Warning: Permanently added '10.128.0.62' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 24.244495][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 24.484442][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 24.604535][ T83] usb 1-1: config 0 has an invalid interface number: 236 but max is 0 [ 24.612762][ T83] usb 1-1: config 0 has no interface number 0 [ 24.619035][ T83] usb 1-1: config 0 interface 236 altsetting 0 endpoint 0x8D has an invalid bInterval 0, changing to 7 [ 24.630098][ T83] usb 1-1: config 0 interface 236 altsetting 0 bulk endpoint 0x5 has invalid maxpacket 0 [ 24.639956][ T83] usb 1-1: config 0 interface 236 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 0 [ 24.649893][ T83] usb 1-1: New USB device found, idVendor=0421, idProduct=008f, bcdDevice=8c.a0 [ 24.658958][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 24.668470][ T83] usb 1-1: config 0 descriptor?? [ 24.708085][ T83] rndis_wlan 1-1:0.236: invalid descriptor buffer length [ 24.715250][ T83] usb 1-1: bad CDC descriptors [ 24.721613][ T83] rndis_host 1-1:0.236: invalid descriptor buffer length [ 24.728822][ T83] usb 1-1: bad CDC descriptors [ 24.733774][ T83] cdc_acm 1-1:0.236: invalid descriptor buffer length [ 24.740616][ T83] cdc_acm 1-1:0.236: No union descriptor, testing for castrated device [ 24.749493][ T83] cdc_acm: probe of 1-1:0.236 failed with error -12 [ 24.906827][ T83] usb 1-1: USB disconnect, device number 2 [ 24.914537][ T83] ================================================================== [ 24.922701][ T83] BUG: KASAN: use-after-free in __mutex_lock+0xf23/0x1360 [ 24.929800][ T83] Read of size 8 at addr ffff8881d295bd08 by task kworker/1:2/83 [ 24.937596][ T83] [ 24.939912][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.3.0-rc4+ #26 [ 24.947339][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 24.957395][ T83] Workqueue: usb_hub_wq hub_event [ 24.962401][ T83] Call Trace: [ 24.965683][ T83] dump_stack+0xca/0x13e [ 24.969916][ T83] ? __mutex_lock+0xf23/0x1360 [ 24.974665][ T83] ? __mutex_lock+0xf23/0x1360 [ 24.979601][ T83] print_address_description+0x6a/0x32c [ 24.985236][ T83] ? __mutex_lock+0xf23/0x1360 [ 24.989982][ T83] ? __mutex_lock+0xf23/0x1360 [ 24.994986][ T83] __kasan_report.cold+0x1a/0x33 [ 25.000131][ T83] ? __mutex_lock+0xf23/0x1360 [ 25.004875][ T83] kasan_report+0xe/0x12 [ 25.009093][ T83] __mutex_lock+0xf23/0x1360 [ 25.013668][ T83] ? device_release_driver_internal+0x23/0x500 [ 25.019805][ T83] ? mark_held_locks+0x9f/0xe0 [ 25.024563][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 25.029830][ T83] ? mutex_trylock+0x2c0/0x2c0 [ 25.034571][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 25.039939][ T83] ? __kasan_slab_free+0x145/0x180 [ 25.045035][ T83] ? kfree_const+0x51/0x60 [ 25.049446][ T83] ? kfree+0xe4/0x2f0 [ 25.053640][ T83] ? device_remove_bin_file+0x30/0x30 [ 25.059081][ T83] ? device_release_driver_internal+0x23/0x500 [ 25.065234][ T83] device_release_driver_internal+0x23/0x500 [ 25.071194][ T83] bus_remove_device+0x2dc/0x4a0 [ 25.076210][ T83] device_del+0x420/0xb10 [ 25.080894][ T83] ? __device_links_no_driver+0x240/0x240 [ 25.086604][ T83] ? usb_remove_ep_devs+0x3e/0x80 [ 25.091697][ T83] ? remove_intf_ep_devs+0x13f/0x1d0 [ 25.096958][ T83] usb_disable_device+0x211/0x690 [ 25.101983][ T83] usb_disconnect+0x284/0x8d0 [ 25.106645][ T83] hub_event+0x1454/0x3640 [ 25.111247][ T83] ? find_held_lock+0x2d/0x110 [ 25.115997][ T83] ? mark_held_locks+0xe0/0xe0 [ 25.120750][ T83] ? hub_port_debounce+0x260/0x260 [ 25.126042][ T83] process_one_work+0x92b/0x1530 [ 25.130967][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 25.136337][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 25.141339][ T83] worker_thread+0x96/0xe20 [ 25.146097][ T83] ? process_one_work+0x1530/0x1530 [ 25.151290][ T83] kthread+0x318/0x420 [ 25.155433][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 25.160787][ T83] ret_from_fork+0x24/0x30 [ 25.165180][ T83] [ 25.167495][ T83] Allocated by task 83: [ 25.171648][ T83] save_stack+0x1b/0x80 [ 25.175797][ T83] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 25.181433][ T83] usb_set_configuration+0x2c4/0x1670 [ 25.190890][ T83] generic_probe+0x9d/0xd5 [ 25.195322][ T83] usb_probe_device+0x99/0x100 [ 25.200076][ T83] really_probe+0x281/0x6d0 [ 25.204654][ T83] driver_probe_device+0x101/0x1b0 [ 25.209846][ T83] __device_attach_driver+0x1c2/0x220 [ 25.215288][ T83] bus_for_each_drv+0x162/0x1e0 [ 25.220129][ T83] __device_attach+0x217/0x360 [ 25.224880][ T83] bus_probe_device+0x1e4/0x290 [ 25.229718][ T83] device_add+0xae6/0x16f0 [ 25.234110][ T83] usb_new_device.cold+0x6a4/0xe79 [ 25.239200][ T83] hub_event+0x1b5c/0x3640 [ 25.243594][ T83] process_one_work+0x92b/0x1530 [ 25.248506][ T83] worker_thread+0x96/0xe20 [ 25.253085][ T83] kthread+0x318/0x420 [ 25.257132][ T83] ret_from_fork+0x24/0x30 [ 25.261540][ T83] [ 25.263854][ T83] Freed by task 83: [ 25.267723][ T83] save_stack+0x1b/0x80 [ 25.271900][ T83] __kasan_slab_free+0x130/0x180 [ 25.276813][ T83] kfree+0xe4/0x2f0 [ 25.280602][ T83] device_release+0x71/0x200 [ 25.285178][ T83] kobject_put+0x171/0x280 [ 25.289574][ T83] put_device+0x1b/0x30 [ 25.293703][ T83] klist_put+0xce/0x170 [ 25.297833][ T83] bus_remove_device+0x3a4/0x4a0 [ 25.302765][ T83] device_del+0x420/0xb10 [ 25.307073][ T83] usb_disable_device+0x211/0x690 [ 25.312069][ T83] usb_disconnect+0x284/0x8d0 [ 25.316718][ T83] hub_event+0x1454/0x3640 [ 25.321110][ T83] process_one_work+0x92b/0x1530 [ 25.326033][ T83] worker_thread+0x96/0xe20 [ 25.330692][ T83] kthread+0x318/0x420 [ 25.334741][ T83] ret_from_fork+0x24/0x30 [ 25.339127][ T83] [ 25.341521][ T83] The buggy address belongs to the object at ffff8881d295bb80 [ 25.341521][ T83] which belongs to the cache kmalloc-2k of size 2048 [ 25.355555][ T83] The buggy address is located 392 bytes inside of [ 25.355555][ T83] 2048-byte region [ffff8881d295bb80, ffff8881d295c380) [ 25.369004][ T83] The buggy address belongs to the page: [ 25.374721][ T83] page:ffffea00074a5600 refcount:1 mapcount:0 mapping:ffff8881da00c000 index:0x0 compound_mapcount: 0 [ 25.385636][ T83] flags: 0x200000000010200(slab|head) [ 25.391003][ T83] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c000 [ 25.401753][ T83] raw: 0000000000000000 00000000800f000f 00000001ffffffff 0000000000000000 [ 25.411130][ T83] page dumped because: kasan: bad access detected [ 25.417526][ T83] [ 25.419833][ T83] Memory state around the buggy address: [ 25.425444][ T83] ffff8881d295bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.433506][ T83] ffff8881d295bc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.441581][ T83] >ffff8881d295bd00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.449748][ T83] ^ [ 25.454067][ T83] ffff8881d295bd80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.462309][ T83] ffff8881d295be00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.470531][ T83] ================================================================== [ 25.478567][ T83] Disabling lock debugging due to kernel taint [ 25.484786][ T83] Kernel panic - not syncing: panic_on_warn set ... [ 25.491366][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Tainted: G B 5.3.0-rc4+ #26 [ 25.500398][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.510533][ T83] Workqueue: usb_hub_wq hub_event [ 25.515540][ T83] Call Trace: [ 25.518812][ T83] dump_stack+0xca/0x13e [ 25.523028][ T83] panic+0x2a3/0x6da [ 25.526899][ T83] ? add_taint.cold+0x16/0x16 [ 25.531552][ T83] ? retint_kernel+0x10/0x10 [ 25.536117][ T83] ? trace_hardirqs_on+0x55/0x1e0 [ 25.541114][ T83] ? __mutex_lock+0xf23/0x1360 [ 25.545853][ T83] end_report+0x43/0x49 [ 25.549981][ T83] ? __mutex_lock+0xf23/0x1360 [ 25.554890][ T83] __kasan_report.cold+0xd/0x33 [ 25.559718][ T83] ? __mutex_lock+0xf23/0x1360 [ 25.564553][ T83] kasan_report+0xe/0x12 [ 25.568772][ T83] __mutex_lock+0xf23/0x1360 [ 25.573339][ T83] ? device_release_driver_internal+0x23/0x500 [ 25.579467][ T83] ? mark_held_locks+0x9f/0xe0 [ 25.584211][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 25.589476][ T83] ? mutex_trylock+0x2c0/0x2c0 [ 25.594221][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 25.599493][ T83] ? __kasan_slab_free+0x145/0x180 [ 25.604595][ T83] ? kfree_const+0x51/0x60 [ 25.608988][ T83] ? kfree+0xe4/0x2f0 [ 25.612941][ T83] ? device_remove_bin_file+0x30/0x30 [ 25.618375][ T83] ? device_release_driver_internal+0x23/0x500 [ 25.624722][ T83] device_release_driver_internal+0x23/0x500 [ 25.630678][ T83] bus_remove_device+0x2dc/0x4a0 [ 25.635611][ T83] device_del+0x420/0xb10 [ 25.639916][ T83] ? __device_links_no_driver+0x240/0x240 [ 25.646358][ T83] ? usb_remove_ep_devs+0x3e/0x80 [ 25.651534][ T83] ? remove_intf_ep_devs+0x13f/0x1d0 [ 25.656802][ T83] usb_disable_device+0x211/0x690 [ 25.661813][ T83] usb_disconnect+0x284/0x8d0 [ 25.666466][ T83] hub_event+0x1454/0x3640 [ 25.670858][ T83] ? find_held_lock+0x2d/0x110 [ 25.675597][ T83] ? mark_held_locks+0xe0/0xe0 [ 25.680335][ T83] ? hub_port_debounce+0x260/0x260 [ 25.685697][ T83] process_one_work+0x92b/0x1530 [ 25.690629][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 25.696349][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 25.701354][ T83] worker_thread+0x96/0xe20 [ 25.705983][ T83] ? process_one_work+0x1530/0x1530 [ 25.711435][ T83] kthread+0x318/0x420 [ 25.715608][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 25.720990][ T83] ret_from_fork+0x24/0x30 [ 25.725838][ T83] Kernel Offset: disabled [ 25.730322][ T83] Rebooting in 86400 seconds..