[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 86.493458][ T30] audit: type=1800 audit(1559638314.546:25): pid=11605 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 86.522644][ T30] audit: type=1800 audit(1559638314.566:26): pid=11605 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 86.566521][ T30] audit: type=1800 audit(1559638314.596:27): pid=11605 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. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 90.814438][T11743] sshd (11743) used greatest stack depth: 53664 bytes left Warning: Permanently added '10.128.0.121' (ECDSA) to the list of known hosts. executing program [ 98.502040][ T3353] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 98.742017][ T3353] usb 1-1: Using ep0 maxpacket: 8 [ 98.862007][ T3353] usb 1-1: config 0 has an invalid interface number: 186 but max is 0 [ 98.870259][ T3353] usb 1-1: config 0 has no interface number 0 [ 98.876566][ T3353] usb 1-1: New USB device found, idVendor=04e8, idProduct=a100, bcdDevice=40.e6 [ 98.885747][ T3353] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 98.895570][ T3353] usb 1-1: config 0 descriptor?? executing program [ 99.132051][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0002: -71 [ 99.162103][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0002: -71 [ 99.412076][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 99.562129][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to read reg index 0x0006: -71 [ 99.592020][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0005: -71 [ 99.622058][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 99.651981][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 99.682034][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 99.712154][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 99.742004][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0002: -71 [ 99.771982][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 99.802099][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0002: -71 [ 99.832055][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to read reg index 0x0001: -71 [ 99.862124][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0001: -71 [ 99.891993][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x001f: -71 [ 99.922144][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x0019: -71 [ 99.951996][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x001f: -71 [ 99.982086][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x000d: -71 [ 100.012052][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x000e: -71 [ 100.041968][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x000d: -71 [ 100.072011][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to read reg index 0x000e: -71 [ 100.102069][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x000d: -71 [ 100.131964][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x000e: -71 [ 100.162158][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x000d: -71 [ 100.191990][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to write reg index 0x000e: -71 [ 100.222152][ T3353] ax88179_178a 1-1:0.186 (unnamed net_device) (uninitialized): Failed to read reg index 0x0000: -71 [ 100.233484][ T3353] ================================================================== [ 100.241557][ T3353] BUG: KMSAN: uninit-value in mii_nway_restart+0x141/0x260 [ 100.248759][ T3353] CPU: 1 PID: 3353 Comm: kworker/1:2 Not tainted 5.1.0+ #1 [ 100.255985][ T3353] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.266184][ T3353] Workqueue: usb_hub_wq hub_event [ 100.271299][ T3353] Call Trace: [ 100.274613][ T3353] dump_stack+0x191/0x1f0 [ 100.279037][ T3353] kmsan_report+0x130/0x2a0 [ 100.283546][ T3353] __msan_warning+0x75/0xe0 [ 100.288260][ T3353] mii_nway_restart+0x141/0x260 [ 100.293133][ T3353] ax88179_bind+0xee3/0x1a10 [ 100.297944][ T3353] ? ax88179_resume+0x10f0/0x10f0 [ 100.303179][ T3353] usbnet_probe+0x10f5/0x3940 [ 100.317110][ T3353] ? usbnet_disconnect+0x660/0x660 [ 100.322763][ T3353] usb_probe_interface+0xd66/0x1320 [ 100.327997][ T3353] ? usb_register_driver+0x7d0/0x7d0 [ 100.333377][ T3353] really_probe+0xdae/0x1d80 [ 100.339880][ T3353] driver_probe_device+0x1b3/0x4f0 [ 100.345030][ T3353] __device_attach_driver+0x5b8/0x790 [ 100.350422][ T3353] bus_for_each_drv+0x28e/0x3b0 [ 100.355367][ T3353] ? deferred_probe_work_func+0x400/0x400 [ 100.361128][ T3353] __device_attach+0x454/0x730 [ 100.365906][ T3353] device_initial_probe+0x4a/0x60 [ 100.370930][ T3353] bus_probe_device+0x137/0x390 [ 100.375805][ T3353] device_add+0x288d/0x30e0 [ 100.380395][ T3353] usb_set_configuration+0x30dc/0x3750 [ 100.385905][ T3353] generic_probe+0xe7/0x280 [ 100.390497][ T3353] ? usb_choose_configuration+0xae0/0xae0 [ 100.396243][ T3353] usb_probe_device+0x14c/0x200 [ 100.401118][ T3353] ? usb_register_device_driver+0x470/0x470 [ 100.407017][ T3353] really_probe+0xdae/0x1d80 [ 100.411839][ T3353] driver_probe_device+0x1b3/0x4f0 [ 100.416986][ T3353] __device_attach_driver+0x5b8/0x790 [ 100.422470][ T3353] bus_for_each_drv+0x28e/0x3b0 [ 100.427323][ T3353] ? deferred_probe_work_func+0x400/0x400 [ 100.433229][ T3353] __device_attach+0x454/0x730 [ 100.439137][ T3353] device_initial_probe+0x4a/0x60 [ 100.444465][ T3353] bus_probe_device+0x137/0x390 [ 100.449412][ T3353] device_add+0x288d/0x30e0 [ 100.453942][ T3353] usb_new_device+0x23e5/0x2ff0 [ 100.458834][ T3353] hub_event+0x48d1/0x7290 [ 100.463328][ T3353] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 100.469229][ T3353] ? led_work+0x720/0x720 [ 100.473644][ T3353] ? led_work+0x720/0x720 [ 100.478061][ T3353] process_one_work+0x1572/0x1f00 [ 100.483143][ T3353] worker_thread+0x111b/0x2460 [ 100.488073][ T3353] kthread+0x4b5/0x4f0 [ 100.492287][ T3353] ? process_one_work+0x1f00/0x1f00 [ 100.498078][ T3353] ? kthread_blkcg+0xf0/0xf0 [ 100.503501][ T3353] ret_from_fork+0x35/0x40 [ 100.507927][ T3353] [ 100.510246][ T3353] Local variable description: ----buf.i@ax88179_mdio_read [ 100.518118][ T3353] Variable was created at: [ 100.522652][ T3353] ax88179_mdio_read+0x7b/0x240 [ 100.527527][ T3353] mii_nway_restart+0xcf/0x260 [ 100.532385][ T3353] ================================================================== [ 100.540440][ T3353] Disabling lock debugging due to kernel taint [ 100.546685][ T3353] Kernel panic - not syncing: panic_on_warn set ... [ 100.553264][ T3353] CPU: 1 PID: 3353 Comm: kworker/1:2 Tainted: G B 5.1.0+ #1 [ 100.561869][ T3353] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 100.572144][ T3353] Workqueue: usb_hub_wq hub_event [ 100.577168][ T3353] Call Trace: [ 100.580496][ T3353] dump_stack+0x191/0x1f0 [ 100.584920][ T3353] panic+0x3ca/0xafe [ 100.588842][ T3353] kmsan_report+0x298/0x2a0 [ 100.593606][ T3353] __msan_warning+0x75/0xe0 [ 100.598237][ T3353] mii_nway_restart+0x141/0x260 [ 100.603126][ T3353] ax88179_bind+0xee3/0x1a10 [ 100.608273][ T3353] ? ax88179_resume+0x10f0/0x10f0 [ 100.613633][ T3353] usbnet_probe+0x10f5/0x3940 [ 100.618381][ T3353] ? usbnet_disconnect+0x660/0x660 [ 100.624455][ T3353] usb_probe_interface+0xd66/0x1320 [ 100.629766][ T3353] ? usb_register_driver+0x7d0/0x7d0 [ 100.635059][ T3353] really_probe+0xdae/0x1d80 [ 100.640119][ T3353] driver_probe_device+0x1b3/0x4f0 [ 100.645363][ T3353] __device_attach_driver+0x5b8/0x790 [ 100.650749][ T3353] bus_for_each_drv+0x28e/0x3b0 [ 100.655885][ T3353] ? deferred_probe_work_func+0x400/0x400 [ 100.661617][ T3353] __device_attach+0x454/0x730 [ 100.666532][ T3353] device_initial_probe+0x4a/0x60 [ 100.671754][ T3353] bus_probe_device+0x137/0x390 [ 100.676645][ T3353] device_add+0x288d/0x30e0 [ 100.681170][ T3353] usb_set_configuration+0x30dc/0x3750 [ 100.686758][ T3353] generic_probe+0xe7/0x280 [ 100.691273][ T3353] ? usb_choose_configuration+0xae0/0xae0 [ 100.696995][ T3353] usb_probe_device+0x14c/0x200 [ 100.701847][ T3353] ? usb_register_device_driver+0x470/0x470 [ 100.707823][ T3353] really_probe+0xdae/0x1d80 [ 100.712542][ T3353] driver_probe_device+0x1b3/0x4f0 [ 100.717676][ T3353] __device_attach_driver+0x5b8/0x790 [ 100.723544][ T3353] bus_for_each_drv+0x28e/0x3b0 [ 100.728387][ T3353] ? deferred_probe_work_func+0x400/0x400 [ 100.734139][ T3353] __device_attach+0x454/0x730 [ 100.738913][ T3353] device_initial_probe+0x4a/0x60 [ 100.743942][ T3353] bus_probe_device+0x137/0x390 [ 100.748820][ T3353] device_add+0x288d/0x30e0 [ 100.753357][ T3353] usb_new_device+0x23e5/0x2ff0 [ 100.759224][ T3353] hub_event+0x48d1/0x7290 [ 100.763722][ T3353] ? kmsan_get_shadow_origin_ptr+0x71/0x470 [ 100.769725][ T3353] ? led_work+0x720/0x720 [ 100.774063][ T3353] ? led_work+0x720/0x720 [ 100.778410][ T3353] process_one_work+0x1572/0x1f00 [ 100.783526][ T3353] worker_thread+0x111b/0x2460 [ 100.788330][ T3353] kthread+0x4b5/0x4f0 [ 100.792480][ T3353] ? process_one_work+0x1f00/0x1f00 [ 100.797680][ T3353] ? kthread_blkcg+0xf0/0xf0 [ 100.802285][ T3353] ret_from_fork+0x35/0x40 [ 100.807867][ T3353] Kernel Offset: disabled [ 100.813274][ T3353] Rebooting in 86400 seconds..