[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[ 14.790556][ C1] random: crng init done [?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.0.6' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 759.788552][ T83] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 759.798500][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 759.798610][ T17] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 759.806696][ T1735] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 759.822078][ T102] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 759.829626][ T1737] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 760.028361][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 760.038561][ T12] usb 1-1: Using ep0 maxpacket: 16 [ 760.048866][ T17] usb 2-1: Using ep0 maxpacket: 16 [ 760.068349][ T102] usb 4-1: Using ep0 maxpacket: 16 [ 760.073862][ T1737] usb 3-1: Using ep0 maxpacket: 16 [ 760.079167][ T1735] usb 5-1: Using ep0 maxpacket: 16 [ 760.148721][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 760.158863][ T12] usb 1-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 760.158899][ T12] usb 1-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 760.158914][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 760.168826][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 760.168839][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 760.176605][ T83] usb 6-1: config 0 descriptor?? [ 760.180175][ T12] usb 1-1: config 0 descriptor?? [ 760.186690][ T17] usb 2-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 760.198633][ T102] usb 4-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 760.206177][ T17] usb 2-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 760.206191][ T17] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 760.211162][ T102] usb 4-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 760.226183][ T17] usb 2-1: config 0 descriptor?? [ 760.236122][ T102] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 760.236234][ T1735] usb 5-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 760.236258][ T1735] usb 5-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 760.245610][ T1730] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 760.253376][ T1735] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 760.298685][ T1732] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 760.305286][ T1737] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 760.330971][ T1737] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 760.340041][ T1737] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 760.349280][ T102] usb 4-1: config 0 descriptor?? [ 760.354904][ T1737] usb 3-1: config 0 descriptor?? [ 760.361237][ T1735] usb 5-1: config 0 descriptor?? [ 760.368458][ T1725] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 760.368464][ T1731] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 760.383386][ T1733] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 760.383565][ T1734] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program executing program [ 760.538480][ T83] usb 6-1: string descriptor 0 read error: -71 executing program executing program executing program executing program [ 760.578818][ T17] usb 2-1: string descriptor 0 read error: -71 [ 760.590056][ T17] chaoskey 2-1:0.0: Unable to register with hwrng [ 760.598206][ T83] usb 6-1: USB disconnect, device number 2 [ 760.607219][ T1744] hwrng: no data available [ 760.614646][ T17] usb 2-1: USB disconnect, device number 2 [ 760.638454][ T12] usb 1-1: string descriptor 0 read error: -71 [ 760.644789][ T102] usb 4-1: string descriptor 0 read error: -71 [ 760.651127][ T1735] usb 5-1: string descriptor 0 read error: -71 [ 760.679685][ T1737] usb 3-1: string descriptor 0 read error: -71 [ 760.686342][ T102] chaoskey 4-1:0.0: Unable to register with hwrng [ 760.693010][ T1735] chaoskey 5-1:0.0: Unable to register with hwrng [ 760.699647][ T12] usb 1-1: USB disconnect, device number 2 [ 760.709943][ T102] usb 4-1: USB disconnect, device number 2 [ 760.716496][ T1735] usb 5-1: USB disconnect, device number 2 [ 760.729675][ T1737] usb 3-1: USB disconnect, device number 2 [ 760.978333][ T17] usb 2-1: new high-speed USB device number 3 using dummy_hcd [ 761.068787][ T102] usb 4-1: new high-speed USB device number 3 using dummy_hcd [ 761.076821][ T1735] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 761.218343][ T17] usb 2-1: Using ep0 maxpacket: 16 [ 761.318340][ T1735] usb 5-1: Using ep0 maxpacket: 16 [ 761.323663][ T102] usb 4-1: Using ep0 maxpacket: 16 [ 761.338616][ T17] usb 2-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 761.348703][ T17] usb 2-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 761.357714][ T17] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 761.367153][ T17] usb 2-1: config 0 descriptor?? [ 761.388414][ T1742] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 761.438459][ T1735] usb 5-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 761.448462][ T1735] usb 5-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 761.457602][ T1735] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 761.465743][ T102] usb 4-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 761.475781][ T102] usb 4-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 761.485700][ T102] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 761.494542][ T1735] usb 5-1: config 0 descriptor?? [ 761.500748][ T102] usb 4-1: config 0 descriptor?? [ 761.518465][ T1746] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 761.518493][ T1749] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 761.638514][ T17] usb 2-1: string descriptor 0 read error: -71 [ 761.660276][ T17] usb 2-1: USB disconnect, device number 3 executing program executing program [ 761.778435][ T1735] usb 5-1: string descriptor 0 read error: -71 [ 761.784829][ T102] usb 4-1: string descriptor 0 read error: -71 [ 761.809447][ T102] chaoskey 4-1:0.0: Unable to register with hwrng [ 761.816386][ T1735] usb 5-1: USB disconnect, device number 3 [ 761.823683][ T102] usb 4-1: USB disconnect, device number 3 [ 762.188745][ T102] usb 4-1: new high-speed USB device number 4 using dummy_hcd [ 762.428347][ T102] usb 4-1: Using ep0 maxpacket: 16 [ 762.548451][ T102] usb 4-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 762.558432][ T102] usb 4-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 762.567475][ T102] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 762.576673][ T102] usb 4-1: config 0 descriptor?? [ 762.598477][ T1758] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 762.858532][ T102] usb 4-1: string descriptor 0 read error: -71 [ 762.882586][ T102] usb 4-1: USB disconnect, device number 4 executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 771.418372][ T83] usb 6-1: new high-speed USB device number 3 using dummy_hcd executing program [ 771.668378][ T83] usb 6-1: Using ep0 maxpacket: 16 executing program [ 771.788462][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 771.798950][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 771.808788][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 771.818000][ T83] usb 6-1: config 0 descriptor?? [ 771.838449][ T1769] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 772.098540][ T83] usb 6-1: string descriptor 0 read error: -71 [ 772.120142][ T83] usb 6-1: USB disconnect, device number 3 [ 772.138666][ T1776] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 782.948395][ T83] usb 6-1: new high-speed USB device number 4 using dummy_hcd [ 783.188413][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 783.308410][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 783.318377][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 783.327385][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 783.336543][ T83] usb 6-1: config 0 descriptor?? [ 783.358387][ T1788] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 783.628670][ T83] usb 6-1: string descriptor 0 read error: -71 [ 783.660643][ T83] usb 6-1: USB disconnect, device number 4 [ 783.678547][ T1792] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 794.458352][ T83] usb 6-1: new high-speed USB device number 5 using dummy_hcd [ 794.698333][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 794.818414][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 794.828581][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 794.837611][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 794.846891][ T83] usb 6-1: config 0 descriptor?? [ 794.878471][ T1804] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 795.138502][ T83] usb 6-1: string descriptor 0 read error: -71 [ 795.159890][ T83] usb 6-1: USB disconnect, device number 5 [ 795.178424][ T1807] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 805.978351][ T83] usb 6-1: new high-speed USB device number 6 using dummy_hcd [ 806.218333][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 806.338493][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 806.348462][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 806.357502][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 806.366617][ T83] usb 6-1: config 0 descriptor?? [ 806.388454][ T1819] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program executing program [ 806.648563][ T83] usb 6-1: string descriptor 0 read error: -71 [ 806.680963][ T83] usb 6-1: USB disconnect, device number 6 [ 806.708948][ T1825] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 817.498332][ T83] usb 6-1: new high-speed USB device number 7 using dummy_hcd [ 817.738321][ T83] usb 6-1: Using ep0 maxpacket: 16 executing program [ 817.868494][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 817.879621][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 817.888714][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 817.897645][ T83] usb 6-1: config 0 descriptor?? [ 817.918387][ T1836] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 818.198507][ T83] usb 6-1: string descriptor 0 read error: -71 [ 818.229940][ T83] usb 6-1: USB disconnect, device number 7 [ 818.248519][ T1842] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 829.018360][ T83] usb 6-1: new high-speed USB device number 8 using dummy_hcd [ 829.258324][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 829.378425][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 829.388755][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 829.397776][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 829.406774][ T83] usb 6-1: config 0 descriptor?? [ 829.428397][ T1854] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 829.688514][ T83] usb 6-1: string descriptor 0 read error: -71 [ 829.709765][ T83] usb 6-1: USB disconnect, device number 8 [ 829.728428][ T1857] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 840.548341][ T83] usb 6-1: new high-speed USB device number 9 using dummy_hcd executing program executing program [ 840.788338][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 840.908509][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 840.918472][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 840.927691][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 840.936825][ T83] usb 6-1: config 0 descriptor?? [ 840.958431][ T1869] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 841.208425][ T83] usb 6-1: string descriptor 0 read error: -71 [ 841.243187][ T83] usb 6-1: USB disconnect, device number 9 [ 841.258593][ T1874] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 852.058328][ T83] usb 6-1: new high-speed USB device number 10 using dummy_hcd [ 852.298327][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 852.418438][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 852.428593][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 852.437706][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 852.446656][ T83] usb 6-1: config 0 descriptor?? [ 852.478437][ T1886] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 852.758415][ T83] usb 6-1: string descriptor 0 read error: -71 [ 852.779937][ T83] usb 6-1: USB disconnect, device number 10 [ 852.808455][ T1891] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 863.578335][ T83] usb 6-1: new high-speed USB device number 11 using dummy_hcd [ 863.818387][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 863.938480][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 863.948455][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 863.957490][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 863.966503][ T83] usb 6-1: config 0 descriptor?? [ 863.988435][ T1903] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 864.248544][ T83] usb 6-1: string descriptor 0 read error: -71 [ 864.280077][ T83] usb 6-1: USB disconnect, device number 11 [ 864.298499][ T1907] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 875.098325][ T83] usb 6-1: new high-speed USB device number 12 using dummy_hcd [ 875.338382][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 875.458460][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 875.468669][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 875.478023][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 875.486896][ T83] usb 6-1: config 0 descriptor?? [ 875.508391][ T1919] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program executing program executing program [ 875.768576][ T83] usb 6-1: string descriptor 0 read error: -71 [ 875.800515][ T83] usb 6-1: USB disconnect, device number 12 [ 875.828510][ T1924] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 886.628349][ T83] usb 6-1: new high-speed USB device number 13 using dummy_hcd executing program [ 886.888337][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 887.008419][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 887.018619][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 887.027647][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 887.036699][ T83] usb 6-1: config 0 descriptor?? [ 887.058405][ T1939] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 887.328396][ T83] usb 6-1: string descriptor 0 read error: -71 [ 887.369762][ T83] usb 6-1: USB disconnect, device number 13 [ 887.388575][ T1944] hwrng: no data available executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 898.138345][ T83] usb 6-1: new high-speed USB device number 14 using dummy_hcd [ 898.378356][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 898.498463][ T83] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 898.508380][ T83] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 898.517416][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 898.526541][ T83] usb 6-1: config 0 descriptor?? [ 898.548411][ T1956] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 executing program [ 898.808498][ T83] usb 6-1: string descriptor 0 read error: -71 [ 898.832370][ T83] usb 6-1: USB disconnect, device number 14 [ 898.848482][ T1960] hwrng: no data available executing program executing program executing program executing program executing program executing program [ 904.188321][ T23] INFO: task kworker/0:1:12 blocked for more than 143 seconds. [ 904.196153][ T23] Not tainted 5.4.0-rc6+ #0 [ 904.201216][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 904.210015][ T23] kworker/0:1 D26016 12 2 0x80004000 [ 904.216454][ T23] Workqueue: usb_hub_wq hub_event [ 904.221648][ T23] Call Trace: [ 904.225077][ T23] ? __schedule+0x898/0x1ca0 [ 904.229705][ T23] ? __sched_text_start+0x8/0x8 [ 904.234590][ T23] ? lockdep_hardirqs_on+0x382/0x580 [ 904.240203][ T23] schedule+0xca/0x250 [ 904.244308][ T23] schedule_timeout+0x682/0xb20 [ 904.249279][ T23] ? find_held_lock+0x2d/0x110 [ 904.254047][ T23] ? usleep_range+0x160/0x160 [ 904.258792][ T23] ? mark_lock+0xbc/0x1160 [ 904.263265][ T23] ? do_raw_spin_lock+0x11a/0x280 [ 904.268323][ T23] ? mark_held_locks+0x9f/0xe0 [ 904.273537][ T23] ? _raw_spin_unlock_irq+0x24/0x30 [ 904.278824][ T23] wait_for_completion+0x26f/0x3c0 [ 904.284129][ T23] ? wait_for_completion_interruptible+0x420/0x420 [ 904.290793][ T23] ? wake_up_q+0xf0/0xf0 [ 904.295063][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 904.300638][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 904.305947][ T23] kthread_stop+0x10c/0x610 [ 904.310511][ T23] hwrng_unregister+0x190/0x210 [ 904.315698][ T23] chaoskey_disconnect+0x1b2/0x200 [ 904.320896][ T23] usb_unbind_interface+0x1bd/0x8a0 [ 904.326202][ T23] ? usb_autoresume_device+0x60/0x60 [ 904.331639][ T23] device_release_driver_internal+0x42f/0x500 [ 904.337710][ T23] bus_remove_device+0x2dc/0x4a0 [ 904.342677][ T23] device_del+0x420/0xb20 [ 904.347009][ T23] ? __device_link_del+0x2f0/0x2f0 [ 904.352179][ T23] ? usb_remove_ep_devs+0x3e/0x80 [ 904.357205][ T23] ? remove_intf_ep_devs+0x13f/0x1d0 [ 904.362791][ T23] usb_disable_device+0x211/0x690 [ 904.367814][ T23] usb_disconnect+0x284/0x8d0 [ 904.372514][ T23] hub_event+0x16f2/0x3800 [ 904.376942][ T23] ? hub_port_debounce+0x260/0x260 [ 904.382097][ T23] ? find_held_lock+0x2d/0x110 [ 904.386952][ T23] ? mark_held_locks+0xe0/0xe0 [ 904.391764][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 904.397304][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 904.402627][ T23] process_one_work+0x92b/0x1530 [ 904.407584][ T23] ? pwq_dec_nr_in_flight+0x310/0x310 [ 904.413017][ T23] ? do_raw_spin_lock+0x11a/0x280 [ 904.418049][ T23] worker_thread+0x7ab/0xe20 [ 904.422687][ T23] ? process_one_work+0x1530/0x1530 [ 904.427893][ T23] kthread+0x318/0x420 [ 904.432000][ T23] ? kthread_create_on_node+0xf0/0xf0 [ 904.437370][ T23] ret_from_fork+0x24/0x30 [ 904.442551][ T23] INFO: task kworker/0:3:1737 blocked for more than 143 seconds. [ 904.450443][ T23] Not tainted 5.4.0-rc6+ #0 [ 904.455463][ T23] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 904.464165][ T23] kworker/0:3 D26016 1737 2 0x80004000 [ 904.470557][ T23] Workqueue: usb_hub_wq hub_event [ 904.475567][ T23] Call Trace: [ 904.478886][ T23] ? __schedule+0x898/0x1ca0 [ 904.483476][ T23] ? __sched_text_start+0x8/0x8 [ 904.488372][ T23] ? lockdep_hardirqs_on+0x382/0x580 [ 904.493775][ T23] schedule+0xca/0x250 [ 904.497857][ T23] schedule_timeout+0x682/0xb20 [ 904.502745][ T23] ? find_held_lock+0x2d/0x110 [ 904.507536][ T23] ? usleep_range+0x160/0x160 [ 904.512252][ T23] ? mark_lock+0xbc/0x1160 [ 904.516685][ T23] ? do_raw_spin_lock+0x11a/0x280 [ 904.521754][ T23] ? mark_held_locks+0x9f/0xe0 [ 904.526727][ T23] ? _raw_spin_unlock_irq+0x24/0x30 [ 904.532082][ T23] wait_for_completion+0x26f/0x3c0 [ 904.537210][ T23] ? wait_for_completion_interruptible+0x420/0x420 [ 904.543756][ T23] ? wake_up_q+0xf0/0xf0 [ 904.548001][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 904.553939][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 904.559259][ T23] kthread_stop+0x10c/0x610 [ 904.563767][ T23] hwrng_unregister+0x190/0x210 [ 904.569019][ T23] chaoskey_disconnect+0x1b2/0x200 [ 904.574136][ T23] usb_unbind_interface+0x1bd/0x8a0 [ 904.579645][ T23] ? usb_autoresume_device+0x60/0x60 [ 904.585036][ T23] device_release_driver_internal+0x42f/0x500 [ 904.591152][ T23] bus_remove_device+0x2dc/0x4a0 [ 904.596109][ T23] device_del+0x420/0xb20 [ 904.600492][ T23] ? __device_link_del+0x2f0/0x2f0 [ 904.605611][ T23] ? usb_remove_ep_devs+0x3e/0x80 [ 904.610680][ T23] ? remove_intf_ep_devs+0x13f/0x1d0 [ 904.616050][ T23] usb_disable_device+0x211/0x690 [ 904.621177][ T23] usb_disconnect+0x284/0x8d0 [ 904.625858][ T23] hub_event+0x16f2/0x3800 [ 904.630317][ T23] ? hub_port_debounce+0x260/0x260 [ 904.635438][ T23] ? find_held_lock+0x2d/0x110 [ 904.640305][ T23] ? mark_held_locks+0xe0/0xe0 [ 904.645087][ T23] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 904.650666][ T23] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 904.655948][ T23] process_one_work+0x92b/0x1530 [ 904.660984][ T23] ? pwq_dec_nr_in_flight+0x310/0x310 [ 904.666366][ T23] worker_thread+0x7ab/0xe20 [ 904.671362][ T23] ? process_one_work+0x1530/0x1530 [ 904.676578][ T23] kthread+0x318/0x420 [ 904.681131][ T23] ? kthread_create_on_node+0xf0/0xf0 [ 904.686949][ T23] ret_from_fork+0x24/0x30 [ 904.691673][ T23] [ 904.691673][ T23] Showing all locks held in the system: [ 904.699674][ T23] 5 locks held by kworker/0:1/12: [ 904.704760][ T23] #0: ffff8881d8facd28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 [ 904.714966][ T23] #1: ffff8881da227dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 [ 904.725714][ T23] #2: ffff8881d508d200 (&dev->mutex){....}, at: hub_event+0x1b2/0x3800 [ 904.734091][ T23] #3: ffff8881cfca3200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x8d0 [ 904.742751][ T23] #4: ffff8881cfca5190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 904.752987][ T23] 5 locks held by kworker/1:0/17: [ 904.758008][ T23] #0: ffff8881d8facd28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 [ 904.768227][ T23] #1: ffff8881da267dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 [ 904.778982][ T23] #2: ffff8881d50e4200 (&dev->mutex){....}, at: hub_event+0x1b2/0x3800 [ 904.791286][ T23] #3: ffff8881cf519200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x8d0 [ 904.799951][ T23] #4: ffff8881cf51a190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 904.810008][ T23] 1 lock held by khungtaskd/23: [ 904.814849][ T23] #0: ffffffff86cfe8a0 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x269 [ 904.824196][ T23] 5 locks held by kworker/1:2/83: [ 904.829248][ T23] #0: ffff8881d8facd28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 [ 904.839485][ T23] #1: ffff8881d89efdd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 [ 904.850569][ T23] #2: ffff8881d51b8200 (&dev->mutex){....}, at: hub_event+0x1b2/0x3800 [ 904.859075][ T23] #3: ffff8881cb7c2200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x8d0 [ 904.867703][ T23] #4: ffff8881cb7c3190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 904.877743][ T23] 5 locks held by kworker/0:2/102: [ 904.882885][ T23] #0: ffff8881d8facd28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 [ 904.893082][ T23] #1: ffff8881d538fdd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 [ 904.903806][ T23] #2: ffff8881d513a200 (&dev->mutex){....}, at: hub_event+0x1b2/0x3800 [ 904.912191][ T23] #3: ffff8881cece0200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x8d0 [ 904.920886][ T23] #4: ffff8881cece1190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 904.931261][ T23] 1 lock held by rsyslogd/1600: [ 904.936463][ T23] #0: ffff8881d31b45e0 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xe3/0x100 [ 904.945754][ T23] 2 locks held by getty/1690: [ 904.950588][ T23] #0: ffff8881d18e7090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 904.960027][ T23] #1: ffffc900004652e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 904.970105][ T23] 2 locks held by getty/1691: [ 904.974981][ T23] #0: ffff8881d1928090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 904.984516][ T23] #1: ffffc900004452e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 904.995160][ T23] 2 locks held by getty/1692: [ 905.000697][ T23] #0: ffff8881d3196090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.010670][ T23] #1: ffffc900004612e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.020598][ T23] 2 locks held by getty/1693: [ 905.025339][ T23] #0: ffff8881d3197090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.034782][ T23] #1: ffffc900004752e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.044426][ T23] 2 locks held by getty/1694: [ 905.049159][ T23] #0: ffff8881d1af8090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.058433][ T23] #1: ffffc900004712e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.068219][ T23] 2 locks held by getty/1695: [ 905.072933][ T23] #0: ffff8881d3190090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.082793][ T23] #1: ffffc900004552e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.092919][ T23] 2 locks held by getty/1696: [ 905.097742][ T23] #0: ffff8881d219f090 (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 [ 905.107029][ T23] #1: ffffc9000043d2e0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x223/0x1ae0 [ 905.117377][ T23] 5 locks held by kworker/0:0/1735: [ 905.122735][ T23] #0: ffff8881d8facd28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 [ 905.133907][ T23] #1: ffff8881c79cfdd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 [ 905.145298][ T23] #2: ffff8881d5151200 (&dev->mutex){....}, at: hub_event+0x1b2/0x3800 [ 905.154047][ T23] #3: ffff8881cf50f200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x8d0 [ 905.163353][ T23] #4: ffff8881cf1d0190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 905.173938][ T23] 5 locks held by kworker/0:3/1737: [ 905.179336][ T23] #0: ffff8881d8facd28 ((wq_completion)usb_hub_wq){+.+.}, at: process_one_work+0x827/0x1530 [ 905.190004][ T23] #1: ffff8881cf9a7dd0 ((work_completion)(&hub->events)){+.+.}, at: process_one_work+0x85b/0x1530 [ 905.201971][ T23] #2: ffff8881d5103200 (&dev->mutex){....}, at: hub_event+0x1b2/0x3800 [ 905.210988][ T23] #3: ffff8881cfca4200 (&dev->mutex){....}, at: usb_disconnect+0x91/0x8d0 [ 905.220917][ T23] #4: ffff8881cfca7190 (&dev->mutex){....}, at: device_release_driver_internal+0x23/0x500 [ 905.232028][ T23] [ 905.234455][ T23] ============================================= [ 905.234455][ T23] [ 905.243404][ T23] NMI backtrace for cpu 1 [ 905.248066][ T23] CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.4.0-rc6+ #0 [ 905.255506][ T23] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 905.266109][ T23] Call Trace: [ 905.269579][ T23] dump_stack+0xca/0x13e [ 905.273978][ T23] ? x86_vector_activate.cold+0x80/0xdd [ 905.280622][ T23] nmi_cpu_backtrace.cold+0x55/0x96 [ 905.286454][ T23] ? lapic_can_unplug_cpu.cold+0x3b/0x3b [ 905.292638][ T23] nmi_trigger_cpumask_backtrace+0x1b0/0x1c7 [ 905.298716][ T23] watchdog+0x9a4/0xe50 [ 905.303397][ T23] ? reset_hung_task_detector+0x30/0x30 [ 905.309117][ T23] kthread+0x318/0x420 [ 905.313481][ T23] ? kthread_create_on_node+0xf0/0xf0 [ 905.319439][ T23] ret_from_fork+0x24/0x30 [ 905.323919][ T23] Sending NMI from CPU 1 to CPUs 0: [ 905.329236][ C0] NMI backtrace for cpu 0 skipped: idling at default_idle+0x28/0x2e0 [ 905.330166][ T23] Kernel panic - not syncing: hung_task: blocked tasks [ 905.344587][ T23] CPU: 1 PID: 23 Comm: khungtaskd Not tainted 5.4.0-rc6+ #0 [ 905.353822][ T23] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 905.364785][ T23] Call Trace: [ 905.368103][ T23] dump_stack+0xca/0x13e [ 905.372355][ T23] panic+0x2aa/0x6e1 [ 905.376547][ T23] ? add_taint.cold+0x16/0x16 [ 905.382339][ T23] ? cpumask_next+0x1f/0x30 [ 905.386923][ T23] ? printk_safe_flush+0xd9/0x120 [ 905.392631][ T23] ? watchdog+0x9a4/0xe50 [ 905.397786][ T23] ? nmi_trigger_cpumask_backtrace+0x168/0x1c7 [ 905.404530][ T23] watchdog+0x9b5/0xe50 [ 905.408696][ T23] ? reset_hung_task_detector+0x30/0x30 [ 905.414386][ T23] kthread+0x318/0x420 [ 905.418458][ T23] ? kthread_create_on_node+0xf0/0xf0 [ 905.424093][ T23] ret_from_fork+0x24/0x30 [ 905.431413][ T23] Kernel Offset: disabled [ 905.435983][ T23] Rebooting in 86400 seconds..