INFO: task syz-executor.0:30475 can't die for more than 143 seconds.
task:syz-executor.0  state:R  running task     stack:27168 pid:30475 ppid: 17757 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4955 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6236
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6408
 __cond_resched+0x13/0x20 kernel/sched/core.c:8121
INFO: task syz-executor.1:30472 can't die for more than 146 seconds.
task:syz-executor.1  state:R  running task     stack:27032 pid:30472 ppid: 17411 flags:0x00004006
Call Trace:
INFO: task syz-executor.5:30474 can't die for more than 150 seconds.
task:syz-executor.5  state:R  running task     stack:26952 pid:30474 ppid: 17409 flags:0x00004006
Call Trace:
 context_switch kernel/sched/core.c:4955 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6236
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:6408
 __cond_resched+0x13/0x20 kernel/sched/core.c:8121
 _cond_resched include/linux/sched.h:2033 [inline]
 get_next_corpse net/netfilter/nf_conntrack_core.c:2253 [inline]
 nf_ct_iterate_cleanup+0x172/0x450 net/netfilter/nf_conntrack_core.c:2275
 nf_conntrack_cleanup_net_list+0x14c/0x4f0 net/netfilter/nf_conntrack_core.c:2469
 ops_exit_list+0x10d/0x160 net/core/net_namespace.c:171
 setup_net+0x639/0xa30 net/core/net_namespace.c:349
 copy_net_ns+0x319/0x760 net/core/net_namespace.c:470
 create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0xc1/0x1f0 kernel/nsproxy.c:226
 ksys_unshare+0x445/0x920 kernel/fork.c:3128
 __do_sys_unshare kernel/fork.c:3199 [inline]
 __se_sys_unshare kernel/fork.c:3197 [inline]
 __x64_sys_unshare+0x2d/0x40 kernel/fork.c:3197
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f529b452739
RSP: 002b:00007f52989c9188 EFLAGS: 00000246 ORIG_RAX: 0000000000000110
RAX: ffffffffffffffda RBX: 00007f529b556f80 RCX: 00007f529b452739
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000040000000
RBP: 00007f529b4accc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f529b556f80
R13: 00007ffdab514a5f R14: 00007f52989c9300 R15: 0000000000022000