last executing test programs:

478.627736ms ago: executing program 0:
ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000))

457.870039ms ago: executing program 2:
socket$caif_stream(0x25, 0x1, 0x0)

326.61356ms ago: executing program 1:
sendmsg(0xffffffffffffffff, &(0x7f0000000000), 0x0)

65.14927ms ago: executing program 2:
getsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), &(0x7f0000000000))

55.038742ms ago: executing program 0:
unshare(0x0)

0s ago: executing program 1:
getpeername(0xffffffffffffffff, &(0x7f0000000000), &(0x7f0000000000))

kernel console output (not intermixed with test programs):

Warning: Permanently added '10.128.1.254' (ED25519) to the list of known hosts.
2024/06/16 13:14:24 fuzzer started
2024/06/16 13:14:25 dialing manager at 10.128.0.163:30035
[   57.867250][ T5090] cgroup: Unknown subsys name 'net'
[   58.120005][ T5090] cgroup: Unknown subsys name 'rlimit'
[   59.354092][ T5111] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
2024/06/16 13:14:31 starting 3 executor processes
[   65.026919][   T51] 
[   65.029478][   T51] =============================
[   65.034398][   T51] WARNING: suspicious RCU usage
[   65.039717][   T51] 6.10.0-rc3-syzkaller-00688-g934c29999b57 #0 Not tainted
[   65.046939][   T51] -----------------------------
[   65.051901][   T51] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage!
[   65.061804][   T51] 
[   65.061804][   T51] other info that might help us debug this:
[   65.061804][   T51] 
[   65.072483][   T51] 
[   65.072483][   T51] rcu_scheduler_active = 2, debug_locks = 1
[   65.080726][   T51] 3 locks held by kworker/u8:3/51:
[   65.085991][   T51]  #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[   65.097217][   T51]  #1: ffffc90000bb7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[   65.108160][   T51]  #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[   65.117921][   T51] 
[   65.117921][   T51] stack backtrace:
[   65.124027][   T51] CPU: 0 PID: 51 Comm: kworker/u8:3 Not tainted 6.10.0-rc3-syzkaller-00688-g934c29999b57 #0
[   65.134229][   T51] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
[   65.144375][   T51] Workqueue: netns cleanup_net
[   65.149158][   T51] Call Trace:
[   65.152446][   T51]  <TASK>
[   65.155366][   T51]  dump_stack_lvl+0x241/0x360
[   65.160045][   T51]  ? __pfx_dump_stack_lvl+0x10/0x10
[   65.165243][   T51]  ? __pfx__printk+0x10/0x10
[   65.170004][   T51]  lockdep_rcu_suspicious+0x221/0x340
[   65.175461][   T51]  _destroy_all_sets+0x232/0x5f0
[   65.180509][   T51]  ip_set_net_exit+0x20/0x50
[   65.185099][   T51]  cleanup_net+0x802/0xcc0
[   65.189521][   T51]  ? __pfx_cleanup_net+0x10/0x10
[   65.194838][   T51]  ? process_scheduled_works+0x945/0x1830
[   65.200570][   T51]  process_scheduled_works+0xa2c/0x1830
[   65.206280][   T51]  ? __pfx_process_scheduled_works+0x10/0x10
[   65.212421][   T51]  ? assign_work+0x364/0x3d0
[   65.217119][   T51]  worker_thread+0x86d/0xd70
[   65.221836][   T51]  ? __kthread_parkme+0x169/0x1d0
2024/06/16 13:14:32 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF
[   65.226978][   T51]  ? __pfx_worker_thread+0x10/0x10
[   65.232438][   T51]  kthread+0x2f0/0x390
[   65.236503][   T51]  ? __pfx_worker_thread+0x10/0x10
[   65.241697][   T51]  ? __pfx_kthread+0x10/0x10
[   65.246363][   T51]  ret_from_fork+0x4b/0x80
[   65.250774][   T51]  ? __pfx_kthread+0x10/0x10
[   65.255351][   T51]  ret_from_fork_asm+0x1a/0x30
[   65.260211][   T51]  </TASK>
[   65.306954][   T51] 
[   65.309432][   T51] =============================
[   65.314296][   T51] WARNING: suspicious RCU usage
[   65.319685][   T51] 6.10.0-rc3-syzkaller-00688-g934c29999b57 #0 Not tainted
[   65.327226][   T51] -----------------------------
[   65.332100][   T51] net/netfilter/ipset/ip_set_core.c:1211 suspicious rcu_dereference_protected() usage!
[   65.342328][   T51] 
[   65.342328][   T51] other info that might help us debug this:
[   65.342328][   T51] 
[   65.353049][   T51] 
[   65.353049][   T51] rcu_scheduler_active = 2, debug_locks = 1
[   65.361285][   T51] 3 locks held by kworker/u8:3/51:
[   65.366547][   T51]  #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[   65.377817][   T51]  #1: ffffc90000bb7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[   65.388633][   T51]  #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[   65.398258][   T51] 
[   65.398258][   T51] stack backtrace:
[   65.404166][   T51] CPU: 0 PID: 51