[....] Starting enhanced syslogd: rsyslogd[?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 syzkaller login: [ 28.413779][ T1719] can: request_module (can-proto-0) failed. [ 28.799893][ T1719] can: request_module (can-proto-0) failed. [ 28.812230][ T1719] can: request_module (can-proto-7) failed. [ 28.822711][ T1719] can: request_module (can-proto-0) failed. Warning: Permanently added '10.128.15.197' (ECDSA) to the list of known hosts. 2019/11/16 06:07:29 parsed 1 programs 2019/11/16 06:07:29 executed programs: 0 [ 35.660677][ T1864] cgroup1: Unknown subsys name 'perf_event' [ 35.668656][ T1866] cgroup1: Unknown subsys name 'perf_event' [ 35.676107][ T1866] cgroup1: Unknown subsys name 'net_cls' [ 35.679828][ T1870] cgroup1: Unknown subsys name 'perf_event' [ 35.682470][ T1864] cgroup1: Unknown subsys name 'net_cls' [ 35.688881][ T1870] cgroup1: Unknown subsys name 'net_cls' [ 35.694705][ T1872] cgroup1: Unknown subsys name 'perf_event' [ 35.707528][ T1868] cgroup1: Unknown subsys name 'perf_event' [ 35.712860][ T1874] cgroup1: Unknown subsys name 'perf_event' [ 35.716012][ T1868] cgroup1: Unknown subsys name 'net_cls' [ 35.729269][ T1872] cgroup1: Unknown subsys name 'net_cls' [ 35.735962][ T1874] cgroup1: Unknown subsys name 'net_cls' [ 39.166791][ T22] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 39.177280][ T5] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 39.197398][ T100] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 39.205123][ T1759] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 39.226877][ T1761] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 39.246820][ T2875] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 39.416823][ T22] usb 5-1: Using ep0 maxpacket: 16 [ 39.426933][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 39.437011][ T100] usb 1-1: Using ep0 maxpacket: 16 [ 39.446770][ T1759] usb 6-1: Using ep0 maxpacket: 16 [ 39.486812][ T1761] usb 4-1: Using ep0 maxpacket: 16 [ 39.486833][ T2875] usb 2-1: Using ep0 maxpacket: 16 [ 39.537132][ T22] usb 5-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 39.547164][ T22] usb 5-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 39.556194][ T22] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.556952][ T5] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 39.564761][ T100] usb 1-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 39.574223][ T5] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 39.584002][ T100] usb 1-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 39.593028][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.602178][ T100] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.616570][ T5] usb 3-1: config 0 descriptor?? [ 39.618261][ T1759] usb 6-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 39.633100][ T1759] usb 6-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 39.642280][ T1759] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.647091][ T2865] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 39.653434][ T1759] usb 6-1: config 0 descriptor?? [ 39.658268][ T1761] usb 4-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 39.663303][ T22] usb 5-1: config 0 descriptor?? [ 39.672809][ T1761] usb 4-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 39.672823][ T1761] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.684064][ T1761] usb 4-1: config 0 descriptor?? [ 39.687667][ T100] usb 1-1: config 0 descriptor?? [ 39.706865][ T2872] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 39.716864][ T2881] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 39.724391][ T2862] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 39.732069][ T2869] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 39.746888][ T2875] usb 2-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 39.757879][ T2875] usb 2-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 39.768005][ T2875] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 39.779050][ T2875] usb 2-1: config 0 descriptor?? [ 39.796826][ T2885] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 39.916872][ T5] usb 3-1: string descriptor 0 read error: -71 [ 39.962135][ T5] usb 3-1: USB disconnect, device number 2 [ 39.966922][ T1759] usb 6-1: string descriptor 0 read error: -71 [ 39.978694][ T2889] hwrng: no data available [ 39.996971][ T22] usb 5-1: string descriptor 0 read error: -71 [ 40.003812][ T100] usb 1-1: string descriptor 0 read error: -71 [ 40.006818][ T1761] usb 4-1: string descriptor 0 read error: -71 [ 40.014633][ T1759] usb 6-1: USB disconnect, device number 2 [ 40.027805][ T100] chaoskey 1-1:0.0: Unable to register with hwrng [ 40.034716][ T1761] chaoskey 4-1:0.0: Unable to register with hwrng [ 40.035264][ T22] chaoskey 5-1:0.0: Unable to register with hwrng [ 40.045899][ T1761] usb 4-1: USB disconnect, device number 2 [ 40.058754][ T100] usb 1-1: USB disconnect, device number 2 [ 40.067068][ T2875] usb 2-1: string descriptor 0 read error: -71 [ 40.081678][ T22] usb 5-1: USB disconnect, device number 2 [ 40.089360][ T2875] usb 2-1: USB disconnect, device number 2 [ 40.726778][ T22] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 40.726797][ T1761] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 40.756801][ T100] usb 4-1: new high-speed USB device number 3 using dummy_hcd [ 40.966772][ T1761] usb 1-1: Using ep0 maxpacket: 16 [ 40.986751][ T22] usb 5-1: Using ep0 maxpacket: 16 [ 40.996882][ T100] usb 4-1: Using ep0 maxpacket: 16 [ 41.086837][ T1761] usb 1-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 41.096771][ T1761] usb 1-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 41.106226][ T1761] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 41.106925][ T22] usb 5-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 41.115814][ T1761] usb 1-1: config 0 descriptor?? [ 41.124177][ T22] usb 5-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 41.138157][ T22] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 41.146205][ T100] usb 4-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 41.156094][ T100] usb 4-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 41.156885][ T2869] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 41.165158][ T100] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 41.181795][ T100] usb 4-1: config 0 descriptor?? [ 41.187964][ T22] usb 5-1: config 0 descriptor?? [ 41.206845][ T2862] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 41.207045][ T2881] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 41.446824][ T1761] usb 1-1: string descriptor 0 read error: -71 [ 41.466819][ T22] usb 5-1: string descriptor 0 read error: -71 [ 41.474923][ T100] usb 4-1: string descriptor 0 read error: -71 [ 41.483243][ T22] chaoskey 5-1:0.0: Unable to register with hwrng [ 41.484954][ T1761] usb 1-1: USB disconnect, device number 3 [ 41.496148][ T100] chaoskey 4-1:0.0: Unable to register with hwrng [ 41.506870][ T22] usb 5-1: USB disconnect, device number 3 [ 41.514456][ T100] usb 4-1: USB disconnect, device number 3 2019/11/16 06:07:36 executed programs: 6 [ 42.166779][ T2883] usb 5-1: new high-speed USB device number 4 using dummy_hcd [ 42.216780][ T2901] usb 4-1: new high-speed USB device number 4 using dummy_hcd [ 42.406783][ T2883] usb 5-1: Using ep0 maxpacket: 16 [ 42.456758][ T2901] usb 4-1: Using ep0 maxpacket: 16 [ 42.526898][ T2883] usb 5-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 42.537121][ T2883] usb 5-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 42.546153][ T2883] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 42.555233][ T2883] usb 5-1: config 0 descriptor?? [ 42.576877][ T2900] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 42.606919][ T2901] usb 4-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 42.616896][ T2901] usb 4-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 42.626156][ T2901] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 42.635571][ T2901] usb 4-1: config 0 descriptor?? [ 42.656861][ T2913] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 42.836866][ T2883] usb 5-1: string descriptor 0 read error: -71 [ 42.860787][ T2883] usb 5-1: USB disconnect, device number 4 [ 42.916854][ T2901] usb 4-1: string descriptor 0 read error: -71 [ 42.950961][ T2901] usb 4-1: USB disconnect, device number 4 2019/11/16 06:07:42 executed programs: 18 [ 50.796821][ T5] usb 3-1: new high-speed USB device number 3 using dummy_hcd [ 51.466755][ T5] usb 3-1: device not accepting address 3, error -71 [ 51.836765][ T5] usb 3-1: new high-speed USB device number 4 using dummy_hcd [ 52.076784][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 52.196893][ T5] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 52.207039][ T5] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 52.216657][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 52.225571][ T5] usb 3-1: config 0 descriptor?? [ 52.246854][ T2964] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 52.516862][ T5] usb 3-1: string descriptor 0 read error: -71 [ 52.538707][ T5] usb 3-1: USB disconnect, device number 4 [ 52.556843][ T2975] hwrng: no data available 2019/11/16 06:07:48 executed programs: 30 2019/11/16 06:07:54 executed programs: 42 [ 62.956834][ T5] usb 3-1: new high-speed USB device number 5 using dummy_hcd [ 63.396755][ T5] usb 3-1: device descriptor read/64, error -71 [ 63.756749][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 63.876836][ T5] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 63.886794][ T5] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 63.895822][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 63.905869][ T5] usb 3-1: config 0 descriptor?? [ 63.926840][ T3044] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 64.186858][ T5] usb 3-1: string descriptor 0 read error: -71 [ 64.208855][ T5] usb 3-1: USB disconnect, device number 5 [ 64.236846][ T3049] hwrng: no data available 2019/11/16 06:08:00 executed programs: 54 2019/11/16 06:08:06 executed programs: 66 [ 75.346780][ T5] usb 3-1: new high-speed USB device number 6 using dummy_hcd [ 75.586767][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 75.716837][ T5] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 75.726969][ T5] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 75.735982][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 75.745075][ T5] usb 3-1: config 0 descriptor?? [ 75.766838][ T3113] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 76.046871][ T5] usb 3-1: string descriptor 0 read error: -71 [ 76.071092][ T5] usb 3-1: USB disconnect, device number 6 [ 76.086859][ T3123] hwrng: no data available 2019/11/16 06:08:12 executed programs: 78 2019/11/16 06:08:18 executed programs: 90 [ 86.646808][ T5] usb 3-1: new high-speed USB device number 7 using dummy_hcd [ 86.886755][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 87.017070][ T5] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 87.027297][ T5] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 87.036337][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 87.058117][ T5] usb 3-1: config 0 descriptor?? [ 87.107056][ T5] usb 3-1: can't set config #0, error -71 [ 87.115710][ T5] usb 3-1: USB disconnect, device number 7 [ 87.466819][ T5] usb 3-1: new high-speed USB device number 8 using dummy_hcd [ 87.706754][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 87.826849][ T5] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 87.836789][ T5] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 87.845814][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 87.854794][ T5] usb 3-1: config 0 descriptor?? [ 87.876811][ T3193] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 88.136900][ T5] usb 3-1: string descriptor 0 read error: -71 [ 88.169003][ T5] usb 3-1: USB disconnect, device number 8 [ 88.187032][ T3197] hwrng: no data available 2019/11/16 06:08:24 executed programs: 102 2019/11/16 06:08:30 executed programs: 114 [ 98.806781][ T5] usb 3-1: new high-speed USB device number 9 using dummy_hcd [ 99.046771][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 99.126850][ T5] usb 3-1: device descriptor read/all, error -71 [ 99.496746][ T5] usb 3-1: new high-speed USB device number 10 using dummy_hcd [ 99.736762][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 99.856843][ T5] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 99.866799][ T5] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 99.875825][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 99.885266][ T5] usb 3-1: config 0 descriptor?? [ 99.906834][ T3263] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 100.166902][ T5] usb 3-1: string descriptor 0 read error: -71 [ 100.191127][ T5] usb 3-1: USB disconnect, device number 10 [ 100.206903][ T3271] hwrng: no data available 2019/11/16 06:08:36 executed programs: 126 2019/11/16 06:08:42 executed programs: 138 [ 110.956778][ T5] usb 3-1: new high-speed USB device number 11 using dummy_hcd [ 111.636754][ T5] usb 3-1: device not accepting address 11, error -71 [ 112.006774][ T5] usb 3-1: new high-speed USB device number 12 using dummy_hcd [ 112.246738][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 112.366835][ T5] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 112.376791][ T5] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 112.385902][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 112.394910][ T5] usb 3-1: config 0 descriptor?? [ 112.416878][ T3338] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 112.676960][ T5] usb 3-1: string descriptor 0 read error: -71 [ 112.700970][ T5] usb 3-1: USB disconnect, device number 12 [ 112.726998][ T3345] hwrng: no data available 2019/11/16 06:08:48 executed programs: 150 2019/11/16 06:08:54 executed programs: 162 [ 123.117297][ T5] usb 3-1: new high-speed USB device number 13 using dummy_hcd [ 123.546766][ T5] usb 3-1: device descriptor read/64, error -71 [ 123.906738][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 124.026924][ T5] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 124.038212][ T5] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 124.047546][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 124.056571][ T5] usb 3-1: config 0 descriptor?? [ 124.076858][ T3410] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 124.346922][ T5] usb 3-1: string descriptor 0 read error: -71 [ 124.378685][ T5] usb 3-1: USB disconnect, device number 13 [ 125.076763][ T100] usb 3-1: new high-speed USB device number 14 using dummy_hcd [ 125.316771][ T100] usb 3-1: Using ep0 maxpacket: 16 [ 125.436869][ T100] usb 3-1: config 0 interface 0 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 73 [ 125.447342][ T100] usb 3-1: New USB device found, idVendor=1d50, idProduct=60c6, bcdDevice=1a.d7 [ 125.457957][ T100] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 125.466827][ T100] usb 3-1: config 0 descriptor?? [ 125.486813][ T3410] raw: raw_ioctl_ep_enable: fail, usb_ep_enable returned -22 [ 125.746924][ T100] usb 3-1: string descriptor 0 read error: -71 [ 125.768153][ T100] usb 3-1: USB disconnect, device number 14 [ 125.774576][ T100] ================================================================== [ 125.782823][ T100] BUG: KASAN: use-after-free in refcount_inc_not_zero_checked+0x72/0x1e0 [ 125.791317][ T100] Read of size 4 at addr ffff8881d91ec820 by task kworker/1:2/100 [ 125.799124][ T100] [ 125.801454][ T100] CPU: 1 PID: 100 Comm: kworker/1:2 Not tainted 5.4.0-rc6+ #0 [ 125.809059][ T100] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 125.819123][ T100] Workqueue: usb_hub_wq hub_event [ 125.824128][ T100] Call Trace: [ 125.827415][ T100] dump_stack+0xca/0x13e [ 125.831643][ T100] ? refcount_inc_not_zero_checked+0x72/0x1e0 [ 125.837703][ T100] ? refcount_inc_not_zero_checked+0x72/0x1e0 [ 125.844044][ T100] print_address_description.constprop.0+0x36/0x50 [ 125.850550][ T100] ? refcount_inc_not_zero_checked+0x72/0x1e0 [ 125.856720][ T100] ? refcount_inc_not_zero_checked+0x72/0x1e0 [ 125.862800][ T100] __kasan_report.cold+0x1a/0x33 [ 125.867732][ T100] ? refcount_inc_not_zero_checked+0x72/0x1e0 [ 125.873914][ T100] kasan_report+0xe/0x20 [ 125.878176][ T100] check_memory_region+0x128/0x190 [ 125.883278][ T100] refcount_inc_not_zero_checked+0x72/0x1e0 [ 125.889171][ T100] ? refcount_dec_and_mutex_lock+0x80/0x80 [ 125.895074][ T100] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 125.900751][ T100] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 125.906037][ T100] refcount_inc_checked+0x12/0x60 [ 125.911060][ T100] kthread_stop+0x6c/0x610 [ 125.915473][ T100] hwrng_unregister+0x190/0x210 [ 125.920400][ T100] chaoskey_disconnect+0x1b2/0x200 [ 125.925499][ T100] usb_unbind_interface+0x1bd/0x8a0 [ 125.930699][ T100] ? usb_autoresume_device+0x60/0x60 [ 125.935989][ T100] device_release_driver_internal+0x42f/0x500 [ 125.942050][ T100] bus_remove_device+0x2dc/0x4a0 [ 125.948044][ T100] device_del+0x420/0xb20 [ 125.952404][ T100] ? __device_link_del+0x2f0/0x2f0 [ 125.957515][ T100] ? usb_remove_ep_devs+0x3e/0x80 [ 125.962761][ T100] ? remove_intf_ep_devs+0x13f/0x1d0 [ 125.968673][ T100] usb_disable_device+0x211/0x690 [ 125.973702][ T100] usb_disconnect+0x284/0x8d0 [ 125.978412][ T100] hub_event+0x16f2/0x3800 [ 125.982825][ T100] ? hub_port_debounce+0x260/0x260 [ 125.987954][ T100] ? find_held_lock+0x2d/0x110 [ 125.992713][ T100] ? mark_held_locks+0xe0/0xe0 [ 125.997651][ T100] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 126.003195][ T100] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 126.008463][ T100] process_one_work+0x92b/0x1530 [ 126.013483][ T100] ? pwq_dec_nr_in_flight+0x310/0x310 [ 126.018950][ T100] ? do_raw_spin_lock+0x11a/0x280 [ 126.024096][ T100] worker_thread+0x7ab/0xe20 [ 126.028745][ T100] ? process_one_work+0x1530/0x1530 [ 126.034120][ T100] kthread+0x318/0x420 [ 126.038240][ T100] ? kthread_create_on_node+0xf0/0xf0 [ 126.043621][ T100] ret_from_fork+0x24/0x30 [ 126.048050][ T100] [ 126.050414][ T100] Allocated by task 2: [ 126.054488][ T100] save_stack+0x1b/0x80 [ 126.058644][ T100] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 126.065325][ T100] kmem_cache_alloc_node+0xdc/0x310 [ 126.070507][ T100] copy_process+0x4201/0x6470 [ 126.075175][ T100] _do_fork+0x129/0xec0 [ 126.079337][ T100] kernel_thread+0xaa/0xe0 [ 126.083758][ T100] kthreadd+0x4a2/0x680 [ 126.087919][ T100] ret_from_fork+0x24/0x30 [ 126.092331][ T100] [ 126.094657][ T100] Freed by task 0: 2019/11/16 06:09:00 executed programs: 174 [ 126.098383][ T100] save_stack+0x1b/0x80 [ 126.102542][ T100] __kasan_slab_free+0x130/0x180 [ 126.107493][ T100] kmem_cache_free+0xb9/0x380 [ 126.112172][ T100] __put_task_struct+0x1e2/0x4c0 [ 126.117115][ T100] delayed_put_task_struct+0x1b4/0x2c0 [ 126.122579][ T100] rcu_core+0x630/0x1ca0 [ 126.126825][ T100] __do_softirq+0x221/0x912 [ 126.131324][ T100] [ 126.133660][ T100] The buggy address belongs to the object at ffff8881d91ec800 [ 126.133660][ T100] which belongs to the cache task_struct of size 5888 [ 126.147817][ T100] The buggy address is located 32 bytes inside of [ 126.147817][ T100] 5888-byte region [ffff8881d91ec800, ffff8881d91edf00) [ 126.161094][ T100] The buggy address belongs to the page: [ 126.166763][ T100] page:ffffea0007647a00 refcount:1 mapcount:0 mapping:ffff8881da116000 index:0xffff8881d91e9800 compound_mapcount: 0 [ 126.179011][ T100] flags: 0x200000000010200(slab|head) [ 126.184413][ T100] raw: 0200000000010200 0000000000000000 0000000100000001 ffff8881da116000 [ 126.193006][ T100] raw: ffff8881d91e9800 0000000080050003 00000001ffffffff 0000000000000000 [ 126.201587][ T100] page dumped because: kasan: bad access detected [ 126.207997][ T100] [ 126.210316][ T100] Memory state around the buggy address: [ 126.215937][ T100] ffff8881d91ec700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 126.224069][ T100] ffff8881d91ec780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 126.232124][ T100] >ffff8881d91ec800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.240173][ T100] ^ [ 126.245261][ T100] ffff8881d91ec880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.253315][ T100] ffff8881d91ec900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.261358][ T100] ================================================================== [ 126.269395][ T100] Disabling lock debugging due to kernel taint [ 126.275717][ T100] Kernel panic - not syncing: panic_on_warn set ... [ 126.282310][ T100] CPU: 1 PID: 100 Comm: kworker/1:2 Tainted: G B 5.4.0-rc6+ #0 [ 126.291332][ T100] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 126.301389][ T100] Workqueue: usb_hub_wq hub_event [ 126.306503][ T100] Call Trace: [ 126.309787][ T100] dump_stack+0xca/0x13e [ 126.314080][ T100] panic+0x2aa/0x6e1 [ 126.317964][ T100] ? add_taint.cold+0x16/0x16 [ 126.322630][ T100] ? retint_kernel+0x10/0x10 [ 126.327218][ T100] ? trace_hardirqs_on+0x55/0x1e0 [ 126.332222][ T100] ? refcount_inc_not_zero_checked+0x72/0x1e0 [ 126.338293][ T100] end_report+0x43/0x49 [ 126.342564][ T100] ? refcount_inc_not_zero_checked+0x72/0x1e0 [ 126.348613][ T100] __kasan_report.cold+0xd/0x33 [ 126.353450][ T100] ? refcount_inc_not_zero_checked+0x72/0x1e0 [ 126.359512][ T100] kasan_report+0xe/0x20 [ 126.363754][ T100] check_memory_region+0x128/0x190 [ 126.368852][ T100] refcount_inc_not_zero_checked+0x72/0x1e0 [ 126.374736][ T100] ? refcount_dec_and_mutex_lock+0x80/0x80 [ 126.380541][ T100] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 126.386069][ T100] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 126.391379][ T100] refcount_inc_checked+0x12/0x60 [ 126.396556][ T100] kthread_stop+0x6c/0x610 [ 126.400963][ T100] hwrng_unregister+0x190/0x210 [ 126.405979][ T100] chaoskey_disconnect+0x1b2/0x200 [ 126.411074][ T100] usb_unbind_interface+0x1bd/0x8a0 [ 126.416609][ T100] ? usb_autoresume_device+0x60/0x60 [ 126.421879][ T100] device_release_driver_internal+0x42f/0x500 [ 126.427950][ T100] bus_remove_device+0x2dc/0x4a0 [ 126.432869][ T100] device_del+0x420/0xb20 [ 126.437207][ T100] ? __device_link_del+0x2f0/0x2f0 [ 126.443400][ T100] ? usb_remove_ep_devs+0x3e/0x80 [ 126.448549][ T100] ? remove_intf_ep_devs+0x13f/0x1d0 [ 126.453936][ T100] usb_disable_device+0x211/0x690 [ 126.458948][ T100] usb_disconnect+0x284/0x8d0 [ 126.463711][ T100] hub_event+0x16f2/0x3800 [ 126.468138][ T100] ? hub_port_debounce+0x260/0x260 [ 126.473452][ T100] ? find_held_lock+0x2d/0x110 [ 126.478200][ T100] ? mark_held_locks+0xe0/0xe0 [ 126.482954][ T100] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 126.488493][ T100] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 126.493771][ T100] process_one_work+0x92b/0x1530 [ 126.498693][ T100] ? pwq_dec_nr_in_flight+0x310/0x310 [ 126.504046][ T100] ? do_raw_spin_lock+0x11a/0x280 [ 126.509051][ T100] worker_thread+0x7ab/0xe20 [ 126.513623][ T100] ? process_one_work+0x1530/0x1530 [ 126.518832][ T100] kthread+0x318/0x420 [ 126.522892][ T100] ? kthread_create_on_node+0xf0/0xf0 [ 126.528242][ T100] ret_from_fork+0x24/0x30 [ 126.532696][ T100] Kernel Offset: disabled [ 126.537004][ T100] Rebooting in 86400 seconds..