Warning: Permanently added '10.128.15.197' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 25.091537][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 25.331486][ T83] usb 1-1: Using ep0 maxpacket: 16 [ 25.451618][ T83] usb 1-1: config 0 has an invalid interface number: 55 but max is 0 [ 25.459774][ T83] usb 1-1: config 0 contains an unexpected descriptor of type 0x2, skipping [ 25.468673][ T83] usb 1-1: config 0 has no interface number 0 [ 25.474798][ T83] usb 1-1: config 0 interface 55 altsetting 0 endpoint 0x8D has an invalid bInterval 0, changing to 7 [ 25.485795][ T83] usb 1-1: config 0 interface 55 altsetting 0 bulk endpoint 0x5 has invalid maxpacket 0 [ 25.495554][ T83] usb 1-1: config 0 interface 55 altsetting 0 bulk endpoint 0x8F has invalid maxpacket 0 [ 25.505431][ T83] usb 1-1: New USB device found, idVendor=0421, idProduct=0094, bcdDevice=86.b4 [ 25.514490][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 25.524212][ T83] usb 1-1: config 0 descriptor?? [ 25.564775][ T83] rndis_wlan 1-1:0.55: invalid descriptor buffer length [ 25.571830][ T83] usb 1-1: bad CDC descriptors [ 25.578275][ T83] rndis_host 1-1:0.55: invalid descriptor buffer length [ 25.585365][ T83] usb 1-1: bad CDC descriptors [ 25.590309][ T83] cdc_acm 1-1:0.55: invalid descriptor buffer length [ 25.597030][ T83] cdc_acm 1-1:0.55: No union descriptor, testing for castrated device [ 25.605419][ T83] cdc_acm: probe of 1-1:0.55 failed with error -12 [ 25.763714][ T83] usb 1-1: USB disconnect, device number 2 [ 25.771024][ T83] ================================================================== [ 25.779170][ T83] BUG: KASAN: use-after-free in __mutex_lock+0xf23/0x1360 [ 25.786255][ T83] Read of size 8 at addr ffff8881d629b488 by task kworker/1:2/83 [ 25.793956][ T83] [ 25.796265][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.3.0-rc4+ #26 [ 25.803689][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 25.813731][ T83] Workqueue: usb_hub_wq hub_event [ 25.818752][ T83] Call Trace: [ 25.822029][ T83] dump_stack+0xca/0x13e [ 25.826254][ T83] ? __mutex_lock+0xf23/0x1360 [ 25.831001][ T83] ? __mutex_lock+0xf23/0x1360 [ 25.835753][ T83] print_address_description+0x6a/0x32c [ 25.841287][ T83] ? __mutex_lock+0xf23/0x1360 [ 25.846046][ T83] ? __mutex_lock+0xf23/0x1360 [ 25.850787][ T83] __kasan_report.cold+0x1a/0x33 [ 25.855713][ T83] ? __mutex_lock+0xf23/0x1360 [ 25.860459][ T83] kasan_report+0xe/0x12 [ 25.864690][ T83] __mutex_lock+0xf23/0x1360 [ 25.869261][ T83] ? device_release_driver_internal+0x23/0x500 [ 25.875402][ T83] ? mark_held_locks+0x9f/0xe0 [ 25.880144][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 25.885415][ T83] ? mutex_trylock+0x2c0/0x2c0 [ 25.890163][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 25.895436][ T83] ? __kasan_slab_free+0x145/0x180 [ 25.900546][ T83] ? kfree_const+0x51/0x60 [ 25.904946][ T83] ? kfree+0xe4/0x2f0 [ 25.908922][ T83] ? device_remove_bin_file+0x30/0x30 [ 25.914288][ T83] ? device_release_driver_internal+0x23/0x500 [ 25.920423][ T83] device_release_driver_internal+0x23/0x500 [ 25.926472][ T83] bus_remove_device+0x2dc/0x4a0 [ 25.931395][ T83] device_del+0x420/0xb10 [ 25.935731][ T83] ? __device_links_no_driver+0x240/0x240 [ 25.941446][ T83] ? usb_remove_ep_devs+0x3e/0x80 [ 25.946462][ T83] ? remove_intf_ep_devs+0x13f/0x1d0 [ 25.951732][ T83] usb_disable_device+0x211/0x690 [ 25.956757][ T83] usb_disconnect+0x284/0x8d0 [ 25.961427][ T83] hub_event+0x1454/0x3640 [ 25.965830][ T83] ? find_held_lock+0x2d/0x110 [ 25.970702][ T83] ? mark_held_locks+0xe0/0xe0 [ 25.975691][ T83] ? hub_port_debounce+0x260/0x260 [ 25.980894][ T83] process_one_work+0x92b/0x1530 [ 25.985824][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 25.991184][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 25.996197][ T83] worker_thread+0x96/0xe20 [ 26.000688][ T83] ? process_one_work+0x1530/0x1530 [ 26.005881][ T83] kthread+0x318/0x420 [ 26.009932][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 26.015292][ T83] ret_from_fork+0x24/0x30 [ 26.019714][ T83] [ 26.022021][ T83] Allocated by task 83: [ 26.026158][ T83] save_stack+0x1b/0x80 [ 26.030292][ T83] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 26.035910][ T83] usb_set_configuration+0x2c4/0x1670 [ 26.041272][ T83] generic_probe+0x9d/0xd5 [ 26.045693][ T83] usb_probe_device+0x99/0x100 [ 26.050443][ T83] really_probe+0x281/0x6d0 [ 26.054935][ T83] driver_probe_device+0x101/0x1b0 [ 26.060029][ T83] __device_attach_driver+0x1c2/0x220 [ 26.065387][ T83] bus_for_each_drv+0x162/0x1e0 [ 26.070216][ T83] __device_attach+0x217/0x360 [ 26.074978][ T83] bus_probe_device+0x1e4/0x290 [ 26.079811][ T83] device_add+0xae6/0x16f0 [ 26.084220][ T83] usb_new_device.cold+0x6a4/0xe79 [ 26.089317][ T83] hub_event+0x1b5c/0x3640 [ 26.093717][ T83] process_one_work+0x92b/0x1530 [ 26.098641][ T83] worker_thread+0x96/0xe20 [ 26.103124][ T83] kthread+0x318/0x420 [ 26.107179][ T83] ret_from_fork+0x24/0x30 [ 26.111569][ T83] [ 26.113891][ T83] Freed by task 83: [ 26.117682][ T83] save_stack+0x1b/0x80 [ 26.121819][ T83] __kasan_slab_free+0x130/0x180 [ 26.126737][ T83] kfree+0xe4/0x2f0 [ 26.130675][ T83] device_release+0x71/0x200 [ 26.135246][ T83] kobject_put+0x171/0x280 [ 26.139656][ T83] put_device+0x1b/0x30 [ 26.143790][ T83] klist_put+0xce/0x170 [ 26.147941][ T83] bus_remove_device+0x3a4/0x4a0 [ 26.152861][ T83] device_del+0x420/0xb10 [ 26.157182][ T83] usb_disable_device+0x211/0x690 [ 26.162191][ T83] usb_disconnect+0x284/0x8d0 [ 26.166857][ T83] hub_event+0x1454/0x3640 [ 26.171284][ T83] process_one_work+0x92b/0x1530 [ 26.176206][ T83] worker_thread+0x96/0xe20 [ 26.180686][ T83] kthread+0x318/0x420 [ 26.184735][ T83] ret_from_fork+0x24/0x30 [ 26.189122][ T83] [ 26.191433][ T83] The buggy address belongs to the object at ffff8881d629b300 [ 26.191433][ T83] which belongs to the cache kmalloc-2k of size 2048 [ 26.205480][ T83] The buggy address is located 392 bytes inside of [ 26.205480][ T83] 2048-byte region [ffff8881d629b300, ffff8881d629bb00) [ 26.218835][ T83] The buggy address belongs to the page: [ 26.224459][ T83] page:ffffea000758a600 refcount:1 mapcount:0 mapping:ffff8881da00c000 index:0x0 compound_mapcount: 0 [ 26.235375][ T83] flags: 0x200000000010200(slab|head) [ 26.240734][ T83] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c000 [ 26.249311][ T83] raw: 0000000000000000 00000000000f000f 00000001ffffffff 0000000000000000 [ 26.257897][ T83] page dumped because: kasan: bad access detected [ 26.264309][ T83] [ 26.266616][ T83] Memory state around the buggy address: [ 26.272248][ T83] ffff8881d629b380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.280325][ T83] ffff8881d629b400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.288382][ T83] >ffff8881d629b480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.296535][ T83] ^ [ 26.300848][ T83] ffff8881d629b500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.308904][ T83] ffff8881d629b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.316949][ T83] ================================================================== [ 26.325011][ T83] Disabling lock debugging due to kernel taint [ 26.331274][ T83] Kernel panic - not syncing: panic_on_warn set ... [ 26.337875][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Tainted: G B 5.3.0-rc4+ #26 [ 26.346696][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 26.356745][ T83] Workqueue: usb_hub_wq hub_event [ 26.361747][ T83] Call Trace: [ 26.365025][ T83] dump_stack+0xca/0x13e [ 26.369245][ T83] panic+0x2a3/0x6da [ 26.373118][ T83] ? add_taint.cold+0x16/0x16 [ 26.377778][ T83] ? retint_kernel+0x10/0x10 [ 26.382439][ T83] ? trace_hardirqs_on+0x55/0x1e0 [ 26.387453][ T83] ? __mutex_lock+0xf23/0x1360 [ 26.392376][ T83] end_report+0x43/0x49 [ 26.396528][ T83] ? __mutex_lock+0xf23/0x1360 [ 26.401281][ T83] __kasan_report.cold+0xd/0x33 [ 26.406184][ T83] ? __mutex_lock+0xf23/0x1360 [ 26.410983][ T83] kasan_report+0xe/0x12 [ 26.415296][ T83] __mutex_lock+0xf23/0x1360 [ 26.419871][ T83] ? device_release_driver_internal+0x23/0x500 [ 26.426467][ T83] ? mark_held_locks+0x9f/0xe0 [ 26.431310][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 26.436619][ T83] ? mutex_trylock+0x2c0/0x2c0 [ 26.441377][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 26.446659][ T83] ? __kasan_slab_free+0x145/0x180 [ 26.451909][ T83] ? kfree_const+0x51/0x60 [ 26.456521][ T83] ? kfree+0xe4/0x2f0 [ 26.460595][ T83] ? device_remove_bin_file+0x30/0x30 [ 26.465954][ T83] ? device_release_driver_internal+0x23/0x500 [ 26.472137][ T83] device_release_driver_internal+0x23/0x500 [ 26.478102][ T83] bus_remove_device+0x2dc/0x4a0 [ 26.483020][ T83] device_del+0x420/0xb10 [ 26.487330][ T83] ? __device_links_no_driver+0x240/0x240 [ 26.493029][ T83] ? usb_remove_ep_devs+0x3e/0x80 [ 26.498034][ T83] ? remove_intf_ep_devs+0x13f/0x1d0 [ 26.503338][ T83] usb_disable_device+0x211/0x690 [ 26.508426][ T83] usb_disconnect+0x284/0x8d0 [ 26.513187][ T83] hub_event+0x1454/0x3640 [ 26.517645][ T83] ? find_held_lock+0x2d/0x110 [ 26.522399][ T83] ? mark_held_locks+0xe0/0xe0 [ 26.527142][ T83] ? hub_port_debounce+0x260/0x260 [ 26.532235][ T83] process_one_work+0x92b/0x1530 [ 26.537234][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 26.542659][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 26.547666][ T83] worker_thread+0x96/0xe20 [ 26.552152][ T83] ? process_one_work+0x1530/0x1530 [ 26.557342][ T83] kthread+0x318/0x420 [ 26.561398][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 26.566756][ T83] ret_from_fork+0x24/0x30 [ 26.571484][ T83] Kernel Offset: disabled [ 26.575803][ T83] Rebooting in 86400 seconds..