INFO: task syz.7.32548:6690 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.7.32548     state:D stack:28712 pid:6690  tgid:6688  ppid:4717   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17db/0x58f0
 schedule+0x164/0x2b0
 cgroup_lock_and_drain_offline+0x51a/0x650
 cgroup1_get_tree+0x9d/0x890
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x319/0xdc0
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdeda59e159
RSP: 002b:00007fdedb53a028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fdeda825fa0 RCX: 00007fdeda59e159
RDX: 0000200000000240 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007fdeda63506b R08: 0000200000000100 R09: 0000000000000000
R10: 0000000000010012 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fdeda826038 R14: 00007fdeda825fa0 R15: 00007ffdc8922ab8
 </TASK>
INFO: task syz.6.32843:7401 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.6.32843     state:D stack:28240 pid:7401  tgid:7395  ppid:7234   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17db/0x58f0
 schedule+0x164/0x2b0
 cgroup_lock_and_drain_offline+0x51a/0x650
 cgroup1_get_tree+0x9d/0x890
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x319/0xdc0
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb5e779e159
RSP: 002b:00007fb5e8608028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fb5e7a26180 RCX: 00007fb5e779e159
RDX: 00002000000001c0 RSI: 0000200000000100 RDI: 0000000000000000
RBP: 00007fb5e783506b R08: 0000200000000000 R09: 0000000000000000
R10: 0000000002010042 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb5e7a26218 R14: 00007fb5e7a26180 R15: 00007ffdfe675e28
 </TASK>
INFO: task syz.8.33429:8795 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.8.33429     state:D stack:28808 pid:8795  tgid:8794  ppid:13085  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17db/0x58f0
 schedule+0x164/0x2b0
 cgroup_lock_and_drain_offline+0x51a/0x650
 cgroup1_get_tree+0x9d/0x890
 vfs_get_tree+0x92/0x2a0
 do_new_mount+0x319/0xdc0
 __se_sys_mount+0x31d/0x420
 do_syscall_64+0x166/0x520
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8613b9e159
RSP: 002b:00007f8614b2e028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f8613e25fa0 RCX: 00007f8613b9e159
RDX: 00002000000000c0 RSI: 0000200000000000 RDI: 0000000000000000
RBP: 00007f8613c3506b R08: 0000200000000800 R09: 0000000000000000
R10: 0000000000010012 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f8613e26038 R14: 00007f8613e25fa0 R15: 00007ffeda46fee8
 </TASK>

Showing all locks held in the system:
locks held by khungtaskd/36: 1, last CPU#1:
 #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
locks held by getty/5419: 2, on CPU#1:
 #0: ffff888115e570a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034832e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
locks held by kworker/0:6/6187: 3, on CPU#0:
 #0: ffff88810006a140 ((wq_completion)events_freezable){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #1: ffffc90003cdfc40 ((work_completion)(&hcd->wakeup_work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #2: ffff88810b5ab1d8 (&dev->mutex){....}-{4:4}, at: usb_remote_wakeup+0x23/0x120
locks held by kworker/u9:30/32230: 4, last CPU#0:
 #0: ffff888118e25940 ((wq_completion)wg-kex-wg2#17){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #1: ffffc900042ffc40 ((work_completion)(&peer->transmit_handshake_work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630
 #2: ffff888118999440 (&wg->static_identity.lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0x12e/0x810
 #3: ffff8881138b4888 (&handshake->lock){++++}-{4:4}, at: wg_noise_handshake_create_initiation+0x13f/0x810
locks held by kworker/1:7/7421: 1, last CPU#1:
 #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: process_scheduled_works+0x97a/0x1630

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 36 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+0x17d/0x390
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 kthread+0x38b/0x480
 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: 32230 Comm: kworker/u9:30 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 nsim_dev_trap_report_work
RIP: 0010:crng_fast_key_erasure+0x78/0x260
Code: ff df 48 c7 44 24 20 b3 8a b5 41 48 c7 44 24 28 46 a8 6a 8e 48 c7 44 24 30 60 4f 77 85 48 8d 5c 24 20 48 c1 eb 03 4a 89 04 3b <48> b8 f8 f8 f8 f8 f3 f3 f3 f3 4a 89 44 3b 08 e8 64 bf 50 fc 4a c7
RSP: 0018:ffffc900042ff780 EFLAGS: 00000802
RAX: f8f8f8f8f1f1f1f1 RBX: 1ffff9200085fef4 RCX: 0000000000000002
RDX: ffff8881bc506022 RSI: ffffc900042ff900 RDI: ffff888121037410
RBP: ffffc900042ff870 R08: ffffffff857743f6 R09: 0000000000000001
R10: dffffc0000000000 R11: fffffbfff20f4c50 R12: ffffc900042ff900
R13: ffff888121037410 R14: ffff888121037410 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff88818d6c7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000016c0 CR3: 0000000027cd4000 CR4: 00000000000006f0
DR0: 0000000000010000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 crng_make_state+0x1ce/0x600
 _get_random_bytes+0xff/0x260
 nsim_dev_trap_report_work+0x680/0xb40
 process_scheduled_works+0xc3d/0x1630
 worker_thread+0xa47/0xfb0
 kthread+0x38b/0x480
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
