Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:27 syzkaller daemon.err d[ 414.013428][ T31] INFO: task kworker/0:0:9 blocked for more than 143 seconds.
hcpcd[5491]: libudev: received NULL device
Apr 6 03:59:27 syzkaller daemon.errApr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemonApr 6 03:59:27 [ 414.068147][ T31] Not tainted 6.14.0-syzkaller-13524-gf4d2ef48250a #0
syzkaller daemon.err dhcpcd[5491Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:27 syzkaller daemon.err dhcpcd[54Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:27 syzkaller daemon.err dhcpcd[54[ 414.105846][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemonApr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemonApr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemonApr 6 03:59:27 syzkaller daemon.err dhcpcd[5491Apr 6 03:59:27 [ 414.157331][ T31] task:kworker/0:0 state:D stack:22584 pid:9 tgid:9 ppid:2 task_flags:0x4208060 flags:0x00004000
Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemonApr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemonApr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deviceApr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:27 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 syzkaller daemonApr 6 03:59:28 syzkaller daemonApr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 [ 414.254814][ T31] Workqueue: usb_hub_wq hub_event
Apr 6 03:59:28 [ 414.259871][ T31] Call Trace:
Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 syzkaller daemonApr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 [ 414.284285][ T31] <TASK>
Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daem[ 414.303808][ T31] context_switch kernel/sched/core.c:5382 [inline]
Apr 6 03:59:28 syzkaller daem[ 414.303808][ T31] __schedule+0x116f/0x5de0 kernel/sched/core.c:6767
on.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkalle[ 414.328876][ T31] ? mark_usage kernel/locking/lockdep.c:4643 [inline]
Apr 6 03:59:28 syzkalle[ 414.328876][ T31] ? __lock_acquire+0x9c1/0x1ba0 kernel/locking/lockdep.c:5189
r daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller kern.err kernel: [ 414.013428][ T31] INFO: task kworker/0:0:9 blocked for[ 414.405648][ T31] ? __pfx___schedule+0x10/0x10 usercopy_64.c:-1
more than 143 seconds.
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller kern.err ke[ 414.422666][ T31] ? find_held_lock+0x2b/0x80 kernel/locking/lockdep.c:5348
rnel: [ 414.068147][ T31] Not tainted 6.14.0-syzkaller-13524-gf4d2ef48250a #0
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daem[ 414.472885][ T31] ? sched_submit_work kernel/sched/core.c:6826 [inline]
Apr 6 03:59:28 syzkaller daem[ 414.472885][ T31] ? schedule+0x2d7/0x3a0 kernel/sched/core.c:6859
on.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: [ 414.487995][ T31] __schedule_loop kernel/sched/core.c:6845 [inline]
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: [ 414.487995][ T31] schedule+0xe7/0x3a0 kernel/sched/core.c:6860
received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev[ 414.498402][ T31] usb_kill_urb drivers/usb/core/urb.c:713 [inline]
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev[ 414.498402][ T31] usb_kill_urb+0x253/0x320 drivers/usb/core/urb.c:699
: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6[ 414.512268][ T31] ? __pfx_usb_kill_urb+0x10/0x10 drivers/usb/core/urb.c:928
03:59:28 syzkal[ 414.518804][ T31] ? __pfx_autoremove_wake_function+0x10/0x10 include/linux/list.h:196
ler daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzk[ 414.531512][ T31] usb_start_wait_urb+0x250/0x4b0 drivers/usb/core/message.c:65
aller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller kern.err kernel: [ 414.105846][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
A[ 414.538237][ T31] ? __pfx_usb_start_wait_urb+0x10/0x10 drivers/usb/core/message.c:37
pr 6 03:59:28 s[ 414.538282][ T31] ? __asan_memset+0x23/0x50 mm/kasan/shadow.c:84
yzkaller daemon.[ 414.538318][ T31] usb_internal_control_msg drivers/usb/core/message.c:103 [inline]
yzkaller daemon.[ 414.538318][ T31] usb_control_msg+0x326/0x4a0 drivers/usb/core/message.c:154
err dhcpcd[5491][ 414.538345][ T31] ? __pfx_usb_control_msg+0x10/0x10 drivers/usb/core/message.c:68
: libudev: recei[ 414.538381][ T31] get_bMaxPacketSize0.constprop.0+0xd0/0x1f0 drivers/usb/core/hub.c:4815
ved NULL deviceA[ 414.538413][ T31] hub_port_init+0x690/0x3a70 drivers/usb/core/hub.c:5011
pr 6 03:59:28 s[ 414.538452][ T31] hub_port_connect drivers/usb/core/hub.c:5460 [inline]
pr 6 03:59:28 s[ 414.538452][ T31] hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
pr 6 03:59:28 s[ 414.538452][ T31] port_event drivers/usb/core/hub.c:5831 [inline]
pr 6 03:59:28 s[ 414.538452][ T31] hub_event+0x2c67/0x4fa0 drivers/usb/core/hub.c:5913
yzkaller daemon.[ 414.538497][ T31] ? __pfx_hub_event+0x10/0x10 drivers/usb/core/hub.c:4666
Apr 6 03:59:28 [ 414.538514][ T31] ? debug_object_deactivate+0x1ec/0x3a0 lib/debugobjects.c:888
syzkaller daemon[ 414.538554][ T31] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
syzkaller daemon[ 414.538554][ T31] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:736
.err dhcpcd[5491[ 414.538583][ T31] process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
]: libudev: rece[ 414.538615][ T31] ? __pfx_hcd_resume_work+0x10/0x10 drivers/usb/core/hcd.c:2482
ived NULL device[ 414.538636][ T31] ? __pfx_process_one_work+0x10/0x10 arch/x86/include/asm/bitops.h:206
Apr 6 03:59:2[ 414.538673][ T31] ? assign_work+0x1a0/0x250 kernel/workqueue.c:1200
8 syzkaller daem[ 414.538696][ T31] process_scheduled_works kernel/workqueue.c:3319 [inline]
8 syzkaller daem[ 414.538696][ T31] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
Apr 6 03:59:28 [ 414.538731][ T31] ? __pfx_worker_thread+0x10/0x10 include/linux/list.h:183
syzkaller daemon[ 414.538753][ T31] kthread+0x3c2/0x780 kernel/kthread.c:464
Apr 6 03:59:28 [ 414.538774][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
Apr 6 03:59:28 [ 414.538888][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
syzkaller daemon[ 414.538907][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
Apr 6 03:59:28 [ 414.538926][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
Apr 6 03:59:28 [ 414.538964][ T31] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
Apr 6 03:59:28 [ 414.538964][ T31] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:736
syzkaller daemon[ 414.538988][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
.err dhcpcd[5491[ 414.539008][ T31] ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
]: libudev: rece[ 414.539031][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
ived NULL device[ 414.539050][ T31] ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Apr 6 03:59:2[ 414.539093][ T31] </TASK>
8 syzkaller daem[ 414.566338][ T31] INFO: task kworker/0:5:5906 blocked for more than 143 seconds.
on.err dhcpcd[54[ 414.566366][ T31] Not tainted 6.14.0-syzkaller-13524-gf4d2ef48250a #0
91]: libudev: re[ 414.566378][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
ceived NULL devi[ 414.566386][ T31] task:kworker/0:5 state:D stack:26264 pid:5906 tgid:5906 ppid:2 task_flags:0x4208060 flags:0x00004000
ce
Apr 6 03:59[ 414.566446][ T31] Workqueue: usb_hub_wq hub_event
:28 syzkaller ke[ 414.569403][ T31] Call Trace:
rn.info kernel: [ 414.157331][ T31] task:kworker/0:0 state:D stack:22584 pid:9 tgid:9 ppid:2 task_flags:0x4208060 flags:0x00004000
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NApr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 0[ 414.844443][ T31] <TASK>
Apr 6 03:59:28 [ 414.848241][ T31] context_switch kernel/sched/core.c:5382 [inline]
Apr 6 03:59:28 [ 414.848241][ T31] __schedule+0x116f/0x5de0 kernel/sched/core.c:6767
Apr 6 03:59:28 [ 414.848277][ T31] ? mark_usage kernel/locking/lockdep.c:4643 [inline]
Apr 6 03:59:28 [ 414.848277][ T31] ? __lock_acquire+0x9c1/0x1ba0 kernel/locking/lockdep.c:5189
Apr 6 03:59:28 Apr 6 03:59:28 syzkaller daemonApr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 syzkaller kern.iApr 6 03:59:28 Apr 6 03:59:28 syzkaller daemonApr 6 03:59:28 Apr 6 03:59:28 [ 414.876440][ T31] ? __pfx___schedule+0x10/0x10 usercopy_64.c:-1
Apr 6 03:59:28 [ 414.881971][ T31] ? find_held_lock+0x2b/0x80 kernel/locking/lockdep.c:5348
syzkaller daemon[ 414.882000][ T31] ? sched_submit_work kernel/sched/core.c:6826 [inline]
syzkaller daemon[ 414.882000][ T31] ? schedule+0x2d7/0x3a0 kernel/sched/core.c:6859
.err dhcpcd[5491[ 414.882025][ T31] __schedule_loop kernel/sched/core.c:6845 [inline]
.err dhcpcd[5491[ 414.882025][ T31] schedule+0xe7/0x3a0 kernel/sched/core.c:6860
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491[ 414.902787][ T31] usb_kill_urb drivers/usb/core/urb.c:713 [inline]
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491[ 414.902787][ T31] usb_kill_urb+0x253/0x320 drivers/usb/core/urb.c:699
]: libudev: received NULL device[ 414.909816][ T31] ? __pfx_usb_kill_urb+0x10/0x10 drivers/usb/core/urb.c:928
Apr 6 03:59:28 [ 414.915800][ T31] ? __pfx_autoremove_wake_function+0x10/0x10 include/linux/list.h:196
syzkaller daemon[ 414.923269][ T31] usb_start_wait_urb+0x250/0x4b0 drivers/usb/core/message.c:65
Apr 6 03:59:28 [ 414.929573][ T31] ? __pfx_usb_start_wait_urb+0x10/0x10 drivers/usb/core/message.c:37
Apr 6 03:59:28 [ 414.936473][ T31] ? __asan_memset+0x23/0x50 mm/kasan/shadow.c:84
Apr 6 03:59:28 [ 414.942632][ T31] usb_internal_control_msg drivers/usb/core/message.c:103 [inline]
Apr 6 03:59:28 [ 414.942632][ T31] usb_control_msg+0x326/0x4a0 drivers/usb/core/message.c:154
Apr 6 03:59:28 [ 414.948583][ T31] ? __pfx_usb_control_msg+0x10/0x10 drivers/usb/core/message.c:68
Apr 6 03:59:28 [ 414.955298][ T31] get_bMaxPacketSize0.constprop.0+0xd0/0x1f0 drivers/usb/core/hub.c:4815
syzkaller kern.i[ 414.962779][ T31] hub_port_init+0x690/0x3a70 drivers/usb/core/hub.c:5011
nfo kernel: [ 4[ 414.968777][ T31] hub_port_connect drivers/usb/core/hub.c:5460 [inline]
nfo kernel: [ 4[ 414.968777][ T31] hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
nfo kernel: [ 4[ 414.968777][ T31] port_event drivers/usb/core/hub.c:5831 [inline]
nfo kernel: [ 4[ 414.968777][ T31] hub_event+0x2c67/0x4fa0 drivers/usb/core/hub.c:5913
14.284285][ T3[ 414.974623][ T31] ? __pfx_hub_event+0x10/0x10 drivers/usb/core/hub.c:4666
1] <TASK>
Apr [ 414.980770][ T31] ? debug_object_deactivate+0x1ec/0x3a0 lib/debugobjects.c:888
6 03:59:28 syzk[ 414.987850][ T31] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
6 03:59:28 syzk[ 414.987850][ T31] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:736
aller daemon.err[ 414.993923][ T31] process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238
dhcpcd[5491]: l[ 415.000211][ T31] ? __pfx_hub_event+0x10/0x10 drivers/usb/core/hub.c:4666
ibudev: received[ 415.006522][ T31] ? __pfx_process_one_work+0x10/0x10 arch/x86/include/asm/bitops.h:206
Apr 6 03:59:28 [ 415.013337][ T31] ? assign_work+0x1a0/0x250 kernel/workqueue.c:1200
Apr 6 03:59:28 [ 415.019172][ T31] process_scheduled_works kernel/workqueue.c:3319 [inline]
Apr 6 03:59:28 [ 415.019172][ T31] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
syzkaller daemon[ 415.025191][ T31] ? get_current arch/x86/include/asm/current.h:25 [inline]
syzkaller daemon[ 415.025191][ T31] ? __kthread_parkme+0x19e/0x250 kernel/kthread.c:304
.err dhcpcd[5491[ 415.031558][ T31] ? __pfx_worker_thread+0x10/0x10 include/linux/list.h:183
]: libudev: rece[ 415.038127][ T31] kthread+0x3c2/0x780 kernel/kthread.c:464
Apr 6 03:59:28 [ 415.043664][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
Apr 6 03:59:28 [ 415.049513][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
Apr 6 03:59:28 [ 415.049537][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
Apr 6 03:59:28 [ 415.049552][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
syzkaller daemon[ 415.049568][ T31] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline]
syzkaller daemon[ 415.049568][ T31] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:736
.err dhcpcd[5491[ 415.049590][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
]: libudev: rece[ 415.049606][ T31] ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:153
ived NULL device[ 415.049625][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206
Apr 6 03:59:2[ 415.091511][ T31] ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
8 syzkaller daem[ 415.097579][ T31] </TASK>
on.err dhcpcd[54[ 415.102043][ T31]
91]: libudev: re[ 415.111241][ T31] 5 locks held by kworker/0:0/9:
ceived NULL devi[ 415.117477][ T31] #0: ffff888021adb148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
ce
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpc[ 415.139252][ T31] #1: ffffc900000e7d18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
d[5491]: libudev[ 415.151903][ T31] #2: ffff88802a541198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
d[5491]: libudev[ 415.151903][ T31] #2: ffff88802a541198 (&dev->mutex){....}-{4:4}, at: hub_event+0x1c0/0x4fa0 drivers/usb/core/hub.c:5859
: received NULL [ 415.162097][ T31] #3: ffff88802a544510 (&port_dev->status_lock){+.+.}-{4:4}, at: usb_lock_port drivers/usb/core/hub.c:3220 [inline]
: received NULL [ 415.162097][ T31] #3: ffff88802a544510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5428 [inline]
: received NULL [ 415.162097][ T31] #3: ffff88802a544510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
: received NULL [ 415.162097][ T31] #3: ffff88802a544510 (&port_dev->status_lock){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5831 [inline]
: received NULL [ 415.162097][ T31] #3: ffff88802a544510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x2906/0x4fa0 drivers/usb/core/hub.c:5913
device
Apr 6 0[ 415.173400][ T31] #4: ffff88802968af68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5429 [inline]
Apr 6 0[ 415.173400][ T31] #4: ffff88802968af68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
Apr 6 0[ 415.173400][ T31] #4: ffff88802968af68 (hcd->address0_mutex){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5831 [inline]
Apr 6 0[ 415.173400][ T31] #4: ffff88802968af68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x292b/0x4fa0 drivers/usb/core/hub.c:5913
3:59:28 syzkalle[ 415.184494][ T31] 1 lock held by khungtaskd/31:
r daemon.err dhc[ 415.190601][ T31] #0: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
r daemon.err dhc[ 415.190601][ T31] #0: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
r daemon.err dhc[ 415.190601][ T31] #0: ffffffff8e3c1580 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6764
pcd[5491]: libud[ 415.201882][ T31] 5 locks held by kworker/1:1/59:
ev: received NUL[ 415.208244][ T31] #0: ffff888021adb148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
L device
Apr 6[ 415.208299][ T31] #1: ffffc9000125fd18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
03:59:28 syzkal[ 415.233167][ T31] #2: ffff88802a3cf198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
03:59:28 syzkal[ 415.233167][ T31] #2: ffff88802a3cf198 (&dev->mutex){....}-{4:4}, at: hub_event+0x1c0/0x4fa0 drivers/usb/core/hub.c:5859
ler daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[54[ 415.282979][ T31] #4: ffff8880294d0f68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5429 [inline]
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[54[ 415.282979][ T31] #4: ffff8880294d0f68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[54[ 415.282979][ T31] #4: ffff8880294d0f68 (hcd->address0_mutex){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5831 [inline]
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[54[ 415.282979][ T31] #4: ffff8880294d0f68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x292b/0x4fa0 drivers/usb/core/hub.c:5913
91]: libudev: received NULL devi[ 415.295377][ T31] 1 lock held by syslogd/5179:
ce
Apr 6 03:59[ 415.300921][ T31] #0: ffffffff8f0a51c8 (tty_mutex){+.+.}-{4:4}, at: tty_open_by_driver drivers/tty/tty_io.c:2046 [inline]
Apr 6 03:59[ 415.300921][ T31] #0: ffffffff8f0a51c8 (tty_mutex){+.+.}-{4:4}, at: tty_open+0x53e/0xf90 drivers/tty/tty_io.c:2129
:28 syzkaller da[ 415.300991][ T31] 2 locks held by getty/5574:
Apr 6 03:59:28 [ 415.316943][ T31] #0: ffff88814eb380a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
Apr 6 03:59:28 [ 415.328021][ T31] #1: ffffc9000334b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
syzkaller daemon[ 415.339559][ T31] 5 locks held by kworker/0:3/5873:
.err dhcpcd[5491[ 415.346162][ T31] #0: ffff888021adb148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
]: libudev: rece[ 415.358497][ T31] #1: ffffc900040dfd18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
ived NULL device[ 415.371135][ T31] #2: ffff88802a498198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
ived NULL device[ 415.371135][ T31] #2: ffff88802a498198 (&dev->mutex){....}-{4:4}, at: hub_event+0x1c0/0x4fa0 drivers/usb/core/hub.c:5859
Apr 6 03:59:2[ 415.381185][ T31] #3: ffff88802a49b510 (&port_dev->status_lock){+.+.}-{4:4}, at: usb_lock_port drivers/usb/core/hub.c:3220 [inline]
Apr 6 03:59:2[ 415.381185][ T31] #3: ffff88802a49b510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5428 [inline]
Apr 6 03:59:2[ 415.381185][ T31] #3: ffff88802a49b510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
Apr 6 03:59:2[ 415.381185][ T31] #3: ffff88802a49b510 (&port_dev->status_lock){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5831 [inline]
Apr 6 03:59:2[ 415.381185][ T31] #3: ffff88802a49b510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x2906/0x4fa0 drivers/usb/core/hub.c:5913
8 syzkaller daemon.err dhcpcd[54[ 415.394717][ T31] #4: ffff888029408f68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5429 [inline]
8 syzkaller daemon.err dhcpcd[54[ 415.394717][ T31] #4: ffff888029408f68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
8 syzkaller daemon.err dhcpcd[54[ 415.394717][ T31] #4: ffff888029408f68 (hcd->address0_mutex){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5831 [inline]
8 syzkaller daemon.err dhcpcd[54[ 415.394717][ T31] #4: ffff888029408f68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x292b/0x4fa0 drivers/usb/core/hub.c:5913
91]: libudev: re[ 415.404898][ T31] 5 locks held by kworker/1:7/5904:
ceived NULL devi[ 415.411440][ T31] #0: ffff888021adb148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
ce
Apr 6 03:59[ 415.424123][ T31] #1: ffffc90002ec7d18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
:28 syzkaller kern.info kernel: [ 415.438068][ T31] #2: ffff888145766198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
:28 syzkaller kern.info kernel: [ 415.438068][ T31] #2: ffff888145766198 (&dev->mutex){....}-{4:4}, at: hub_event+0x1c0/0x4fa0 drivers/usb/core/hub.c:5859
[ 414.405648][ [ 415.447859][ T31] #3: ffff88802a2c2510 (&port_dev->status_lock){+.+.}-{4:4}, at: usb_lock_port drivers/usb/core/hub.c:3220 [inline]
[ 414.405648][ [ 415.447859][ T31] #3: ffff88802a2c2510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5428 [inline]
[ 414.405648][ [ 415.447859][ T31] #3: ffff88802a2c2510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
[ 414.405648][ [ 415.447859][ T31] #3: ffff88802a2c2510 (&port_dev->status_lock){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5831 [inline]
[ 414.405648][ [ 415.447859][ T31] #3: ffff88802a2c2510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x2906/0x4fa0 drivers/usb/core/hub.c:5913
T31] ? __pfx_[ 415.459087][ T31] #4: ffff888029807f68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5429 [inline]
T31] ? __pfx_[ 415.459087][ T31] #4: ffff888029807f68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
T31] ? __pfx_[ 415.459087][ T31] #4: ffff888029807f68 (hcd->address0_mutex){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5831 [inline]
T31] ? __pfx_[ 415.459087][ T31] #4: ffff888029807f68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x292b/0x4fa0 drivers/usb/core/hub.c:5913
__schedule+0x10/[ 415.470228][ T31] 5 locks held by kworker/0:5/5906:
0x10
Apr 6 03:[ 415.476639][ T31] #0: ffff888021adb148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x12a2/0x1b70 kernel/workqueue.c:3213
59:28 syzkaller [ 415.488858][ T31] #1: ffffc90002eb7d18 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x929/0x1b70 kernel/workqueue.c:3214
daemon.err dhcpc[ 415.501451][ T31] #2: ffff88814577e198 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:922 [inline]
daemon.err dhcpc[ 415.501451][ T31] #2: ffff88814577e198 (&dev->mutex){....}-{4:4}, at: hub_event+0x1c0/0x4fa0 drivers/usb/core/hub.c:5859
d[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkalle[ 415.516016][ T31] #3: ffff888145bb9510 (&port_dev->status_lock){+.+.}-{4:4}, at: usb_lock_port drivers/usb/core/hub.c:3220 [inline]
Apr 6 03:59:28 syzkalle[ 415.516016][ T31] #3: ffff888145bb9510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5428 [inline]
Apr 6 03:59:28 syzkalle[ 415.516016][ T31] #3: ffff888145bb9510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
Apr 6 03:59:28 syzkalle[ 415.516016][ T31] #3: ffff888145bb9510 (&port_dev->status_lock){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5831 [inline]
Apr 6 03:59:28 syzkalle[ 415.516016][ T31] #3: ffff888145bb9510 (&port_dev->status_lock){+.+.}-{4:4}, at: hub_event+0x2906/0x4fa0 drivers/usb/core/hub.c:5913
r daemon.err dhcpcd[5491]: libudev: received NULL device
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NApr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 [ 415.542693][ T31] #4: ffff88802930ef68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect drivers/usb/core/hub.c:5429 [inline]
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NApr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 [ 415.542693][ T31] #4: ffff88802930ef68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_port_connect_change drivers/usb/core/hub.c:5671 [inline]
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NApr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 [ 415.542693][ T31] #4: ffff88802930ef68 (hcd->address0_mutex){+.+.}-{4:4}, at: port_event drivers/usb/core/hub.c:5831 [inline]
Apr 6 03:59:28 syzkaller daemon.err dhcpcd[5491]: libudev: received NApr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 Apr 6 03:59:28 [ 415.542693][ T31] #4: ffff88802930ef68 (hcd->address0_mutex){+.+.}-{4:4}, at: hub_event+0x292b/0x4fa0 drivers/usb/core/hub.c:5913
syzkaller daemonApr 6 03:59:28 [ 415.553652][ T31]