filename_create+0x1fb/0x360
3 locks held by syz-executor/6465:
1 lock held by syz-executor/7152:
 #0: ffff888102bf00e0 (&type->s_umount_key#80){++++}-{4:4}, at: deactivate_super+0xa9/0xe0
1 lock held by syz-executor/7276:
 #0: ffffffff8df47578 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x36e/0x6e0
8 locks held by syz-executor/8645:
 #0: ffff888174e54420 (sb_writers#7){.+.+}-{0:0}, at: vfs_write+0x211/0xb30
 #1: ffff888119e9bc88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1de/0x540
 #2: ffff88810a94c1e8 (kn->active#48){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x231/0x540
 #3: ffffffff8eb9fb68 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd1/0x360
 #4: ffff88811520e0e8 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x800
 #5: ffff88811520b250 (&devlink->lock_key#4){+.+.}-{4:4}, at: nsim_drv_remove+0x50/0x160
 #6: ffffffff8f311e08 (rtnl_mutex){+.+.}-{4:4}, at: nsim_destroy+0xed/0x680
 #7: ffff8881707a4d38 (&dev_instance_lock_key#20){+.+.}-{4:4}, at: unregister_netdevice_many_notify+0x58b/0x2340

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
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+0xf95/0xfe0
 kthread+0x711/0x8a0
 ret_from_fork+0x510/0xa50
 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: 30 Comm: kworker/u9:1 Not tainted syzkaller #0 PREEMPT(full) 
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:__lock_acquire+0x47/0x2cf0
Code: e0 00 00 00 65 48 8b 04 25 08 10 80 92 48 89 44 24 08 31 ed 83 3d b8 60 e4 0d 00 0f 84 ef 13 00 00 45 89 cf 49 89 f9 48 8b 07 <48> 3d c0 c3 43 93 0f 84 da 13 00 00 41 89 cd 41 89 d6 8b 0d d1 27
RSP: 0018:ffffc90000007a40 EFLAGS: 00000002
RAX: ffffffff92867880 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881026fe228
RBP: 0000000000000000 R08: 0000000000000001 R09: ffff8881026fe228
R10: dffffc0000000000 R11: fffffbfff1f0444f R12: 0000000000000000
R13: ffff8881026fe228 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff88818e81f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056446b188131 CR3: 0000000172a84000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lock_acquire+0x107/0x340
 _raw_spin_lock_irqsave+0x40/0x60
 try_to_wake_up+0x67/0x12b0
 call_timer_fn+0x16e/0x590
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x22b/0x7c0
 do_softirq+0x76/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130
 cfg80211_inform_single_bss_data+0x12a7/0x1ad0
 cfg80211_inform_bss_data+0x203/0x3b40
 cfg80211_inform_bss_frame_data+0x3c7/0x710
 ieee80211_bss_info_update+0x749/0x9e0
 ieee80211_ibss_rx_queued_mgmt+0xa5d/0x2af0
 ieee80211_iface_work+0x85f/0x12d0
 cfg80211_wiphy_work+0x2ab/0x450
 process_scheduled_works+0xad1/0x1770
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x510/0xa50
 ret_from_fork_asm+0x1a/0x30
 </TASK>
