[ 16.724886][ T5528] 8021q: adding VLAN 0 to HW filter on device bond0 [ 16.728913][ T5528] eql: remember to turn off Van-Jacobson compression on your slave devices [ 16.778954][ T39] gvnic 0000:00:00.0 enp0s0: Device link is up. [ 16.782299][ T1522] IPv6: ADDRCONF(NETDEV_CHANGE): enp0s0: link becomes ready Starting sshd: OK syzkaller syzkaller login: [ 69.601325][ T22] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.0.64' (ECDSA) to the list of known hosts. executing program [ 484.249890][ T1522] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 484.489811][ T1522] usb 1-1: Using ep0 maxpacket: 8 [ 484.610056][ T1522] usb 1-1: config 3 has an invalid interface number: 239 but max is 1 [ 484.611935][ T1522] usb 1-1: config 3 has no interface number 1 [ 484.613267][ T1522] usb 1-1: config 3 interface 0 altsetting 0 endpoint 0xA has invalid wMaxPacketSize 0 [ 484.615337][ T1522] usb 1-1: config 3 interface 239 altsetting 9 has an invalid endpoint with address 0x0, skipping [ 484.617544][ T1522] usb 1-1: config 3 interface 239 has no altsetting 0 [ 484.769890][ T1522] usb 1-1: New USB device found, idVendor=0711, idProduct=0920, bcdDevice=eb.31 [ 484.771808][ T1522] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 484.773513][ T1522] usb 1-1: Product: syz [ 484.774393][ T1522] usb 1-1: Manufacturer: syz [ 484.775343][ T1522] usb 1-1: SerialNumber: syz [ 489.921712][ T1522] usb 1-1: USB2VGA dongle found at address 2 [ 489.926504][ T1522] usb 1-1: Allocated 8 output buffers [ 546.999953][ T5474] udevd[5474]: worker [5986] /devices/platform/dummy_hcd.0/usb1/1-1 is taking a long time [ 585.679829][ T1522] usb 1-1: Failed to early initialize device [ 585.810871][ T1522] usb 1-1: USB2VGA dongle found at address 2 [ 585.812914][ T1522] usb 1-1: Allocated 8 output buffers [ 666.915082][ T5474] udevd[5474]: worker [5986] /devices/platform/dummy_hcd.0/usb1/1-1 timeout; kill it [ 666.917569][ T5474] udevd[5474]: seq 10115 '/devices/platform/dummy_hcd.0/usb1/1-1' killed [ 666.921049][ T5474] udevd[5474]: worker [5986] terminated by signal 9 (Killed) [ 666.922802][ T5474] udevd[5474]: worker [5986] failed while handling '/devices/platform/dummy_hcd.0/usb1/1-1' [ 681.599839][ T1522] usb 1-1: Failed to early initialize device [ 681.605168][ T1522] usb 1-1: USB disconnect, device number 2 executing program executing program executing program [ 692.029829][ T1522] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 692.279790][ T1522] usb 1-1: Using ep0 maxpacket: 8 [ 692.399977][ T1522] usb 1-1: config 3 has an invalid interface number: 239 but max is 1 [ 692.401989][ T1522] usb 1-1: config 3 has no interface number 1 [ 692.403255][ T1522] usb 1-1: config 3 interface 0 altsetting 0 endpoint 0xA has invalid wMaxPacketSize 0 [ 692.405371][ T1522] usb 1-1: config 3 interface 239 altsetting 9 has an invalid endpoint with address 0x0, skipping [ 692.407715][ T1522] usb 1-1: config 3 interface 239 has no altsetting 0 [ 692.559938][ T1522] usb 1-1: New USB device found, idVendor=0711, idProduct=0920, bcdDevice=eb.31 [ 692.562050][ T1522] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 692.563887][ T1522] usb 1-1: Product: syz [ 692.564761][ T1522] usb 1-1: Manufacturer: syz [ 692.565794][ T1522] usb 1-1: SerialNumber: syz [ 697.751522][ T1522] usb 1-1: USB2VGA dongle found at address 3 [ 697.754936][ T1522] usb 1-1: Allocated 8 output buffers [ 754.827047][ T5474] udevd[5474]: worker [5996] /devices/platform/dummy_hcd.0/usb1/1-1 is taking a long time [ 793.519881][ T1522] usb 1-1: Failed to early initialize device [ 793.641002][ T1522] usb 1-1: USB2VGA dongle found at address 3 [ 793.643047][ T1522] usb 1-1: Allocated 8 output buffers [ 858.079977][ T28] INFO: task syz-executor388:6000 blocked for more than 143 seconds. [ 858.081734][ T28] Not tainted 6.3.0-rc4-syzkaller-g59caa87f9dfb #0 [ 858.083190][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 858.085008][ T28] task:syz-executor388 state:D stack:0 pid:6000 ppid:5984 flags:0x00000001 [ 858.086951][ T28] Call trace: [ 858.087646][ T28] __switch_to+0x320/0x754 [ 858.088629][ T28] __schedule+0x1048/0x1e38 [ 858.089590][ T28] schedule+0xc4/0x170 [ 858.090624][ T28] schedule_preempt_disabled+0x18/0x2c [ 858.091835][ T28] __mutex_lock_common+0xbd8/0x21a0 [ 858.093006][ T28] mutex_lock_nested+0x38/0x44 [ 858.094077][ T28] usbdev_open+0x13c/0x6c0 [ 858.095053][ T28] chrdev_open+0x3e8/0x4fc [ 858.096084][ T28] do_dentry_open+0x724/0xf90 [ 858.097068][ T28] vfs_open+0x7c/0x90 [ 858.097930][ T28] path_openat+0x1f2c/0x27f8 [ 858.098930][ T28] do_filp_open+0x1bc/0x3cc [ 858.099975][ T28] do_sys_openat2+0x128/0x3d8 [ 858.100929][ T28] __arm64_sys_openat+0x1f0/0x240 [ 858.102043][ T28] invoke_syscall+0x98/0x2c0 [ 858.103050][ T28] el0_svc_common+0x138/0x258 [ 858.104112][ T28] do_el0_svc+0x64/0x198 [ 858.105095][ T28] el0_svc+0x58/0x168 [ 858.105990][ T28] el0t_64_sync_handler+0x84/0xf0 [ 858.107021][ T28] el0t_64_sync+0x190/0x194 [ 858.107971][ T28] [ 858.107971][ T28] Showing all locks held in the system: [ 858.109615][ T28] 1 lock held by rcu_tasks_kthre/12: [ 858.110886][ T28] #0: ffff800015d36810 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 [ 858.113164][ T28] 1 lock held by rcu_tasks_trace/13: [ 858.114325][ T28] #0: ffff800015d37010 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 [ 858.116661][ T28] 1 lock held by khungtaskd/28: [ 858.117677][ T28] #0: ffff800015d36640 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 [ 858.119844][ T28] 5 locks held by kworker/0:2/1522: [ 858.120951][ T28] #0: ffff0000c13f7d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x664/0x12d4 [ 858.123312][ T28] #1: ffff8000225b7c20 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x6a8/0x12d4 [ 858.125788][ T28] #2: ffff0000ceaa4190 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c8/0x474c [ 858.127731][ T28] #3: ffff0000d2dd1190 (&dev->mutex){....}-{3:3}, at: __device_attach+0x90/0x434 [ 858.129835][ T28] #4: ffff0000cc332118 (&dev->mutex){....}-{3:3}, at: __device_attach+0x90/0x434 [ 858.131919][ T28] 2 locks held by getty/5625: [ 858.132926][ T28] #0: ffff0000d354c098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c [ 858.135002][ T28] #1: ffff80001a8602f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1210 [ 858.137205][ T28] 4 locks held by udevd/5996: [ 858.138281][ T28] #0: ffff0000d0fe41c8 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xac/0xc44 [ 858.140329][ T28] #1: ffff0000cf47a088 (&of->mutex){+.+.}-{3:3}, at: kernfs_seq_start+0x58/0x384 [ 858.142264][ T28] #2: ffff0000d37d0660 (kn->active#14){.+.+}-{0:0}, at: kernfs_seq_start+0x74/0x384 [ 858.144317][ T28] #3: ffff0000d2dd1190 (&dev->mutex){....}-{3:3}, at: manufacturer_show+0x30/0xac [ 858.146345][ T28] 1 lock held by syz-executor388/6000: [ 858.147520][ T28] #0: ffff0000ceaa4190 (&dev->mutex){....}-{3:3}, at: usbdev_open+0x13c/0x6c0 [ 858.149453][ T28] [ 858.149995][ T28] ============================================= [ 858.149995][ T28] [ 858.151868][ T28] Kernel panic - not syncing: hung_task: blocked tasks [ 858.153307][ T28] CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc4-syzkaller-g59caa87f9dfb #0 [ 858.155245][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 858.157475][ T28] Call trace: [ 858.158194][ T28] dump_backtrace+0x1b8/0x1e4 [ 858.159197][ T28] show_stack+0x2c/0x3c [ 858.160146][ T28] dump_stack_lvl+0xd0/0x124 [ 858.161192][ T28] dump_stack+0x1c/0x28 [ 858.162113][ T28] panic+0x2e0/0x7b8 [ 858.162963][ T28] hung_task_panic+0x0/0x2c [ 858.163969][ T28] kthread+0x24c/0x2d4 [ 858.164845][ T28] ret_from_fork+0x10/0x20 [ 858.165835][ T28] SMP: stopping secondary CPUs [ 858.166899][ T28] Kernel Offset: disabled [ 858.167926][ T28] CPU features: 0x000000,20700402,32017203 [ 858.169303][ T28] Memory Limit: none [ 858.498103][ T28] Rebooting in 86400 seconds..