INFO: task syz.6.3604:23024 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.6.3604      state:D stack:24760 pid:23024 tgid:23023 ppid:21241  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x14ef/0x4fb0
 schedule+0x164/0x360
 io_schedule+0x7f/0xd0
 txBegin+0x27d/0xc00
 __jfs_xattr_set+0xa5/0x170
 __vfs_setxattr+0x43c/0x480
 __vfs_setxattr_noperm+0x12d/0x660
 vfs_setxattr+0x16a/0x2e0
 filename_setxattr+0x281/0x630
 path_setxattrat+0x3f3/0x430
 __x64_sys_setxattr+0xbc/0xe0
 do_syscall_64+0xe2/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc7ec59acb9
RSP: 002b:00007fc7ed4da028 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007fc7ec815fa0 RCX: 00007fc7ec59acb9
RDX: 0000200000000180 RSI: 0000200000000000 RDI: 0000200000000080
RBP: 00007fc7ec608bf7 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc7ec816038 R14: 00007fc7ec815fa0 R15: 00007ffc600081d8
 </TASK>

Showing all locks held in the system:
1 lock held by ksoftirqd/0/15:
7 locks held by kworker/u9:1/32:
6 locks held by kworker/1:1/33:
 #0: ffff888104e91548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc90000a97bc0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffff88816eae7198 (&dev->mutex){....}-{4:4}, at: hub_event+0x17f/0x4f30
 #3: ffff888168f4a198 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450
 #4: ffff8881606d7160 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450
 #5: ffff88816af6dc38 (&dev->ctrl_urb_lock){+.+.}-{4:4}, at: em28xx_write_regs_req+0x14d/0x3e0
1 lock held by khungtaskd/35:
 #0: ffffffff8e35a360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5659:
 #0: ffff8881134160a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0
9 locks held by kworker/1:8/6084:
 #0: ffff888104e91548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0x9d4/0x17a0
 #1: ffffc90005f3fbc0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0xa0f/0x17a0
 #2: ffff88810b1f1198 (&dev->mutex){....}-{4:4}, at: hub_event+0x17f/0x4f30
 #3: ffff888172db0198 (&dev->mutex){....}-{4:4}, at: usb_disconnect+0xf8/0x990
 #4: ffff88811d77b160 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x800
 #5: ffff8881b56c5a20 (&dev->mutex){....}-{4:4}, at: device_release_driver_internal+0xb6/0x800
 #6: ffffffff8f21ee08 (input_mutex){+.+.}-{4:4}, at: __input_unregister_device+0x328/0x640
 #7: ffff8881b99224f8 (&led_cdev->trigger_lock){+.+.}-{4:4}, at: led_classdev_unregister+0x75/0x280
 #8: ffffffff8e360c78 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
3 locks held by kworker/u9:12/9699:
4 locks held by udevd/13323:
 #0: ffff88810be96e80 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xb7/0xe10
 #1: ffff88816c58a888 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x5c/0x420
 #2: ffff8881123cb698 (kn->active#31){++++}-{0:0}, at: kernfs_seq_start+0xb2/0x420
 #3: ffff888168f4a198 (&dev->mutex){....}-{4:4}, at: manufacturer_show+0x26/0xa0
6 locks held by kworker/u9:19/18295:
2 locks held by syz.6.3604/23024:
 #0: ffff8881722be420 (sb_writers#16){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff8881bce52a18 (&sb->s_type->i_mutex_key#28){+.+.}-{4:4}, at: vfs_setxattr+0x143/0x2e0
3 locks held by dhcpcd/23503:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 35 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+0xf90/0xfe0
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 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: 18295 Comm: kworker/u9:19 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:unwind_next_frame+0x89b/0x23c0
Code: 89 ff e8 78 2a b5 00 48 8b 34 24 48 8b 54 24 08 4d 8b 27 48 8d 5a 01 48 89 d0 48 c1 e8 03 0f b6 04 28 84 c0 0f 85 db 16 00 00 <48> 89 d8 48 c1 e8 03 0f b6 04 28 84 c0 0f 84 cb 03 00 00 89 d9 80
RSP: 0018:ffffc90000007a58 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff90645195 RCX: ffffffff8fe7b978
RDX: ffffffff90645194 RSI: ffffffff90645198 RDI: ffffffff8be750a0
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8e35a360
R10: ffffc90000007b78 R11: ffffffff81ae5d30 R12: ffffc90008acfc80
R13: ffffc90000007b78 R14: ffffc90000007b28 R15: ffffc90000007b60
FS:  0000000000000000(0000) GS:ffff88818e323000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000117dc4000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 arch_stack_walk+0x11b/0x150
 stack_trace_save+0xa9/0x100
 ref_tracker_free+0x11e/0x840
 dst_destroy+0x10f/0x350
 rcu_core+0xc9e/0x1750
 handle_softirqs+0x22a/0x7c0
 do_softirq+0x76/0xd0
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xf8/0x130
 ieee80211_ibss_rx_queued_mgmt+0x1ac7/0x2c80
 ieee80211_iface_work+0x85e/0x12b0
 cfg80211_wiphy_work+0x2ab/0x450
 process_scheduled_works+0xaec/0x17a0
 worker_thread+0x89f/0xd90
 kthread+0x726/0x8b0
 ret_from_fork+0x51b/0xa40
 ret_from_fork_asm+0x1a/0x30
 </TASK>
