INFO: task syz.1.1052:11103 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.1.1052      state:D stack:27872 pid:11103 tgid:11101 ppid:10981  task_flags:0x400040 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x15dd/0x52d0
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_read_slowpath+0x61e/0x920
 down_read+0x99/0x2e0
 super_lock+0x2d6/0x3d0
 user_get_super+0xc8/0x120
 __se_sys_quotactl+0x540/0x9e0
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe67b39c819
RSP: 002b:00007fe6795d5028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007fe67b616090 RCX: 00007fe67b39c819
RDX: 0000000000000000 RSI: 00002000000000c0 RDI: ffffffff80000801
RBP: 00007fe67b432c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000200000000040 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe67b616128 R14: 00007fe67b616090 R15: 00007ffe9ca994b8
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/34:
 #0: ffffffff8e75e5e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by getty/5634:
 #0: ffff8881131e80a0 (&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
2 locks held by syz-executor/5804:
2 locks held by syz-executor/5808:
2 locks held by syz-executor/6771:
3 locks held by kworker/0:7/8280:
 #0: ffff88810006b148 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0
 #1: ffffc9000a18fc40 ((fqdir_free_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0
 #2: ffffffff8e7647c0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x580
1 lock held by syz.1.1052/11103:
 #0: ffff88810fc3e0e0 (&type->s_umount_key#67){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
3 locks held by kworker/u9:19/12477:
 #0: ffff88812103ae60 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x31/0x150
 #1: ffff888121024588 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x53/0x880
 #2: ffff888121026118 (&base->lock){-.-.}-{2:2}, at: __mod_timer+0x1ae/0xf30
1 lock held by syz.2.1495/12860:
 #0: ffff88811dab80e0 (&type->s_umount_key#67){++++}-{4:4}, at: super_lock+0x2d6/0x3d0
9 locks held by syz-executor/13617:
1 lock held by syz.9.1708/13664:
3 locks held by syz.3.1711/13675:
 #0: ffff888198e9e208 (&sb->s_type->i_mutex_key#14){+.+.}-{4:4}, at: sock_close+0x9b/0x240
 #1: ffff88803712d260 (sk_lock-AF_CAN){+.+.}-{0:0}, at: bcm_release+0x1cd/0x940
 #2: ffffffff8e7648f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2d0/0x770
1 lock held by dhcpcd-run-hook/13682:

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

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 34 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+0xfd9/0x1030
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 13617 Comm: syz-executor 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 c3 cc cc cc cc cc 89 f6 31 d2 e9 46 77 77 03 66 0f 1f 44 00
RSP: 0018:ffffc90000a08e48 EFLAGS: 00000046
RAX: 000000000006d752 RBX: ffff88823c623e40 RCX: 0000000000000838
RDX: 0000000000000000 RSI: 000000000006d752 RDI: 0000000000000838
RBP: 0000000000000000 R08: ffffffff81b2db15 R09: ffffffff9a2c3508
R10: 0000000000000003 R11: ffffffff8173caf0 R12: 0000000010000d6b
R13: dffffc0000000000 R14: 000000000006d752 R15: 0000000000000020
FS:  0000555561e7c500(0000) GS:ffff8882a9457000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe5b11435c0 CR3: 0000000021c98000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 lapic_next_event+0x11/0x20
 clockevents_program_event+0x1c9/0x350
 hrtimer_interrupt+0xb08/0x1010
 __sysvec_apic_timer_interrupt+0x102/0x460
 sysvec_apic_timer_interrupt+0xa1/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:vprintk_emit+0x45d/0x560
Code: 0f 84 44 ff ff ff e8 32 3a 21 00 fb eb 44 e8 2a 3a 21 00 e8 c5 ad 0a 0a 4d 85 f6 74 94 e8 1b 3a 21 00 fb 48 c7 c7 00 0a 75 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 6b 16
RSP: 0018:ffffc9000654e920 EFLAGS: 00000293
RAX: ffffffff81a474d5 RBX: ffffffff81a4734f RCX: ffff888111a51d40
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8e750a00
RBP: ffffc9000654e9d0 R08: ffffffff9011c9b7 R09: 1ffffffff2023936
R10: dffffc0000000000 R11: fffffbfff2023937 R12: 0000000000000000
R13: 0000000000000032 R14: 0000000000000200 R15: 1ffff92000ca9d28
 dev_vprintk_emit+0x355/0x420
 dev_printk_emit+0xee/0x140
 __netdev_printk+0x3e1/0x480
 netdev_info+0x11e/0x180
 netif_change_name+0x895/0x960
 do_setlink+0xb6c/0x4590
 rtnl_newlink+0x15a9/0x1be0
 rtnetlink_rcv_msg+0x7d5/0xbe0
 netlink_rcv_skb+0x232/0x4b0
 netlink_unicast+0x80f/0x9b0
 netlink_sendmsg+0x813/0xb40
 __sys_sendto+0x672/0x710
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe5b035d04e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fff07532f38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000555561e7c500 RCX: 00007fe5b035d04e
RDX: 0000000000000030 RSI: 00007fe5b1143610 RDI: 0000000000000006
RBP: 0000000000000001 R08: 00007fff07532fb4 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000006
R13: 0000000000000000 R14: 00007fe5b1143610 R15: 0000000000000000
 </TASK>
