Apr 5 12:22:19 syzkaller daApr 5 12:22:19 syzkaller daemon.err dhcpcd[5491Apr 5 12:22:19 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deviceApr 5 12:22:19 syzkaller daemonApr 5 12:22:19 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:19 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deviApr 5 12:22:19 Apr 5 12:22:19 Apr 5 12:22:19 syzkaller daemonApr 5 12:22:19 syzkaller daemon.err dhcpcd[5491Apr 5 12:22:19 syzkaller daemonApr 5 12:22:19 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: receApr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: receApr 5 12:22:20 [ 453.664614][ T31] INFO: task kworker/0:2:972 blocked for more than 143 seconds. Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491Apr 5 12:22:20 [ 453.680506][ T31] Not tainted 6.14.0-syzkaller-13423-ga8662bcd2ff1 #0 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: receApr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 syzkaller daemon.err dhcpcd[5491Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon[ 453.723042][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. .err dhcpcd[5491]: libudev: received NULL deviceApr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: receApr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deviApr 5 12:22:20 syzkaller daemonApr 5 12:22:20 syzkaller daemon.err dhcpcd[5491Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 syzkaller daemon.err dhcpcd[5491Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL devi[ 453.788948][ T31] task:kworker/0:2 state:D stack:23992 pid:972 tgid:972 ppid:2 task_flags:0x4208060 flags:0x00004000 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:20 syzkaller daemon.err dhcpcd[Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: reApr 5 12:22:20 syzkaller daemon[ 453.838572][ T31] Workqueue: usb_hub_wq hub_event .err dhcpcd[5491Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:20 syzkaller daemon.err dhcpcd[54[ 453.858787][ T31] Call Trace: 91]: libudev: reApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon[ 453.871065][ T31] .err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:20 syzkaller daem[ 453.879881][ T31] context_switch kernel/sched/core.c:5382 [inline] Apr 5 12:22:20 syzkaller daem[ 453.879881][ T31] __schedule+0x116f/0x5de0 kernel/sched/core.c:6767 on.err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: [ 453.895097][ T31] ? mark_usage kernel/locking/lockdep.c:4643 [inline] Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: [ 453.895097][ T31] ? __lock_acquire+0x9c1/0x1ba0 kernel/locking/lockdep.c:5189 received NULL device Apr 5 12:22:20 syzkaller daemon.err dhcpcApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: rece[ 453.913920][ T31] ? __pfx___schedule+0x10/0x10 usercopy_64.c:-1 ived NULL device Apr 5 12:22:20 syzkaller daemApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:20 syzkaller daem[ 453.934437][ T31] ? find_held_lock+0x2b/0x80 kernel/locking/lockdep.c:5348 on.err dhcpcd[5491]: libudev: received NULL device Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deApr 5 12:22:20 syzkaller daemon[ 453.953708][ T31] ? sched_submit_work kernel/sched/core.c:6826 [inline] Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deApr 5 12:22:20 syzkaller daemon[ 453.953708][ T31] ? schedule+0x2d7/0x3a0 kernel/sched/core.c:6859 .err dhcpcd[5491Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deviceApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deviceApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 [ 453.990854][ T31] __schedule_loop kernel/sched/core.c:6845 [inline] .err dhcpcd[5491Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deviceApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deviceApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 [ 453.990854][ T31] schedule+0xe7/0x3a0 kernel/sched/core.c:6860 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deviceApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon[ 454.020088][ T31] usb_kill_urb drivers/usb/core/urb.c:713 [inline] Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemonApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon.err dhcpcd[5491]: libudev: received NULL deviceApr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 Apr 5 12:22:20 syzkaller daemon[ 454.020088][ T31] usb_kill_urb+0x253/0x320 drivers/usb/core/urb.c:699