last executing test programs:

397.221859ms ago: executing program 1:
accept4(0xffffffffffffffff, 0x0, &(0x7f0000000000), 0x0)

301.980944ms ago: executing program 2:
sendmsg(0xffffffffffffffff, &(0x7f0000000000), 0x0)

151.632237ms ago: executing program 0:
ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000))

42.983174ms ago: executing program 1:
recvfrom(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0, 0x0, 0x0)

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

kernel console output (not intermixed with test programs):

Warning: Permanently added '10.128.1.120' (ED25519) to the list of known hosts.
2024/06/20 02:08:30 fuzzer started
2024/06/20 02:08:30 dialing manager at 10.128.0.163:30035
syzkaller login: [   55.004681][ T5090] cgroup: Unknown subsys name 'net'
[   55.292432][ T5090] cgroup: Unknown subsys name 'rlimit'
[   56.391207][ T5092] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
2024/06/20 02:08:36 starting 3 executor processes
[   61.886878][   T12] 
[   61.889466][   T12] =============================
[   61.894339][   T12] WARNING: suspicious RCU usage
[   61.899380][   T12] 6.10.0-rc3-syzkaller-00750-g7e8fcb815432 #0 Not tainted
[   61.906501][   T12] -----------------------------
[   61.911427][   T12] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage!
[   61.921131][   T12] 
[   61.921131][   T12] other info that might help us debug this:
[   61.921131][   T12] 
[   61.931441][   T12] 
[   61.931441][   T12] rcu_scheduler_active = 2, debug_locks = 1
[   61.939841][   T12] 3 locks held by kworker/u8:1/12:
[   61.944996][   T12]  #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[   61.956018][   T12]  #1: ffffc90000117d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[   61.966739][   T12]  #2: ffffffff8f5da110 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[   61.976291][   T12] 
[   61.976291][   T12] stack backtrace:
2024/06/20 02:08:37 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF
[   61.982362][   T12] CPU: 1 PID: 12 Comm: kworker/u8:1 Not tainted 6.10.0-rc3-syzkaller-00750-g7e8fcb815432 #0
[   61.992452][   T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
[   62.002627][   T12] Workqueue: netns cleanup_net
[   62.007447][   T12] Call Trace:
[   62.010747][   T12]  <TASK>
[   62.013694][   T12]  dump_stack_lvl+0x241/0x360
[   62.018399][   T12]  ? __pfx_dump_stack_lvl+0x10/0x10
[   62.023625][   T12]  ? __pfx__printk+0x10/0x10
[   62.028261][   T12]  lockdep_rcu_suspicious+0x221/0x340
[   62.033678][   T12]  _destroy_all_sets+0x232/0x5f0
[   62.038665][   T12]  ip_set_net_exit+0x20/0x50
[   62.043298][   T12]  cleanup_net+0x802/0xcc0
[   62.047739][   T12]  ? __pfx_cleanup_net+0x10/0x10
[   62.052706][   T12]  ? process_scheduled_works+0x945/0x1830
[   62.058442][   T12]  process_scheduled_works+0xa2c/0x1830
[   62.064126][   T12]  ? __pfx_process_scheduled_works+0x10/0x10
[   62.070223][   T12]  ? assign_work+0x364/0x3d0
[   62.074831][   T12]  worker_thread+0x86d/0xd70
[   62.079548][   T12]  ? __kthread_parkme+0x169/0x1d0
[   62.084589][   T12]  ? __pfx_worker_thread+0x10/0x10
[   62.089722][   T12]  kthread+0x2f0/0x390
[   62.093823][   T12]  ? __pfx_worker_thread+0x10/0x10
[   62.098936][   T12]  ? __pfx_kthread+0x10/0x10
[   62.103675][   T12]  ret_from_fork+0x4b/0x80
[   62.108104][   T12]  ? __pfx_kthread+0x10/0x10
[   62.112705][   T12]  ret_from_fork_asm+0x1a/0x30
[   62.117498][   T12]  </TASK>
[   62.127707][   T12] 
[   62.130128][   T12] =============================
[   62.134979][   T12] WARNING: susp