INFO: task syzkaller680329:4137 blocked for more than 120 seconds. Not tainted 4.16.0-rc6+ #282 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syzkaller680329 D22824 4137 4133 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_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 do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 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:1253 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2400 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:3039 SYSC_setsockopt net/socket.c:1850 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1829 do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x445959 RSP: 002b:00007ff1b468ddb8 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: 00007ffd079e3f8f R14: 00007ff1b468e9c0 R15: 0000000000000001 Showing all locks held in the system: 3 locks held by kworker/0:1/24: #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000012888e70>] work_static include/linux/workqueue.h:198 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000012888e70>] set_work_data kernel/workqueue.c:619 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000012888e70>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline] #0: ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: [<0000000012888e70>] process_one_work+0xb12/0x1bb0 kernel/workqueue.c:2084 #1: ((addr_chk_work).work){+.+.}, at: [<00000000feec656f>] process_one_work+0xb89/0x1bb0 kernel/workqueue.c:2088 #2: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 2 locks held by khungtaskd/800: #0: (rcu_read_lock){....}, at: [<00000000fd9fd4ce>] check_hung_uninterruptible_tasks kernel/hung_task.c:175 [inline] #0: (rcu_read_lock){....}, at: [<00000000fd9fd4ce>] watchdog+0x1c5/0xd60 kernel/hung_task.c:249 #1: (tasklist_lock){.+.+}, at: [<000000007063bf71>] debug_show_all_locks+0xd3/0x3d0 kernel/locking/lockdep.c:4470 2 locks held by getty/4105: #0: (&tty->ldisc_sem){++++}, at: [<00000000fdf4ab7f>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000bc7968a6>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4106: #0: (&tty->ldisc_sem){++++}, at: [<00000000fdf4ab7f>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000bc7968a6>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4107: #0: (&tty->ldisc_sem){++++}, at: [<00000000fdf4ab7f>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000bc7968a6>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4108: #0: (&tty->ldisc_sem){++++}, at: [<00000000fdf4ab7f>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000bc7968a6>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4109: #0: (&tty->ldisc_sem){++++}, at: [<00000000fdf4ab7f>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000bc7968a6>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4110: #0: (&tty->ldisc_sem){++++}, at: [<00000000fdf4ab7f>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000bc7968a6>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 2 locks held by getty/4111: #0: (&tty->ldisc_sem){++++}, at: [<00000000fdf4ab7f>] ldsem_down_read+0x37/0x40 drivers/tty/tty_ldsem.c:365 #1: (&ldata->atomic_read_lock){+.+.}, at: [<00000000bc7968a6>] n_tty_read+0x2ef/0x1a40 drivers/tty/n_tty.c:2131 1 lock held by syzkaller680329/4137: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4154: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4165: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4170: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4181: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4186: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4197: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4202: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4213: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4218: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4229: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4234: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4245: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4250: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4261: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4266: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4148: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4158: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4163: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4173: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4180: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4189: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4195: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4205: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4211: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4221: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4227: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4237: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4242: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4252: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4260: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4269: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4139: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4160: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4168: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4176: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4184: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4192: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4200: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4208: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4216: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4224: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4232: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4240: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4248: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4256: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4264: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4272: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4142: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4161: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4169: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4177: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4185: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4193: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4201: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4209: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4217: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4225: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4233: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4241: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4249: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4257: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4265: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4273: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4149: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4159: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4166: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4175: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4182: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4191: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4198: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4207: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4214: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4223: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4230: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4239: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4246: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4255: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4262: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4271: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 2 locks held by syzkaller680329/4146: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 #1: (ipvs->sync_mutex){+.+.}, at: [<0000000049d4dad8>] do_ip_vs_set_ctl+0x10f8/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2388 1 lock held by syzkaller680329/4157: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4162: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4172: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4178: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4188: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4194: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4204: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4210: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4220: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4226: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4236: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4243: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4253: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4259: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4270: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4150: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4155: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4167: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4171: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4183: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4187: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4199: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4203: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4215: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4219: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4231: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4235: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4247: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4251: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4263: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4267: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4145: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4156: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4164: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4174: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4179: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4190: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4196: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4206: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4212: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4222: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4228: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4238: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4244: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4254: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by syzkaller680329/4258: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 1 lock held by syzkaller680329/4268: #0: (ipvs->sync_mutex){+.+.}, at: [<00000000e0ba2a30>] do_ip_vs_set_ctl+0x277/0x1cc0 net/netfilter/ipvs/ip_vs_ctl.c:2393 1 lock held by ipvs-b:0:0/4153: #0: (rtnl_mutex){+.+.}, at: [<00000000cc0b82fa>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 800 Comm: khungtaskd Not tainted 4.16.0-rc6+ #282 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4135 Comm: syzkaller680329 Not tainted 4.16.0-rc6+ #282 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hlock_class kernel/locking/lockdep.c:152 [inline] RIP: 0010:mark_lock+0x194/0x1430 kernel/locking/lockdep.c:3121 RSP: 0018:ffff8801c846efb8 EFLAGS: 00000002 RAX: 0000000000000085 RBX: 0000000000000008 RCX: 0000000000000299 RDX: ffff8801c9184c80 RSI: 1ffff10039230990 RDI: ffff8801c91843c0 RBP: ffff8801c846f0e0 R08: 1ffff1003908ddfb R09: 000000000000000c R10: 0000000000000000 R11: 0000000000000000 R12: ffff8801c9184c60 R13: 0000000000000100 R14: 000000000000ad40 R15: 1ffff1003908ddfb FS: 0000000001d88880(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001c91c1005 CR4: 00000000001606f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __lock_acquire+0x664/0x3e00 kernel/locking/lockdep.c:3392 lock_acquire+0x1d5/0x580 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 try_to_wake_up+0xbc/0x15f0 kernel/sched/core.c:1989 default_wake_function+0x30/0x50 kernel/sched/core.c:3693 __pollwake fs/select.c:207 [inline] pollwake+0x20f/0x2d0 fs/select.c:217 __wake_up_common+0x18e/0x780 kernel/sched/wait.c:97 __wake_up_common_lock+0x1b4/0x310 kernel/sched/wait.c:125 __wake_up_sync_key+0x19/0x20 kernel/sched/wait.c:203 pipe_write+0x63b/0xd60 fs/pipe.c:477 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:00007ffd079e4008 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: ee 03 0f b6 0c 0e 84 c9 74 09 80 f9 03 0f 8e 1a 01 00 00 25 ff 1f 00 00 48 8d 0c 80 4c 8d 34 88 49 c1 e6 04 49 81 ee 50 01 00 00 <49> 81 c6 40 21 0f 88 49 8d 7e 30 48 b8 00 00 00 00 00 fc ff df