last executing test programs:

472.272097ms ago: executing program 1:
getsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), &(0x7f0000000000))

448.30881ms ago: executing program 2:
ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000))

391.293969ms ago: executing program 0:
socket$nl_netfilter(0x10, 0x3, 0xc)

85.433797ms ago: executing program 1:
accept4(0xffffffffffffffff, 0x0, &(0x7f0000000000), 0x0)

201.67µs ago: executing program 0:
bind(0xffffffffffffffff, &(0x7f0000000000), 0x0)

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

kernel console output (not intermixed with test programs):

Warning: Permanently added '10.128.0.44' (ED25519) to the list of known hosts.
2024/06/15 13:12:18 fuzzer started
2024/06/15 13:12:18 dialing manager at 10.128.0.163:30035
[   54.321241][ T5087] cgroup: Unknown subsys name 'net'
[   54.605774][ T5087] cgroup: Unknown subsys name 'rlimit'
[   55.742122][ T5114] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
[   55.755173][ T5114] syz-executor (5114) used greatest stack depth: 18704 bytes left
2024/06/15 13:12:26 starting 3 executor processes
[   62.281630][   T12] 
[   62.284191][   T12] =============================
[   62.289076][   T12] WARNING: suspicious RCU usage
[   62.294091][   T12] 6.10.0-rc3-syzkaller-00688-g934c29999b57 #0 Not tainted
[   62.301208][   T12] -----------------------------
[   62.306140][   T12] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage!
[   62.316047][   T12] 
[   62.316047][   T12] other info that might help us debug this:
[   62.316047][   T12] 
[   62.326769][   T12] 
2024/06/15 13:12:26 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF
[   62.326769][   T12] rcu_scheduler_active = 2, debug_locks = 1
[   62.335258][   T12] 3 locks held by kworker/u8:1/12:
[   62.340488][   T12]  #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[   62.351934][   T12]  #1: ffffc90000117d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[   62.362831][   T12]  #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[   62.372897][   T12] 
[   62.372897][   T12] stack backtrace:
[   62.378827][   T12] CPU: 0 PID: 12 C