INFO: task jfsCommit:129 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:27096 pid:129   tgid:129   ppid:2      task_flags:0x200040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5387 [inline]
 __schedule+0x1681/0x54c0 kernel/sched/core.c:7188
 __schedule_loop kernel/sched/core.c:7267 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7282
 io_schedule+0x80/0xe0 kernel/sched/core.c:8109
 __lock_metapage fs/jfs/jfs_metapage.c:52 [inline]
 lock_metapage+0x1ff/0x400 fs/jfs/jfs_metapage.c:66
 __get_metapage+0x49a/0xe20 fs/jfs/jfs_metapage.c:749
 diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672
 diFree+0x9dd/0x2ca0 fs/jfs/jfs_imap.c:959
 jfs_evict_inode+0x331/0x440 fs/jfs/inode.c:162
 evict+0x61e/0xb10 fs/inode.c:841
 txLazyCommit fs/jfs/jfs_txnmgr.c:2666 [inline]
 jfs_lazycommit+0x3ef/0xa10 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
 </TASK>
INFO: task syz-executor:8367 blocked for more than 143 seconds.
      Not tainted syzkaller #0
      Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:22464 pid:8367  tgid:8367  ppid:1      task_flags:0x40014c flags:0x00080001
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5387 [inline]
 __schedule+0x1681/0x54c0 kernel/sched/core.c:7188
 __schedule_loop kernel/sched/core.c:7267 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7282
 jfs_flush_journal+0x721/0xf50 fs/jfs/jfs_logmgr.c:1561
 jfs_sync_fs+0x7d/0xa0 fs/jfs/super.c:649
 sync_filesystem+0x1ce/0x250 fs/sync.c:66
 generic_shutdown_super+0x77/0x2d0 fs/super.c:625
 kill_block_super+0x44/0x90 fs/super.c:1725
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x70f/0x22c0 kernel/exit.c:975
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1117
 __do_sys_exit_group kernel/exit.c:1128 [inline]
 __se_sys_exit_group kernel/exit.c:1126 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1126
 x64_sys_call+0x221a/0x2240 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f873a3bc819
RSP: 002b:00007ffe3ed44a08 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f873a45206d RCX: 00007f873a3bc819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000002 R08: 0000000000000000 R09: 00007f873a452048
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe3ed45cc0
R13: 00007f873a452048 R14: 000000000008516b R15: 00007ffe3ed47e80
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/38:
 #0: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
 #0: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
 #0: ffffffff8dfc80c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by kworker/u8:4/66:
 #0: ffff88801a08c938 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3277 [inline]
 #0: ffff88801a08c938 ((wq_completion)events_unbound#2){+.+.}-{0:0}, at: process_scheduled_works+0xa35/0x1860 kernel/workqueue.c:3385
 #1: ffffc9000151fc40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3278 [inline]
 #1: ffffc9000151fc40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0xa70/0x1860 kernel/workqueue.c:3385
2 locks held by jfsCommit/129:
 #0: ffff888055dc0900 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diFree+0x2e8/0x2ca0 fs/jfs/jfs_imap.c:889
 #1: ffff888040b70168 (&jfs_ip->rdwrlock/1){++++}-{4:4}, at: diFree+0x306/0x2ca0 fs/jfs/jfs_imap.c:894
1 lock held by dhcpcd/5479:
 #0: ffffffff8f36ba38 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 #0: ffffffff8f36ba38 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_deladdr+0x1c1/0x790 net/ipv4/devinet.c:670
2 locks held by getty/5573:
 #0: ffff888037a3c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc90003cb62e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x462/0x13a0 drivers/tty/n_tty.c:2211
4 locks held by kworker/u8:0/8164:
2 locks held by udevd/8255:
1 lock held by syz-executor/8367:
 #0: ffff888024bde0d0 (&type->s_umount_key#96){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
 #0: ffff888024bde0d0 (&type->s_umount_key#96){++++}-{4:4}, at: __super_lock_excl fs/super.c:73 [inline]
 #0: ffff888024bde0d0 (&type->s_umount_key#96){++++}-{4:4}, at: deactivate_super+0xa9/0xe0 fs/super.c:508
1 lock held by udevd/8404:
 #0: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
 #0: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: get_partial_node_bulk mm/slub.c:3736 [inline]
 #0: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: __refill_objects_node+0x87/0x560 mm/slub.c:7103
1 lock held by udevd/8576:
 #0: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
 #0: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: get_partial_node_bulk mm/slub.c:3736 [inline]
 #0: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: __refill_objects_node+0x87/0x560 mm/slub.c:7103
1 lock held by syz.9.576/9589:
 #0: ffff888024bde0d0 (&type->s_umount_key#96){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
 #0: ffff888024bde0d0 (&type->s_umount_key#96){++++}-{4:4}, at: super_lock+0x2d6/0x3d0 fs/super.c:122
1 lock held by syz.6.579/9610:
 #0: ffff888024bde0d0 (&type->s_umount_key#96){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
 #0: ffff888024bde0d0 (&type->s_umount_key#96){++++}-{4:4}, at: super_lock+0x2d6/0x3d0 fs/super.c:122
4 locks held by syz-executor/9712:
 #0: ffff888025a5a480 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:493
 #1: ffff888074120388 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1074 [inline]
 #1: ffff888074120388 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2914 [inline]
 #1: ffff888074120388 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2938 [inline]
 #1: ffff888074120388 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: filename_rmdir+0x1cd/0x520 fs/namei.c:5414
 #2: ffff888066228b00 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: inode_lock include/linux/fs.h:1029 [inline]
 #2: ffff888066228b00 (&type->i_mutex_dir_key#5){++++}-{4:4}, at: vfs_rmdir+0x109/0x6f0 fs/namei.c:5351
 #3: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
 #3: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: get_partial_node_bulk mm/slub.c:3736 [inline]
 #3: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: __refill_objects_node+0x87/0x560 mm/slub.c:7103
11 locks held by syz-executor/10110:
1 lock held by udevd/10208:
 #0: ffff888022a18948 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1044 [inline]
 #0: ffff888022a18948 (&sb->s_type->i_mutex_key#9){++++}-{4:4}, at: blkdev_read_iter+0x2ff/0x440 block/fops.c:854
2 locks held by syz.4.697/10469:
6 locks held by syz.1.698/10477:
1 lock held by modprobe/10493:
 #0: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: spin_lock include/linux/spinlock_rt.h:45 [inline]
 #0: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: get_partial_node_bulk mm/slub.c:3736 [inline]
 #0: ffff88801a020c58 (&n->list_lock){+.+.}-{3:3}, at: __refill_objects_node+0x87/0x560 mm/slub.c:7103

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

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 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+0xfd3/0x1030 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
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 10110 Comm: syz-executor Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:__bfs kernel/locking/lockdep.c:1815 [inline]
RIP: 0010:__bfs_backwards kernel/locking/lockdep.c:1860 [inline]
RIP: 0010:check_irq_usage kernel/locking/lockdep.c:2796 [inline]
RIP: 0010:check_prev_add kernel/locking/lockdep.c:3169 [inline]
RIP: 0010:check_prevs_add kernel/locking/lockdep.c:3284 [inline]
RIP: 0010:validate_chain kernel/locking/lockdep.c:3908 [inline]
RIP: 0010:__lock_acquire+0x197b/0x2cf0 kernel/locking/lockdep.c:5237
Code: 13 25 ff 0f 00 00 39 05 3f 8f d9 11 73 06 89 05 37 8f d9 11 48 8b 02 48 89 df 4c 39 e8 0f 84 2c fe ff ff 4c 89 60 30 48 8b 00 <4c> 39 e8 75 f4 48 89 df e9 18 fe ff ff 48 89 fb 48 c7 c7 d0 53 e9
RSP: 0000:ffffc90005ad6830 EFLAGS: 00000006
RAX: ffffffff9624cb78 RBX: 00000000000003cd RCX: 0000000000000039
RDX: ffffffff95fdaf48 RSI: ffff888029872c98 RDI: 00000000000003cd
RBP: 801f28fb96140288 R08: ffffc90005ad67f8 R09: 0000000000000020
R10: dffffc0000000000 R11: ffffffff81a0d9a0 R12: ffffffff96024198
R13: ffffffff931b46f0 R14: ffff888029871ec0 R15: 0000000000000038
FS:  000055557a369500(0000) GS:ffff8881260fb000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fef03a5a000 CR3: 000000003c218000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lock_acquire+0x106/0x350 kernel/locking/lockdep.c:5868
 seqcount_lockdep_reader_access+0x55/0x100 include/linux/seqlock.h:73
 ktime_get+0x45/0x220 kernel/time/timekeeping.c:965
 hrtick_schedule_exit kernel/sched/core.c:985 [inline]
 finish_lock_switch kernel/sched/core.c:5123 [inline]
 finish_task_switch+0x312/0xbe0 kernel/sched/core.c:5242
 context_switch kernel/sched/core.c:5390 [inline]
 __schedule+0x1689/0x54c0 kernel/sched/core.c:7188
 preempt_schedule_common+0x82/0xd0 kernel/sched/core.c:7369
 preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
 class_preempt_destructor include/linux/preempt.h:468 [inline]
 raw_spin_unlock_irqrestore_wake include/linux/sched/wake_q.h:102 [inline]
 rtlock_slowlock kernel/locking/rtmutex.c:1912 [inline]
 rtlock_lock kernel/locking/spinlock_rt.c:43 [inline]
 __rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline]
 rt_spin_lock+0x316/0x400 kernel/locking/spinlock_rt.c:57
 spin_lock include/linux/spinlock_rt.h:45 [inline]
 __slab_free+0xf1/0x2a0 mm/slub.c:5554
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x99/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350
 kasan_slab_alloc include/linux/kasan.h:253 [inline]
 slab_post_alloc_hook mm/slub.c:4569 [inline]
 slab_alloc_node mm/slub.c:4898 [inline]
 kmem_cache_alloc_node_noprof+0x22a/0x6e0 mm/slub.c:4950
 __alloc_skb+0x1d0/0x7d0 net/core/skbuff.c:702
 alloc_skb include/linux/skbuff.h:1383 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 inet6_ifmcaddr_notify+0xfa/0x1e0 net/ipv6/mcast.c:909
 __ipv6_dev_mc_inc+0x8a9/0xa50 net/ipv6/mcast.c:973
 ipv6_add_dev+0xe81/0x1400 net/ipv6/addrconf.c:475
 addrconf_notify+0x771/0x1050 net/ipv6/addrconf.c:3662
 notifier_call_chain+0x1ad/0x3d0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2287 [inline]
 call_netdevice_notifiers net/core/dev.c:2301 [inline]
 register_netdevice+0x1751/0x1d10 net/core/dev.c:11508
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:1067 [inline]
 nsim_create+0xbff/0x1170 drivers/net/netdevsim/netdev.c:1149
 __nsim_dev_port_add+0x857/0xd30 drivers/net/netdevsim/dev.c:1509
 nsim_dev_port_add_all+0x37/0xf0 drivers/net/netdevsim/dev.c:1570
 nsim_drv_probe+0x90d/0xc30 drivers/net/netdevsim/dev.c:1731
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x267/0xaf0 drivers/base/dd.c:709
 __driver_probe_device+0x1ef/0x380 drivers/base/dd.c:871
 driver_probe_device+0x4f/0x240 drivers/base/dd.c:901
 __device_attach_driver+0x279/0x430 drivers/base/dd.c:1029
 bus_for_each_drv+0x25b/0x2f0 drivers/base/bus.c:500
 __device_attach+0x2c8/0x450 drivers/base/dd.c:1101
 device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1156
 bus_probe_device+0x12d/0x220 drivers/base/bus.c:613
 device_add+0x7e9/0xbb0 drivers/base/core.c:3706
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:471 [inline]
 new_device_store+0x37b/0x710 drivers/net/netdevsim/bus.c:191
 kernfs_fop_write_iter+0x3b0/0x540 fs/kernfs/file.c:352
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x629/0xba0 fs/read_write.c:688
 ksys_write+0x156/0x270 fs/read_write.c:740
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3a7ba5d04e
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:00007fff8ccfa8e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000055557a369500 RCX: 00007f3a7ba5d04e
RDX: 0000000000000003 RSI: 00007fff8ccfa970 RDI: 0000000000000005
RBP: 00007f3a7bb33538 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003
R13: 00007fff8ccfa970 R14: 00007f3a7c844620 R15: 0000000000000003
 </TASK>