INFO: task syz-executor.2:18171 can't die for more than 143 seconds. task:syz-executor.2 state:R running task stack:27448 pid:18171 ppid: 16825 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4312 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5063 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:5325 irqentry_exit_cond_resched kernel/entry/common.c:393 [inline] irqentry_exit_cond_resched kernel/entry/common.c:385 [inline] irqentry_exit+0x7a/0xa0 kernel/entry/common.c:423 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628 RIP: 0010:lock_is_held_type+0xc2/0x100 kernel/locking/lockdep.c:5481 Code: 03 44 39 f0 41 0f 94 c4 48 c7 c7 e0 a2 4b 89 e8 44 0b 00 00 b8 ff ff ff ff 65 0f c1 05 07 d0 14 77 83 f8 01 75 23 ff 34 24 9d <48> 83 c4 08 44 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 45 31 e4 eb RSP: 0018:ffffc9001029f848 EFLAGS: 00000202 RAX: 0000000000000001 RBX: 0000000000000001 RCX: 1ffffffff19dfe03 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffff8b363de0 R08: 000000000007ffff R09: 0000000000000000 R10: ffffffff876f977d R11: 0000000000000000 R12: 0000000000000000 R13: ffff88806bb48990 R14: 00000000ffffffff R15: ffff88806bb48990 lock_is_held include/linux/lockdep.h:271 [inline] ___might_sleep+0x23f/0x2c0 kernel/sched/core.c:7866 inet_twsk_purge+0xe8/0x7c0 net/ipv4/inet_timewait_sock.c:267 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:190 setup_net+0x508/0x850 net/core/net_namespace.c:365 copy_net_ns+0x31e/0x760 net/core/net_namespace.c:483 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110 copy_namespaces+0x385/0x440 kernel/nsproxy.c:178 copy_process+0x2aaf/0x6fd0 kernel/fork.c:2102 kernel_clone+0xe7/0xab0 kernel/fork.c:2464 __do_sys_clone+0xc8/0x110 kernel/fork.c:2581 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007fb23b59fc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 9999999999999999 RSI: 0000000000000000 RDI: 00000000e1004d7c RBP: 000000000119c078 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034 R13: 00007ffe8313fbef R14: 00007fb23b5a09c0 R15: 000000000119c034 Showing all locks held in the system: 3 locks held by kworker/0:2/8: #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff888010062d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 kernel/workqueue.c:2246 #1: ffffc90000cd7da8 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 kernel/workqueue.c:2250 #2: ffffffff8c94cae8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xb/0x60 net/core/link_watch.c:250 2 locks held by kworker/u4:1/25: 1 lock held by khungtaskd/1653: #0: ffffffff8b363ea0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254 1 lock held by in:imklog/8183: #0: ffff8880138b3270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 2 locks held by kworker/0:1/18091: #0: ffff8880b9e34fd8 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1319 [inline] #0: ffff8880b9e34fd8 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x21a0 kernel/sched/core.c:4980 #1: ffff8880b9e20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 2 locks held by kworker/1:0/18106: #0: ffff88801007c538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88801007c538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88801007c538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88801007c538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:616 [inline] #0: ffff88801007c538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:643 [inline] #0: ffff88801007c538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x871/0x15f0 kernel/workqueue.c:2246 #1: ffffc9001009fda8 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a5/0x15f0 kernel/workqueue.c:2250 2 locks held by syz-executor.2/18171: 2 locks held by syz-executor.4/18174: #0: ffffffff8c94cae8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:676 [inline] #0: ffffffff8c94cae8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3a/0x180 drivers/net/tun.c:3354 #1: ffffffff8b36c8a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #1: ffffffff8b36c8a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x4f2/0x610 kernel/rcu/tree_exp.h:836 1 lock held by syz-executor.1/18181: #0: ffffffff8c94cae8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:676 [inline] #0: ffffffff8c94cae8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3a/0x180 drivers/net/tun.c:3354 2 locks held by syz-executor.3/18224: #0: ffffffff8c93a850 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x2fa/0x760 net/core/net_namespace.c:479 #1: ffffffff8c94cae8 (rtnl_mutex){+.+.}-{3:3}, at: ip_fib_net_exit+0x1b/0x2b0 net/ipv4/fib_frontend.c:1544 1 lock held by syz-executor.0/18225: #0: ffffffff8c94cae8 (rtnl_mutex){+.+.}-{3:3}, at: tun_detach drivers/net/tun.c:676 [inline] #0: ffffffff8c94cae8 (rtnl_mutex){+.+.}-{3:3}, at: tun_chr_close+0x3a/0x180 drivers/net/tun.c:3354 2 locks held by syz-executor.5/18258: =============================================