INFO: task jfsCommit:136[  235.260394][   T43] INFO: task jfsCommit:136 blocked in I/O wait for more than 143 seconds.
      Tainted: G             L      syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jfsCommit       state:D stack:26960 pid:136   tgid:136   ppid:2      task_flags:0x200040 flags:0x00080000
Call Trace:
 <TASK>
 __schedule+0x16f9/0x5500
 schedule+0x164/0x360
 io_schedule+0x7f/0xd0
 lock_metapage+0x1ff/0x400
 __get_metapage+0x49a/0xe20
 diIAGRead+0xce/0x140
 diFree+0x9dd/0x2ca0
 jfs_evict_inode+0x331/0x440
 evict+0x61e/0xb10
 jfs_lazycommit+0x3ef/0xa10
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>

Showing all locks held in the system:
4 locks held by pr/legacy/17:
 #0: ffffffff8dfba4e0 (console_lock){+.+.}-{0:0}, at: legacy_kthread_func+0x1a3/0x250
 #1: ffffffff8dea1dd8 (console_srcu){....}-{0:0}, at: console_flush_one_record+0xfa/0xb90
 #2: ffffffff99b6ead8 (&port_lock_key){+.+.}-{3:3}, at: serial8250_console_write+0x179/0x1b90
 #3: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400
1 lock held by khungtaskd/43:
 #0: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by jfsCommit/136:
 #0: ffff88801eca0900 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diFree+0x2e8/0x2ca0
 #1: ffff8881169ed850 (&jfs_ip->rdwrlock/1){.+.+}-{4:4}, at: diFree+0x306/0x2ca0
2 locks held by getty/5413:
 #0: ffff8881776c70a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc90003f062e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x462/0x13a0
3 locks held by kworker/1:7/5744:
 #0: ffff888104a88538 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x897/0x1630
 #1: ffffc90007557c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8be/0x1630
 #2: ffff88816b308210 (&dev->mutex){....}-{4:4}, at: hub_event+0x17c/0x4f60
1 lock held by udevd/5770:
 #0: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0xa6/0x2550
9 locks held by syz.6.1397/10795:
 #0: ffff88811446a0d0 (&type->s_umount_key#97/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xac0
 #1: ffff88811446a770 (sb_internal#2){.+.+}-{0:0}, at: btrfs_rebuild_free_space_tree+0xbb/0x6e0
 #2: ffff8881161e31d8 (btrfs_trans_completed){.+.+}-{0:0}, at: btrfs_commit_transaction+0x17f/0x2fc0
 #3: ffff8881161e31b0 (btrfs_trans_super_committed){.+.+}-{0:0}, at: btrfs_commit_transaction+0x17f/0x2fc0
 #4: ffff8881161e3188 (btrfs_trans_unblocked){.+.+}-{0:0}, at: btrfs_commit_transaction+0x17f/0x2fc0
 #5: ffff8881161e12b8 (&fs_info->reloc_mutex){+.+.}-{4:4}, at: btrfs_commit_transaction+0xf43/0x2fc0
 #6: ffff88810a5d0548 (&head_ref->mutex){+.+.}-{4:4}, at: btrfs_delayed_ref_lock+0x88/0x2b0
 #7: ffff888174cac2c8 (&tree->lock){+.+.}-{3:3}, at: set_extent_bit+0x222/0x1cc0
 #8: ffffffff8dfc8240 (rcu_read_lock){....}-{1:3}, at: rt_spin_lock+0x1e0/0x400
1 lock held by syz.0.1399/10800:
 #0: ffffffff8f362ac0 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x4f7/0x730

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 43 Comm: khungtaskd Tainted: G             L      syzkaller #0 PREEMPT_{RT,(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+0xfd3/0x1030
 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: 17 Comm: pr/legacy Tainted: G             L      syzkaller #0 PREEMPT_{RT,(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:io_serial_out+0x7c/0xc0
Code: 21 87 fc 44 89 f9 d3 e5 49 83 ee 80 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 cc bb f0 fc 41 03 2e 89 d8 89 ea ee <5b> 41 5c 41 5e 41 5f 5d c3 cc cc cc cc cc 44 89 f9 80 e1 07 38 c1
RSP: 0018:ffffc90000167a30 EFLAGS: 00000202
RAX: 0000000000000049 RBX: 0000000000000049 RCX: 0000000000000000
RDX: 00000000000003f8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000003f8 R08: 0000000000000000 R09: 0000000000000000
R10: dffffc0000000000 R11: ffffffff853daaa0 R12: dffffc0000000000
R13: 0000000000000001 R14: ffffffff99b6eb00 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff88818e91f000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffd77321d8 CR3: 0000000112122000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 serial8250_console_write+0x12e1/0x1b90
 console_flush_one_record+0x68b/0xb90
 legacy_kthread_func+0x1b6/0x250
 kthread+0x388/0x470
 ret_from_fork+0x514/0xb70
 ret_from_fork_asm+0x1a/0x30
 </TASK>
