A link change request failed with some changes committed already. Interface gretap0 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface erspan0 may have been left with an inconsistent configuration, please check. INFO: task kworker/1:1:24 blocked for more than 120 seconds. Not tainted 4.17.0-rc1+ #8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/1:1 D19368 24 2 0x80000000 Workqueue: events cgwb_release_workfn Call Trace: context_switch kernel/sched/core.c:2848 [inline] __schedule+0x801/0x1e30 kernel/sched/core.c:3490 schedule+0xef/0x430 kernel/sched/core.c:3549 bit_wait+0x18/0x90 kernel/sched/wait_bit.c:197 __wait_on_bit+0xb3/0x130 kernel/sched/wait_bit.c:48 out_of_line_wait_on_bit+0x204/0x3a0 kernel/sched/wait_bit.c:63 wait_on_bit include/linux/wait_bit.h:76 [inline] wb_shutdown+0x370/0x470 mm/backing-dev.c:366 cgwb_release_workfn+0x87/0x750 mm/backing-dev.c:509 process_one_work+0xc1e/0x1b50 kernel/workqueue.c:2145 worker_thread+0x1cc/0x1440 kernel/workqueue.c:2279 kthread+0x345/0x410 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Showing all locks held in the system: 2 locks held by kworker/1:1/24: #0: 000000003c072691 ((wq_completion)"events"){+.+.}, at: __write_once_size include/linux/compiler.h:215 [inline] #0: 000000003c072691 ((wq_completion)"events"){+.+.}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: 000000003c072691 ((wq_completion)"events"){+.+.}, at: atomic64_set include/asm-generic/atomic-instrumented.h:40 [inline] #0: 000000003c072691 ((wq_completion)"events"){+.+.}, at: atomic_long_set include/asm-generic/atomic-long.h:57 [inline] #0: 000000003c072691 ((wq_completion)"events"){+.+.}, at: set_work_data kernel/workqueue.c:617 [inline] #0: 000000003c072691 ((wq_completion)"events"){+.+.}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: 000000003c072691 ((wq_completion)"events"){+.+.}, at: process_one_work+0xaef/0x1b50 kernel/workqueue.c:2116 #1: 0000000015aa303f ((work_completion)(&wb->release_work)){+.+.}, at: process_one_work+0xb46/0x1b50 kernel/workqueue.c:2120 2 locks held by khungtaskd/891: #0: 00000000dd1ae645 (rcu_read_lock){....}, at: check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: 00000000dd1ae645 (rcu_read_lock){....}, at: watchdog+0x1ff/0xf60 kernel/hung_task.c:249 #1: 00000000f3fe2f76 (tasklist_lock){.+.+}, at: debug_show_all_locks+0xde/0x34a kernel/locking/lockdep.c:4470 2 locks held by getty/4476: #0: 000000005e08d83e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000009e43a0d0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4477: #0: 000000000f65463b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000008e4ae327 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4478: #0: 0000000083796abb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000e801048e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4479: #0: 00000000243f09de (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 0000000006ae07ba (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4480: #0: 00000000d8c263ad (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 0000000035febd22 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4481: #0: 0000000086d2ae25 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 00000000bb94dfb4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 2 locks held by getty/4482: #0: 00000000064cbf19 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: 000000003b7edcae (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x321/0x1cc0 drivers/tty/n_tty.c:2131 3 locks held by syz-executor0/23990: #0: 0000000089bfdf08 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1a9/0x1e0 fs/file.c:766 #1: 000000009a1283e9 (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2718 [inline] #1: 000000009a1283e9 (sb_writers#4){.+.+}, at: vfs_write+0x452/0x560 fs/read_write.c:548 #2: 00000000fd963b69 (&sb->s_type->i_mutex_key#10){++++}, at: inode_trylock include/linux/fs.h:733 [inline] #2: 00000000fd963b69 (&sb->s_type->i_mutex_key#10){++++}, at: ext4_file_write_iter+0x299/0x1420 fs/ext4/file.c:232 3 locks held by syz-executor0/24038: #0: 000000009a1283e9 (sb_writers#4){.+.+}, at: sb_start_write include/linux/fs.h:1550 [inline] #0: 000000009a1283e9 (sb_writers#4){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:386 #1: 00000000daea0438 (&type->i_mutex_dir_key/1){+.+.}, at: inode_lock_nested include/linux/fs.h:748 [inline] #1: 00000000daea0438 (&type->i_mutex_dir_key/1){+.+.}, at: filename_create+0x1aa/0x5a0 fs/namei.c:3606 #2: 00000000fd963b69 (&sb->s_type->i_mutex_key#10){++++}, at: inode_lock include/linux/fs.h:713 [inline] #2: 00000000fd963b69 (&sb->s_type->i_mutex_key#10){++++}, at: vfs_link+0x543/0xb70 fs/namei.c:4202 3 locks held by syz-executor4/23996: #0: 00000000d98ff2a1 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1a9/0x1e0 fs/file.c:766 #1: 000000009a1283e9 (sb_writers#4){.+.+}, at: file_start_write include/linux/fs.h:2718 [inline] #1: 000000009a1283e9 (sb_writers#4){.+.+}, at: vfs_write+0x452/0x560 fs/read_write.c:548 #2: 00000000372e43e7 (&sb->s_type->i_mutex_key#10){++++}, at: inode_trylock include/linux/fs.h:733 [inline] #2: 00000000372e43e7 (&sb->s_type->i_mutex_key#10){++++}, at: ext4_file_write_iter+0x299/0x1420 fs/ext4/file.c:232 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 891 Comm: khungtaskd Not tainted 4.17.0-rc1+ #8 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+0x1b9/0x294 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.4+0x19/0xce lib/nmi_backtrace.c:103 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:138 [inline] check_hung_task kernel/hung_task.c:132 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:190 [inline] watchdog+0xc10/0xf60 kernel/hung_task.c:249 kthread+0x345/0x410 kernel/kthread.c:238 netlink: 'syz-executor5': attribute type 1 has an invalid length. ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:412 Sending NMI from CPU 1 to CPUs 0: netlink: 'syz-executor5': attribute type 3 has an invalid length. NMI backtrace for cpu 0 CPU: 0 PID: 24040 Comm: syz-executor5 Not tainted 4.17.0-rc1+ #8 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:2315 [inline] RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:2334 [inline] RIP: 0010:validate_chain kernel/locking/lockdep.c:2388 [inline] RIP: 0010:__lock_acquire+0xed4/0x5140 kernel/locking/lockdep.c:3431 RSP: 0018:ffff8801dae073c0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffffffff89be0248 RCX: 00000000161415aa RDX: 1ffffffff137c04b RSI: ffff88019284eb38 RDI: ffffffff89be0258 RBP: ffff8801dae07748 R08: 00000000000064f6 R09: 0000000000000003 R10: ffff88019284ebb0 R11: ffff88019284e300 R12: 1ffff1003b5c0ea0 R13: 0000000000000000 R14: b6cfac1ee2d69e02 R15: 0000000000000000 FS: 00007f6ab4bee700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020b3dfc8 CR3: 00000001ad1bc000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1dc/0x520 kernel/locking/lockdep.c:3920 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 debug_object_deactivate+0xe1/0x400 lib/debugobjects.c:538 debug_timer_deactivate kernel/time/timer.c:714 [inline] debug_deactivate kernel/time/timer.c:770 [inline] detach_timer kernel/time/timer.c:815 [inline] expire_timers kernel/time/timer.c:1353 [inline] __run_timers+0x569/0xc50 kernel/time/timer.c:1666 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1692 __do_softirq+0x2e0/0xaf5 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1d1/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:525 [inline] smp_apic_timer_interrupt+0x17e/0x710 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:863 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:783 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1678 [inline] RIP: 0010:vprintk_emit+0xbd0/0xdd0 kernel/printk/printk.c:1906 RSP: 0018:ffff8801c2687130 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000200 RCX: ffffc90002193000 RDX: 00000000000190b5 RSI: ffffffff8160bc47 RDI: 0000000000000202 RBP: ffff8801c26872c0 R08: ffff88019284eb38 R09: 0000000000000006 R10: ffff88019284e300 R11: 0000000000000000 R12: 1ffffffff11a312d R13: 0000000000000041 R14: ffffed00384d0e43 R15: ffffffff8a6d1360 vprintk_default+0x28/0x30 kernel/printk/printk.c:1947 vprintk_func+0x7a/0xe7 kernel/printk/printk_safe.c:379 printk+0x9e/0xba kernel/printk/printk.c:1980 validate_nla.cold.9+0x23/0x59 lib/nlattr.c:85 nla_parse+0x3ac/0x4a0 lib/nlattr.c:254 nlmsg_parse include/net/netlink.h:398 [inline] genl_family_rcv_msg+0x5e8/0x1120 net/netlink/genetlink.c:577 genl_rcv_msg+0xc6/0x170 net/netlink/genetlink.c:624 netlink_rcv_skb+0x172/0x440 net/netlink/af_netlink.c:2448 genl_rcv+0x28/0x40 net/netlink/genetlink.c:635 netlink_unicast_kernel net/netlink/af_netlink.c:1310 [inline] netlink_unicast+0x58b/0x740 net/netlink/af_netlink.c:1336 netlink_sendmsg+0x9f0/0xfa0 net/netlink/af_netlink.c:1901 sock_sendmsg_nosec net/socket.c:629 [inline] sock_sendmsg+0xd5/0x120 net/socket.c:639 ___sys_sendmsg+0x805/0x940 net/socket.c:2117 __sys_sendmsg+0x115/0x270 net/socket.c:2155 __do_sys_sendmsg net/socket.c:2164 [inline] __se_sys_sendmsg net/socket.c:2162 [inline] __x64_sys_sendmsg+0x78/0xb0 net/socket.c:2162 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x455379 RSP: 002b:00007f6ab4bedc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f6ab4bee6d4 RCX: 0000000000455379 RDX: 0000000000000000 RSI: 0000000020b3dfc8 RDI: 0000000000000013 RBP: 000000000072bf58 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004f8 R14: 00000000006fa7e0 R15: 0000000000000001 Code: 00 fc ff df 41 c6 04 04 f8 48 85 db 0f 84 f8 00 00 00 48 83 fb 08 0f 84 ee 00 00 00 48 8d 7b 10 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 17 3b 00 00 4c 3b 73 10 0f 84 3d fb ff ff 48 8d 8c 24 80 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.510 msecs