last executing test programs:

435.366461ms ago: executing program 1:
connect(0xffffffffffffffff, &(0x7f0000000000), 0x0)

418.477684ms ago: executing program 2:
recvfrom(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0, 0x0, 0x0)

409.155665ms ago: executing program 0:
ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000))

91.210085ms ago: executing program 0:
accept4(0xffffffffffffffff, 0x0, &(0x7f0000000000), 0x0)

9.899158ms ago: executing program 1:
sendmsg(0xffffffffffffffff, &(0x7f0000000000), 0x0)

0s ago: executing program 2:
write(0xffffffffffffffff, &(0x7f0000000000), 0x0)

kernel console output (not intermixed with test programs):

Warning: Permanently added '10.128.0.63' (ED25519) to the list of known hosts.
2024/06/17 15:52:38 fuzzer started
2024/06/17 15:52:38 dialing manager at 10.128.0.163:30035
[   58.191471][ T5088] cgroup: Unknown subsys name 'net'
[   58.442880][ T5088] cgroup: Unknown subsys name 'rlimit'
[   59.608142][ T5111] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
2024/06/17 15:52:46 starting 3 executor processes
[   66.458511][ T1283] 
[   66.461048][ T1283] =============================
[   66.466222][ T1283] WARNING: suspicious RCU usage
[   66.471103][ T1283] 6.10.0-rc3-syzkaller-00696-g4314175af496 #0 Not tainted
[   66.478505][ T1283] -----------------------------
[   66.483391][ T1283] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage!
[   66.493099][ T1283] 
[   66.493099][ T1283] other info that might help us debug this:
[   66.493099][ T1283] 
[   66.503393][ T1283] 
2024/06/17 15:52:47 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF
[   66.503393][ T1283] rcu_scheduler_active = 2, debug_locks = 1
[   66.511623][ T1283] 3 locks held by kworker/u8:6/1283:
[   66.517053][ T1283]  #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[   66.528582][ T1283]  #1: ffffc90004fdfd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[   66.539239][ T1283]  #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[   66.548864][ T1283] 
[   66.548864][ T1283] stack backtrace:
[   66.555090][ T1283] CPU: 0 PID: 1283 Comm: kworker/u8:6 Not tainted 6.10.0-rc3-syzkaller-00696-g4314175af496 #0
[   66.565442][ T1283] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
[   66.575528][ T1283] Workqueue: netns cleanup_net
[   66.580340][ T1283] Call Trace:
[   66.583632][ T1283]  <TASK>
[   66.586582][ T1283]  dump_stack_lvl+0x241/0x360
[   66.591290][ T1283]  ? __pfx_dump_stack_lvl+0x10/0x10
[   66.596536][ T1283]  ? __pfx__printk+0x10/0x10
[   66.601135][ T1283]  lockdep_rcu_suspicious+0x221/0x340
[   66.606506][ T1283]  _destroy_all_sets+0x232/0x5f0
[   66.611577][ T1283]  ip_set_net_exit+0x20/0x50
[   66.616199][ T1283]  cleanup_net+0x802/0xcc0
[   66.620631][ T1283]  ? __pfx_cleanup_net+0x10/0x10
[   66.625605][ T1283]  ? process_scheduled_works+0x945/0x1830
[   66.631344][ T1283]  process_scheduled_works+0xa2c/0x1830
[   66.636914][ T1283]  ? __pfx_process_scheduled_works+0x10/0x10
[   66.642900][ T1283]  ? assign_work+0x364/0x3d0
[   66.647491][ T1283]  worker_thread+0x86d/0xd70
[   66.652086][ T1283]  ? _raw_spin_unlock_irqrestore+0xdd/0x140
[   66.657985][ T1283]  ? __kthread_parkme+0x169/0x1d0
[   66.663008][ T1283]  ? __pfx_worker_thread+0x10/0x10
[   66.668119][ T1283]  kthread+0x2f0/0x390
[   66.672188][ T1283]  ? __pfx_worker_thread+0x10/0x10
[   66.677300][ T1283]  ? __pfx_kthread+0x10/0x10
[   66.681912][ T1283]  ret_from_fork+0x4b/0x80
[   66.686330][ T1283]  ? __pfx_kthread+0x10/0x10
[   66.690922][ T1283]  ret_from_fork_asm+0x1a/0x30
[   66.695701][ T1283]  </TASK>
[   66.716601][ T1283] 
[   66.718981][ T1283] =============================
[   66.724197][ T1283] WARNING: suspicious RCU usage
[   66.729068][ T1283] 6.10.0-rc3-syzkaller-00696-g4314175af496 #0 Not tainted
[   66.736529][ T1283] -----------------------------
[   66.741479][ T1283] net/netfilter/ipset/ip_set_core.c:1211 suspicious rcu_dereference_protected() usage!
[   66.751490][ T1283] 
[   66.751490][ T1283] other info that might help us debug this:
[   66.751490][ T1283] 
[   66.762053][ T1283] 
[   66.762053][ T1283] rcu_scheduler_active = 2, debug_locks = 1
[   66.770558][ T1283] 3 locks held by kworker/u8:6/1283:
[   66.776164][ T1283]  #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[   66.787594][ T1283]  #1: ffffc90004fdfd00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[   66.798490][ T1283]  #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[   66.808267][ T1283] 
[   66.808267][ T1283] stack backtrace:
[   66.814585][ T1283] CPU: 1