INFO: task syz-executor.1:20005 can't die for more than 143 seconds.
task:syz-executor.1  state:R  running task     stack:25072 pid:20005 ppid:  8789 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4373 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5124
 schedule+0xcf/0x270 kernel/sched/core.c:5203
 synchronize_rcu_expedited+0x44e/0x610 kernel/rcu/tree_exp.h:852
 synchronize_net+0x37/0x50 net/core/dev.c:10670
 nf_conntrack_cleanup_net_list+0x32/0x250 net/netfilter/nf_conntrack_core.c:2427
 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+0x2ab5/0x6fd0 kernel/fork.c:2100
 kernel_clone+0xe7/0xab0 kernel/fork.c:2462
 __do_sys_clone+0xc8/0x110 kernel/fork.c:2579
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45e219
RSP: 002b:00007f7447ee7c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000ec02a100
RBP: 000000000119bfd0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c
R13: 00007ffcfe5925df R14: 00007f7447ee89c0 R15: 000000000119bf8c
INFO: task syz-executor.0:20010 can't die for more than 148 seconds.
task:syz-executor.0  state:R  running task     stack:25208 pid:20010 ppid:  8787 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4373 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5124
INFO: task syz-executor.3:20021 can't die for more than 151 seconds.
task:syz-executor.3  state:D stack:25008 pid:20021 ppid:  8793 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4373 [inline]
 __schedule+0x90c/0x21a0 kernel/sched/core.c:5124
 schedule+0xcf/0x270 kernel/sched/core.c:5203
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:5262

Showing all locks held in the system:
4 locks held by kworker/u4:4/182:
1 lock held by khungtaskd/1645:
 #0: ffffffff8b370da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6326
1 lock held by in:imklog/8139:
 #0: ffff888017a6d270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947