INFO: task syzkaller815322:4406 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. syzkaller815322 D23592 4406 4403 0x00000000 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_timeout+0x1a3/0x230 kernel/time/timer.c:1777 do_wait_for_common kernel/sched/completion.c:86 [inline] __wait_for_common kernel/sched/completion.c:107 [inline] wait_for_common kernel/sched/completion.c:118 [inline] wait_for_completion+0x415/0x770 kernel/sched/completion.c:139 kthread_stop+0x14a/0x7a0 kernel/kthread.c:530 stop_sync_thread+0x3d9/0x740 net/netfilter/ipvs/ip_vs_sync.c:1996 do_ip_vs_set_ctl+0x2b1/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2394 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0x97/0xa0 net/ipv4/ip_sockglue.c:1261 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2406 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x445959 RSP: 002b:00007f5a37a49db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00000000006dac24 RCX: 0000000000445959 RDX: 000000000000048c RSI: 0000000000000000 RDI: 0000000000000004 RBP: 00000000006dac20 R08: 0000000000000018 R09: 0000000000000000 R10: 0000000020000080 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd1f9d778f R14: 00007f5a37a4a9c0 R15: 0000000000000001 Showing all locks held in the system: 3 locks held by kworker/1:1/23: #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000042bd9ebd>] work_static include/linux/workqueue.h:198 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000042bd9ebd>] set_work_data kernel/workqueue.c:619 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000042bd9ebd>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000042bd9ebd>] process_one_work+0xb12/0x1bb0 kernel/workqueue.c:2084 #1: ((addr_chk_work).work){+.+.}, at: [<0000000020db8b35>] process_one_work+0xb89/0x1bb0 kernel/workqueue.c:2088 #2: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 2 locks held by khungtaskd/869: #0: (rcu_read_lock){....}, at: [<0000000095930495>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: (rcu_read_lock){....}, at: [<0000000095930495>] watchdog+0x1c5/0xd60 kernel/hung_task.c:249 #1: (tasklist_lock){.+.+}, at: [<0000000045b9b1df>] debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470 2 locks held by getty/4374: #0: (&tty->ldisc_sem){++++}, at: [<000000002f19f4a7>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c3bc944d>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4375: #0: (&tty->ldisc_sem){++++}, at: [<000000002f19f4a7>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c3bc944d>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4376: #0: (&tty->ldisc_sem){++++}, at: [<000000002f19f4a7>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c3bc944d>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4377: #0: (&tty->ldisc_sem){++++}, at: [<000000002f19f4a7>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c3bc944d>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4378: #0: (&tty->ldisc_sem){++++}, at: [<000000002f19f4a7>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c3bc944d>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4379: #0: (&tty->ldisc_sem){++++}, at: [<000000002f19f4a7>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c3bc944d>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4380: #0: (&tty->ldisc_sem){++++}, at: [<000000002f19f4a7>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000c3bc944d>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 1 lock held by syzkaller815322/4406: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4423: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4431: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4439: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4447: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4455: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4463: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4471: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4479: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4487: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4495: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4503: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4511: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4519: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4527: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4535: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4420: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4425: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4433: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4441: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4449: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4457: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4465: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4473: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4481: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4489: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4497: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4505: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4513: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4521: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4529: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4537: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4418: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4429: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4438: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4445: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4454: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4461: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4470: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4477: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4486: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4493: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4502: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4509: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4518: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4525: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4534: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4541: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4419: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4427: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4435: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4443: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4451: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4459: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4467: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4475: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4483: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4491: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4499: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4507: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4515: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4523: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4531: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4539: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4416: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4424: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4432: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4440: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4448: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4456: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4464: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4472: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4480: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4488: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4496: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4504: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4512: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4520: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4528: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4536: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4417: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4426: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4434: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4442: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4450: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4458: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4466: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4474: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4482: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4490: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4498: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4506: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4514: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4522: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4530: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4538: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4415: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 2 locks held by syzkaller815322/4422: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (ipvs->sync_mutex){+.+.}, at: [<0000000003cd594b>] do_ip_vs_set_ctl+0x10f8/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2388 1 lock held by syzkaller815322/4430: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4437: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4446: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4453: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4462: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4469: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4478: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4485: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4494: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4501: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4510: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4517: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4526: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4533: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4414: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4428: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4436: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4444: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4452: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4460: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4468: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4476: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4484: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4492: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4500: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4508: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4516: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4524: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller815322/4532: #0: (ipvs->sync_mutex){+.+.}, at: [<0000000065cf3dfc>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller815322/4540: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by ipvs-b:0:0/4421: #0: (rtnl_mutex){+.+.}, at: [<0000000054bffde5>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 869 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: 4412 Comm: syzkaller815322 Not tainted 4.16.0-rc7+ #3 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_is_held+0x10c/0x140 kernel/locking/lockdep.c:3749 RSP: 0018:ffff8801b7a97900 EFLAGS: 00000082 RAX: 0000000000000000 RBX: 0000000000000282 RCX: ffffffff819ccbc8 RDX: dffffc0000000000 RSI: ffffffff87b448c0 RDI: ffff8801b4cf0ada RBP: ffff8801b7a97920 R08: 0000000000000000 R09: 1ffff10036f52f22 R10: ffff8801b7a978d8 R11: 0000000000000001 R12: ffff8801b4cf0240 R13: ffffed003699e156 R14: 0000000000000001 R15: ffff8801b4cf0ab8 FS: 0000000001c2a880(0000) GS:ffff8801db300000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000b7c000 CR3: 00000001b4d80002 CR4: 00000000001606e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_is_held_type+0x118/0x210 kernel/locking/lockdep.c:3958 lock_is_held include/linux/lockdep.h:344 [inline] rcu_preempt_sleep_check include/linux/rcupdate.h:301 [inline] ___might_sleep+0x35e/0x470 kernel/sched/core.c:6098 __might_sleep+0x95/0x190 kernel/sched/core.c:6086 kmap include/linux/highmem.h:59 [inline] copy_page_from_iter_iovec lib/iov_iter.c:288 [inline] copy_page_from_iter+0x31c/0x7c0 lib/iov_iter.c:731 pipe_write+0xa51/0xd60 fs/pipe.c:387 call_write_iter include/linux/fs.h:1782 [inline] new_sync_write fs/read_write.c:469 [inline] __vfs_write+0x684/0x970 fs/read_write.c:482 vfs_write+0x189/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x445959 RSP: 002b:00007ffd1f9d7808 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00000000006dada0 RCX: 0000000000445959 RDX: 0000000000000012 RSI: 00000000004ade66 RDI: 0000000000000001 RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dad8c R13: 00000000006dada0 R14: 0000000000000003 R15: 0000000000000001 Code: 04 3c 03 7e 3e 0f b6 43 22 83 e0 03 3b 45 c4 0f 94 c0 48 83 c4 18 5b 0f b6 c0 41 5c 41 5d 41 5e 41 5f 5d c3 31 c0 48 83 c4 18 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 48 8b 7d c8 e8 61 17 53 00 e9 2a