Warning: Permanently added '10.128.0.54' (ECDSA) to the list of known hosts. executing program [ 25.149026][ T22] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 25.388968][ T22] usb 1-1: Using ep0 maxpacket: 8 [ 25.509077][ T22] usb 1-1: New USB device found, idVendor=0b95, idProduct=172a, bcdDevice=dc.dc [ 25.518221][ T22] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 25.527615][ T22] usb 1-1: config 0 descriptor?? [ 25.799119][ T22] asix 1-1:0.0 (unnamed net_device) (uninitialized): Failed to read MAC address: 0 [ 25.811986][ T22] asix 1-1:0.0 eth1: register 'asix' at usb-dummy_hcd.0-1, ASIX AX88172A USB 2.0 Ethernet, f6:55:9a:34:1f:d7 executing program [ 26.000642][ T12] usb 1-1: USB disconnect, device number 2 [ 26.007158][ T12] asix 1-1:0.0 eth1: unregister 'asix' usb-dummy_hcd.0-1, ASIX AX88172A USB 2.0 Ethernet [ 26.089320][ T12] ================================================================== [ 26.097831][ T12] BUG: KASAN: use-after-free in ax88172a_unbind+0x76/0xed [ 26.104923][ T12] Read of size 8 at addr ffff8881d0b5d480 by task kworker/0:1/12 [ 26.112624][ T12] [ 26.114941][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.5.0-rc2-syzkaller #0 [ 26.123080][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.133230][ T12] Workqueue: usb_hub_wq hub_event [ 26.138246][ T12] Call Trace: [ 26.141518][ T12] dump_stack+0xef/0x16e [ 26.145737][ T12] ? ax88172a_unbind+0x76/0xed [ 26.150499][ T12] ? ax88172a_unbind+0x76/0xed [ 26.155242][ T12] print_address_description.constprop.0+0x16/0x200 [ 26.161808][ T12] ? ax88172a_unbind+0x76/0xed [ 26.166549][ T12] ? ax88172a_unbind+0x76/0xed [ 26.171289][ T12] __kasan_report.cold+0x37/0x7f [ 26.176449][ T12] ? mark_lock+0x1160/0x1160 [ 26.181029][ T12] ? ax88172a_unbind+0x76/0xed [ 26.185871][ T12] ? ax88172a_bind.cold+0x1e8/0x1e8 [ 26.191090][ T12] kasan_report+0xe/0x20 [ 26.195315][ T12] ax88172a_unbind+0x76/0xed [ 26.199884][ T12] usbnet_disconnect+0x145/0x270 [ 26.204799][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 26.209990][ T12] ? usb_autoresume_device+0x60/0x60 [ 26.215253][ T12] device_release_driver_internal+0x42f/0x500 [ 26.221299][ T12] bus_remove_device+0x2dc/0x4a0 [ 26.226216][ T12] device_del+0x481/0xd30 [ 26.230546][ T12] ? device_create_with_groups+0x120/0x120 [ 26.236328][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 26.241591][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 26.247136][ T12] usb_disable_device+0x211/0x690 [ 26.252936][ T12] usb_disconnect+0x284/0x8d0 [ 26.258050][ T12] hub_event+0x1753/0x3860 [ 26.262508][ T12] ? hub_port_debounce+0x260/0x260 [ 26.268050][ T12] ? find_held_lock+0x2d/0x110 [ 26.272794][ T12] ? mark_held_locks+0xe0/0xe0 [ 26.277536][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 26.283060][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 26.288353][ T12] process_one_work+0x92b/0x1530 [ 26.293325][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 26.298701][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 26.303737][ T12] worker_thread+0x96/0xe20 [ 26.308330][ T12] ? process_one_work+0x1530/0x1530 [ 26.313507][ T12] kthread+0x318/0x420 [ 26.317564][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 26.322915][ T12] ret_from_fork+0x24/0x30 [ 26.327999][ T12] [ 26.330317][ T12] Allocated by task 22: [ 26.334450][ T12] save_stack+0x1b/0x80 [ 26.338581][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 26.344377][ T12] ax88172a_bind+0x9f/0x7a2 [ 26.348875][ T12] usbnet_probe+0xb43/0x2470 [ 26.353461][ T12] usb_probe_interface+0x305/0x7a0 [ 26.358568][ T12] really_probe+0x281/0x6d0 [ 26.363053][ T12] driver_probe_device+0x104/0x210 [ 26.368147][ T12] __device_attach_driver+0x1c2/0x220 [ 26.373498][ T12] bus_for_each_drv+0x162/0x1e0 [ 26.378343][ T12] __device_attach+0x217/0x360 [ 26.383096][ T12] bus_probe_device+0x1e4/0x290 [ 26.387977][ T12] device_add+0x1480/0x1c20 [ 26.392466][ T12] usb_set_configuration+0xe67/0x1740 [ 26.397828][ T12] generic_probe+0x9d/0xd5 [ 26.402221][ T12] usb_probe_device+0x99/0x100 [ 26.406961][ T12] really_probe+0x281/0x6d0 [ 26.411438][ T12] driver_probe_device+0x104/0x210 [ 26.416523][ T12] __device_attach_driver+0x1c2/0x220 [ 26.421884][ T12] bus_for_each_drv+0x162/0x1e0 [ 26.426718][ T12] __device_attach+0x217/0x360 [ 26.431585][ T12] bus_probe_device+0x1e4/0x290 [ 26.436419][ T12] device_add+0x1480/0x1c20 [ 26.440904][ T12] usb_new_device.cold+0x6a4/0xe79 [ 26.446001][ T12] hub_event+0x1e59/0x3860 [ 26.450394][ T12] process_one_work+0x92b/0x1530 [ 26.455307][ T12] worker_thread+0x96/0xe20 [ 26.459786][ T12] kthread+0x318/0x420 [ 26.463833][ T12] ret_from_fork+0x24/0x30 [ 26.468252][ T12] [ 26.470559][ T12] Freed by task 22: [ 26.474367][ T12] save_stack+0x1b/0x80 [ 26.478497][ T12] __kasan_slab_free+0x129/0x170 [ 26.483498][ T12] kfree+0xda/0x310 [ 26.487295][ T12] ax88172a_bind.cold+0x4d/0x1e8 [ 26.492210][ T12] usbnet_probe+0xb43/0x2470 [ 26.496777][ T12] usb_probe_interface+0x305/0x7a0 [ 26.501865][ T12] really_probe+0x281/0x6d0 [ 26.506360][ T12] driver_probe_device+0x104/0x210 [ 26.511451][ T12] __device_attach_driver+0x1c2/0x220 [ 26.516798][ T12] bus_for_each_drv+0x162/0x1e0 [ 26.521642][ T12] __device_attach+0x217/0x360 [ 26.526382][ T12] bus_probe_device+0x1e4/0x290 [ 26.531206][ T12] device_add+0x1480/0x1c20 [ 26.535686][ T12] usb_set_configuration+0xe67/0x1740 [ 26.541032][ T12] generic_probe+0x9d/0xd5 [ 26.545436][ T12] usb_probe_device+0x99/0x100 [ 26.550177][ T12] really_probe+0x281/0x6d0 [ 26.554666][ T12] driver_probe_device+0x104/0x210 [ 26.559756][ T12] __device_attach_driver+0x1c2/0x220 [ 26.565102][ T12] bus_for_each_drv+0x162/0x1e0 [ 26.569929][ T12] __device_attach+0x217/0x360 [ 26.574667][ T12] bus_probe_device+0x1e4/0x290 [ 26.579491][ T12] device_add+0x1480/0x1c20 [ 26.583969][ T12] usb_new_device.cold+0x6a4/0xe79 [ 26.589068][ T12] hub_event+0x1e59/0x3860 [ 26.593466][ T12] process_one_work+0x92b/0x1530 [ 26.598501][ T12] worker_thread+0x96/0xe20 [ 26.602992][ T12] kthread+0x318/0x420 [ 26.607040][ T12] ret_from_fork+0x24/0x30 [ 26.611427][ T12] [ 26.613737][ T12] The buggy address belongs to the object at ffff8881d0b5d480 [ 26.613737][ T12] which belongs to the cache kmalloc-64 of size 64 [ 26.627592][ T12] The buggy address is located 0 bytes inside of [ 26.627592][ T12] 64-byte region [ffff8881d0b5d480, ffff8881d0b5d4c0) [ 26.640589][ T12] The buggy address belongs to the page: [ 26.646203][ T12] page:ffffea000742d740 refcount:1 mapcount:0 mapping:ffff8881da003180 index:0x0 [ 26.655285][ T12] raw: 0200000000000200 ffffea00074015c0 0000000400000004 ffff8881da003180 [ 26.663864][ T12] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 [ 26.672435][ T12] page dumped because: kasan: bad access detected [ 26.678836][ T12] [ 26.681150][ T12] Memory state around the buggy address: [ 26.686851][ T12] ffff8881d0b5d380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.694999][ T12] ffff8881d0b5d400: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.703052][ T12] >ffff8881d0b5d480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.711089][ T12] ^ [ 26.715136][ T12] ffff8881d0b5d500: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.723174][ T12] ffff8881d0b5d580: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.731208][ T12] ================================================================== [ 26.739244][ T12] Disabling lock debugging due to kernel taint [ 26.745415][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 26.751997][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.5.0-rc2-syzkaller #0 [ 26.761962][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.772013][ T12] Workqueue: usb_hub_wq hub_event [ 26.777015][ T12] Call Trace: [ 26.780286][ T12] dump_stack+0xef/0x16e [ 26.784543][ T12] panic+0x2aa/0x6e1 [ 26.788417][ T12] ? add_taint.cold+0x16/0x16 [ 26.793099][ T12] ? ax88172a_unbind+0x76/0xed [ 26.797854][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 26.802966][ T12] ? ax88172a_unbind+0x76/0xed [ 26.807706][ T12] end_report+0x43/0x49 [ 26.811836][ T12] ? ax88172a_unbind+0x76/0xed [ 26.816600][ T12] __kasan_report.cold+0x55/0x7f [ 26.822036][ T12] ? mark_lock+0x1160/0x1160 [ 26.826692][ T12] ? ax88172a_unbind+0x76/0xed [ 26.831432][ T12] ? ax88172a_bind.cold+0x1e8/0x1e8 [ 26.836613][ T12] kasan_report+0xe/0x20 [ 26.840845][ T12] ax88172a_unbind+0x76/0xed [ 26.845412][ T12] usbnet_disconnect+0x145/0x270 [ 26.850326][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 26.855501][ T12] ? usb_autoresume_device+0x60/0x60 [ 26.860775][ T12] device_release_driver_internal+0x42f/0x500 [ 26.866837][ T12] bus_remove_device+0x2dc/0x4a0 [ 26.871766][ T12] device_del+0x481/0xd30 [ 26.876079][ T12] ? device_create_with_groups+0x120/0x120 [ 26.881861][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 26.887132][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 26.892409][ T12] usb_disable_device+0x211/0x690 [ 26.897421][ T12] usb_disconnect+0x284/0x8d0 [ 26.902072][ T12] hub_event+0x1753/0x3860 [ 26.906477][ T12] ? hub_port_debounce+0x260/0x260 [ 26.911585][ T12] ? find_held_lock+0x2d/0x110 [ 26.916325][ T12] ? mark_held_locks+0xe0/0xe0 [ 26.921455][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 26.926979][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 26.932243][ T12] process_one_work+0x92b/0x1530 [ 26.937161][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 26.942520][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 26.947520][ T12] worker_thread+0x96/0xe20 [ 26.952029][ T12] ? process_one_work+0x1530/0x1530 [ 26.957214][ T12] kthread+0x318/0x420 [ 26.961259][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 26.966606][ T12] ret_from_fork+0x24/0x30 [ 26.971629][ T12] Kernel Offset: disabled [ 26.975943][ T12] Rebooting in 86400 seconds..