INFO: task jfsCommit:128 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:jfsCommit state:D stack:27720 pid:128 tgid:128 ppid:2 task_flags:0x200040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x16dc/0x5500 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
io_schedule+0x80/0xe0 kernel/sched/core.c:8154
__lock_metapage fs/jfs/jfs_metapage.c:52 [inline]
lock_metapage+0x1fe/0x400 fs/jfs/jfs_metapage.c:66
__get_metapage+0x47a/0xdf0 fs/jfs/jfs_metapage.c:749
diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672
diFree+0x9ce/0x2cc0 fs/jfs/jfs_imap.c:959
jfs_evict_inode+0x324/0x430 fs/jfs/inode.c:162
evict+0x624/0xb50 fs/inode.c:825
txLazyCommit fs/jfs/jfs_txnmgr.c:2666 [inline]
jfs_lazycommit+0x3f3/0xa20 fs/jfs/jfs_txnmgr.c:2735
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Showing all locks held in the system:
1 lock held by khungtaskd/38:
#0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8e1c3000 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
5 locks held by kworker/u8:2/43:
3 locks held by kworker/u8:3/44:
#0: ffff88803279e138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#0: ffff88803279e138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#1: ffffc90000b67c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#1: ffffc90000b67c40 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#2: ffffffff8f5b05f8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#2: ffffffff8f5b05f8 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0x123/0x16e0 net/ipv6/addrconf.c:4229
6 locks held by kworker/u8:5/100:
2 locks held by jfsCommit/128:
#0: ffff88803d7a0900 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diFree+0x2da/0x2cc0 fs/jfs/jfs_imap.c:889
#1: ffff88805de88b10 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diFree+0x2f8/0x2cc0 fs/jfs/jfs_imap.c:894
4 locks held by kworker/u8:6/155:
8 locks held by kworker/u8:7/184:
8 locks held by kworker/u8:11/2246:
9 locks held by kworker/u8:12/2252:
3 locks held by kworker/u9:1/4912:
#0: ffff88802c014138 ((wq_completion)hci5){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#0: ffff88802c014138 ((wq_completion)hci5){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#1: ffffc90010b1fc40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#1: ffffc90010b1fc40 ((work_completion)(&hdev->cmd_sync_work)){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#2: ffff88805fb70f80 (&hdev->req_lock){+.+.}-{4:4}, at: hci_cmd_sync_work+0x1cb/0x3f0 net/bluetooth/hci_sync.c:331
2 locks held by udevd/4963:
#0: ffff888037fb1058 (&ep->mtx){+.+.}-{4:4}, at: ep_send_events fs/eventpoll.c:2130 [inline]
#0: ffff888037fb1058 (&ep->mtx){+.+.}-{4:4}, at: ep_try_send_events+0x195/0xc70 fs/eventpoll.c:2208
#1: ffff888037fb1208 (&ep->lock){+.+.}-{3:3}, at: spin_lock_irq include/linux/spinlock_rt.h:96 [inline]
#1: ffff888037fb1208 (&ep->lock){+.+.}-{3:3}, at: ep_start_scan+0xa1/0x3b0 fs/eventpoll.c:960
2 locks held by getty/5353:
#0: ffff8880361ac0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003cb32e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
3 locks held by kworker/u8:0/8612:
#0: ffff88813ff5c138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#0: ffff88813ff5c138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#1: ffffc900043efc40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3297 [inline]
#1: ffffc900043efc40 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0xa20/0x14e0 kernel/workqueue.c:3405
#2: ffffffff8f5b05f8 (rtnl_mutex){+.+.}-{4:4}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:313
1 lock held by syz-executor/10185:
#0: ffffffff8f5b05f8 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
#0: ffffffff8f5b05f8 (rtnl_mutex){+.+.}-{4:4}, at: inet6_rtm_newaddr+0x65e/0xdf0 net/ipv6/addrconf.c:5062
1 lock held by syz.4.651/10875:
#0: ffff88803704e0d0 (&type->s_umount_key#71){++++}-{4:4}, at: jfs_ioc_trim+0x1b6/0x670 fs/jfs/jfs_discard.c:86
6 locks held by syz.1.653/10879:
3 locks held by syz.0.652/10882:
3 locks held by syz.2.654/10895:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd7/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10898 Comm: dhcpcd-run-hook Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:lock_acquire+0xb5/0x350 kernel/locking/lockdep.c:-1
Code: 0f 84 ce 00 00 00 65 8b 05 70 be fc 10 85 c0 0f 85 bf 00 00 00 65 48 8b 05 80 78 fc 10 83 b8 04 0c 00 00 00 0f 85 aa 00 00 00 <4c> 89 74 24 10 4d 89 fe 9c 41 5f fa 48 c7 c7 99 ac 89 8d e8 93 bb
RSP: 0018:ffffc900042df780 EFLAGS: 00000246
RAX: ffff88802c169f00 RBX: 0000000000000000 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8b43b843 RDI: 1ffff1100ba93ce3
RBP: ffffffff821b0a4d R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e1c3000 R12: 0000000000000000
R13: ffff88805d49e718 R14: 0000000000000000 R15: 0000000000000001
FS: 00007f3117a2ac80(0000) GS:ffff888125d4c000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3117a2af50 CR3: 0000000028ae6000 CR4: 00000000003526f0
Call Trace:
rt_spin_lock+0x83/0x400 kernel/locking/spinlock_rt.c:56
spin_lock include/linux/spinlock_rt.h:45 [inline]
pte_offset_map_lock+0x13d/0x210 mm/pgtable-generic.c:404
wp_page_copy mm/memory.c:3911 [inline]
do_wp_page+0x1964/0x3d90 mm/memory.c:4336
handle_pte_fault mm/memory.c:6395 [inline]
__handle_mm_fault mm/memory.c:6517 [inline]
handle_mm_fault+0xa03/0x13f0 mm/memory.c:6686
do_user_addr_fault+0x744/0x1340 arch/x86/mm/fault.c:1394
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0010:__put_user_4+0xd/0x30 arch/x86/lib/putuser.S:94
Code: 66 89 01 31 c9 0f 01 ca e9 80 59 04 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 89 cb 48 c1 fb 3f 48 09 d9 0f 01 cb <89> 01 31 c9 0f 01 ca e9 57 59 04 00 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900042dfe48 EFLAGS: 00050206
RAX: 0000000000002a92 RBX: 0000000000000000 RCX: 00007f3117a2af50
RDX: 0000000000000000 RSI: ffffffff8daf0736 RDI: ffff88802c169f00
RBP: ffffc900042dff38 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8e1c3000 R12: 1ffff1100582d4c7
R13: dffffc0000000000 R14: ffff88802c169f00 R15: dffffc0000000000
schedule_tail+0x9d/0xc0 kernel/sched/core.c:5442
ret_from_fork+0x83/0xb70 arch/x86/kernel/process.c:154
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245