last executing test programs:

278.596836ms ago: executing program 2:
setsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), 0x0)

83.020017ms ago: executing program 1:
getsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), &(0x7f0000000000))

51.471512ms ago: executing program 2:
write(0xffffffffffffffff, &(0x7f0000000000), 0x0)

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

kernel console output (not intermixed with test programs):

Warning: Permanently added '10.128.0.141' (ED25519) to the list of known hosts.
2024/06/17 20:30:21 fuzzer started
2024/06/17 20:30:21 dialing manager at 10.128.0.163:30035
syzkaller login: [   58.521323][ T5094] cgroup: Unknown subsys name 'net'
[   58.872925][ T5094] cgroup: Unknown subsys name 'rlimit'
[   59.952986][ T5105] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
2024/06/17 20:30:29 starting 3 executor processes
[   66.437794][   T11] 
[   66.440349][   T11] =============================
[   66.445227][   T11] WARNING: suspicious RCU usage
[   66.450169][   T11] 6.10.0-rc3-syzkaller-00696-g4314175af496 #0 Not tainted
[   66.457293][   T11] -----------------------------
[   66.462219][   T11] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage!
[   66.472111][   T11] 
[   66.472111][   T11] other info that might help us debug this:
[   66.472111][   T11] 
[   66.482547][   T11] 
[   66.482547][   T11] rcu_scheduler_active = 2, debug_locks = 1
[   66.490851][   T11] 3 locks held by kworker/u8:0/11:
[   66.495983][   T11]  #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[   66.507418][   T11]  #1: ffffc90000107d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[   66.518313][   T11]  #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[   66.528157][   T11] 
[   66.528157][   T11] stack backtrace:
[   66.534090][   T11] CPU: 1 PID: 11 Comm: kworker/u8:0 Not tainted 6.10.0-rc3-syzkaller-00696-g4314175af496 #0
[   66.544265][   T11] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
[   66.554435][   T11] Workqueue: netns cleanup_net
[   66.559253][   T11] Call Trace:
[   66.562550][   T11]  <TASK>
[   66.565484][   T11]  dump_stack_lvl+0x241/0x360
[   66.570276][   T11]  ? __pfx_dump_stack_lvl+0x10/0x10
[   66.575591][   T11]  ? __pfx__printk+0x10/0x10
[   66.580226][   T11]  lockdep_rcu_suspicious+0x221/0x340
[   66.585642][   T11]  _destroy_all_sets+0x232/0x5f0
[   66.590636][   T11]  ip_set_net_exit+0x20/0x50
[   66.595271][   T11]  cleanup_net+0x802/0xcc0
[   66.599731][   T11]  ? __pfx_cleanup_net+0x10/0x10
[   66.604718][   T11]  ? process_scheduled_works+0x945/0x1830
[   66.610466][   T11]  process_scheduled_works+0xa2c/0x1830
[   66.616087][   T11]  ? __pfx_process_scheduled_works+0x10/0x10
[   66.622109][   T11]  ? assign_work+0x364/0x3d0
[   66.626738][   T11]  worker_thread+0x86d/0xd70
[   66.631366][   T11]  ? __kthread_parkme+0x169/0x1d0
2024/06/17 20:30:29 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF
[   66.636393][   T11]  ? __pfx_worker_thread+0x10/0x10
[   66.641616][   T11]  kthread+0x2f0/0x390
[   66.645691][   T11]  ? __pfx_worker_thread+0x10/0x10
[   66.650826][   T11]  ? __pfx_kthread+0x10/0x10
[   66.655438][   T11]  ret_from_fork+0x4b/0x80
[   66.659946][   T11]  ? __pfx_kthread+0x10/0x10
[   66.664529][   T11]  ret_from_fork_asm+0x1a/0x30
[   66.669298][   T11]  </TASK>
[   66.689787][   T11] 
[   66.692161][   T11] =============================
[   66.697014][   T11] WARNING: suspicious RCU usage
[   66.702412][   T11] 6.10.0-rc3-syzkaller-00696-g4314175af496 #0 Not tainted
[   66.709778][   T11] -----------------------------
[   66.714646][   T11] net/netfilter/ipset/ip_set_core.c:1211 suspicious rcu_dereference_protected() usage!
[   66.724348][   T11] 
[   66.724348][   T11] other info that might help us debug this:
[   66.724348][   T11] 
[   66.734644][   T11] 
[   66.734644][   T11] rcu_scheduler_active = 2, debug_locks = 1
[   66.742780][   T11] 3 locks held by kworker/u8:0/11:
[   66.747908][   T11]  #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[   66.758935][   T11]  #1: ffffc90000107d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[   66.769590][   T11]  #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[   66.779098][   T11] 
[   66.779098][   T11] stack backtrace:
[   66.784995][   T11] CPU: 0 PID: 11 Comm: kworker/u8:0 Not t