Nov 2 08:04:11 syzkalNov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[54Nov 2 08:04:11 Nov 2 08:04:11 Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04Nov 2 08:04:11 Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493Nov 2 08:04:11 Nov 2 08:04:11 syzkaller daemonNov 2 08:04:11 syzkaller daemon.err dhcpcd[5493Nov 2 08:04:11 syzkaller daemonNov 2 08:04:11 syzkaller daemon.err dhcpcd[5493Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL deviceNov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: rece[ 1136.921539][ T30] INFO: task kworker/1:2:969 blocked for more than 143 seconds.
Nov 2 08:04:11 Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493Nov 2 08:04:11 syzkaller daemonNov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daem[ 1136.930297][ T30] Not tainted 6.12.0-rc5-syzkaller-00299-g11066801dd4b #0
on.err dhcpcd[54[ 1136.930313][ T30] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
93]: libudev: re[ 1136.930321][ T30] task:kworker/1:2 state:D stack:24224 pid:969 tgid:969 ppid:2 flags:0x00004000
ceived NULL devi[ 1136.930383][ T30] Workqueue: usb_hub_wq hub_event
ce
Nov 2 08:04[ 1136.930415][ T30] Call Trace:
:11 syzkaller da[ 1136.930422][ T30]
emon.err dhcpcd[[ 1136.930434][ T30] context_switch kernel/sched/core.c:5328 [inline]
emon.err dhcpcd[[ 1136.930434][ T30] __schedule+0xe55/0x5730 kernel/sched/core.c:6690
5493]: libudev: [ 1136.930464][ T30] ? __pfx___lock_acquire+0x10/0x10 kernel/locking/lockdep.c:4387
received NULL de[ 1136.930497][ T30] ? __pfx___schedule+0x10/0x10
vice
Nov 2 08:[ 1136.930523][ T30] ? sched_submit_work kernel/sched/core.c:6748 [inline]
Nov 2 08:[ 1136.930523][ T30] ? schedule+0x298/0x350 kernel/sched/core.c:6781
04:11 syzkaller [ 1136.930547][ T30] ? __pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5346
daemon.err dhcpc[ 1136.930565][ T30] ? trace_lock_acquire+0x14a/0x1d0 include/trace/events/lock.h:24
d[5493]: libudev[ 1136.930594][ T30] ? lock_acquire+0x2f/0xb0 kernel/locking/lockdep.c:5796
: received NULL [ 1136.930612][ T30] ? sched_submit_work kernel/sched/core.c:6723 [inline]
: received NULL [ 1136.930612][ T30] ? schedule+0x1fd/0x350 kernel/sched/core.c:6781
device
Nov 2 0[ 1136.944555][ T30] __schedule_loop kernel/sched/core.c:6767 [inline]
Nov 2 0[ 1136.944555][ T30] schedule+0xe7/0x350 kernel/sched/core.c:6782
8:04:11 syzkalle[ 1136.944595][ T30] usb_kill_urb.part.0+0x1ca/0x250 drivers/usb/core/urb.c:713
r daemon.err dhc[ 1136.944625][ T30] ? __pfx_usb_kill_urb.part.0+0x10/0x10 drivers/usb/core/urb.c:928
pcd[5493]: libud[ 1136.944651][ T30] ? __pfx_autoremove_wake_function+0x10/0x10 include/linux/list.h:183
ev: received NUL[ 1136.944686][ T30] ? __pfx___might_resched+0x10/0x10 kernel/sched/core.c:5828
L device
Nov 2[ 1136.944717][ T30] usb_kill_urb+0x83/0xa0 drivers/usb/core/urb.c:702
08:04:11 syzkal[ 1136.944740][ T30] usb_start_wait_urb+0x255/0x4c0 drivers/usb/core/message.c:65
ler daemon.err d[ 1136.944769][ T30] ? __pfx_usb_start_wait_urb+0x10/0x10 drivers/usb/core/message.c:37
hcpcd[5493]: lib[ 1136.944805][ T30] ? __asan_memset+0x23/0x50 mm/kasan/shadow.c:84
udev: received N[ 1136.944833][ T30] usb_internal_control_msg drivers/usb/core/message.c:103 [inline]
udev: received N[ 1136.944833][ T30] usb_control_msg+0x327/0x4b0 drivers/usb/core/message.c:154
ULL device
Nov [ 1136.944862][ T30] ? __pfx_usb_control_msg+0x10/0x10 drivers/usb/core/message.c:68
2 08:04:11 syzk[ 1136.944891][ T30] ? list_empty include/linux/list.h:373 [inline]
2 08:04:11 syzk[ 1136.944891][ T30] ? usb_hcd_flush_endpoint+0x15d/0x3e0 drivers/usb/core/hcd.c:1802
aller daemon.err[ 1136.944920][ T30] get_bMaxPacketSize0.constprop.0+0xa5/0x1c0 drivers/usb/core/hub.c:4805
dhcpcd[5493]: l[ 1136.944953][ T30] hub_port_init+0xcc3/0x3a40 drivers/usb/core/hub.c:5066
ibudev: received[ 1136.944991][ T30] hub_port_connect drivers/usb/core/hub.c:5450 [inline]
ibudev: received[ 1136.944991][ T30] hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
ibudev: received[ 1136.944991][ T30] port_event drivers/usb/core/hub.c:5821 [inline]
ibudev: received[ 1136.944991][ T30] hub_event+0x2b4f/0x4e10 drivers/usb/core/hub.c:5903
NULL device
No[ 1136.945045][ T30] ? __pfx_hub_event+0x10/0x10 drivers/usb/core/hub.c:4653
v 2 08:04:11 sy[ 1136.945082][ T30] ? __pfx_lock_acquire.part.0+0x10/0x10 kernel/locking/lockdep.c:122
zkaller daemon.e[ 1136.945105][ T30] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
zkaller daemon.e[ 1136.945105][ T30] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:737
rr dhcpcd[5493]:[ 1136.945132][ T30] ? trace_lock_acquire+0x14a/0x1d0 include/trace/events/lock.h:24
libudev: receiv[ 1136.945160][ T30] ? process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
ed NULL device
Nov 2 08:04:11 [ 1136.945204][ T30] ? process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
syzkaller daemon[ 1136.945230][ T30] process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3229
.err dhcpcd[5493[ 1136.945262][ T30] ? __pfx_hcd_resume_work+0x10/0x10 drivers/usb/core/hcd.c:2482
]: libudev: rece[ 1136.945294][ T30] ? __pfx_process_one_work+0x10/0x10 include/linux/list.h:153
ived NULL device[ 1136.945324][ T30] ? assign_work+0x1a0/0x250 kernel/workqueue.c:1200
Nov 2 08:04:1[ 1136.945357][ T30] process_scheduled_works kernel/workqueue.c:3310 [inline]
Nov 2 08:04:1[ 1136.945357][ T30] worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
1 syzkaller daem[ 1136.945487][ T30] ? __kthread_parkme+0x148/0x220 kernel/kthread.c:293
on.err dhcpcd[54[ 1136.945513][ T30] ? __pfx_worker_thread+0x10/0x10 include/linux/list.h:183
93]: libudev: re[ 1136.945534][ T30] kthread+0x2c1/0x3a0 kernel/kthread.c:389
ceived NULL devi[ 1136.945556][ T30] ? __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
ceived NULL devi[ 1136.945556][ T30] ? _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
ce
Nov 2 08:04[ 1136.945581][ T30] ? __pfx_kthread+0x10/0x10 include/linux/list.h:373
:11 syzkaller da[ 1136.945606][ T30] ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
emon.err dhcpcd[[ 1136.945625][ T30] ? __pfx_kthread+0x10/0x10 include/linux/list.h:373
5493]: libudev: [ 1136.945650][ T30] ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
received NULL de[ 1136.945693][ T30]
vice
Nov 2 08:[ 1136.951173][ T30]
04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libNov 2 08:04:11 Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcNov 2 08:04:11 Nov 2 08:04:11 Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[54Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL deviNov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:11 syzkaller daemNov 2 08:04:11 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daem[ 1137.433265][ T29] kauditd_printk_skb: 3423 callbacks suppressed
on.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daNov 2 08:04:12 Nov 2 08:04:12 [ 1137.470318][ T5493] audit: audit_backlog=65 > audit_backlog_limit=64
Nov 2 08:04:12 [ 1137.477709][ T30] 1 lock held by khungtaskd/30:
syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daem[ 1137.491055][ T5181] audit: audit_backlog=65 > audit_backlog_limit=64
on.err dhcpcd[54[ 1137.498600][ T5181] audit: audit_lost=8544 audit_rate_limit=0 audit_backlog_limit=64
93]: libudev: received NULL device
Nov 2 08:04:12 syzkaller da[ 1137.512315][ T30] #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
Nov 2 08:04:12 syzkaller da[ 1137.512315][ T30] #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
Nov 2 08:04:12 syzkaller da[ 1137.512315][ T30] #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
emon.err dhcpcd[[ 1137.524099][ T5493] audit: audit_lost=8545 audit_rate_limit=0 audit_backlog_limit=64
5493]: libudev: received NULL de[ 1137.535225][ T5493] audit: backlog limit exceeded
vice
Nov 2 08:[ 1137.540587][ T5493] audit: audit_backlog=65 > audit_backlog_limit=64
04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL [ 1137.553384][ T30] 5 locks held by kworker/1:2/969:
device
Nov 2 0[ 1137.558602][ T30] #0: ffff88814468a548 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
8:04:12 syzkalle[ 1137.571061][ T5181] audit: backlog limit exceeded
r daemon.err dhc[ 1137.578199][ T53] IPVS: ovf: UDP 127.0.0.1:0 - no destination available
pcd[5493]: libudev: received NUL[ 1137.586863][ T4264] IPVS: ovf: UDP 127.0.0.1:0 - no destination available
Nov 2 08:04:12 [ 1137.595993][ T5181] audit: audit_backlog=65 > audit_backlog_limit=64
syzkaller daemon[ 1137.604076][T17954] vhci_hcd: connection reset by peer
.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: reNov 2 08:04:12 [ 1137.628610][ T30] #1: ffffc90003af7d80 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04[ 1137.654878][ T53] vhci_hcd: stop threads
:12 syzkaller da[ 1137.656421][ T30] #2:
emon.err dhcpcd[[ 1137.660300][ T53] vhci_hcd: release socket
5493]: libudev: [ 1137.664648][ T30] ffff888145ffa190 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1014 [inline]
5493]: libudev: [ 1137.664648][ T30] ffff888145ffa190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4e10 drivers/usb/core/hub.c:5849
received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NUL[ 1137.694598][ T969] usb 36-1: device descriptor read/8, error -110
L device
Nov 2 08:04:12 syzkal[ 1137.697094][ T30] #3:
Nov 2 08:04:12 [ 1137.703733][ T53] vhci_hcd: disconnect device
syzkaller daemon.err dhcpcd[5493Nov 2 08:04:12 Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: rece[ 1137.722773][ T30] ffff888145ffd510 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3206 [inline]
syzkaller daemon.err dhcpcd[5493Nov 2 08:04:12 Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: rece[ 1137.722773][ T30] ffff888145ffd510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5418 [inline]
syzkaller daemon.err dhcpcd[5493Nov 2 08:04:12 Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: rece[ 1137.722773][ T30] ffff888145ffd510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
syzkaller daemon.err dhcpcd[5493Nov 2 08:04:12 Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: rece[ 1137.722773][ T30] ffff888145ffd510 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5821 [inline]
syzkaller daemon.err dhcpcd[5493Nov 2 08:04:12 Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: rece[ 1137.722773][ T30] ffff888145ffd510 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x27ec/0x4e10 drivers/usb/core/hub.c:5903
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2[ 1137.768125][ T30] #4: ffff888029d31668 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5419 [inline]
Nov 2[ 1137.768125][ T30] #4: ffff888029d31668 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5661 [inline]
Nov 2[ 1137.768125][ T30] #4: ffff888029d31668 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5821 [inline]
Nov 2[ 1137.768125][ T30] #4: ffff888029d31668 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x2815/0x4e10 drivers/usb/core/hub.c:5903
08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received[ 1137.790771][ T30] 2 locks held by syslogd/5181:
NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daem[ 1137.812949][ T30] 2 locks held by getty/5578:
on.err dhcpcd[54[ 1137.818743][ T30] #0: ffff88803734a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
93]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller auth.info sshd[5809]: Received disconnect from 10.128.0.169 port 42842:11: disconnected by use[ 1137.860913][ T30] #1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
r
Nov 2 08:04:12 syzkaller kern.err kernel: [ 1136.921539][ T30] INFO: task kworker/1:2:969 blocked for more than 143 seconds.
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL de[ 1137.888611][ T30] 1 lock held by syz.0.1840/11532:
vice
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev[ 1137.899044][ T30] #0: ffffffff8e1c3c38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
: received NULL device
Nov 2 08:04:12 syzkaller kern.err kernel: [ 1136.930297][ T30] [ 1137.916739][ T30] 1 lock held by syz.4.2092/12289:
Not tainted 6.12.0-rc5-syzkaller[ 1137.924521][ T30] #0: ffffffff8e1c3c38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
-00299-g11066801[ 1137.937221][ T30] 1 lock held by syz.3.2627/13910:
dd4b #0
Nov 2 08:04:12 syzkaller kern.err kernel: [ 1136.930313][ T30] "echo[ 1137.949016][ T30] #0: ffffffff8fee34a8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:698 [inline]
Nov 2 08:04:12 syzkaller kern.err kernel: [ 1136.930313][ T30] "echo[ 1137.949016][ T30] #0: ffffffff8fee34a8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x38/0x230 drivers/net/tun.c:3517
0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Nov 2 08:04:12 syzkaller kern.info kernel: [ 1136.930321][ 1137.967978][ T30] 2 locks held by kworker/1:0/17981:
[ T30] task:kw[ 1137.975601][ T30] #0: ffff88801b078948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204
orker/1:2 state:D stack:24224 pid:969 tgid:969 ppid:2 [ 1137.991461][ T30] #1: ffffc90002f8fd80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
flags:0x00004000
Nov 2 08:0Nov 2 08:04:12 Nov 2 08:04:12 syzkaller auth.info sshd[5809]: Disconnected from user root 10.1[ 1138.011865][ T30] 1 lock held by syz.1.6712/24280:
28.0.169 port 42842
Nov 2 08:0Nov 2 08:04:12 syzkaller kern.info kernel: [ 1136.930612][ T3Nov 2 08:04:12 Nov 2 08:04:12 syzkaller kern.iNov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 syzkaller kern.info kernel: [ 1136.944833][ T3Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 syzkaller daemonNov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 syzkaller kern.info kernel: [ 11Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 syzkaller kern.iNov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 [ 1138.085641][ T30]
Nov 2 08:04:12 Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: reNov 2 08:04:12 Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[54Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NULL device
Nov 2 08:04:12 syzkaller daemon.err dhcpcd[5493]: libudev: received NNov 2 08:04:12 Nov 2 08:04:12 syzkaller kern.warn kernel: [ 1137.477709][ T30] 1 lock held by khungtaskd/30:
Nov 2 08:04:1Nov 2 08:04:12 Nov 2 08:04:12 Nov 2 08:04:12 syzkaller kern.e[ 1138.188817][ T30] NMI backtrace for cpu 0
Nov 2 08:04:12 [ 1138.193214][ T30] CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00299-g11066801dd4b #0
Nov 2 08:04:12 [ 1138.205076][ T30] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Nov 2 08:04:12 [ 1138.216498][ T30] Call Trace:
syzkaller daemon[ 1138.221155][ T30]
Nov 2 08:04:12 [ 1138.225457][ T30] __dump_stack lib/dump_stack.c:94 [inline]
Nov 2 08:04:12 [ 1138.225457][ T30] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
Nov 2 08:04:12 [ 1138.231499][ T30] nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
syzkaller daemon[ 1138.237799][ T30] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10
.err dhcpcd[5493[ 1138.245163][ T30] nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
]: libudev: rece[ 1138.252524][ T30] trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
]: libudev: rece[ 1138.252524][ T30] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
]: libudev: rece[ 1138.252524][ T30] watchdog+0xf0c/0x1240 kernel/hung_task.c:379
ived NULL device[ 1138.258128][ T30] ? __pfx_watchdog+0x10/0x10 kernel/hung_task.c:257
Nov 2 08:04:1[ 1138.264161][ T30] ? lockdep_hardirqs_on+0x7c/0x110 kernel/locking/lockdep.c:4468
2 syzkaller daem[ 1138.270728][ T30] ? __kthread_parkme+0x148/0x220 kernel/kthread.c:293
on.err dhcpcd[54[ 1138.277113][ T30] ? __pfx_watchdog+0x10/0x10 kernel/hung_task.c:257
93]: libudev: re[ 1138.283155][ T30] kthread+0x2c1/0x3a0 kernel/kthread.c:389
ceived NULL devi[ 1138.288610][ T30] ? __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline]
ceived NULL devi[ 1138.288610][ T30] ? _raw_spin_unlock_irq+0x23/0x50 kernel/locking/spinlock.c:202
ce
Nov 2 08:04[ 1138.295175][ T30] ? __pfx_kthread+0x10/0x10 include/linux/list.h:373
:12 syzkaller da[ 1138.301137][ T30] ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
Nov 2 08:04:12 [ 1138.306920][ T30] ? __pfx_kthread+0x10/0x10 include/linux/list.h:373
Nov 2 08:04:12 [ 1138.312889][ T30] ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Nov 2 08:04:12 [ 1138.319044][ T30]
Nov 2 08:04:12 [ 1138.324100][ T30] Sending NMI from CPU 0 to CPUs 1:
syzkaller daemon[ 1138.330009][ C1] NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.0-rc5-syzkaller-00299-g11066801dd4b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:native_apic_msr_eoi+0xf/0x20 arch/x86/include/asm/apic.h:218
Code: 01 00 00 00 c3 cc cc cc cc 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 31 c0 b9 0b 08 00 00 89 c2 0f 30 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90
RSP: 0018:ffffc90000a18f60 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88801b083800 RCX: 000000000000080b
RDX: 0000000000000000 RSI: ffffffff816fa87e RDI: ffff88801bef3310
RBP: ffff88801b08387c R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 1ffff1100361070f
R13: dffffc0000000000 R14: ffff88801b083838 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000202bf030 CR3: 0000000034d9e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
handle_edge_irq+0x1fe/0xd10 kernel/irq/chip.c:812
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:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:92 [inline]
RIP: 0010:acpi_safe_halt+0x1a/0x20 drivers/acpi/processor_idle.c:112
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 65 48 8b 05 a8 6a e0 74 48 8b 00 a8 08 75 0c 66 90 0f 00 2d 78 cf b9 00 fb f4 c3 cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc900001a7d58 EFLAGS: 00000246
RAX: 0000000000004000 RBX: 0000000000000001 RCX: ffffffff8b235449
RDX: 0000000000000001 RSI: ffff888144284800 RDI: ffff888144284864
RBP: ffff888144284864 R08: 0000000000000001 R09: ffffed10170e7025
R10: ffff8880b873812b R11: 0000000000000000 R12: ffff88814568c800
R13: ffffffff8ee12280 R14: 0000000000000001 R15: 0000000000000000
acpi_idle_enter+0xc5/0x160 drivers/acpi/processor_idle.c:702
cpuidle_enter_state+0xaa/0x4f0 drivers/cpuidle/cpuidle.c:264
cpuidle_enter+0x4e/0xa0 drivers/cpuidle/cpuidle.c:385
cpuidle_idle_call kernel/sched/idle.c:230 [inline]
do_idle+0x313/0x3f0 kernel/sched/idle.c:326
cpu_startup_entry+0x4f/0x60 kernel/sched/idle.c:424
start_secondary+0x222/0x2b0 arch/x86/kernel/smpboot.c:314
common_startup_64+0x13e/0x148
.err dhcpcd[5493]: libudev: received NULL device