INFO: task kworker/1:9:13318 blocked for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:9     state:D stack:21704 pid:13318 tgid:13318 ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events rpc_free_client_work
Call Trace:
 <TASK>
 __schedule+0x16e2/0x53f0
 schedule+0x164/0x360
 bit_wait+0x11/0xd0
 __wait_on_bit_lock+0xc9/0x5a0
 out_of_line_wait_on_bit_lock+0x13b/0x190
 xprt_destroy+0x78/0x1b0
 rpc_free_client_work+0x15a/0x310
 process_scheduled_works+0xa2f/0x1470
 worker_thread+0xa44/0xfb0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Showing all locks held in the system:
2 locks held by kworker/1:1/31:
 #0: ffff88810006b148 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9bd/0x1470
 #1: ffffc90000a67c40 ((work_completion)(&m->mpeg_thread)){+.+.}-{0:0}, at: process_scheduled_works+0x9bd/0x1470
1 lock held by khungtaskd/35:
 #0: ffffffff8e75d000 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5421:
 #0: ffff888104bc70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000356e2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x13a0
2 locks held by kworker/1:9/13318:
 #0: ffff88810006b148 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9bd/0x1470
 #1: ffffc900072ffc40 ((work_completion)(&clnt->cl_work)){+.+.}-{0:0}, at: process_scheduled_works+0x9bd/0x1470
3 locks held by kworker/1:8/25300:
 #0: ffff88810006b148 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x9bd/0x1470
 #1: ffffc90004497c40 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x9bd/0x1470
 #2: ffffffff8e7632b8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
2 locks held by kworker/u10:28/6119:
 #0: ffff888168e64148 ((wq_completion)xprtiod){+.+.}-{0:0}, at: process_scheduled_works+0x9bd/0x1470
 #1: ffffc90006f7fc40 ((work_completion)(&(&transport->connect_worker)->work)#3){+.+.}-{0:0}, at: process_scheduled_works+0x9bd/0x1470

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

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+0xf9e/0xff0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 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: 0 Comm: swapper/0 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
RIP: 0010:native_apic_msr_write+0x39/0x50
Code: 74 2a 83 ff 30 74 25 eb 10 81 ff d0 00 00 00 74 1b 81 ff e0 00 00 00 74 13 c1 ef 04 81 c7 00 08 00 00 89 f9 89 f0 31 d2 0f 30 <66> 90 e9 00 53 3c 0a cc 89 f6 31 d2 e9 b6 e4 8d 03 66 0f 1f 44 00
RSP: 0018:ffffc90000007cd0 EFLAGS: 00000046
RAX: 000000000000048a RBX: ffff888121023e40 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 000000000000048a RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff81b23015 R09: 0000000000080000
R10: 0000000000000000 R11: ffffffff81741ac0 R12: 0000000010007570
R13: dffffc0000000000 R14: 000000000000048a R15: 0000000000000020
FS:  0000000000000000(0000) GS:ffff88818de52000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000010f0d6000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <IRQ>
 lapic_next_event+0x11/0x20
 clockevents_program_event+0x1c9/0x350
 hrtimer_interrupt+0xb56/0x1060
 __sysvec_apic_timer_interrupt+0x102/0x460
 sysvec_apic_timer_interrupt+0x52/0xc0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:handle_softirqs+0x15b/0x870
Code: 89 6c 24 20 0f b7 db 48 c7 c7 20 16 cb 8b e8 ac 49 27 0a 65 66 c7 05 0a 5b 95 11 00 00 e8 dd 5e 45 00 fb 48 c7 c5 c0 c0 40 8e <b8> ff ff ff ff 0f bc c3 41 89 c4 41 ff c4 0f 84 30 04 00 00 89 5c
RSP: 0018:ffffc90000007f40 EFLAGS: 00000206
RAX: 00000000078b5d96 RBX: 0000000000000004 RCX: 0000000080000101
RDX: 0000000000000000 RSI: ffffffff8def4fc8 RDI: ffffffff8c28ad40
RBP: ffffffff8e40c0c0 R08: ffffffff901187f7 R09: 1ffffffff20230fe
R10: dffffc0000000000 R11: fffffbfff20230ff R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8e494ec0 R15: 0000000000000000
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:pv_native_safe_halt+0xf/0x20
Code: ae 6c 02 c3 cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa eb 07 0f 00 2d 93 b6 1a 00 fb f4 <e9> 8c ec 02 00 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8e407dc0 EFLAGS: 00000206
RAX: 00000000078b5d93 RBX: ffffffff819a063d RCX: 0000000080000001
RDX: 0000000000000001 RSI: ffffffff8def4fc8 RDI: ffffffff8c28ad40
RBP: ffffffff8e407eb8 R08: ffff88812103395b R09: 1ffff1102420672b
R10: dffffc0000000000 R11: ffffed102420672c R12: ffffffff901187f0
R13: 1ffffffff1c929d8 R14: 0000000000000000 R15: 0000000000000000
 default_idle+0x9/0x20
 default_idle_call+0x72/0xb0
 do_idle+0x1bd/0x500
 cpu_startup_entry+0x43/0x60
 rest_init+0x2de/0x300
 start_kernel+0x385/0x3d0
 x86_64_start_reservations+0x24/0x30
 x86_64_start_kernel+0x137/0x1b0
 common_startup_64+0x13e/0x147
 </TASK>
