[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 15.319813][ 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 syzkaller login: [ 39.850850][ T1741] can: request_module (can-proto-0) failed. [ 39.934945][ T1741] can: request_module (can-proto-0) failed. Warning: Permanently added '10.128.0.169' (ECDSA) to the list of known hosts. 2019/09/18 17:12:08 parsed 1 programs 2019/09/18 17:12:08 executed programs: 0 [ 47.873240][ T1868] cgroup1: Unknown subsys name 'perf_event' [ 47.873383][ T1865] cgroup1: Unknown subsys name 'perf_event' [ 47.880008][ T1868] cgroup1: Unknown subsys name 'net_cls' [ 47.890592][ T1869] cgroup1: Unknown subsys name 'perf_event' [ 47.896157][ T1872] cgroup1: Unknown subsys name 'perf_event' [ 47.900972][ T1869] cgroup1: Unknown subsys name 'net_cls' [ 47.906187][ T1873] cgroup1: Unknown subsys name 'perf_event' [ 47.909994][ T1865] cgroup1: Unknown subsys name 'net_cls' [ 47.915317][ T1872] cgroup1: Unknown subsys name 'net_cls' [ 47.927140][ T1873] cgroup1: Unknown subsys name 'net_cls' [ 47.933937][ T1874] cgroup1: Unknown subsys name 'perf_event' [ 47.940807][ T1874] cgroup1: Unknown subsys name 'net_cls' [ 50.982112][ T22] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 51.081967][ T83] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 51.162029][ T103] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 51.162037][ T2838] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 51.192150][ T2861] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 51.211986][ T12] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 51.241987][ T22] usb 3-1: Using ep0 maxpacket: 8 [ 51.332006][ T83] usb 6-1: Using ep0 maxpacket: 8 [ 51.362148][ T22] usb 3-1: config 0 has an invalid interface number: 22 but max is 0 [ 51.370440][ T22] usb 3-1: config 0 has no interface number 0 [ 51.377420][ T22] usb 3-1: config 0 interface 22 altsetting 0 endpoint 0xF has an invalid bInterval 0, changing to 7 [ 51.388359][ T22] usb 3-1: config 0 interface 22 altsetting 0 endpoint 0x83 has an invalid bInterval 0, changing to 7 [ 51.399411][ T22] usb 3-1: New USB device found, idVendor=0a07, idProduct=0082, bcdDevice=b9.42 [ 51.408483][ T22] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.418005][ T22] usb 3-1: config 0 descriptor?? [ 51.422050][ T103] usb 5-1: Using ep0 maxpacket: 8 [ 51.442484][ T2838] usb 1-1: Using ep0 maxpacket: 8 [ 51.452133][ T12] usb 2-1: Using ep0 maxpacket: 8 [ 51.462132][ T83] usb 6-1: config 0 has an invalid interface number: 22 but max is 0 [ 51.470390][ T83] usb 6-1: config 0 has no interface number 0 [ 51.476602][ T2861] usb 4-1: Using ep0 maxpacket: 8 [ 51.485306][ T83] usb 6-1: config 0 interface 22 altsetting 0 endpoint 0xF has an invalid bInterval 0, changing to 7 [ 51.496393][ T83] usb 6-1: config 0 interface 22 altsetting 0 endpoint 0x83 has an invalid bInterval 0, changing to 7 [ 51.507435][ T83] usb 6-1: New USB device found, idVendor=0a07, idProduct=0082, bcdDevice=b9.42 [ 51.516686][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.525449][ T22] adutux 3-1:0.22: ADU130 now attached to /dev/usb/adutux0 [ 51.535434][ T83] usb 6-1: config 0 descriptor?? [ 51.542086][ T103] usb 5-1: config 0 has an invalid interface number: 22 but max is 0 [ 51.550498][ T103] usb 5-1: config 0 has no interface number 0 [ 51.557102][ T103] usb 5-1: config 0 interface 22 altsetting 0 endpoint 0xF has an invalid bInterval 0, changing to 7 [ 51.568147][ T103] usb 5-1: config 0 interface 22 altsetting 0 endpoint 0x83 has an invalid bInterval 0, changing to 7 [ 51.579323][ T103] usb 5-1: New USB device found, idVendor=0a07, idProduct=0082, bcdDevice=b9.42 [ 51.587866][ T83] adutux 6-1:0.22: ADU130 now attached to /dev/usb/adutux1 [ 51.588406][ T103] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.596160][ T2838] usb 1-1: config 0 has an invalid interface number: 22 but max is 0 [ 51.604001][ T12] usb 2-1: config 0 has an invalid interface number: 22 but max is 0 [ 51.611802][ T2838] usb 1-1: config 0 has no interface number 0 [ 51.619890][ T12] usb 2-1: config 0 has no interface number 0 [ 51.630899][ T12] usb 2-1: config 0 interface 22 altsetting 0 endpoint 0xF has an invalid bInterval 0, changing to 7 [ 51.634242][ T2838] usb 1-1: config 0 interface 22 altsetting 0 endpoint 0xF has an invalid bInterval 0, changing to 7 [ 51.643015][ T12] usb 2-1: config 0 interface 22 altsetting 0 endpoint 0x83 has an invalid bInterval 0, changing to 7 [ 51.643051][ T12] usb 2-1: New USB device found, idVendor=0a07, idProduct=0082, bcdDevice=b9.42 [ 51.654004][ T2838] usb 1-1: config 0 interface 22 altsetting 0 endpoint 0x83 has an invalid bInterval 0, changing to 7 [ 51.664936][ T12] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.674432][ T2838] usb 1-1: New USB device found, idVendor=0a07, idProduct=0082, bcdDevice=b9.42 [ 51.697890][ T103] usb 5-1: config 0 descriptor?? [ 51.702967][ T2838] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.703153][ T2861] usb 4-1: config 0 has an invalid interface number: 22 but max is 0 [ 51.703166][ T2861] usb 4-1: config 0 has no interface number 0 [ 51.703201][ T2861] usb 4-1: config 0 interface 22 altsetting 0 endpoint 0xF has an invalid bInterval 0, changing to 7 [ 51.703217][ T2861] usb 4-1: config 0 interface 22 altsetting 0 endpoint 0x83 has an invalid bInterval 0, changing to 7 [ 51.703235][ T2861] usb 4-1: New USB device found, idVendor=0a07, idProduct=0082, bcdDevice=b9.42 [ 51.703245][ T2861] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.704627][ T2861] usb 4-1: config 0 descriptor?? [ 51.714813][ T1751] usb 3-1: USB disconnect, device number 2 [ 51.721600][ T2838] usb 1-1: config 0 descriptor?? [ 51.728573][ T12] usb 2-1: config 0 descriptor?? [ 51.774119][ T2861] adutux 4-1:0.22: ADU130 now attached to /dev/usb/adutux2 [ 51.801072][ T103] adutux 5-1:0.22: ADU130 now attached to /dev/usb/adutux3 [ 51.810380][ T2838] adutux 1-1:0.22: ADU130 now attached to /dev/usb/adutux0 [ 51.827545][ T12] adutux 2-1:0.22: ADU130 now attached to /dev/usb/adutux4 [ 51.850543][ T2861] usb 6-1: USB disconnect, device number 2 [ 51.975064][ T2838] usb 4-1: USB disconnect, device number 2 [ 51.977735][ T12] usb 1-1: USB disconnect, device number 2 [ 51.992814][ T12] ================================================================== [ 51.998997][ T83] usb 5-1: USB disconnect, device number 2 [ 52.001034][ T12] BUG: KASAN: use-after-free in __mutex_unlock_slowpath+0x96/0x670 [ 52.001048][ T12] Read of size 8 at addr ffff8881d5ecea00 by task kworker/0:1/12 [ 52.001051][ T12] [ 52.001068][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0-rc2+ #0 [ 52.032650][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.042716][ T12] Workqueue: usb_hub_wq hub_event [ 52.047731][ T12] Call Trace: [ 52.051019][ T12] dump_stack+0xca/0x13e [ 52.055242][ T12] ? __mutex_unlock_slowpath+0x96/0x670 [ 52.060777][ T12] ? __mutex_unlock_slowpath+0x96/0x670 [ 52.066310][ T12] print_address_description+0x6a/0x32c [ 52.071926][ T12] ? __mutex_unlock_slowpath+0x96/0x670 [ 52.077454][ T12] ? __mutex_unlock_slowpath+0x96/0x670 [ 52.083007][ T12] __kasan_report.cold+0x1a/0x33 [ 52.087936][ T12] ? kfree_const+0x50/0x60 [ 52.092345][ T12] ? __mutex_unlock_slowpath+0x96/0x670 [ 52.097892][ T12] kasan_report+0xe/0x12 [ 52.102118][ T12] check_memory_region+0x128/0x190 [ 52.107309][ T12] __mutex_unlock_slowpath+0x96/0x670 [ 52.112665][ T12] ? wait_for_completion+0x3c0/0x3c0 [ 52.117945][ T12] ? wait_for_completion+0x3c0/0x3c0 [ 52.123358][ T12] adu_disconnect+0x83/0x150 [ 52.127939][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 52.133250][ T12] ? usb_autoresume_device+0x60/0x60 [ 52.138537][ T12] device_release_driver_internal+0x404/0x4c0 [ 52.144649][ T12] bus_remove_device+0x2dc/0x4a0 [ 52.149573][ T12] device_del+0x420/0xb10 [ 52.153894][ T12] ? __device_links_no_driver+0x240/0x240 [ 52.159606][ T12] ? usb_remove_ep_devs+0x3e/0x80 [ 52.164616][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 52.169880][ T12] usb_disable_device+0x211/0x690 [ 52.174900][ T12] usb_disconnect+0x284/0x8d0 [ 52.179566][ T12] hub_event+0x1454/0x3640 [ 52.183971][ T12] ? find_held_lock+0x2d/0x110 [ 52.188713][ T12] ? mark_held_locks+0xe0/0xe0 [ 52.193497][ T12] ? hub_port_debounce+0x260/0x260 [ 52.198788][ T12] process_one_work+0x92b/0x1530 [ 52.203712][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 52.209090][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 52.214263][ T12] worker_thread+0x96/0xe20 [ 52.218876][ T12] ? process_one_work+0x1530/0x1530 [ 52.224199][ T12] kthread+0x318/0x420 [ 52.228262][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 52.233615][ T12] ret_from_fork+0x24/0x30 [ 52.238005][ T12] [ 52.240362][ T12] Allocated by task 2838: [ 52.244719][ T12] save_stack+0x1b/0x80 [ 52.248852][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 52.254460][ T12] adu_probe+0x7d/0x6e0 [ 52.258603][ T12] usb_probe_interface+0x305/0x7a0 [ 52.263688][ T12] really_probe+0x281/0x650 [ 52.268168][ T12] driver_probe_device+0x101/0x1b0 [ 52.273255][ T12] __device_attach_driver+0x1c2/0x220 [ 52.278670][ T12] bus_for_each_drv+0x15c/0x1e0 [ 52.283539][ T12] __device_attach+0x217/0x360 [ 52.288291][ T12] bus_probe_device+0x1e4/0x290 [ 52.293133][ T12] device_add+0xae6/0x16f0 [ 52.297545][ T12] usb_set_configuration+0xdf6/0x1670 [ 52.303268][ T12] generic_probe+0x9d/0xd5 [ 52.307690][ T12] usb_probe_device+0x99/0x100 [ 52.312519][ T12] really_probe+0x281/0x650 [ 52.317067][ T12] driver_probe_device+0x101/0x1b0 [ 52.322177][ T12] __device_attach_driver+0x1c2/0x220 [ 52.327540][ T12] bus_for_each_drv+0x15c/0x1e0 [ 52.332397][ T12] __device_attach+0x217/0x360 [ 52.337142][ T12] bus_probe_device+0x1e4/0x290 [ 52.342076][ T12] device_add+0xae6/0x16f0 [ 52.346661][ T12] usb_new_device.cold+0x6a4/0xe79 [ 52.351767][ T12] hub_event+0x1b5c/0x3640 [ 52.356225][ T12] process_one_work+0x92b/0x1530 [ 52.362031][ T12] worker_thread+0x96/0xe20 [ 52.366519][ T12] kthread+0x318/0x420 [ 52.370582][ T12] ret_from_fork+0x24/0x30 [ 52.374972][ T12] [ 52.377284][ T12] Freed by task 2866: [ 52.381266][ T12] save_stack+0x1b/0x80 [ 52.385428][ T12] __kasan_slab_free+0x130/0x180 [ 52.390591][ T12] kfree+0xe4/0x2f0 [ 52.394574][ T12] adu_release+0x3cc/0x590 [ 52.398993][ T12] __fput+0x2d7/0x840 [ 52.403072][ T12] task_work_run+0x13f/0x1c0 [ 52.407661][ T12] exit_to_usermode_loop+0x1d2/0x200 [ 52.412933][ T12] do_syscall_64+0x45f/0x580 [ 52.417505][ T12] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 52.423379][ T12] [ 52.425716][ T12] The buggy address belongs to the object at ffff8881d5ecea00 [ 52.425716][ T12] which belongs to the cache kmalloc-512 of size 512 [ 52.440152][ T12] The buggy address is located 0 bytes inside of [ 52.440152][ T12] 512-byte region [ffff8881d5ecea00, ffff8881d5ecec00) [ 52.453422][ T12] The buggy address belongs to the page: [ 52.459057][ T12] page:ffffea000757b380 refcount:1 mapcount:0 mapping:ffff8881da002500 index:0xffff8881d5ecf900 compound_mapcount: 0 [ 52.471368][ T12] flags: 0x200000000010200(slab|head) [ 52.476856][ T12] raw: 0200000000010200 ffffea0007570b80 0000000300000003 ffff8881da002500 [ 52.485437][ T12] raw: ffff8881d5ecf900 00000000800c000a 00000001ffffffff 0000000000000000 [ 52.494037][ T12] page dumped because: kasan: bad access detected [ 52.500447][ T12] [ 52.502773][ T12] Memory state around the buggy address: [ 52.508509][ T12] ffff8881d5ece900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.516612][ T12] ffff8881d5ece980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 52.524845][ T12] >ffff8881d5ecea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.532888][ T12] ^ [ 52.536945][ T12] ffff8881d5ecea80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.544991][ T12] ffff8881d5eceb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.553122][ T12] ================================================================== [ 52.561166][ T12] Disabling lock debugging due to kernel taint [ 52.567604][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 52.572603][ T83] usb 6-1: new high-speed USB device number 3 using dummy_hcd [ 52.574208][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.3.0-rc2+ #0 [ 52.574214][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 52.574232][ T12] Workqueue: usb_hub_wq hub_event [ 52.584080][ T22] usb 2-1: USB disconnect, device number 2 [ 52.590415][ T12] Call Trace: [ 52.590433][ T12] dump_stack+0xca/0x13e [ 52.590444][ T12] panic+0x2a3/0x6da [ 52.590458][ T12] ? add_taint.cold+0x16/0x16 [ 52.627550][ T12] ? retint_kernel+0x10/0x10 [ 52.632318][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 52.637340][ T12] ? __mutex_unlock_slowpath+0x96/0x670 [ 52.642884][ T12] end_report+0x43/0x49 [ 52.647030][ T12] ? __mutex_unlock_slowpath+0x96/0x670 [ 52.652564][ T12] __kasan_report.cold+0xd/0x33 [ 52.657404][ T12] ? kfree_const+0x50/0x60 [ 52.661816][ T12] ? __mutex_unlock_slowpath+0x96/0x670 [ 52.667338][ T12] kasan_report+0xe/0x12 [ 52.671556][ T12] check_memory_region+0x128/0x190 [ 52.676652][ T12] __mutex_unlock_slowpath+0x96/0x670 [ 52.682011][ T12] ? wait_for_completion+0x3c0/0x3c0 [ 52.687271][ T12] ? wait_for_completion+0x3c0/0x3c0 [ 52.692539][ T12] adu_disconnect+0x83/0x150 [ 52.697112][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 52.702347][ T12] ? usb_autoresume_device+0x60/0x60 [ 52.707621][ T12] device_release_driver_internal+0x404/0x4c0 [ 52.713816][ T12] bus_remove_device+0x2dc/0x4a0 [ 52.718863][ T12] device_del+0x420/0xb10 [ 52.723189][ T12] ? __device_links_no_driver+0x240/0x240 [ 52.728916][ T12] ? usb_remove_ep_devs+0x3e/0x80 [ 52.733923][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 52.739197][ T12] usb_disable_device+0x211/0x690 [ 52.744204][ T12] usb_disconnect+0x284/0x8d0 [ 52.748858][ T12] hub_event+0x1454/0x3640 [ 52.753264][ T12] ? find_held_lock+0x2d/0x110 [ 52.758008][ T12] ? mark_held_locks+0xe0/0xe0 [ 52.762047][ T2861] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 52.762769][ T12] ? hub_port_debounce+0x260/0x260 [ 52.770288][ T2838] usb 4-1: new high-speed USB device number 3 using dummy_hcd [ 52.775302][ T12] process_one_work+0x92b/0x1530 [ 52.775313][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 52.775327][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 52.775336][ T12] worker_thread+0x96/0xe20 [ 52.775350][ T12] ? process_one_work+0x1530/0x1530 [ 52.807661][ T12] kthread+0x318/0x420 [ 52.811708][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 52.811948][ T83] usb 6-1: Using ep0 maxpacket: 8 [ 52.817068][ T12] ret_from_fork+0x24/0x30 [ 52.818007][ T12] Kernel Offset: disabled [ 52.831691][ T12] Rebooting in 86400 seconds..