Warning: Permanently added '10.128.1.3' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 28.150326][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 28.390277][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 28.510439][ T83] usb 1-1: New USB device found, idVendor=0b95, idProduct=172a, bcdDevice=dc.dc [ 28.519982][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 28.529635][ T83] usb 1-1: config 0 descriptor?? [ 28.780424][ T83] asix 1-1:0.0 (unnamed net_device) (uninitialized): Failed to read MAC address: 0 [ 28.795872][ T83] asix 1-1:0.0 eth1: register 'asix' at usb-dummy_hcd.0-1, ASIX AX88172A USB 2.0 Ethernet, f6:9f:1e:b8:b0:9c executing program [ 28.982199][ T12] usb 1-1: USB disconnect, device number 2 [ 28.989385][ T12] asix 1-1:0.0 eth1: unregister 'asix' usb-dummy_hcd.0-1, ASIX AX88172A USB 2.0 Ethernet [ 29.030937][ T12] ================================================================== [ 29.039163][ T12] BUG: KASAN: use-after-free in ax88172a_unbind+0x76/0xed [ 29.046467][ T12] Read of size 8 at addr ffff8881d0325380 by task kworker/0:1/12 [ 29.054361][ T12] [ 29.056722][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.5.0-rc2-syzkaller #0 [ 29.065292][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.075478][ T12] Workqueue: usb_hub_wq hub_event [ 29.080561][ T12] Call Trace: [ 29.083847][ T12] dump_stack+0xef/0x16e [ 29.088256][ T12] ? ax88172a_unbind+0x76/0xed [ 29.093193][ T12] ? ax88172a_unbind+0x76/0xed [ 29.098056][ T12] print_address_description.constprop.0+0x16/0x200 [ 29.104739][ T12] ? ax88172a_unbind+0x76/0xed [ 29.109744][ T12] ? ax88172a_unbind+0x76/0xed [ 29.114717][ T12] __kasan_report.cold+0x37/0x7f [ 29.119713][ T12] ? ax88172a_unbind+0x76/0xed [ 29.124752][ T12] ? ax88172a_bind.cold+0x1e8/0x1e8 [ 29.130113][ T12] kasan_report+0xe/0x20 [ 29.134346][ T12] ax88172a_unbind+0x76/0xed [ 29.139350][ T12] usbnet_disconnect+0x145/0x270 [ 29.144375][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 29.149572][ T12] ? usb_autoresume_device+0x60/0x60 [ 29.154860][ T12] device_release_driver_internal+0x42f/0x500 [ 29.160918][ T12] bus_remove_device+0x2dc/0x4a0 [ 29.166176][ T12] device_del+0x481/0xd30 [ 29.170503][ T12] ? device_create_with_groups+0x120/0x120 [ 29.176631][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 29.182009][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 29.187301][ T12] usb_disable_device+0x211/0x690 [ 29.192328][ T12] usb_disconnect+0x284/0x8d0 [ 29.197161][ T12] hub_event+0x1753/0x3860 [ 29.201572][ T12] ? hub_port_debounce+0x260/0x260 [ 29.206943][ T12] ? find_held_lock+0x2d/0x110 [ 29.212164][ T12] ? mark_held_locks+0xe0/0xe0 [ 29.217241][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 29.222987][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 29.228386][ T12] process_one_work+0x92b/0x1530 [ 29.234736][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 29.240469][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 29.245505][ T12] worker_thread+0x96/0xe20 [ 29.250365][ T12] ? process_one_work+0x1530/0x1530 [ 29.256033][ T12] kthread+0x318/0x420 [ 29.260347][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 29.265879][ T12] ret_from_fork+0x24/0x30 [ 29.270535][ T12] [ 29.272864][ T12] Allocated by task 83: [ 29.277020][ T12] save_stack+0x1b/0x80 [ 29.281291][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 29.286914][ T12] ax88172a_bind+0x9f/0x7a2 [ 29.291411][ T12] usbnet_probe+0xb43/0x2470 [ 29.296053][ T12] usb_probe_interface+0x305/0x7a0 [ 29.301587][ T12] really_probe+0x281/0x6d0 [ 29.306212][ T12] driver_probe_device+0x104/0x210 [ 29.311348][ T12] __device_attach_driver+0x1c2/0x220 [ 29.316820][ T12] bus_for_each_drv+0x162/0x1e0 [ 29.321664][ T12] __device_attach+0x217/0x360 [ 29.326534][ T12] bus_probe_device+0x1e4/0x290 [ 29.331374][ T12] device_add+0x1480/0x1c20 [ 29.335992][ T12] usb_set_configuration+0xe67/0x1740 [ 29.341631][ T12] generic_probe+0x9d/0xd5 [ 29.346290][ T12] usb_probe_device+0x99/0x100 [ 29.351060][ T12] really_probe+0x281/0x6d0 [ 29.355928][ T12] driver_probe_device+0x104/0x210 [ 29.361036][ T12] __device_attach_driver+0x1c2/0x220 [ 29.366684][ T12] bus_for_each_drv+0x162/0x1e0 [ 29.371796][ T12] __device_attach+0x217/0x360 [ 29.376764][ T12] bus_probe_device+0x1e4/0x290 [ 29.381833][ T12] device_add+0x1480/0x1c20 [ 29.386508][ T12] usb_new_device.cold+0x6a4/0xe79 [ 29.392053][ T12] hub_event+0x1e59/0x3860 [ 29.396471][ T12] process_one_work+0x92b/0x1530 [ 29.401547][ T12] worker_thread+0x96/0xe20 [ 29.406105][ T12] kthread+0x318/0x420 [ 29.410174][ T12] ret_from_fork+0x24/0x30 [ 29.414708][ T12] [ 29.417027][ T12] Freed by task 83: [ 29.420825][ T12] save_stack+0x1b/0x80 [ 29.425078][ T12] __kasan_slab_free+0x129/0x170 [ 29.430093][ T12] kfree+0xda/0x310 [ 29.434017][ T12] ax88172a_bind.cold+0x4d/0x1e8 [ 29.438947][ T12] usbnet_probe+0xb43/0x2470 [ 29.443664][ T12] usb_probe_interface+0x305/0x7a0 [ 29.448826][ T12] really_probe+0x281/0x6d0 [ 29.453321][ T12] driver_probe_device+0x104/0x210 [ 29.458429][ T12] __device_attach_driver+0x1c2/0x220 [ 29.464173][ T12] bus_for_each_drv+0x162/0x1e0 [ 29.469021][ T12] __device_attach+0x217/0x360 [ 29.473910][ T12] bus_probe_device+0x1e4/0x290 [ 29.478877][ T12] device_add+0x1480/0x1c20 [ 29.483375][ T12] usb_set_configuration+0xe67/0x1740 [ 29.489078][ T12] generic_probe+0x9d/0xd5 [ 29.493598][ T12] usb_probe_device+0x99/0x100 [ 29.498567][ T12] really_probe+0x281/0x6d0 [ 29.503544][ T12] driver_probe_device+0x104/0x210 [ 29.508905][ T12] __device_attach_driver+0x1c2/0x220 [ 29.514525][ T12] bus_for_each_drv+0x162/0x1e0 [ 29.519521][ T12] __device_attach+0x217/0x360 [ 29.524592][ T12] bus_probe_device+0x1e4/0x290 [ 29.529437][ T12] device_add+0x1480/0x1c20 [ 29.533938][ T12] usb_new_device.cold+0x6a4/0xe79 [ 29.539635][ T12] hub_event+0x1e59/0x3860 [ 29.544046][ T12] process_one_work+0x92b/0x1530 [ 29.549187][ T12] worker_thread+0x96/0xe20 [ 29.553996][ T12] kthread+0x318/0x420 [ 29.558238][ T12] ret_from_fork+0x24/0x30 [ 29.562713][ T12] [ 29.565163][ T12] The buggy address belongs to the object at ffff8881d0325380 [ 29.565163][ T12] which belongs to the cache kmalloc-64 of size 64 [ 29.579171][ T12] The buggy address is located 0 bytes inside of [ 29.579171][ T12] 64-byte region [ffff8881d0325380, ffff8881d03253c0) [ 29.592264][ T12] The buggy address belongs to the page: [ 29.597977][ T12] page:ffffea000740c940 refcount:1 mapcount:0 mapping:ffff8881da003180 index:0x0 [ 29.607209][ T12] raw: 0200000000000200 ffffea000746e540 0000001a0000001a ffff8881da003180 [ 29.616071][ T12] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 [ 29.625009][ T12] page dumped because: kasan: bad access detected [ 29.631557][ T12] [ 29.633955][ T12] Memory state around the buggy address: [ 29.639749][ T12] ffff8881d0325280: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.647922][ T12] ffff8881d0325300: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.656370][ T12] >ffff8881d0325380: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.664565][ T12] ^ [ 29.668753][ T12] ffff8881d0325400: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.676943][ T12] ffff8881d0325480: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.685466][ T12] ================================================================== [ 29.693631][ T12] Disabling lock debugging due to kernel taint [ 29.699894][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 29.706502][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.5.0-rc2-syzkaller #0 [ 29.716588][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.727756][ T12] Workqueue: usb_hub_wq hub_event [ 29.733314][ T12] Call Trace: [ 29.736799][ T12] dump_stack+0xef/0x16e [ 29.741159][ T12] panic+0x2aa/0x6e1 [ 29.745301][ T12] ? add_taint.cold+0x16/0x16 [ 29.750168][ T12] ? ax88172a_unbind+0x76/0xed [ 29.755107][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 29.760609][ T12] ? ax88172a_unbind+0x76/0xed [ 29.765512][ T12] end_report+0x43/0x49 [ 29.769665][ T12] ? ax88172a_unbind+0x76/0xed [ 29.774702][ T12] __kasan_report.cold+0x55/0x7f [ 29.779650][ T12] ? ax88172a_unbind+0x76/0xed [ 29.784518][ T12] ? ax88172a_bind.cold+0x1e8/0x1e8 [ 29.789711][ T12] kasan_report+0xe/0x20 [ 29.794173][ T12] ax88172a_unbind+0x76/0xed [ 29.798878][ T12] usbnet_disconnect+0x145/0x270 [ 29.804042][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 29.809488][ T12] ? usb_autoresume_device+0x60/0x60 [ 29.814822][ T12] device_release_driver_internal+0x42f/0x500 [ 29.820886][ T12] bus_remove_device+0x2dc/0x4a0 [ 29.825877][ T12] device_del+0x481/0xd30 [ 29.830208][ T12] ? device_create_with_groups+0x120/0x120 [ 29.836405][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 29.841848][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 29.847380][ T12] usb_disable_device+0x211/0x690 [ 29.852596][ T12] usb_disconnect+0x284/0x8d0 [ 29.857420][ T12] hub_event+0x1753/0x3860 [ 29.861841][ T12] ? hub_port_debounce+0x260/0x260 [ 29.867113][ T12] ? find_held_lock+0x2d/0x110 [ 29.871872][ T12] ? mark_held_locks+0xe0/0xe0 [ 29.876627][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 29.882970][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 29.888368][ T12] process_one_work+0x92b/0x1530 [ 29.893313][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 29.898676][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 29.903691][ T12] worker_thread+0x96/0xe20 [ 29.908188][ T12] ? process_one_work+0x1530/0x1530 [ 29.913381][ T12] kthread+0x318/0x420 [ 29.917577][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 29.923077][ T12] ret_from_fork+0x24/0x30 [ 29.928372][ T12] Kernel Offset: disabled [ 29.932794][ T12] Rebooting in 86400 seconds..