Nov 1 07:56:22 syzkaller daemon.err dhcpcd[5493]: libudev: reNov 1 07:56:22 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL deviceNov 1 07:56:22 Nov 1 07:56:22 syzkaller daemon.err dhcpcd[5493]: libudev: receNov 1 07:56:22 syzkaller daemonNov 1 07:56:22 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:22 syzkaller daemNov 1 07:56:22 Nov 1 07:56:23 Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 syzkaller daNov 1 07:56:23 Nov 1 07:56:23 Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 syzkaller daemon.err dhcpcd[54[ 1547.583132][ T30] INFO: task kworker/0:2:965 blocked for more than 143 seconds. 93]: libudev: received NULL deviNov 1 07:56:23 [ 1547.596095][ T30] Not tainted 6.12.0-rc5-syzkaller-00181-g6c52d4da1c74 #0 Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: rece[ 1547.608841][ T62] IPVS: ovf: UDP 127.0.0.1:0 - no destination available ived NULL device Nov 1 07:56:23 syzkaller daemon.err dhcpcd[54[ 1547.620523][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 93]: libudev: received NULL device Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 sy[ 1547.669871][ T30] task:kworker/0:2 state:D stack:25120 pid:965 tgid:965 ppid:2 flags:0x00004000 zkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 syzkaller daemonNov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device[ 1547.696005][ T30] Workqueue: usb_hub_wq hub_event Nov 1 07:56:23 [ 1547.701642][ T30] Call Trace: syzkaller daemon[ 1547.705702][ T30] Nov 1 07:56:23 [ 1547.710483][ T30] context_switch kernel/sched/core.c:5328 [inline] Nov 1 07:56:23 [ 1547.710483][ T30] __schedule+0xe55/0x5730 kernel/sched/core.c:6690 syzkaller daemon[ 1547.715832][ T30] ? __pfx___lock_acquire+0x10/0x10 kernel/locking/lockdep.c:4387 .err dhcpcd[5493[ 1547.722466][ T30] ? __pfx___schedule+0x10/0x10 ]: libudev: rece[ 1547.728652][ T30] ? sched_submit_work kernel/sched/core.c:6748 [inline] ]: libudev: rece[ 1547.728652][ T30] ? schedule+0x298/0x350 kernel/sched/core.c:6781 ived NULL device[ 1547.734264][ T30] ? __pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5346 Nov 1 07:56:2[ 1547.740601][ T30] ? trace_lock_acquire+0x14a/0x1d0 include/trace/events/lock.h:24 3 syzkaller daem[ 1547.748396][ T30] ? lock_acquire+0x2f/0xb0 kernel/locking/lockdep.c:5796 on.err dhcpcd[54Nov 1 07:56:23 [ 1547.755620][ T30] ? sched_submit_work kernel/sched/core.c:6723 [inline] on.err dhcpcd[54Nov 1 07:56:23 [ 1547.755620][ T30] ? schedule+0x1fd/0x350 kernel/sched/core.c:6781 Nov 1 07:56:23 [ 1547.760099][ T30] __schedule_loop kernel/sched/core.c:6767 [inline] Nov 1 07:56:23 [ 1547.760099][ T30] schedule+0xe7/0x350 kernel/sched/core.c:6782 Nov 1 07:56:23 [ 1547.765727][ T30] usb_kill_urb.part.0+0x1ca/0x250 drivers/usb/core/urb.c:713 syzkaller daemonNov 1 07:56:23 [ 1547.773486][ T30] ? __pfx_usb_kill_urb.part.0+0x10/0x10 drivers/usb/core/urb.c:928 syzkaller daemon[ 1547.780441][ T30] ? __pfx_autoremove_wake_function+0x10/0x10 include/linux/list.h:183 .err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:2[ 1547.793233][ T30] ? __pfx___might_resched+0x10/0x10 kernel/sched/core.c:5828 Nov 1 07:56:23 Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493[ 1547.803193][ T30] usb_kill_urb+0x83/0xa0 drivers/usb/core/urb.c:702 Nov 1 07:56:23 [ 1547.808707][ T30] usb_start_wait_urb+0x255/0x4c0 drivers/usb/core/message.c:65 syzkaller daemon[ 1547.815107][ T30] ? __pfx_usb_start_wait_urb+0x10/0x10 drivers/usb/core/message.c:37 .err dhcpcd[5493[ 1547.821866][ T30] ? __asan_memset+0x23/0x50 mm/kasan/shadow.c:84 Nov 1 07:56:23 [ 1547.827704][ T30] usb_internal_control_msg drivers/usb/core/message.c:103 [inline] Nov 1 07:56:23 [ 1547.827704][ T30] usb_control_msg+0x327/0x4b0 drivers/usb/core/message.c:154 syzkaller daemon.err dhcpcd[5493[ 1547.835888][ T30] ? __pfx_usb_control_msg+0x10/0x10 drivers/usb/core/message.c:68 ]: libudev: rece[ 1547.841894][ T30] ? list_empty include/linux/list.h:373 [inline] ]: libudev: rece[ 1547.841894][ T30] ? usb_hcd_flush_endpoint+0x15d/0x3e0 drivers/usb/core/hcd.c:1802 ived NULL device[ 1547.848758][ T30] get_bMaxPacketSize0.constprop.0+0xa5/0x1c0 drivers/usb/core/hub.c:4805 Nov 1 07:56:23 [ 1547.856229][ T30] hub_port_init+0xcc3/0x3a40 drivers/usb/core/hub.c:5066 Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493[ 1547.865963][ T30] hub_port_connect drivers/usb/core/hub.c:5450 [inline] Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493[ 1547.865963][ T30] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493[ 1547.865963][ T30] port_event drivers/usb/core/hub.c:5821 [inline] Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493[ 1547.865963][ T30] hub_event+0x2b4f/0x4e10 drivers/usb/core/hub.c:5903 ]: libudev: receNov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: receNov 1 07:56:23 syzkaller daemon[ 1547.879130][ T30] ? __pfx_hub_event+0x10/0x10 drivers/usb/core/hub.c:4653 Nov 1 07:56:23 [ 1547.885811][ T30] ? __pfx_lock_acquire.part.0+0x10/0x10 kernel/locking/lockdep.c:122 syzkaller daemon[ 1547.892315][ T30] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] syzkaller daemon[ 1547.892315][ T30] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:737 .err dhcpcd[5493[ 1547.898486][ T30] ? trace_lock_acquire+0x14a/0x1d0 include/trace/events/lock.h:24 ]: libudev: rece[ 1547.905774][ T30] ? process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 ived NULL device[ 1547.912291][ T30] ? lock_acquire+0x2f/0xb0 kernel/locking/lockdep.c:5796 Nov 1 07:56:2[ 1547.917727][ T30] ? process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 3 syzkaller daem[ 1547.923733][ T30] process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 on.err dhcpcd[54[ 1547.929987][ T30] ? __pfx_hcd_resume_work+0x10/0x10 drivers/usb/core/hcd.c:2482 93]: libudev: reNov 1 07:56:23 Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device Nov 1 07:56:23 syzkaller da[ 1547.954696][ T30] ? __pfx_process_one_work+0x10/0x10 include/linux/list.h:153 emon.err dhcpcd[[ 1547.961403][ T30] ? assign_work+0x1a0/0x250 kernel/workqueue.c:1200 Nov 1 07:56:23 [ 1547.967449][ T30] process_scheduled_works kernel/workqueue.c:3310 [inline] Nov 1 07:56:23 [ 1547.967449][ T30] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 syzkaller daemon[ 1547.973410][ T30] ? __kthread_parkme+0x148/0x220 kernel/kthread.c:293 .err dhcpcd[5493[ 1547.979668][ T30] ? __pfx_worker_thread+0x10/0x10 include/linux/list.h:183 ]: libudev: rece[ 1547.986288][ T30] kthread+0x2c1/0x3a0 kernel/kthread.c:389 ived NULL device[ 1547.991597][ T30] ? __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] ived NULL device[ 1547.991597][ T30] ? _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 Nov 1 07:56:2[ 1547.998133][ T30] ? __pfx_kthread+0x10/0x10 include/linux/list.h:373 3 syzkaller daem[ 1548.005028][ T30] ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 on.err dhcpcd[54[ 1548.009848][ T30] ? __pfx_kthread+0x10/0x10 include/linux/list.h:373 93]: libudev: reNov 1 07:56:23 syzkaller daemon.err dhcpcd[5493[ 1548.021036][ T30] ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 ]: libudev: rece[ 1548.026197][ T30] ived NULL device[ 1548.030645][ T30] Nov 1 07:56:2[ 1548.040170][ T30] 1 lock held by khungtaskd/30: 3 syzkaller daem[ 1548.046442][ T30] #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] 3 syzkaller daem[ 1548.046442][ T30] #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] 3 syzkaller daem[ 1548.046442][ T30] #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720 on.err dhcpcd[5493]: libudev: re[ 1548.058592][ T30] 5 locks held by kworker/0:2/965: Nov 1 07:56:23 [ 1548.064808][ T30] #0: ffff888144aaa148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 syzkaller daemonNov 1 07:56:23 Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: receNov 1 07:56:23 syzkaller daemonNov 1 07:56:23 Nov 1 07:56:23 [ 1548.089821][ T30] #1: ffffc9000386fd80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 syzkaller daemon.err dhcpcd[5493[ 1548.104615][ T30] #2: ffff888029d86190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline] syzkaller daemon.err dhcpcd[5493[ 1548.104615][ T30] #2: ffff888029d86190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e10 drivers/usb/core/hub.c:5849 ]: libudev: rece[ 1548.113549][ T30] #3: ffff888029e1c510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3206 [inline] ]: libudev: rece[ 1548.113549][ T30] #3: ffff888029e1c510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5418 [inline] ]: libudev: rece[ 1548.113549][ T30] #3: ffff888029e1c510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] ]: libudev: rece[ 1548.113549][ T30] #3: ffff888029e1c510 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5821 [inline] ]: libudev: rece[ 1548.113549][ T30] #3: ffff888029e1c510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x27ec/0x4e10 drivers/usb/core/hub.c:5903 ived NULL device[ 1548.124872][ T30] #4: ffff8880299a7f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5419 [inline] ived NULL device[ 1548.124872][ T30] #4: ffff8880299a7f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline] ived NULL device[ 1548.124872][ T30] #4: ffff8880299a7f68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5821 [inline] ived NULL device[ 1548.124872][ T30] #4: ffff8880299a7f68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x2815/0x4e10 drivers/usb/core/hub.c:5903 Nov 1 07:56:2[ 1548.135922][ T30] 2 locks held by getty/5581: 3 syzkaller daem[ 1548.141815][ T30] #0: ffff88803222a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 on.err dhcpcd[5493]: libudev: re[ 1548.154297][ T30] #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 ceived NULL device Nov 1 07:56:23 syzkaller daemon.err dhcpcd[5493]: libudev: [ 1548.171716][ T30] 2 locks held by syz.6.6336/27000: received NULL de[ 1548.177755][ T30] 1 lock held by syz.6.6336/27001: vice Nov 1 07:[ 1548.184263][ T30] #0: ffff888025987398 (&mm->mmap_lock){++++}-{3:3}, at: mmap_read_lock_killable include/linux/mmap_lock.h:153 [inline] Nov 1 07:[ 1548.184263][ T30] #0: ffff888025987398 (&mm->mmap_lock){++++}-{3:3}, at: get_mmap_lock_carefully mm/memory.c:6123 [inline] Nov 1 07:[ 1548.184263][ T30] #0: ffff888025987398 (&mm->mmap_lock){++++}-{3:3}, at: lock_mm_and_find_vma+0x3a9/0x6a0 mm/memory.c:6174 56:23 syzkaller [ 1548.195603][ T30] daemon.err dhcpc[ 1548.199228][ T30] ============================================= Nov 1 07:56:23 [ 1548.209303][ T30] NMI backtrace for cpu 0 syzkaller daemon[ 1548.214679][ T30] CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00181-g6c52d4da1c74 #0 .err dhcpcd[5493[ 1548.226546][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ]: libudev: rece[ 1548.237959][ T30] Call Trace: ived NULL device[ 1548.242595][ T30] Nov 1 07:56:2[ 1548.246891][ T30] __dump_stack lib/dump_stack.c:94 [inline] Nov 1 07:56:2[ 1548.246891][ T30] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 3 syzkaller daem[ 1548.252918][ T30] nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 on.err dhcpcd[54[ 1548.259205][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10 Nov 1 07:56:23 [ 1548.266530][ T30] nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 syzkaller daemon[ 1548.273860][ T30] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] syzkaller daemon[ 1548.273860][ T30] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] syzkaller daemon[ 1548.273860][ T30] watchdog+0xf0c/0x1240 kernel/hung_task.c:379 .err dhcpcd[5493[ 1548.279455][ T30] ? __pfx_watchdog+0x10/0x10 kernel/hung_task.c:257 ]: libudev: rece[ 1548.285477][ T30] ? lockdep_hardirqs_on+0x7c/0x110 kernel/locking/lockdep.c:4468 ived NULL device[ 1548.292027][ T30] ? __kthread_parkme+0x148/0x220 kernel/kthread.c:293 Nov 1 07:56:2[ 1548.298402][ T30] ? __pfx_watchdog+0x10/0x10 kernel/hung_task.c:257 3 syzkaller daem[ 1548.304425][ T30] kthread+0x2c1/0x3a0 kernel/kthread.c:389 on.err dhcpcd[54[ 1548.309848][ T30] ? __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] on.err dhcpcd[54[ 1548.309848][ T30] ? _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202 93]: libudev: re[ 1548.316398][ T30] ? __pfx_kthread+0x10/0x10 include/linux/list.h:373 ceived NULL devi[ 1548.322336][ T30] ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 Nov 1 07:56:23 [ 1548.328095][ T30] ? __pfx_kthread+0x10/0x10 include/linux/list.h:373 Nov 1 07:56:23 [ 1548.334037][ T30] ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Nov 1 07:56:23 [ 1548.340170][ T30] syzkaller daemon[ 1548.344672][ T30] Sending NMI from CPU 0 to CPUs 1: .err dhcpcd[5493[ 1548.351119][ C1] NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 62 Comm: kworker/u8:4 Not tainted 6.12.0-rc5-syzkaller-00181-g6c52d4da1c74 #0 ]: libudev: rece[ 1548.351156][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 ived NULL device[ 1548.351170][ C1] Workqueue: writeback wb_workfn (flush-8:0) Nov 1 07:56:2[ 1548.351202][ C1] RIP: 0010:io_serial_out+0x8f/0xb0 drivers/tty/serial/8250/8250_port.c:413 3 syzkaller daem[ 1548.351234][ C1] Code: 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 1c 66 03 5d 40 44 89 e8 89 da ee <5b> 5d 41 5c 41 5d c3 cc cc cc cc e8 31 b2 e3 fc eb a0 e8 ba b2 e3 on.err dhcpcd[54[ 1548.351254][ C1] RSP: 0018:ffffc90000a18d50 EFLAGS: 00000002 Nov 1 07:56:23 [ 1548.351269][ C1] RAX: 0000000000000065 RBX: 00000000000003f8 RCX: 0000000000000000 syzkaller daemon[ 1548.351282][ C1] RDX: 00000000000003f8 RSI: ffffffff850b50a5 RDI: ffffffff9aaeac00 RBP: ffffffff9aaeabc0 R08: 0000000000000001 R09: 000000000000001f R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000065 R14: ffff888025460000 R15: ffff88814cb42000 FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f87cd108ab8 CR3: 000000000df7c000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: serial_out drivers/tty/serial/8250/8250.h:142 [inline] serial8250_tx_chars+0x334/0x860 drivers/tty/serial/8250/8250_port.c:1797 serial8250_handle_irq+0x74d/0xc80 drivers/tty/serial/8250/8250_port.c:1929 serial8250_default_handle_irq+0x9a/0x210 drivers/tty/serial/8250/8250_port.c:1949 serial8250_interrupt+0x103/0x210 drivers/tty/serial/8250/8250_core.c:86 __handle_irq_event_percpu+0x229/0x7c0 kernel/irq/handle.c:158 handle_irq_event_percpu kernel/irq/handle.c:193 [inline] handle_irq_event+0xab/0x1e0 kernel/irq/handle.c:210 handle_edge_irq+0x263/0xd10 kernel/irq/chip.c:831 generic_handle_irq_desc include/linux/irqdesc.h:173 [inline] handle_irq arch/x86/kernel/irq.c:247 [inline] call_irq_handler arch/x86/kernel/irq.c:259 [inline] __common_interrupt+0xdf/0x250 arch/x86/kernel/irq.c:285 common_interrupt+0xba/0xe0 arch/x86/kernel/irq.c:278 asm_common_interrupt+0x26/0x40 arch/x86/include/asm/idtentry.h:693 RIP: 0010:vma_pages include/linux/mm.h:3479 [inline] RIP: 0010:vma_last_pgoff mm/interval_tree.c:20 [inline] RIP: 0010:vma_interval_tree_iter_next+0x173/0x240 mm/interval_tree.c:23 Code: 39 64 24 08 72 a7 e8 dc f3 ba ff 48 8d 7b d0 48 b9 00 00 00 00 00 fc ff df 48 89 fe 48 c1 ee 03 80 3c 0e 00 0f 85 b7 00 00 00 <4c> 89 ff 48 8b 4b d0 48 be 00 00 00 00 00 fc ff df 48 c1 ef 03 80 RSP: 0018:ffffc900015c6d08 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff888027b92dc8 RCX: dffffc0000000000 RDX: ffff88801bb34880 RSI: 1ffff11004f725b3 RDI: ffff888027b92d98 RBP: ffff888027b92d90 R08: 0000000000000006 R09: 0000000000000029 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff8880340cf418 R15: ffff888027b92d90 rmap_walk_file+0x398/0x690 mm/rmap.c:2689 rmap_walk mm/rmap.c:2718 [inline] folio_mkclean+0x252/0x3f0 mm/rmap.c:1117 folio_clear_dirty_for_io+0x153/0x800 mm/page-writeback.c:3024 mpage_submit_folio+0x80/0x350 fs/ext4/inode.c:1902 mpage_process_page_bufs+0x46d/0x990 fs/ext4/inode.c:2034 mpage_prepare_extent_to_map+0x758/0x1470 fs/ext4/inode.c:2535 ext4_do_writepages+0x8df/0x2fe0 fs/ext4/inode.c:2677 ext4_writepages+0x303/0x730 fs/ext4/inode.c:2813 do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2683 __writeback_single_inode+0x166/0xfa0 fs/fs-writeback.c:1658 writeback_sb_inodes+0x603/0xfa0 fs/fs-writeback.c:1954 __writeback_inodes_wb+0xff/0x2e0 fs/fs-writeback.c:2025 wb_writeback+0x721/0xb50 fs/fs-writeback.c:2136 wb_check_old_data_flush fs/fs-writeback.c:2240 [inline] wb_do_writeback fs/fs-writeback.c:2293 [inline] wb_workfn+0x8c3/0xbc0 fs/fs-writeback.c:2321 process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229 process_scheduled_works kernel/workqueue.c:3310 [inline] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244