[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 16.076231][ C1] random: crng init done [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.202' (ECDSA) to the list of known hosts. 2019/08/29 22:53:42 parsed 1 programs 2019/08/29 22:53:45 executed programs: 0 syzkaller login: [ 27.486397][ T1744] cgroup1: Unknown subsys name 'perf_event' [ 27.497668][ T1744] cgroup1: Unknown subsys name 'net_cls' [ 27.506109][ T1748] cgroup1: Unknown subsys name 'perf_event' [ 27.508255][ T1749] cgroup1: Unknown subsys name 'perf_event' [ 27.515049][ T1748] cgroup1: Unknown subsys name 'net_cls' [ 27.521884][ T1749] cgroup1: Unknown subsys name 'net_cls' [ 27.531428][ T1751] cgroup1: Unknown subsys name 'perf_event' [ 27.535630][ T1755] cgroup1: Unknown subsys name 'perf_event' [ 27.537815][ T1751] cgroup1: Unknown subsys name 'net_cls' [ 27.544299][ T1755] cgroup1: Unknown subsys name 'net_cls' [ 27.566598][ T1761] cgroup1: Unknown subsys name 'perf_event' [ 27.576100][ T1761] cgroup1: Unknown subsys name 'net_cls' [ 30.750273][ T17] usb 2-1: new low-speed USB device number 2 using dummy_hcd [ 30.790684][ T102] usb 1-1: new low-speed USB device number 2 using dummy_hcd [ 30.840216][ T2715] usb 6-1: new low-speed USB device number 2 using dummy_hcd [ 30.900195][ T2741] usb 3-1: new low-speed USB device number 2 using dummy_hcd [ 30.930185][ T100] usb 5-1: new low-speed USB device number 2 using dummy_hcd [ 30.940198][ T12] usb 4-1: new low-speed USB device number 2 using dummy_hcd [ 31.110762][ T17] usb 2-1: config 0 has an invalid interface number: 236 but max is 2 [ 31.119715][ T17] usb 2-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 31.130591][ T17] usb 2-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 31.139692][ T17] usb 2-1: config 0 has no interface number 0 [ 31.146612][ T17] usb 2-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 31.156785][ T17] usb 2-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 31.166132][ T17] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 31.176550][ T17] usb 2-1: config 0 descriptor?? [ 31.182031][ T102] usb 1-1: config 0 has an invalid interface number: 236 but max is 2 [ 31.190530][ T102] usb 1-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 31.201139][ T102] usb 1-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 31.210320][ T102] usb 1-1: config 0 has no interface number 0 [ 31.216924][ T102] usb 1-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 31.227434][ T102] usb 1-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 31.236924][ T102] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 31.246108][ T102] usb 1-1: config 0 descriptor?? [ 31.251445][ T2715] usb 6-1: config 0 has an invalid interface number: 236 but max is 2 [ 31.259765][ T2715] usb 6-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 31.270279][ T2715] usb 6-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 31.279130][ T2715] usb 6-1: config 0 has no interface number 0 [ 31.289663][ T2715] usb 6-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 31.299876][ T2715] usb 6-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 31.309192][ T2715] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 31.318357][ T17] iowarrior 2-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior0 [ 31.321260][ T100] usb 5-1: config 0 has an invalid interface number: 236 but max is 2 [ 31.329320][ T2741] usb 3-1: config 0 has an invalid interface number: 236 but max is 2 [ 31.337217][ T100] usb 5-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 31.345370][ T2741] usb 3-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 31.345384][ T2741] usb 3-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 31.355709][ T100] usb 5-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 31.366093][ T2741] usb 3-1: config 0 has no interface number 0 [ 31.374938][ T100] usb 5-1: config 0 has no interface number 0 [ 31.375232][ T12] usb 4-1: config 0 has an invalid interface number: 236 but max is 2 [ 31.398076][ T2741] usb 3-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 31.404418][ T12] usb 4-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 31.404434][ T12] usb 4-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 31.404444][ T12] usb 4-1: config 0 has no interface number 0 [ 31.420366][ T12] usb 4-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 31.425030][ T2741] usb 3-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 31.433872][ T12] usb 4-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 31.439905][ T2741] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 31.449968][ T12] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 31.450052][ T100] usb 5-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 31.459736][ T2715] usb 6-1: config 0 descriptor?? [ 31.468282][ T100] usb 5-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 31.468299][ T100] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 31.476629][ T102] iowarrior 1-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior1 [ 31.486180][ T12] usb 4-1: config 0 descriptor?? [ 31.518593][ T2741] usb 3-1: config 0 descriptor?? [ 31.529888][ T100] usb 5-1: config 0 descriptor?? [ 31.545546][ T2715] iowarrior 6-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior2 [ 31.563141][ T12] iowarrior 4-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior3 [ 31.572399][ T2741] iowarrior 3-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior4 [ 31.611572][ T2741] usb 2-1: USB disconnect, device number 2 [ 31.611921][ T12] usb 1-1: USB disconnect, device number 2 [ 31.624310][ T100] iowarrior 5-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior5 [ 31.638585][ T12] iowarrior 1-1:0.236: I/O-Warror #1 now disconnected [ 31.643017][ T2741] iowarrior 2-1:0.236: I/O-Warror #0 now disconnected [ 31.741777][ T100] usb 6-1: USB disconnect, device number 2 [ 31.748425][ T100] iowarrior 6-1:0.236: I/O-Warror #2 now disconnected [ 31.761490][ T2748] usb 4-1: USB disconnect, device number 2 [ 31.772232][ T2715] usb 3-1: USB disconnect, device number 2 [ 31.772461][ T2748] iowarrior 4-1:0.236: I/O-Warror #3 now disconnected [ 31.781325][ T2715] iowarrior 3-1:0.236: I/O-Warror #4 now disconnected [ 31.794128][ T2755] usb 5-1: USB disconnect, device number 2 [ 31.804341][ T2755] iowarrior 5-1:0.236: I/O-Warror #5 now disconnected [ 32.383527][ T2715] usb 1-1: new low-speed USB device number 3 using dummy_hcd [ 32.430217][ T2755] usb 2-1: new low-speed USB device number 3 using dummy_hcd [ 32.510785][ T2741] usb 6-1: new low-speed USB device number 3 using dummy_hcd [ 32.540189][ T2748] usb 4-1: new low-speed USB device number 3 using dummy_hcd [ 32.550281][ T102] usb 3-1: new low-speed USB device number 3 using dummy_hcd [ 32.580276][ T100] usb 5-1: new low-speed USB device number 3 using dummy_hcd [ 32.750386][ T2715] usb 1-1: config 0 has an invalid interface number: 236 but max is 2 [ 32.758668][ T2715] usb 1-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 32.768964][ T2715] usb 1-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 32.777878][ T2715] usb 1-1: config 0 has no interface number 0 [ 32.784148][ T2715] usb 1-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 32.794322][ T2715] usb 1-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 32.803430][ T2715] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 32.813280][ T2715] usb 1-1: config 0 descriptor?? [ 32.820379][ T2755] usb 2-1: config 0 has an invalid interface number: 236 but max is 2 [ 32.828715][ T2755] usb 2-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 32.839237][ T2755] usb 2-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 32.848636][ T2755] usb 2-1: config 0 has no interface number 0 [ 32.855100][ T2755] usb 2-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 32.857465][ T2715] iowarrior 1-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior0 [ 32.865239][ T2755] usb 2-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 32.865253][ T2755] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 32.881474][ T2755] usb 2-1: config 0 descriptor?? [ 32.920261][ T2741] usb 6-1: config 0 has an invalid interface number: 236 but max is 2 [ 32.928915][ T2741] usb 6-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 32.939652][ T2741] usb 6-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 32.940631][ T2748] usb 4-1: config 0 has an invalid interface number: 236 but max is 2 [ 32.949162][ T2741] usb 6-1: config 0 has no interface number 0 [ 32.957334][ T2748] usb 4-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 32.963843][ T102] usb 3-1: config 0 has an invalid interface number: 236 but max is 2 [ 32.973920][ T2748] usb 4-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 32.973932][ T2748] usb 4-1: config 0 has no interface number 0 [ 32.976475][ T2755] iowarrior 2-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior1 [ 32.982384][ T102] usb 3-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 32.982401][ T102] usb 3-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 32.993095][ T2748] usb 4-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 32.997735][ T102] usb 3-1: config 0 has no interface number 0 [ 33.002630][ T102] usb 3-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 33.008749][ T2748] usb 4-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 33.019098][ T102] usb 3-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 33.028058][ T2748] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 33.038087][ T102] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 33.072737][ T2748] usb 4-1: config 0 descriptor?? [ 33.080990][ T2741] usb 6-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 33.104300][ T2741] usb 6-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 33.110374][ T100] usb 5-1: config 0 has an invalid interface number: 236 but max is 2 [ 33.113595][ T2741] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 33.121873][ T100] usb 5-1: config 0 has an invalid descriptor of length 99, skipping remainder of the config [ 33.140547][ T100] usb 5-1: config 0 has 1 interface, different from the descriptor's value: 3 [ 33.149533][ T100] usb 5-1: config 0 has no interface number 0 [ 33.156673][ T2741] usb 6-1: config 0 descriptor?? [ 33.162216][ T102] usb 3-1: config 0 descriptor?? [ 33.166606][ T2748] iowarrior 4-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior2 [ 33.179438][ T100] usb 5-1: config 0 interface 236 altsetting 0 endpoint 0x81 is Bulk; changing to Interrupt [ 33.189796][ T100] usb 5-1: New USB device found, idVendor=07c0, idProduct=1501, bcdDevice=74.a0 [ 33.199242][ T100] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 33.208237][ T2715] usb 1-1: USB disconnect, device number 3 [ 33.208500][ T100] usb 5-1: config 0 descriptor?? [ 33.220369][ T2759] iowarrior 1-1:0.236: Error -19 while submitting URB [ 33.229575][ T102] iowarrior 3-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior3 [ 33.241580][ T2741] iowarrior 6-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior4 [ 33.245847][ T2748] usb 2-1: USB disconnect, device number 3 [ 33.258639][ T2715] iowarrior 1-1:0.236: I/O-Warror #0 now disconnected [ 33.262838][ T100] iowarrior 5-1:0.236: IOWarrior product=0x1501, serial= interface=236 now attached to iowarrior0 [ 33.285086][ T2748] iowarrior 2-1:0.236: I/O-Warror #1 now disconnected [ 33.481296][ T102] usb 6-1: USB disconnect, device number 3 [ 33.482294][ T100] usb 4-1: USB disconnect, device number 3 [ 33.501323][ T2748] usb 5-1: USB disconnect, device number 3 [ 33.506789][ T102] iowarrior 6-1:0.236: I/O-Warror #4 now disconnected [ 33.508142][ T100] iowarrior 4-1:0.236: I/O-Warror #2 now disconnected [ 33.531096][ T2748] ================================================================== [ 33.531764][ T2715] usb 3-1: USB disconnect, device number 3 [ 33.539498][ T2748] BUG: KASAN: use-after-free in __mutex_lock+0xf23/0x1360 [ 33.539515][ T2748] Read of size 8 at addr ffff8881d82847d8 by task kworker/0:3/2748 [ 33.539525][ T2748] [ 33.554088][ T2715] iowarrior 3-1:0.236: I/O-Warror #3 now disconnected [ 33.560313][ T2748] CPU: 0 PID: 2748 Comm: kworker/0:3 Not tainted 5.3.0-rc5+ #28 [ 33.560320][ T2748] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 33.560339][ T2748] Workqueue: usb_hub_wq hub_event [ 33.560346][ T2748] Call Trace: [ 33.560365][ T2748] dump_stack+0xca/0x13e [ 33.560377][ T2748] ? __mutex_lock+0xf23/0x1360 [ 33.560391][ T2748] ? __mutex_lock+0xf23/0x1360 [ 33.609986][ T2748] print_address_description+0x6a/0x32c [ 33.615525][ T2748] ? __mutex_lock+0xf23/0x1360 [ 33.620286][ T2748] ? __mutex_lock+0xf23/0x1360 [ 33.625032][ T2748] __kasan_report.cold+0x1a/0x33 [ 33.629956][ T2748] ? __mutex_lock+0xf23/0x1360 [ 33.634831][ T2748] kasan_report+0xe/0x12 [ 33.639493][ T2748] __mutex_lock+0xf23/0x1360 [ 33.644069][ T2748] ? lock_downgrade+0x6e0/0x6e0 [ 33.649076][ T2748] ? iowarrior_disconnect+0xf0/0x2c0 [ 33.654340][ T2748] ? mutex_trylock+0x2c0/0x2c0 [ 33.659102][ T2748] ? mutex_trylock+0x2c0/0x2c0 [ 33.663982][ T2748] ? __mutex_unlock_slowpath+0xea/0x670 [ 33.669674][ T2748] ? wait_for_completion+0x3c0/0x3c0 [ 33.674980][ T2748] ? __down_timeout+0x2d0/0x2d0 2019/08/29 22:53:51 executed programs: 12 [ 33.679816][ T2748] ? iowarrior_disconnect+0xf0/0x2c0 [ 33.685227][ T2748] iowarrior_disconnect+0xf0/0x2c0 [ 33.690405][ T2748] usb_unbind_interface+0x1bd/0x8a0 [ 33.695583][ T2748] ? usb_autoresume_device+0x60/0x60 [ 33.700846][ T2748] device_release_driver_internal+0x42f/0x500 [ 33.707141][ T2748] bus_remove_device+0x2dc/0x4a0 [ 33.712081][ T2748] device_del+0x420/0xb10 [ 33.716398][ T2748] ? __device_links_no_driver+0x240/0x240 [ 33.722123][ T2748] ? usb_remove_ep_devs+0x3e/0x80 [ 33.727171][ T2748] ? remove_intf_ep_devs+0x13f/0x1d0 [ 33.732472][ T2748] usb_disable_device+0x211/0x690 [ 33.737513][ T2748] usb_disconnect+0x284/0x8d0 [ 33.742213][ T2748] hub_event+0x1454/0x3640 [ 33.746680][ T2748] ? find_held_lock+0x2d/0x110 [ 33.751472][ T2748] ? mark_held_locks+0xe0/0xe0 [ 33.756351][ T2748] ? hub_port_debounce+0x260/0x260 [ 33.761460][ T2748] process_one_work+0x92b/0x1530 [ 33.766407][ T2748] ? pwq_dec_nr_in_flight+0x310/0x310 [ 33.771875][ T2748] ? do_raw_spin_lock+0x11a/0x280 [ 33.776882][ T2748] worker_thread+0x96/0xe20 [ 33.781573][ T2748] ? process_one_work+0x1530/0x1530 [ 33.786855][ T2748] kthread+0x318/0x420 [ 33.790928][ T2748] ? kthread_create_on_node+0xf0/0xf0 [ 33.796281][ T2748] ret_from_fork+0x24/0x30 [ 33.800670][ T2748] [ 33.803067][ T2748] Allocated by task 100: [ 33.807413][ T2748] save_stack+0x1b/0x80 [ 33.811556][ T2748] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 33.817197][ T2748] iowarrior_probe+0x7a/0x10b2 [ 33.822098][ T2748] usb_probe_interface+0x305/0x7a0 [ 33.827317][ T2748] really_probe+0x281/0x6d0 [ 33.831918][ T2748] driver_probe_device+0x101/0x1b0 [ 33.837032][ T2748] __device_attach_driver+0x1c2/0x220 [ 33.842609][ T2748] bus_for_each_drv+0x162/0x1e0 [ 33.847453][ T2748] __device_attach+0x217/0x360 [ 33.852198][ T2748] bus_probe_device+0x1e4/0x290 [ 33.857039][ T2748] device_add+0xae6/0x16f0 [ 33.861621][ T2748] usb_set_configuration+0xdf6/0x1670 [ 33.867006][ T2748] generic_probe+0x9d/0xd5 [ 33.871508][ T2748] usb_probe_device+0x99/0x100 [ 33.876262][ T2748] really_probe+0x281/0x6d0 [ 33.880887][ T2748] driver_probe_device+0x101/0x1b0 [ 33.885989][ T2748] __device_attach_driver+0x1c2/0x220 [ 33.891482][ T2748] bus_for_each_drv+0x162/0x1e0 [ 33.896443][ T2748] __device_attach+0x217/0x360 [ 33.901409][ T2748] bus_probe_device+0x1e4/0x290 [ 33.906285][ T2748] device_add+0xae6/0x16f0 [ 33.910815][ T2748] usb_new_device.cold+0x6a4/0xe79 [ 33.915923][ T2748] hub_event+0x1b5c/0x3640 [ 33.920435][ T2748] process_one_work+0x92b/0x1530 [ 33.925368][ T2748] worker_thread+0x96/0xe20 [ 33.930028][ T2748] kthread+0x318/0x420 [ 33.934107][ T2748] ret_from_fork+0x24/0x30 [ 33.939106][ T2748] [ 33.941613][ T2748] Freed by task 2765: [ 33.945678][ T2748] save_stack+0x1b/0x80 [ 33.949814][ T2748] __kasan_slab_free+0x130/0x180 [ 33.954871][ T2748] kfree+0xe4/0x2f0 [ 33.958662][ T2748] iowarrior_release+0x187/0x280 [ 33.963579][ T2748] __fput+0x2d7/0x840 [ 33.967546][ T2748] task_work_run+0x13f/0x1c0 [ 33.972134][ T2748] exit_to_usermode_loop+0x1d2/0x200 [ 33.977657][ T2748] do_syscall_64+0x45f/0x580 [ 33.982354][ T2748] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 33.988239][ T2748] [ 33.990580][ T2748] The buggy address belongs to the object at ffff8881d8284780 [ 33.990580][ T2748] which belongs to the cache kmalloc-512 of size 512 [ 34.004730][ T2748] The buggy address is located 88 bytes inside of [ 34.004730][ T2748] 512-byte region [ffff8881d8284780, ffff8881d8284980) [ 34.017906][ T2748] The buggy address belongs to the page: [ 34.023904][ T2748] page:ffffea000760a100 refcount:1 mapcount:0 mapping:ffff8881da002500 index:0x0 compound_mapcount: 0 [ 34.034838][ T2748] flags: 0x200000000010200(slab|head) [ 34.040588][ T2748] raw: 0200000000010200 ffffea0007655880 0000000d0000000d ffff8881da002500 [ 34.049175][ T2748] raw: 0000000000000000 00000000000c000c 00000001ffffffff 0000000000000000 [ 34.057779][ T2748] page dumped because: kasan: bad access detected [ 34.064464][ T2748] [ 34.066786][ T2748] Memory state around the buggy address: [ 34.072434][ T2748] ffff8881d8284680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.081215][ T2748] ffff8881d8284700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.089556][ T2748] >ffff8881d8284780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.097601][ T2748] ^ [ 34.104525][ T2748] ffff8881d8284800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.112583][ T2748] ffff8881d8284880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.120631][ T2748] ================================================================== [ 34.128696][ T2748] Disabling lock debugging due to kernel taint [ 34.135154][ T2748] Kernel panic - not syncing: panic_on_warn set ... [ 34.141835][ T2748] CPU: 0 PID: 2748 Comm: kworker/0:3 Tainted: G B 5.3.0-rc5+ #28 [ 34.150846][ T2748] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 34.161402][ T2748] Workqueue: usb_hub_wq hub_event [ 34.166417][ T2748] Call Trace: [ 34.169866][ T2748] dump_stack+0xca/0x13e [ 34.174106][ T2748] panic+0x2a3/0x6da [ 34.177991][ T2748] ? add_taint.cold+0x16/0x16 [ 34.182733][ T2748] ? retint_kernel+0x10/0x10 [ 34.187300][ T2748] ? trace_hardirqs_on+0x55/0x1e0 [ 34.192304][ T2748] ? __mutex_lock+0xf23/0x1360 [ 34.197138][ T2748] end_report+0x43/0x49 [ 34.201292][ T2748] ? __mutex_lock+0xf23/0x1360 [ 34.206209][ T2748] __kasan_report.cold+0xd/0x33 [ 34.211104][ T2748] ? __mutex_lock+0xf23/0x1360 [ 34.215997][ T2748] kasan_report+0xe/0x12 [ 34.220219][ T2748] __mutex_lock+0xf23/0x1360 [ 34.224791][ T2748] ? lock_downgrade+0x6e0/0x6e0 [ 34.229626][ T2748] ? iowarrior_disconnect+0xf0/0x2c0 [ 34.234893][ T2748] ? mutex_trylock+0x2c0/0x2c0 [ 34.239635][ T2748] ? mutex_trylock+0x2c0/0x2c0 [ 34.244378][ T2748] ? __mutex_unlock_slowpath+0xea/0x670 [ 34.249900][ T2748] ? wait_for_completion+0x3c0/0x3c0 [ 34.255248][ T2748] ? __down_timeout+0x2d0/0x2d0 [ 34.260076][ T2748] ? iowarrior_disconnect+0xf0/0x2c0 [ 34.265365][ T2748] iowarrior_disconnect+0xf0/0x2c0 [ 34.270633][ T2748] usb_unbind_interface+0x1bd/0x8a0 [ 34.275899][ T2748] ? usb_autoresume_device+0x60/0x60 [ 34.281265][ T2748] device_release_driver_internal+0x42f/0x500 [ 34.287313][ T2748] bus_remove_device+0x2dc/0x4a0 [ 34.292234][ T2748] device_del+0x420/0xb10 [ 34.296544][ T2748] ? __device_links_no_driver+0x240/0x240 [ 34.302244][ T2748] ? usb_remove_ep_devs+0x3e/0x80 [ 34.307251][ T2748] ? remove_intf_ep_devs+0x13f/0x1d0 [ 34.312516][ T2748] usb_disable_device+0x211/0x690 [ 34.317521][ T2748] usb_disconnect+0x284/0x8d0 [ 34.322180][ T2748] hub_event+0x1454/0x3640 [ 34.326589][ T2748] ? find_held_lock+0x2d/0x110 [ 34.331336][ T2748] ? mark_held_locks+0xe0/0xe0 [ 34.336078][ T2748] ? hub_port_debounce+0x260/0x260 [ 34.341193][ T2748] process_one_work+0x92b/0x1530 [ 34.346237][ T2748] ? pwq_dec_nr_in_flight+0x310/0x310 [ 34.351746][ T2748] ? do_raw_spin_lock+0x11a/0x280 [ 34.356839][ T2748] worker_thread+0x96/0xe20 [ 34.361326][ T2748] ? process_one_work+0x1530/0x1530 [ 34.366775][ T2748] kthread+0x318/0x420 [ 34.371000][ T2748] ? kthread_create_on_node+0xf0/0xf0 [ 34.376455][ T2748] ret_from_fork+0x24/0x30 [ 34.382195][ T2748] Kernel Offset: disabled [ 34.386763][ T2748] Rebooting in 86400 seconds..