INFO: task syz.8.1156:13154 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.1156      state:D stack:26080 pid:13154 tgid:13153 ppid:12595  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17d9/0x56c0
 schedule+0x164/0x2b0
 do_uevent+0x2c3/0x570
 __dlm_new_lockspace+0x17d1/0x1cd0
 device_create_lockspace+0xc7/0x350
 device_write+0x872/0xed0
 vfs_write+0x296/0xba0
 ksys_write+0x150/0x270
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa8cd39e0d9
RSP: 002b:00007fa8ce2b0028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa8cd625fa0 RCX: 00007fa8cd39e0d9
RDX: 0000000000000070 RSI: 0000200000001380 RDI: 0000000000000005
RBP: 00007fa8cd435024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa8cd626038 R14: 00007fa8cd625fa0 R15: 00007ffefefc42f8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/35:
 #0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
3 locks held by kworker/u9:3/83:
 #0: ffff8881000ac140 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc9000275fc40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #2: ffffffff90027f40 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60
1 lock held by dhcpcd/5345:
 #0: ffffffff90027f40 (rtnl_mutex){+.+.}-{4:4}, at: devinet_ioctl+0x2fb/0x1c50
2 locks held by getty/5428:
 #0: ffff88810eef80a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc900034732e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360
5 locks held by kworker/u8:3/5656:
 #0: ffff8881012d5940 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #1: ffffc90004c9fc40 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0
 #2: ffffffff900193a8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xf5/0x810
 #3: ffffffff90027f40 (rtnl_mutex){+.+.}-{4:4}, at: default_device_exit_batch+0xe5/0x9e0
 #4: ffffffff8eb5ff68 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
1 lock held by syz.8.1156/13154:
 #0: ffffffff9a867840 (&ls_lock){+.+.}-{4:4}, at: __dlm_new_lockspace+0xa8/0x1cd0
1 lock held by dlm_recoverd/13159:
 #0: ffff8881762e6a18 (&ls->ls_in_recovery){+.+.}-{4:4}, at: dlm_recoverd+0xbc/0x2a00
2 locks held by syz-executor/17106:
 #0: ffffffff8f793ce8 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250
 #1: ffffffff90027f40 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8a3/0x1bd0
3 locks held by syz.9.1850/17186:
 #0: ffff8881bbfe7440 (&sb->s_type->i_mutex_key#13){+.+.}-{4:4}, at: sock_close+0x82/0x220
 #1: ffff8881be3eafe0 (sk_lock-AF_PHONET){+.+.}-{0:0}, at: pep_sock_unhash+0x2a/0x280
 #2: ffffffff8eb5ff68 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x38d/0x770
2 locks held by syz.9.1850/17187:
 #0: ffffffff90008d60 (vlan_ioctl_mutex){+.+.}-{4:4}, at: sock_ioctl+0x5eb/0x7e0
 #1: ffffffff90027f40 (rtnl_mutex){+.+.}-{4:4}, at: vlan_ioctl_handler+0xf0/0x630
2 locks held by syz.3.1853/17195:

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

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/0x380
 sys_info+0x135/0x170
 watchdog+0xfd7/0x1030
 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: 17195 Comm: syz.3.1853 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
RIP: 0010:__lock_acquire+0x18fa/0x2cf0
Code: 14 25 ff 0f 00 00 39 05 c0 d6 d1 12 73 06 89 05 b8 d6 d1 12 48 8b 02 48 89 df 4c 39 e8 0f 84 34 fe ff ff 4c 89 78 30 48 8b 00 <4c> 39 e8 75 f4 48 89 df e9 20 fe ff ff 48 89 fb 48 c7 c7 d0 7d a2
RSP: 0018:ffffc9000942efc0 EFLAGS: 00000006
RAX: ffffffff971ccfb8 RBX: 00000000000003dd RCX: 0000000000000011
RDX: ffffffff96f85c48 RSI: ffff88811256e558 RDI: 00000000000003dd
RBP: a4bd745b095067e8 R08: ffffc9000942ef88 R09: 0000000000000020
R10: 0000000000000000 R11: ffffffff81a324e0 R12: 0000000000000010
R13: ffffffff94160878 R14: ffff88811256d940 R15: ffffffff96fa6788
FS:  00007f7dcba1f6c0(0000) GS:ffff88818d952000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c350607 CR3: 0000000113c4c000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 lock_acquire+0x106/0x350
 seqcount_lockdep_reader_access+0x55/0x100
 ktime_get+0x45/0x220
 clockevents_program_event+0x290/0x630
 __hrtimer_rearm_deferred+0x26c/0x420
 irqentry_exit+0x8b7/0x8f0
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:vprintk_emit+0x45d/0x560
Code: 0f 84 44 ff ff ff e8 62 67 21 00 fb eb 44 e8 5a 67 21 00 e8 75 3b 2b 0a 4d 85 f6 74 94 e8 4b 67 21 00 fb 48 c7 c7 a0 bf b4 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 fb 1b
RSP: 0018:ffffc9000942f400 EFLAGS: 00000293
RAX: ffffffff81a59a15 RBX: ffffffff81a5988f RCX: ffff88811256d940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8eb4bfa0
RBP: ffffc9000942f4b0 R08: ffffffff90574b37 R09: 1ffffffff20ae966
R10: dffffc0000000000 R11: fffffbfff20ae967 R12: 0000000000000000
R13: 0000000000000040 R14: 0000000000000200 R15: 1ffff92001285e84
 _printk+0xdd/0x130
 __ext4_msg+0x2b9/0x2d0
 ext4_mb_release_inode_pa+0x851/0xa70
 ext4_discard_preallocations+0xa25/0xf40
 ext4_release_file+0x166/0x310
 __fput+0x418/0xa50
 task_work_run+0x1d9/0x270
 do_exit+0x73a/0x2360
 do_group_exit+0x22d/0x2f0
 get_signal+0x121b/0x12c0
 arch_do_signal_or_restart+0xbb/0x860
 exit_to_user_mode_loop+0x104/0x730
 do_syscall_64+0x353/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7dcab9e0d9
Code: Unable to access opcode bytes at 0x7f7dcab9e0af.
RSP: 002b:00007f7dcba1f0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f7dcae25fa8 RCX: 00007f7dcab9e0d9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f7dcae25fac
RBP: 00007f7dcae25fa0 R08: 3fffffffffffffff R09: 0000000000000000
R10: 0000000000000038 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f7dcae26038 R14: 00007ffd3853da70 R15: 00007ffd3853db58
 </TASK>
