Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device[ 1036.270638][ T31] INFO: task kworker/0:1:10 blocked for more than 143 seconds. Apr 6 03:50:2[ 1036.278898][ T31] Not tainted 6.14.0-syzkaller-13524-gf4d2ef48250a #0 4 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkal[ 1036.316462][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. ler daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 [ 1036.346447][ T31] task:kworker/0:1 state:D stack:23784 pid:10 tgid:10 ppid:2 task_flags:0x4208060 flags:0x00004000 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:[ 1036.378794][ T31] Workqueue: usb_hub_wq hub_event 50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhc[ 1036.392899][ T31] Call Trace: pcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: lib[ 1036.405586][ T31] udev: received NULL device Apr 6 03:50:24 syzk[ 1036.413460][ T31] context_switch kernel/sched/core.c:5382 [inline] Apr 6 03:50:24 syzk[ 1036.413460][ T31] __schedule+0x116f/0x5de0 kernel/sched/core.c:6767 aller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 sy[ 1036.424646][ T31] ? __lock_acquire+0x5ca/0x1ba0 kernel/locking/lockdep.c:5232 zkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 [ 1036.436848][ T31] ? __pfx___schedule+0x10/0x10 usercopy_64.c:-1 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:2[ 1036.448213][ T31] ? find_held_lock+0x2b/0x80 kernel/locking/lockdep.c:5348 4 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller da[ 1036.461411][ T31] ? sched_submit_work kernel/sched/core.c:6826 [inline] Apr 6 03:50:24 syzkaller da[ 1036.461411][ T31] ? schedule+0x2d7/0x3a0 kernel/sched/core.c:6859 emon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller [ 1036.472165][ T31] __schedule_loop kernel/sched/core.c:6845 [inline] Apr 6 03:50:24 syzkaller [ 1036.472165][ T31] schedule+0xe7/0x3a0 kernel/sched/core.c:6860 daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkalle[ 1036.484086][ T31] usb_kill_urb drivers/usb/core/urb.c:713 [inline] Apr 6 03:50:24 syzkalle[ 1036.484086][ T31] usb_kill_urb+0x253/0x320 drivers/usb/core/urb.c:699 r daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkal[ 1036.495838][ T31] ? __pfx_usb_kill_urb+0x10/0x10 drivers/usb/core/urb.c:928 ler daemon.err d[ 1036.501409][T18740] Bluetooth: hci5: command 0x1003 tx timeout hcpcd[5491]: libudev: received N[ 1036.501453][ T5834] Bluetooth: hci5: Opcode 0x1003 failed: -110 ULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL de[ 1036.553783][ T31] ? __pfx_autoremove_wake_function+0x10/0x10 include/linux/list.h:196 vice Apr 6 03:50:24 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 6 0[ 1036.565865][ T31] usb_start_wait_urb+0x250/0x4b0 drivers/usb/core/message.c:65 3:50:24 syzkalle[ 1036.568037][ T31] ? __pfx_usb_start_wait_urb+0x10/0x10 drivers/usb/core/message.c:37 r daemon.err dhc[ 1036.568078][ T31] ? __asan_memset+0x23/0x50 mm/kasan/shadow.c:84 pcd[5491]: libud[ 1036.568109][ T31] usb_internal_control_msg drivers/usb/core/message.c:103 [inline] pcd[5491]: libud[ 1036.568109][ T31] usb_control_msg+0x326/0x4a0 drivers/usb/core/message.c:154 ev: received NUL[ 1036.568179][ T31] ? __pfx_usb_control_msg+0x10/0x10 drivers/usb/core/message.c:68 L device Apr 6 03:50:24 syzkal[ 1036.601741][ T31] get_bMaxPacketSize0.constprop.0+0xd0/0x1f0 drivers/usb/core/hub.c:4815 ler daemon.err d[ 1036.609573][ T31] hub_port_init+0x690/0x3a70 drivers/usb/core/hub.c:5011 hcpcd[5491]: lib[ 1036.615695][ T31] hub_port_connect drivers/usb/core/hub.c:5460 [inline] hcpcd[5491]: lib[ 1036.615695][ T31] hub_port_connect_change drivers/usb/core/hub.c:5671 [inline] hcpcd[5491]: lib[ 1036.615695][ T31] port_event drivers/usb/core/hub.c:5831 [inline] hcpcd[5491]: lib[ 1036.615695][ T31] hub_event+0x2c67/0x4fa0 drivers/usb/core/hub.c:5913 udev: received N[ 1036.621435][ T31] ? __pfx_hub_event+0x10/0x10 drivers/usb/core/hub.c:4666 ULL device Apr [ 1036.628115][ T31] ? debug_object_deactivate+0x1ec/0x3a0 lib/debugobjects.c:888 6 03:50:24 syzk[ 1036.634662][ T31] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] 6 03:50:24 syzk[ 1036.634662][ T31] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:736 aller daemon.err[ 1036.640817][ T31] process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3238 dhcpcd[5491]: l[ 1036.647219][ T31] ? __pfx_hcd_resume_work+0x10/0x10 drivers/usb/core/hcd.c:2482 Apr 6 03:50:24 [ 1036.653916][ T31] ? __pfx_process_one_work+0x10/0x10 arch/x86/include/asm/bitops.h:206 syzkaller daemon[ 1036.660641][ T31] ? assign_work+0x1a0/0x250 kernel/workqueue.c:1200 .err dhcpcd[5491[ 1036.666672][ T31] process_scheduled_works kernel/workqueue.c:3319 [inline] .err dhcpcd[5491[ 1036.666672][ T31] worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400 ]: libudev: rece[ 1036.672691][ T31] ? __pfx_worker_thread+0x10/0x10 include/linux/list.h:183 ived NULL device[ 1036.679058][ T31] kthread+0x3c2/0x780 kernel/kthread.c:464 Apr 6 03:50:2[ 1036.679086][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206 4 syzkaller daem[ 1036.690624][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206 on.err dhcpcd[54[ 1036.696576][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206 Apr 6 03:50:24 [ 1036.702747][ T31] ? __pfx_kthread+0x10/0x10 arch/x86/include/asm/bitops.h:206 Apr 6 03:50:24 Apr 6 03:50:24 Apr 6 03:50:24 Apr 6 03:50:24 [ 1036.702773][ T31] ? rcu_is_watching_curr_cpu include/linux/context_tracking.h:128 [inline] Apr 6 03:50:24 Apr 6 03:50:24 Apr 6 03:50:24 Apr 6 03:50:24 [ 1036.702773][ T31] ? rcu_is_watching+0x12/0xc0 kernel/rcu/tree.c:736