INFO: task syz-executor.4:22013 can't die for more than 143 seconds.
syz-executor.4  R  running task    25440 22013   7265 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3669 [inline]
 __schedule+0x8e5/0x21e0 kernel/sched/core.c:4418
 preempt_schedule_irq+0xb0/0x150 kernel/sched/core.c:4676
 irqentry_exit_cond_resched kernel/entry/common.c:332 [inline]
 irqentry_exit_cond_resched kernel/entry/common.c:324 [inline]
 irqentry_exit+0x65/0x90 kernel/entry/common.c:362
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:581
RIP: 0010:rcu_is_watching+0x80/0xb0 kernel/rcu/tree.c:1094
Code: c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 25 8b 83 e0 00 00 00 d1 e8 83 e0 01 65 ff 0d f0 e6 a0 7e <74> 06 48 83 c4 08 5b c3 e8 e2 5f 9f ff 48 83 c4 08 5b c3 e8 f8 49
RSP: 0018:ffffc900056f78b0 EFLAGS: 00000286
RAX: 0000000000000001 RBX: ffff8880ae636bc0 RCX: 1ffffffff1307d20
RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8880ae636ca0
RBP: 000000000002196f R08: 0000000000000000 R09: ffffffff8c66d9e7
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000002
R13: ffffc900056f7a30 R14: 000000000000000a R15: dffffc0000000000
 rcu_read_unlock include/linux/rcupdate.h:684 [inline]
 inet_twsk_purge+0x6dd/0x7b0 net/ipv4/inet_timewait_sock.c:299
 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:189
 setup_net+0x502/0x850 net/core/net_namespace.c:364
 copy_net_ns+0x2cf/0x5e0 net/core/net_namespace.c:482
 create_new_namespaces+0x3f6/0xb10 kernel/nsproxy.c:110
 copy_namespaces+0x385/0x470 kernel/nsproxy.c:179
 copy_process+0x2a78/0x6a80 kernel/fork.c:2076
 _do_fork+0xe8/0xb10 kernel/fork.c:2431
 __do_sys_clone+0xc8/0x110 kernel/fork.c:2548
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45cce9
Code: Bad RIP value.
RSP: 002b:00007f002265fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000001f00 RCX: 000000000045cce9
RDX: 9999999999999999 RSI: 0000000000000000 RDI: 00000000e1004d7c
RBP: 000000000078bf50 R08: ffffffffffffffff R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000078bf0c
R13: 00007ffda5a2bc2f R14: 00007f00226609c0 R15: 000000000078bf0c

Showing all locks held in the system:
1 lock held by khungtaskd/1169:
 #0: ffffffff89c52a80 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5823
1 lock held by in:imklog/6535:
 #0: ffff888097e4c5f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930
1 lock held by syz-executor.4/22013:
4 locks held by kworker/u4:10/22285:
1 lock held by syz-executor.3/24491:
 #0: ffffffff8a8530b0 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1814
1 lock held by syz-executor.3/24501:
 #0: ffffffff8a8530b0 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1814

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