INFO: task kworker/1:2:135 blocked for more than 143 seconds. Not tainted 5.16.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/1:2 state:D stack:25640 pid: 135 ppid: 2 flags:0x00004000 Workqueue: usb_hub_wq hub_event Call Trace: context_switch kernel/sched/core.c:4972 [inline] __schedule+0xa9a/0x4900 kernel/sched/core.c:6253 schedule+0xd2/0x260 kernel/sched/core.c:6326 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385 __mutex_lock_common kernel/locking/mutex.c:680 [inline] __mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740 hub_port_connect drivers/usb/core/hub.c:5250 [inline] hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] port_event drivers/usb/core/hub.c:5643 [inline] hub_event+0x1e40/0x4460 drivers/usb/core/hub.c:5725 process_one_work+0x9b2/0x1660 kernel/workqueue.c:2298 worker_thread+0x65d/0x1130 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458 5 locks held by kworker/1:2/135: #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x896/0x1660 kernel/workqueue.c:2269 #1: ffffc900027bfdb0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1660 kernel/workqueue.c:2273 #2: ffff88801df71220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff88801df71220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4460 drivers/usb/core/hub.c:5671 #3: ffff8881476345c0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3086 [inline] #3: ffff8881476345c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5249 [inline] #3: ffff8881476345c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] #3: ffff8881476345c0 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] #3: ffff8881476345c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1e17/0x4460 drivers/usb/core/hub.c:5725 #4: ffff88801dd0e768 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5250 [inline] #4: ffff88801dd0e768 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] #4: ffff88801dd0e768 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] #4: ffff88801dd0e768 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x1e40/0x4460 drivers/usb/core/hub.c:5725 2 locks held by getty/3284: #0: ffff88814b141098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252 #1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113 3 locks held by kworker/0:3/3625: #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x896/0x1660 kernel/workqueue.c:2269 #1: ffffc9000290fdb0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1660 kernel/workqueue.c:2273 #2: ffff8881477d3220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff8881477d3220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4460 drivers/usb/core/hub.c:5671 5 locks held by syz-executor.2/3721: 2 locks held by kworker/u4:31/21398: #0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478 #1: ffffc90005b87db0 ((work_completion)(&(&bat_priv->nc.work)->work)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1660 kernel/workqueue.c:2273 5 locks held by kworker/0:7/23730: #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x896/0x1660 kernel/workqueue.c:2269 #1: ffffc900108d7db0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1660 kernel/workqueue.c:2273 #2: ffff88801de9a220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff88801de9a220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4460 drivers/usb/core/hub.c:5671 #3: ffff88801de9e5c0 ( &port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3086 [inline] &port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5249 [inline] &port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] &port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] &port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1e17/0x4460 drivers/usb/core/hub.c:5725 #4: ffff88801dd0e768 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5250 [inline] #4: ffff88801dd0e768 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] #4: ffff88801dd0e768 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] #4: ffff88801dd0e768 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x1e40/0x4460 drivers/usb/core/hub.c:5725 3 locks held by kworker/u4:0/30856: 6 locks held by kworker/1:9/3434: #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1198 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:635 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:662 [inline] #0: ffff888011bd5d38 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work+0x896/0x1660 kernel/workqueue.c:2269 #1: ffffc90005bb7db0 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work+0x8ca/0x1660 kernel/workqueue.c:2273 #2: ffff888147647220 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:760 [inline] #2: ffff888147647220 (&dev->mutex){....}-{3:3}, at: hub_event+0x1c1/0x4460 drivers/usb/core/hub.c:5671 #3: ffff88801df9a5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: usb_lock_port drivers/usb/core/hub.c:3086 [inline] ffff88801df9a5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5249 [inline] ffff88801df9a5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] ffff88801df9a5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] ffff88801df9a5c0 (&port_dev->status_lock){+.+.}-{3:3}, at: hub_event+0x1e17/0x4460 drivers/usb/core/hub.c:5725 #4: ffff88801dddec68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect drivers/usb/core/hub.c:5250 [inline] #4: ffff88801dddec68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] #4: ffff88801dddec68 (hcd->address0_mutex){+.+.}-{3:3}, at: port_event drivers/usb/core/hub.c:5643 [inline] #4: ffff88801dddec68 (hcd->address0_mutex){+.+.}-{3:3}, at: hub_event+0x1e40/0x4460 drivers/usb/core/hub.c:5725 #5: ffffffff8ca35b70 (ehci_cf_port_reset_rwsem){.+.+}-{3:3}, at: hub_port_reset+0x191/0x1ba0 drivers/usb/core/hub.c:2948 5 locks held by syz-executor.4/18181: #0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478 #1: ffff8880b9c279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880 #2: ffff88801ff10228 (&(&sig->stats_lock)->lock){....}-{2:2}, at: spin_lock include/linux/spinlock.h:349 [inline] #2: ffff88801ff10228 (&(&sig->stats_lock)->lock){....}-{2:2}, at: write_seqlock include/linux/seqlock.h:890 [inline] #2: ffff88801ff10228 (&(&sig->stats_lock)->lock){....}-{2:2}, at: __exit_signal kernel/exit.c:135 [inline] #2: ffff88801ff10228 (&(&sig->stats_lock)->lock){....}-{2:2}, at: release_task+0x537/0x17e0 kernel/exit.c:200 #3: ffff88801ff101e0 (&____s->seqcount#5){....}-{0:0}, at: exit_notify kernel/exit.c:705 [inline] #3: ffff88801ff101e0 (&____s->seqcount#5){....}-{0:0}, at: do_exit+0x15f9/0x2b40 kernel/exit.c:852 #4: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: is_bpf_text_address+0x0/0x170 kernel/bpf/core.c:702 1 lock held by syz-executor.3/18523: #0: ffff8880b9d39a98 ( &rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478 1 lock held by syz-executor.4/18578: #0: ffff8880b9c39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478 2 locks held by syz-executor.1/18690: 1 lock held by syz-executor.4/18981: 5 locks held by syz-executor.4/18983: 5 locks held by syz-executor.2/19073: #0: ffff888076d90870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:1034 #1: ffff88807f3b2460 ( sb_writers#8){.+.+}-{0:0}, at: psi_task_switch+0x3a6/0x490 kernel/sched/psi.c:880 #2: ffff8880b9d279c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_enqueue kernel/sched/stats.h:131 [inline] (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: enqueue_task kernel/sched/core.c:1995 [inline] (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: activate_task kernel/sched/core.c:2024 [inline] (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: ttwu_do_activate+0x2b4/0x7b0 kernel/sched/core.c:3600 #3: ffff88801dee5748 (kn->active#240){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2ab/0x500 fs/kernfs/file.c:288 #4: ffff88801459a698 (&p->pi_lock){-.-.}-{2:2}, at: try_to_wake_up+0xab/0x15a0 kernel/sched/core.c:4003 8 locks held by syz-executor.4/19456: 5 locks held by syz-executor.1/19462: 5 locks held by syz-executor.2/19469: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 21398 Comm: kworker/u4:31 Not tainted 5.16.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:__sanitizer_cov_trace_cmp4+0xc/0x70 kernel/kcov.c:260 Code: e8 48 c7 44 38 e0 07 00 00 00 48 89 4c 38 f0 4e 89 54 c8 20 48 89 10 c3 66 0f 1f 44 00 00 41 89 f8 bf 03 00 00 00 4c 8b 14 24 <89> f1 65 48 8b 34 25 40 70 02 00 e8 34 f8 ff ff 84 c0 74 4b 48 8b RSP: 0018:ffffc90005b87c88 EFLAGS: 00000246 RAX: ffff88801d1f7880 RBX: 0000000000000400 RCX: ffffc90005b87c18 RDX: 1ffff1100bfbd4ea RSI: 0000000000000400 RDI: 0000000000000003 RBP: 0000000000000001 R08: 0000000000000306 R09: 0000000000000000 R10: ffffffff88e034b1 R11: 0000000000000000 R12: 0000000000000001 R13: 0000000000000000 R14: dffffc0000000000 R15: 0000000000000306 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3b9541b1b8 CR3: 000000007f086000 CR4: 0000000000350ee0 Call Trace: batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:409 [inline] batadv_nc_worker+0x8a1/0xfa0 net/batman-adv/network-coding.c:723 process_one_work+0x9b2/0x1660 kernel/workqueue.c:2298 worker_thread+0x65d/0x1130 kernel/workqueue.c:2445 kthread+0x405/0x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: e8 48 c7 44 38 callq 0x3844c74d 5: e0 07 loopne 0xe 7: 00 00 add %al,(%rax) 9: 00 48 89 add %cl,-0x77(%rax) c: 4c 38 f0 rex.WR cmp %r14b,%al f: 4e 89 54 c8 20 mov %r10,0x20(%rax,%r9,8) 14: 48 89 10 mov %rdx,(%rax) 17: c3 retq 18: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 1e: 41 89 f8 mov %edi,%r8d 21: bf 03 00 00 00 mov $0x3,%edi 26: 4c 8b 14 24 mov (%rsp),%r10 * 2a: 89 f1 mov %esi,%ecx <-- trapping instruction 2c: 65 48 8b 34 25 40 70 mov %gs:0x27040,%rsi 33: 02 00 35: e8 34 f8 ff ff callq 0xfffff86e 3a: 84 c0 test %al,%al 3c: 74 4b je 0x89 3e: 48 rex.W 3f: 8b .byte 0x8b