kernel msg: ebtables bug: please report to author: Total nentries is wrong kernel msg: ebtables bug: please report to author: Total nentries is wrong IPVS: sync thread started: state = BACKUP, mcast_ifn = sit0, syncid = 0, id = 0 IPVS: stopping backup sync thread 8671 ... INFO: task kworker/0:0:3 blocked for more than 120 seconds. Not tainted 4.16.0-rc7+ #3 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. kworker/0:0 D20928 3 2 0x80000000 Workqueue: cgroup_destroy css_killed_work_fn Call Trace: context_switch kernel/sched/core.c:2862 [inline] __schedule+0x8fb/0x1ec0 kernel/sched/core.c:3440 schedule+0xf5/0x430 kernel/sched/core.c:3499 schedule_preempt_disabled+0x10/0x20 kernel/sched/core.c:3557 __mutex_lock_common kernel/locking/mutex.c:833 [inline] __mutex_lock+0xaad/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 css_killed_work_fn+0x93/0x5c0 kernel/cgroup/cgroup.c:4967 process_one_work+0xc47/0x1bb0 kernel/workqueue.c:2113 worker_thread+0x223/0x1990 kernel/workqueue.c:2247 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Showing all locks held in the system: 3 locks held by kworker/0:0/3: #0: ((wq_completion)"cgroup_destroy"){+.+.}, at: [<0000000078a17572>] work_static include/linux/workqueue.h:198 [inline] #0: ((wq_completion)"cgroup_destroy"){+.+.}, at: [<0000000078a17572>] set_work_data kernel/workqueue.c:619 [inline] #0: ((wq_completion)"cgroup_destroy"){+.+.}, at: [<0000000078a17572>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ((wq_completion)"cgroup_destroy"){+.+.}, at: [<0000000078a17572>] process_one_work+0xb12/0x1bb0 kernel/workqueue.c:2084 #1: ((work_completion)(&css->destroy_work)){+.+.}, at: [<00000000d632c961>] process_one_work+0xb89/0x1bb0 kernel/workqueue.c:2088 #2: (cgroup_mutex){+.+.}, at: [<00000000054481dc>] css_killed_work_fn+0x93/0x5c0 kernel/cgroup/cgroup.c:4967 3 locks held by kworker/1:1/24: #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<0000000078a17572>] work_static include/linux/workqueue.h:198 [inline] #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<0000000078a17572>] set_work_data kernel/workqueue.c:619 [inline] #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<0000000078a17572>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ((wq_completion)"events_power_efficient"){+.+.}, at: [<0000000078a17572>] process_one_work+0xb12/0x1bb0 kernel/workqueue.c:2084 #1: ((reg_check_chans).work){+.+.}, at: [<00000000d632c961>] process_one_work+0xb89/0x1bb0 kernel/workqueue.c:2088 #2: (rtnl_mutex){+.+.}, at: [<0000000062a8cae7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 2 locks held by khungtaskd/868: #0: (rcu_read_lock){....}, at: [<0000000067d4d2b8>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: (rcu_read_lock){....}, at: [<0000000067d4d2b8>] watchdog+0x1c5/0xd60 kernel/hung_task.c:249 #1: (tasklist_lock){.+.+}, at: [<0000000002e5b787>] debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470 2 locks held by rs:main Q:Reg/4290: #0: (&f->f_pos_lock){+.+.}, at: [<00000000a8cf40b4>] __fdget_pos+0x12b/0x190 fs/file.c:765 #1: (sb_writers#4){.+.+}, at: [<00000000c1df7261>] file_start_write include/linux/fs.h:2709 [inline] #1: (sb_writers#4){.+.+}, at: [<00000000c1df7261>] vfs_write+0x407/0x510 fs/read_write.c:543 2 locks held by getty/4382: #0: (&tty->ldisc_sem){++++}, at: [<00000000aa933352>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000f8e0c3a4>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4383: #0: (&tty->ldisc_sem){++++}, at: [<00000000aa933352>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000f8e0c3a4>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4384: #0: (&tty->ldisc_sem){++++}, at: [<00000000aa933352>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000f8e0c3a4>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4385: #0: (&tty->ldisc_sem){++++}, at: [<00000000aa933352>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000f8e0c3a4>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4386: #0: (&tty->ldisc_sem){++++}, at: [<00000000aa933352>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000f8e0c3a4>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4387: #0: (&tty->ldisc_sem){++++}, at: [<00000000aa933352>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000f8e0c3a4>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4388: #0: (&tty->ldisc_sem){++++}, at: [<00000000aa933352>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000f8e0c3a4>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by syz-executor4/4455: #0: (sb_writers#10){.+.+}, at: [<00000000d1f1505f>] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#10){.+.+}, at: [<00000000d1f1505f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<00000000557bab96>] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<00000000557bab96>] filename_create+0x192/0x520 fs/namei.c:3625 2 locks held by syz-executor6/4460: #0: (sb_writers#10){.+.+}, at: [<00000000d1f1505f>] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#10){.+.+}, at: [<00000000d1f1505f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<00000000557bab96>] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<00000000557bab96>] filename_create+0x192/0x520 fs/namei.c:3625 4 locks held by syz-executor2/4462: #0: (sb_writers#11){.+.+}, at: [<00000000d1f1505f>] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#11){.+.+}, at: [<00000000d1f1505f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&type->i_mutex_dir_key#4/1){+.+.}, at: [<00000000557bab96>] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key#4/1){+.+.}, at: [<00000000557bab96>] filename_create+0x192/0x520 fs/namei.c:3625 #2: (cgroup_mutex){+.+.}, at: [<000000006ce8eb5b>] cgroup_kn_lock_live+0x29e/0x580 kernel/cgroup/cgroup.c:1535 #3: (rtnl_mutex){+.+.}, at: [<0000000062a8cae7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 2 locks held by syz-executor3/4463: #0: (sb_writers#10){.+.+}, at: [<00000000d1f1505f>] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#10){.+.+}, at: [<00000000d1f1505f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<00000000557bab96>] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<00000000557bab96>] filename_create+0x192/0x520 fs/namei.c:3625 2 locks held by syz-executor7/4464: #0: (sb_writers#10){.+.+}, at: [<00000000d1f1505f>] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#10){.+.+}, at: [<00000000d1f1505f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<00000000557bab96>] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<00000000557bab96>] filename_create+0x192/0x520 fs/namei.c:3625 3 locks held by syz-executor0/4465: #0: (sb_writers#10){.+.+}, at: [<00000000d1f1505f>] sb_start_write include/linux/fs.h:1548 [inline] #0: (sb_writers#10){.+.+}, at: [<00000000d1f1505f>] mnt_want_write+0x3f/0xb0 fs/namespace.c:386 #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<00000000557bab96>] inode_lock_nested include/linux/fs.h:748 [inline] #1: (&type->i_mutex_dir_key#3/1){+.+.}, at: [<00000000557bab96>] filename_create+0x192/0x520 fs/namei.c:3625 #2: (cgroup_mutex){+.+.}, at: [<000000006ce8eb5b>] cgroup_kn_lock_live+0x29e/0x580 kernel/cgroup/cgroup.c:1535 3 locks held by kworker/1:2/4611: #0: ((wq_completion)"cgroup_destroy"){+.+.}, at: [<0000000078a17572>] work_static include/linux/workqueue.h:198 [inline] #0: ((wq_completion)"cgroup_destroy"){+.+.}, at: [<0000000078a17572>] set_work_data kernel/workqueue.c:619 [inline] #0: ((wq_completion)"cgroup_destroy"){+.+.}, at: [<0000000078a17572>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ((wq_completion)"cgroup_destroy"){+.+.}, at: [<0000000078a17572>] process_one_work+0xb12/0x1bb0 kernel/workqueue.c:2084 #1: ((work_completion)(&css->destroy_work)#2){+.+.}, at: [<00000000d632c961>] process_one_work+0xb89/0x1bb0 kernel/workqueue.c:2088 #2: (cgroup_mutex){+.+.}, at: [<00000000de52f78e>] css_release_work_fn+0xea/0x940 kernel/cgroup/cgroup.c:4592 3 locks held by kworker/0:6/6769: #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000078a17572>] work_static include/linux/workqueue.h:198 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000078a17572>] set_work_data kernel/workqueue.c:619 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000078a17572>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000078a17572>] process_one_work+0xb12/0x1bb0 kernel/workqueue.c:2084 #1: ((addr_chk_work).work){+.+.}, at: [<00000000d632c961>] process_one_work+0xb89/0x1bb0 kernel/workqueue.c:2088 #2: (rtnl_mutex){+.+.}, at: [<0000000062a8cae7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syz-executor1/8669: #0: (ipvs->sync_mutex){+.+.}, at: [<000000007fe02091>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 2 locks held by syz-executor1/8672: #0: (rtnl_mutex){+.+.}, at: [<0000000062a8cae7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (ipvs->sync_mutex){+.+.}, at: [<000000000aa74b6d>] do_ip_vs_set_ctl+0x10f8/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2388 1 lock held by syz-executor5/8670: #0: (&type->i_mutex_dir_key#3){++++}, at: [<0000000013ca6f2d>] inode_lock_shared include/linux/fs.h:723 [inline] #0: (&type->i_mutex_dir_key#3){++++}, at: [<0000000013ca6f2d>] lookup_slow+0x18e/0x4d0 fs/namei.c:1612 1 lock held by ipvs-b:2:0/8671: #0: (rtnl_mutex){+.+.}, at: [<0000000062a8cae7>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 868 Comm: khungtaskd Not tainted 4.16.0-rc7+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x24d lib/dump_stack.c:53 nmi_cpu_backtrace+0x1d2/0x210 lib/nmi_backtrace.c:103 nmi_trigger_cpumask_backtrace+0x123/0x180 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+0x90c/0xd60 kernel/hung_task.c:249 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 7315 Comm: kworker/1:7 Not tainted 4.16.0-rc7+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events rht_deferred_worker RIP: 0010:lock_release+0x51a/0xa40 kernel/locking/lockdep.c:3929 RSP: 0018:ffff8801af8cf428 EFLAGS: 00000282 RAX: dffffc0000000000 RBX: ffff88019e0f4300 RCX: 1ffff10033c1e96d RDX: 1ffffffff0f5957d RSI: 0000000000000002 RDI: 0000000000000282 RBP: ffff8801af8cf558 R08: 0000000000000000 R09: 1ffff10035f19e8e R10: 0000000000000000 R11: 0000000000000001 R12: fea9783511e7f0b1 R13: ffff88019e0f4300 R14: ffff8801af8cf470 R15: 1ffff10035f19e8a FS: 0000000000000000(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001bd3000 CR3: 0000000007a22003 CR4: 00000000001606e0 DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: process_one_work+0xca4/0x1bb0 kernel/workqueue.c:2119 worker_thread+0x223/0x1990 kernel/workqueue.c:2247 kthread+0x33c/0x400 kernel/kthread.c:238 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:406 Code: 74 d3 54 06 00 0f 84 0d 02 00 00 48 8b bd e0 fe ff ff 57 9d 0f 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 07 00 00 00 00 <4a> c7 44 38 08 00 00 00 00 4a c7 44 38 10 00 00 00 00 42 c7 44