team0 (unregistering): Port device team_slave_1 removed team0 (unregistering): Port device team_slave_0 removed bond0 (unregistering): Releasing backup interface bond_slave_1 bond0 (unregistering): Releasing backup interface bond_slave_0 bond0 (unregistering): Released all slaves BUG: workqueue lockup - pool cpus=1 node=0 flags=0x0 nice=0 stuck for 233s! Showing busy workqueues and worker pools: workqueue events: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=12/256 in-flight: 24:p9_read_work pending: rht_deferred_worker, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, defense_work_handler, cache_reap, p9_write_work, p9_poll_workfn BAR(12341), p9_write_work, switchdev_deferred_process_work ====================================================== WARNING: possible circular locking dependency detected 4.19.0-rc1-next-20180828+ #49 Not tainted ------------------------------------------------------ swapper/0/0 is trying to acquire lock: 0000000086ca2d0d (console_owner){-.-.}, at: log_next kernel/printk/printk.c:499 [inline] 0000000086ca2d0d (console_owner){-.-.}, at: console_unlock+0x7a7/0x10d0 kernel/printk/printk.c:2395 but task is already holding lock: 00000000383c33ff (&(&pool->lock)->rlock){-.-.}, at: show_workqueue_state.cold.50+0xb16/0x15ec kernel/workqueue.c:4557 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #4 (&(&pool->lock)->rlock){-.-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] __queue_work+0x352/0x12f0 kernel/workqueue.c:1417 queue_work_on+0x19a/0x1e0 kernel/workqueue.c:1486 queue_work include/linux/workqueue.h:512 [inline] schedule_work include/linux/workqueue.h:570 [inline] put_pwq+0x175/0x1c0 kernel/workqueue.c:1090 put_pwq_unlocked.part.30+0x34/0x70 kernel/workqueue.c:1107 put_pwq_unlocked kernel/workqueue.c:1101 [inline] destroy_workqueue+0x880/0x9d0 kernel/workqueue.c:4217 ucma_close+0x262/0x300 drivers/infiniband/core/ucma.c:1768 __fput+0x376/0x8a0 fs/file_table.c:279 ____fput+0x15/0x20 fs/file_table.c:312 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #3 (&pool->lock/1){..-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] __queue_work+0x352/0x12f0 kernel/workqueue.c:1417 queue_work_on+0x19a/0x1e0 kernel/workqueue.c:1486 queue_work include/linux/workqueue.h:512 [inline] tty_schedule_flip+0x14c/0x1d0 drivers/tty/tty_buffer.c:408 tty_flip_buffer_push+0x15/0x20 drivers/tty/tty_buffer.c:547 pty_write+0x19d/0x1f0 drivers/tty/pty.c:124 n_tty_write+0xc5b/0x11a0 drivers/tty/n_tty.c:2340 do_tty_write drivers/tty/tty_io.c:958 [inline] tty_write+0x3f1/0x880 drivers/tty/tty_io.c:1042 __vfs_write+0x117/0x9d0 fs/read_write.c:485 vfs_write+0x1fc/0x560 fs/read_write.c:549 ksys_write+0x101/0x260 fs/read_write.c:598 __do_sys_write fs/read_write.c:610 [inline] __se_sys_write fs/read_write.c:607 [inline] __x64_sys_write+0x73/0xb0 fs/read_write.c:607 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&(&port->lock)->rlock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 tty_port_tty_get+0x20/0x80 drivers/tty/tty_port.c:288 tty_port_default_wakeup+0x15/0x40 drivers/tty/tty_port.c:47 tty_port_tty_wakeup+0x5d/0x70 drivers/tty/tty_port.c:390 uart_write_wakeup+0x44/0x60 drivers/tty/serial/serial_core.c:103 serial8250_tx_chars+0x4be/0xb60 drivers/tty/serial/8250/8250_port.c:1806 serial8250_handle_irq.part.23+0x1ee/0x280 drivers/tty/serial/8250/8250_port.c:1879 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1865 [inline] serial8250_default_handle_irq+0xc8/0x150 drivers/tty/serial/8250/8250_port.c:1895 serial8250_interrupt+0xfa/0x1d0 drivers/tty/serial/8250/8250_core.c:125 __handle_irq_event_percpu+0x1c8/0xa50 kernel/irq/handle.c:149 handle_irq_event_percpu+0xa0/0x1d0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x20f/0x870 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:154 [inline] handle_irq+0x18c/0x2e7 arch/x86/kernel/irq_64.c:78 do_IRQ+0x80/0x1a0 arch/x86/kernel/irq.c:246 ret_from_intr+0x0/0x1e native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:56 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0xc2/0x410 arch/x86/kernel/process.c:498 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x3aa/0x580 kernel/sched/idle.c:262 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368 start_secondary+0x433/0x5d0 arch/x86/kernel/smpboot.c:271 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242 -> #1 (&port_lock_key){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 serial8250_console_write+0x8e5/0xb20 drivers/tty/serial/8250/8250_port.c:3247 univ8250_console_write+0x5f/0x70 drivers/tty/serial/8250/8250_core.c:590 call_console_drivers kernel/printk/printk.c:1726 [inline] console_unlock+0xace/0x10d0 kernel/printk/printk.c:2408 vprintk_emit+0x33a/0x910 kernel/printk/printk.c:1927 vprintk_default+0x28/0x30 kernel/printk/printk.c:1968 vprintk_func+0x7a/0x117 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:2001 register_console+0x7e7/0xc00 kernel/printk/printk.c:2723 univ8250_console_init+0x3f/0x4b drivers/tty/serial/8250/8250_core.c:685 console_init+0x5d4/0x891 kernel/printk/printk.c:2809 start_kernel+0x610/0x94e init/main.c:661 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:452 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:433 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242 -> #0 (console_owner){-.-.}: lock_acquire+0x1e4/0x4f0 kernel/locking/lockdep.c:3901 console_lock_spinning_enable kernel/printk/printk.c:1589 [inline] console_unlock+0x814/0x10d0 kernel/printk/printk.c:2405 vprintk_emit+0x33a/0x910 kernel/printk/printk.c:1927 vprintk_default+0x28/0x30 kernel/printk/printk.c:1968 vprintk_func+0x7a/0x117 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:2001 show_pwq kernel/workqueue.c:4464 [inline] show_workqueue_state.cold.50+0xcb8/0x15ec kernel/workqueue.c:4559 wq_watchdog_timer_fn+0x709/0x830 kernel/workqueue.c:5571 call_timer_fn+0x254/0x810 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7d2/0xc60 kernel/time/timer.c:1682 run_timer_softirq+0x31/0x40 kernel/time/timer.c:1697 __do_softirq+0x2eb/0xa74 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x1d6/0x210 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x18e/0x6a0 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:867 native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:56 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0xc2/0x410 arch/x86/kernel/process.c:498 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x3aa/0x580 kernel/sched/idle.c:262 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368 rest_init+0xe1/0xe4 init/main.c:442 start_kernel+0x913/0x94e init/main.c:739 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:452 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:433 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:242 other info that might help us debug this: Chain exists of: console_owner --> &pool->lock/1 --> &(&pool->lock)->rlock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&(&pool->lock)->rlock); lock(&pool->lock/1); lock(&(&pool->lock)->rlock); lock(console_owner); *** DEADLOCK *** 4 locks held by swapper/0/0: #0: 000000000895a926 ((&wq_watchdog_timer)){+.-.}, at: lockdep_copy_map include/linux/lockdep.h:178 [inline] #0: 000000000895a926 ((&wq_watchdog_timer)){+.-.}, at: call_timer_fn+0x1db/0x810 kernel/time/timer.c:1316 #1: 00000000a8973562 (rcu_read_lock_sched){....}, at: show_workqueue_state+0x0/0x1d0 kernel/workqueue.c:4423 #2: 00000000383c33ff (&(&pool->lock)->rlock){-.-.}, at: show_workqueue_state.cold.50+0xb16/0x15ec kernel/workqueue.c:4557 #3: 000000004a2e2375 (console_lock){+.+.}, at: console_trylock_spinning kernel/printk/printk.c:1651 [inline] #3: 000000004a2e2375 (console_lock){+.+.}, at: vprintk_emit+0x31f/0x910 kernel/printk/printk.c:1926 stack backtrace: CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.0-rc1-next-20180828+ #49 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 print_circular_bug.isra.34.cold.55+0x1bd/0x27d kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1862 [inline] check_prevs_add kernel/locking/lockdep.c:1975 [inline] validate_chain kernel/locking/lockdep.c:2416 [inline] __lock_acquire+0x3449/0x5020 kernel/locking/lockdep.c:3412 lock_acquire+0x1e4/0x4f0 kernel/locking/lockdep.c:3901 console_lock_spinning_enable kernel/printk/printk.c:1589 [inline] console_unlock+0x814/0x10d0 kernel/printk/printk.c:2405 vprintk_emit+0x33a/0x910 kernel/printk/printk.c:1927 vprintk_default+0x28/0x30 kernel/printk/printk.c:1968 vprintk_func+0x7a/0x117 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:2001 show_pwq kernel/workqueue.c:4464 [inline] show_workqueue_state.cold.50+0xcb8/0x15ec kernel/workqueue.c:4559 wq_watchdog_timer_fn+0x709/0x830 kernel/workqueue.c:5571 call_timer_fn+0x254/0x810 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7d2/0xc60 kernel/time/timer.c:1682 run_timer_softirq+0x31/0x40 kernel/time/timer.c:1697 __do_softirq+0x2eb/0xa74 kernel/softirq.c:292 ? do Lost 56 message(s)! workqueue events_long: flags=0x0 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256 pending: br_fdb_cleanup, br_fdb_cleanup, br_fdb_cleanup workqueue events_unbound: flags=0x2 pwq 4: cpus=0-1 flags=0x4 nice=0 active=4/512 in-flight: 389:fsnotify_connector_destroy_workfn fsnotify_connector_destroy_workfn, 7:fsnotify_mark_destroy_workfn fsnotify_mark_destroy_workfn workqueue events_power_efficient: flags=0x80 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256 pending: do_cache_clean, device_uncache_fw_images_work, check_lifetime pwq 0: cpus=0 node=0 flags=0x0 nice=0 active=1/256 pending: gc_worker workqueue rcu_gp: flags=0x8 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=3/256 pending: process_srcu, process_srcu, process_srcu workqueue mm_percpu_wq: flags=0x8 pwq 2: cpus=1 node=0 flags=0x0 nice=0 active=1/256 pending: vmstat_update pool 2: cpus=1 node=0 flags=0x0 nice=0 hung=235s workers=5 idle: 18 4848 8888 1882 pool 4: cpus=0-1 flags=0x4 nice=0 hung=3s workers=5 idle: 53 6871 6489 INFO: task kworker/u4:0:7 blocked for more than 140 seconds. Not tainted 4.19.0-rc1-next-20180828+ #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:0 D21624 7 2 0x80000000 Workqueue: events_unbound fsnotify_mark_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x430/0x8d0 kernel/sched/completion.c:136 __synchronize_srcu+0x189/0x240 kernel/rcu/srcutree.c:934 synchronize_srcu+0x41c/0x56f kernel/rcu/srcutree.c:1012 fsnotify_mark_destroy_workfn+0x1be/0x550 fs/notify/mark.c:772 process_one_work+0xc73/0x1aa0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 INFO: task kworker/u4:3:389 blocked for more than 140 seconds. Not tainted 4.19.0-rc1-next-20180828+ #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/u4:3 D13368 389 2 0x80000000 Workqueue: events_unbound fsnotify_connector_destroy_workfn Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x430/0x8d0 kernel/sched/completion.c:136 __synchronize_srcu+0x189/0x240 kernel/rcu/srcutree.c:934 synchronize_srcu_expedited kernel/rcu/srcutree.c:959 [inline] synchronize_srcu+0x335/0x56f kernel/rcu/srcutree.c:1010 fsnotify_connector_destroy_workfn+0x44/0xa0 fs/notify/mark.c:174 process_one_work+0xc73/0x1aa0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 INFO: task syz-executor6:12341 blocked for more than 140 seconds. Not tainted 4.19.0-rc1-next-20180828+ #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor6 D22488 12341 4419 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x430/0x8d0 kernel/sched/completion.c:136 __flush_work+0x59f/0x9c0 kernel/workqueue.c:2917 flush_work+0x17/0x20 kernel/workqueue.c:2938 p9_mux_poll_stop net/9p/trans_fd.c:189 [inline] p9_conn_destroy net/9p/trans_fd.c:863 [inline] p9_fd_close+0x35e/0x5c0 net/9p/trans_fd.c:891 p9_client_create+0xa41/0x159b net/9p/client.c:1065 v9fs_session_init+0x21a/0x1a80 fs/9p/v9fs.c:400 v9fs_mount+0x7c/0x900 fs/9p/vfs_super.c:135 legacy_get_tree+0x131/0x460 fs/fs_context.c:732 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1746 do_new_mount fs/namespace.c:2627 [inline] do_mount+0x6f9/0x1e30 fs/namespace.c:2951 ksys_mount+0x12d/0x140 fs/namespace.c:3167 __do_sys_mount fs/namespace.c:3181 [inline] __se_sys_mount fs/namespace.c:3178 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3178 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: 08 e8 3b a9 fb ff 48 8b 44 24 20 48 8b 4c 24 18 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48 89 04 24 <48> 89 5c 24 08 e8 0d a9 fb ff 48 8b 44 24 40 48 8b 4c 24 48 48 8b RSP: 002b:00007ff985273c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff9852746d4 RCX: 0000000000457089 RDX: 0000000020000340 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 0000000000930140 R08: 00000000200003c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d2838 R14: 00000000004c7c60 R15: 0000000000000001 INFO: task syz-executor5:12355 blocked for more than 140 seconds. Not tainted 4.19.0-rc1-next-20180828+ #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D23272 12355 4421 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x430/0x8d0 kernel/sched/completion.c:136 __synchronize_srcu+0x189/0x240 kernel/rcu/srcutree.c:934 synchronize_srcu_expedited+0x18/0x20 kernel/rcu/srcutree.c:959 install_new_memslots+0x20a/0x4b0 arch/x86/kvm/../../../virt/kvm/kvm_main.c:885 __kvm_set_memory_region+0x1be6/0x2e60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1060 kvm_set_memory_region+0x2e/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1083 kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1095 [inline] kvm_vm_ioctl+0x664/0x1d80 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2987 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x456ef7 Code: 48 8d 05 2d f4 46 00 48 89 04 24 48 c7 44 24 08 1c 00 00 00 e8 ea 49 fd ff 0f 0b e8 63 30 00 00 eb c1 cc 64 48 8b 0c 25 f8 ff ff 48 3b 61 10 0f 86 bd 02 00 00 48 83 ec 58 48 89 6c 24 50 48 RSP: 002b:00007f6e9d305098 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 0000000000456ef7 RDX: 00007f6e9d305510 RSI: 000000004020ae46 RDI: 0000000000000006 RBP: 0000000020010000 R08: 0000000000000001 R09: 0000000000000028 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000fec00000 R13: 0000000000000006 R14: 00000000004c9c0e R15: 0000000000000001 INFO: task syz-executor5:12368 blocked for more than 140 seconds. Not tainted 4.19.0-rc1-next-20180828+ #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor5 D25016 12368 4421 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1003 [inline] __mutex_lock+0xbf9/0x1700 kernel/locking/mutex.c:1073 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088 kvm_set_memory_region+0x23/0x50 arch/x86/kvm/../../../virt/kvm/kvm_main.c:1082 kvm_vm_ioctl_set_memory_region arch/x86/kvm/../../../virt/kvm/kvm_main.c:1095 [inline] kvm_vm_ioctl+0x664/0x1d80 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2987 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: 08 e8 3b a9 fb ff 48 8b 44 24 20 48 8b 4c 24 18 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48 89 04 24 <48> 89 5c 24 08 e8 0d a9 fb ff 48 8b 44 24 40 48 8b 4c 24 48 48 8b RSP: 002b:00007f6e9d2e5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f6e9d2e66d4 RCX: 0000000000457089 RDX: 0000000020000000 RSI: 000000004020ae46 RDI: 0000000000000006 RBP: 00000000009301e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cf160 R14: 00000000004be9e8 R15: 0000000000000002 INFO: task syz-executor7:12361 blocked for more than 140 seconds. Not tainted 4.19.0-rc1-next-20180828+ #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor7 D22784 12361 4422 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 schedule_timeout+0x1cc/0x260 kernel/time/timer.c:1780 do_wait_for_common kernel/sched/completion.c:83 [inline] __wait_for_common kernel/sched/completion.c:104 [inline] wait_for_common kernel/sched/completion.c:115 [inline] wait_for_completion+0x430/0x8d0 kernel/sched/completion.c:136 __synchronize_srcu+0x189/0x240 kernel/rcu/srcutree.c:934 synchronize_srcu_expedited kernel/rcu/srcutree.c:959 [inline] synchronize_srcu+0x335/0x56f kernel/rcu/srcutree.c:1010 tracepoint_synchronize_unregister include/linux/tracepoint.h:84 [inline] perf_trace_event_unreg.isra.3+0xcb/0x220 kernel/trace/trace_event_perf.c:163 perf_trace_destroy+0xc1/0x100 kernel/trace/trace_event_perf.c:238 tp_perf_event_destroy+0x15/0x20 kernel/events/core.c:8329 _free_event+0x414/0x15e0 kernel/events/core.c:4445 put_event+0x48/0x60 kernel/events/core.c:4531 perf_event_release_kernel+0x8d1/0xfc0 kernel/events/core.c:4637 perf_release+0x37/0x50 kernel/events/core.c:4647 __fput+0x376/0x8a0 fs/file_table.c:279 ____fput+0x15/0x20 fs/file_table.c:312 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: 08 e8 3b a9 fb ff 48 8b 44 24 20 48 8b 4c 24 18 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48 89 04 24 <48> 89 5c 24 08 e8 0d a9 fb ff 48 8b 44 24 40 48 8b 4c 24 48 48 8b RSP: 002b:00007f03120dfc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 00007f03120e06d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cb500 R14: 00000000004ee172 R15: 0000000000000000 INFO: task syz-executor3:12373 blocked for more than 140 seconds. Not tainted 4.19.0-rc1-next-20180828+ #49 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D24680 12373 4415 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x87c/0x1df0 kernel/sched/core.c:3473 schedule+0xfb/0x450 kernel/sched/core.c:3517 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3575 __mutex_lock_common kernel/locking/mutex.c:1003 [inline] __mutex_lock+0xbf9/0x1700 kernel/locking/mutex.c:1073 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1088 perf_trace_init+0x50/0x250 kernel/trace/trace_event_perf.c:218 perf_tp_event_init+0xa6/0x120 kernel/events/core.c:8345 perf_try_init_event+0x137/0x2f0 kernel/events/core.c:9739 perf_init_event kernel/events/core.c:9777 [inline] perf_event_alloc.part.93+0x12a0/0x33c0 kernel/events/core.c:10043 perf_event_alloc kernel/events/core.c:10399 [inline] __do_sys_perf_event_open+0xa9c/0x2f30 kernel/events/core.c:10500 __se_sys_perf_event_open kernel/events/core.c:10389 [inline] __x64_sys_perf_event_open+0xbe/0x150 kernel/events/core.c:10389 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457089 Code: 08 e8 3b a9 fb ff 48 8b 44 24 20 48 8b 4c 24 18 48 8b 54 24 38 48 8b 7c 24 48 eb 8d 48 8b 6c 24 50 48 83 c4 58 c3 48 89 04 24 <48> 89 5c 24 08 e8 0d a9 fb ff 48 8b 44 24 40 48 8b 4c 24 48 48 8b RSP: 002b:00007f22f908ac78 EFLAGS: 00000246 ORIG_RAX: 000000000000012a RAX: ffffffffffffffda RBX: 00007f22f908b6d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000002025c000 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffffffffffff R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004d3300 R14: 00000000004c8290 R15: 0000000000000000 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 774 Comm: khungtaskd Not tainted 4.19.0-rc1-next-20180828+ #49 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x48/0x88 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x151/0x192 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb39/0x1040 kernel/hung_task.c:265 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.150 msecs NMI backtrace for cpu 1 CPU: 1 PID: 24 Comm: kworker/1:1 Not tainted 4.19.0-rc1-next-20180828+ #49 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events p9_read_work RIP: 0010:__read_once_size include/linux/compiler.h:188 [inline] RIP: 0010:hlist_empty include/linux/list.h:671 [inline] RIP: 0010:perf_trace_lock_acquire+0x1f2/0x9a0 include/trace/events/lock.h:13 Code: 48 c1 ea 03 c6 04 32 00 4c 89 ea 48 c1 ea 03 80 3c 32 00 0f 85 30 05 00 00 48 89 c7 49 8b 55 00 48 be 00 00 00 00 00 fc ff df <48> c1 ef 03 80 3c 37 00 0f 85 54 07 00 00 48 c1 e8 03 49 89 54 24 RSP: 0018:ffff8801d985ebc0 EFLAGS: 00000046 RAX: ffff8801d985ed30 RBX: 1ffff1003b30bd82 RCX: ffff8801d985ec30 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffff8801d985ed30 RBP: ffff8801d985ed98 R08: 0000000000000000 R09: ffff8801ce28b3a0 R10: dffffc0000000000 R11: ffffffff815e9710 R12: ffff8801d985ed70 R13: ffffe8ffffd9b5e0 R14: 0000000000000025 R15: ffffffff87f7c9c0 FS: 0000000000000000(0000) GS:ffff8801db100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000fa6000 CR3: 00000001cc02a000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_lock_acquire include/trace/events/lock.h:13 [inline] lock_acquire+0x374/0x4f0 kernel/locking/lockdep.c:3900 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:329 [inline] __snd_pcm_stream_lock_mode+0xc0/0x150 sound/core/pcm_native.c:125 snd_pcm_stream_lock_irq sound/core/pcm_native.c:189 [inline] snd_pcm_delay+0x29/0x380 sound/core/pcm_native.c:2692 snd_pcm_kernel_ioctl+0x1e0/0x220 sound/core/pcm_native.c:2996 snd_pcm_oss_capture_position_fixup+0x197/0x240 sound/core/oss/pcm_oss.c:1202 snd_pcm_oss_read3+0x183/0x410 sound/core/oss/pcm_oss.c:1271 io_capture_transfer+0x274/0x310 sound/core/oss/io.c:73 snd_pcm_plug_read_transfer+0x1d7/0x3b0 sound/core/oss/pcm_plugin.c:651 snd_pcm_oss_read2+0x222/0x470 sound/core/oss/pcm_oss.c:1474 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1512 [inline] snd_pcm_oss_read+0x4e4/0x820 sound/core/oss/pcm_oss.c:2752 __vfs_read+0x117/0x9b0 fs/read_write.c:416 vfs_read+0x17f/0x3c0 fs/read_write.c:452 kernel_read+0xab/0x120 fs/read_write.c:431 p9_fd_read net/9p/trans_fd.c:277 [inline] p9_read_work+0x2ec/0x1100 net/9p/trans_fd.c:313 process_one_work+0xc73/0x1aa0 kernel/workqueue.c:2153 worker_thread+0x189/0x13c0 kernel/workqueue.c:2296 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:415