[ 83.156373][ T31] audit: type=1800 audit(1564399537.210:25): pid=12354 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 83.179797][ T31] audit: type=1800 audit(1564399537.230:26): pid=12354 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 83.216799][ T31] audit: type=1800 audit(1564399537.260:27): pid=12354 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [ 84.306365][T12425] sshd (12425) used greatest stack depth: 54352 bytes left [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.35' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 92.362623][T12505] IPVS: ftp: loaded support on port[0] = 21 [ 92.673858][ T3040] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 92.913868][ T3040] usb 1-1: Using ep0 maxpacket: 8 [ 93.034006][ T3040] usb 1-1: config 0 has an invalid interface number: 225 but max is 0 [ 93.042387][ T3040] usb 1-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config [ 93.052648][ T3040] usb 1-1: config 0 has no interface number 0 [ 93.058895][ T3040] usb 1-1: config 0 interface 225 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 29 [ 93.069592][ T3040] usb 1-1: New USB device found, idVendor=04d8, idProduct=0a30, bcdDevice=33.30 [ 93.078782][ T3040] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 93.088492][ T3040] usb 1-1: config 0 descriptor?? [ 93.141210][ T3040] mcba_usb 1-1:0.225 can0: failed tx_urb -2 [ 93.147480][ T3040] mcba_usb 1-1:0.225 can0: Failed to send cmd (169) [ 93.157194][ T3040] mcba_usb 1-1:0.225 can0: failed tx_urb -2 [ 93.163219][ T3040] mcba_usb 1-1:0.225 can0: Failed to send cmd (169) [ 93.170013][ T3040] mcba_usb 1-1:0.225: Microchip CAN BUS Analyzer connected [ 93.342062][ T12] usb 1-1: USB disconnect, device number 2 [ 93.348917][ T12] mcba_usb 1-1:0.225 can0: device disconnected [ 93.417236][ T12] ================================================================== [ 93.425363][ T12] BUG: KMSAN: uninit-value in usb_kill_anchored_urbs+0x358/0x3b0 [ 93.433333][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.2.0+ #15 [ 93.440419][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.450466][ T12] Workqueue: usb_hub_wq hub_event [ 93.455486][ T12] Call Trace: [ 93.458767][ T12] dump_stack+0x191/0x1f0 [ 93.463104][ T12] kmsan_report+0x162/0x2d0 [ 93.467601][ T12] __msan_warning+0x75/0xe0 [ 93.472188][ T12] usb_kill_anchored_urbs+0x358/0x3b0 [ 93.477551][ T12] mcba_usb_disconnect+0x135/0x1a0 [ 93.482657][ T12] ? mcba_usb_probe+0x22b0/0x22b0 [ 93.487670][ T12] usb_unbind_interface+0x3a2/0xdd0 [ 93.492866][ T12] ? usb_driver_release_interface+0x2a0/0x2a0 [ 93.498924][ T12] device_release_driver_internal+0x911/0xd20 [ 93.504994][ T12] device_release_driver+0x4b/0x60 [ 93.511612][ T12] bus_remove_device+0x4bf/0x670 [ 93.516550][ T12] device_del+0xc75/0x1c50 [ 93.520969][ T12] ? usb_remove_ep_devs+0x8d/0xe0 [ 93.526003][ T12] usb_disable_device+0x567/0x1150 [ 93.531108][ T12] usb_disconnect+0x51e/0xd60 [ 93.535784][ T12] hub_event+0x4003/0x7320 [ 93.540224][ T12] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 93.546102][ T12] ? led_work+0x720/0x720 [ 93.550413][ T12] ? led_work+0x720/0x720 [ 93.554739][ T12] process_one_work+0x1572/0x1f00 [ 93.559863][ T12] worker_thread+0x111b/0x2460 [ 93.564633][ T12] kthread+0x4b5/0x4f0 [ 93.568689][ T12] ? process_one_work+0x1f00/0x1f00 [ 93.573876][ T12] ? kthread_blkcg+0xf0/0xf0 [ 93.578481][ T12] ret_from_fork+0x35/0x40 [ 93.582883][ T12] [ 93.585190][ T12] Uninit was created at: [ 93.589417][ T12] kmsan_internal_poison_shadow+0x53/0xa0 [ 93.595119][ T12] kmsan_slab_free+0x8d/0x100 [ 93.599774][ T12] kfree+0x4b2/0x2960 [ 93.603740][ T12] kvfree+0xe4/0x100 [ 93.607621][ T12] netdev_freemem+0x6b/0x90 [ 93.612105][ T12] netdev_release+0xab/0xf0 [ 93.616601][ T12] device_release+0xe2/0x380 [ 93.621176][ T12] kobject_put+0x38d/0x480 [ 93.625575][ T12] put_device+0x51/0x70 [ 93.629712][ T12] free_netdev+0x50e/0x540 [ 93.634111][ T12] free_candev+0x37/0x40 [ 93.638335][ T12] mcba_usb_disconnect+0x11b/0x1a0 [ 93.643962][ T12] usb_unbind_interface+0x3a2/0xdd0 [ 93.649147][ T12] device_release_driver_internal+0x911/0xd20 [ 93.655317][ T12] device_release_driver+0x4b/0x60 [ 93.660411][ T12] bus_remove_device+0x4bf/0x670 [ 93.665342][ T12] device_del+0xc75/0x1c50 [ 93.669740][ T12] usb_disable_device+0x567/0x1150 [ 93.674830][ T12] usb_disconnect+0x51e/0xd60 [ 93.679488][ T12] hub_event+0x4003/0x7320 [ 93.683889][ T12] process_one_work+0x1572/0x1f00 [ 93.688897][ T12] worker_thread+0x111b/0x2460 [ 93.693650][ T12] kthread+0x4b5/0x4f0 [ 93.697702][ T12] ret_from_fork+0x35/0x40 [ 93.702096][ T12] ================================================================== [ 93.710137][ T12] Disabling lock debugging due to kernel taint [ 93.716270][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 93.722844][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.2.0+ #15 [ 93.731321][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 93.741370][ T12] Workqueue: usb_hub_wq hub_event [ 93.746387][ T12] Call Trace: [ 93.749754][ T12] dump_stack+0x191/0x1f0 [ 93.754077][ T12] panic+0x3c9/0xc1e [ 93.757983][ T12] kmsan_report+0x2ca/0x2d0 [ 93.762493][ T12] __msan_warning+0x75/0xe0 [ 93.767084][ T12] usb_kill_anchored_urbs+0x358/0x3b0 [ 93.772535][ T12] mcba_usb_disconnect+0x135/0x1a0 [ 93.777633][ T12] ? mcba_usb_probe+0x22b0/0x22b0 [ 93.782642][ T12] usb_unbind_interface+0x3a2/0xdd0 [ 93.787837][ T12] ? usb_driver_release_interface+0x2a0/0x2a0 [ 93.793898][ T12] device_release_driver_internal+0x911/0xd20 [ 93.799984][ T12] device_release_driver+0x4b/0x60 [ 93.805108][ T12] bus_remove_device+0x4bf/0x670 [ 93.810299][ T12] device_del+0xc75/0x1c50 [ 93.814738][ T12] ? usb_remove_ep_devs+0x8d/0xe0 [ 93.819755][ T12] usb_disable_device+0x567/0x1150 [ 93.824864][ T12] usb_disconnect+0x51e/0xd60 [ 93.829541][ T12] hub_event+0x4003/0x7320 [ 93.833993][ T12] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 93.839885][ T12] ? led_work+0x720/0x720 [ 93.844203][ T12] ? led_work+0x720/0x720 [ 93.848886][ T12] process_one_work+0x1572/0x1f00 [ 93.853915][ T12] worker_thread+0x111b/0x2460 [ 93.858710][ T12] kthread+0x4b5/0x4f0 [ 93.862768][ T12] ? process_one_work+0x1f00/0x1f00 [ 93.867964][ T12] ? kthread_blkcg+0xf0/0xf0 [ 93.872543][ T12] ret_from_fork+0x35/0x40 [ 93.878206][ T12] Kernel Offset: disabled [ 93.882532][ T12] Rebooting in 86400 seconds..