INFO: task syz.3.126:6526 blocked in I/O wait for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.126       state:D stack:21848 pid:6526  tgid:6525  ppid:5934   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 io_schedule+0x7f/0xd0
 lock_metapage+0x1ff/0x400
 __get_metapage+0x49a/0xe20
 xtSplitPage+0x281/0x2150
 xtSplitUp+0x33c/0x1fc0
 xtInsert+0x452/0xf20
 extAlloc+0xad9/0x1020
 jfs_get_block+0x358/0xad0
 __blockdev_direct_IO+0x161d/0x34e0
 jfs_direct_IO+0x119/0x220
 generic_file_direct_write+0x1db/0x3e0
 __generic_file_write_iter+0x11d/0x230
 generic_file_write_iter+0x14a/0x680
 iter_file_splice_write+0x9a1/0x10f0
 direct_splice_actor+0x101/0x160
 splice_direct_to_actor+0x53a/0xc70
 do_splice_direct+0x195/0x290
 do_sendfile+0x535/0x7d0
 __se_sys_sendfile64+0x144/0x1a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5d24d9cdd9
RSP: 002b:00007f5d25c27028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f5d25015fa0 RCX: 00007f5d24d9cdd9
RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000005
RBP: 00007f5d24e32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020fffe82 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5d25016038 R14: 00007f5d25015fa0 R15: 00007fff906d9048
 </TASK>
INFO: task syz.3.126:6532 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.126       state:D stack:25624 pid:6532  tgid:6525  ppid:5934   task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 __schedule+0x17b4/0x5680
 schedule+0x164/0x360
 schedule_preempt_disabled+0x13/0x30
 rwsem_down_write_slowpath+0x883/0x1080
 down_write+0x1bc/0x200
 generic_file_write_iter+0x11e/0x680
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5d24d9cdd9
RSP: 002b:00007f5d25c06028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f5d25016090 RCX: 00007f5d24d9cdd9
RDX: 0000000000000018 RSI: 0000200000000380 RDI: 0000000000000005
RBP: 00007f5d24e32d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5d25016128 R14: 00007f5d25016090 R15: 00007fff906d9048
 </TASK>

Showing all locks held in the system:
4 locks held by kworker/u10:0/27:
 #0: ffff8881626a7940 ((wq_completion)writeback){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860
 #1: ffffc90000a27c40 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860
 #2: ffff8881b054e0d8 (&type->s_umount_key#81){++++}-{4:4}, at: super_trylock_shared+0x20/0xf0
 #3: ffff88801de3bfd8 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: jfs_commit_inode+0x1ca/0x530
1 lock held by khungtaskd/34:
 #0: ffffffff8e95cd60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180
2 locks held by syslogd/5040:
 #0: ffff88812103aea0 (&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 locks held by getty/5435:
 #0: ffff88810fd440a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
 #1: ffffc9000346b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13a0
4 locks held by syz.3.126/6526:
 #0: ffff8881b054e410 (sb_writers#24){.+.+}-{0:0}, at: direct_splice_actor+0x49/0x160
 #1: ffff88801de3c378 (&sb->s_type->i_mutex_key#38){+.+.}-{4:4}, at: generic_file_write_iter+0x11e/0x680
 #2: ffff88801de3bf50 (&jfs_ip->rdwrlock#3){++++}-{4:4}, at: jfs_get_block+0x153/0xad0
 #3: ffff88801de3bfd8 (&jfs_ip->commit_mutex){+.+.}-{4:4}, at: extAlloc+0x130/0x1020
3 locks held by syz.3.126/6532:
 #0: ffff888111c81af0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320
 #1: ffff8881b054e410 (sb_writers#24){.+.+}-{0:0}, at: vfs_write+0x227/0xb90
 #2: ffff88801de3c378 (&sb->s_type->i_mutex_key#38){+.+.}-{4:4}, at: generic_file_write_iter+0x11e/0x680
2 locks held by syz.2.768/12753:

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 34 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/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: 12753 Comm: syz.2.768 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:lru_add+0x4f5/0xed0
Code: e6 01 31 ff e8 7c a7 be ff 49 83 e6 01 0f 85 d2 07 00 00 48 89 df be 08 00 00 00 e8 65 e0 29 00 48 8b 44 24 10 42 80 3c 38 00 <74> 08 48 89 df e8 e1 dd 29 00 4c 8b 33 4c 89 f6 48 81 e6 00 01 00
RSP: 0018:ffffc900088af708 EFLAGS: 00000046
RAX: 1ffffd400015eda0 RBX: ffffea0000af6d00 RCX: ffffffff8207099b
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffea0000af6d00
RBP: 0000000000000000 R08: ffffea0000af6d07 R09: 1ffffd400015eda0
R10: dffffc0000000000 R11: fffff9400015eda1 R12: ffffea0000af6d08
R13: ffff8881026eeec8 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f87d3ffd6c0(0000) GS:ffff88818dc90000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f87ccdff000 CR3: 000000010237a000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 folio_batch_move_lru+0x33b/0x550
 __folio_batch_add_and_move+0x510/0xc50
 shmem_alloc_and_add_folio+0xcdd/0xf80
 shmem_get_folio_gfp+0x5a9/0x1670
 shmem_write_begin+0x16c/0x330
 generic_perform_write+0x2e2/0x8f0
 shmem_file_write_iter+0xf8/0x120
 vfs_write+0x61d/0xb90
 ksys_write+0x150/0x270
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f87d315d60e
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:00007f87d3ffcda8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f87d3ffd6c0 RCX: 00007f87d315d60e
RDX: 0000000004000000 RSI: 00007f87c8e00000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007f87d3ffcee0 R14: 00007f87d3ffcea0 R15: 00007f87c8e00000
 </TASK>
