last executing test programs:

496.281432ms ago: executing program 0:
ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000))

428.754613ms ago: executing program 1:
sendmmsg(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0)

377.297361ms ago: executing program 2:
sendmsg(0xffffffffffffffff, &(0x7f0000000000), 0x0)

119.597541ms ago: executing program 0:
getsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), &(0x7f0000000000))

113.558732ms ago: executing program 1:
socket$inet6_udp(0xa, 0x2, 0x0)

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

kernel console output (not intermixed with test programs):

Warning: Permanently added '10.128.10.55' (ED25519) to the list of known hosts.
2024/06/17 14:55:47 fuzzer started
2024/06/17 14:55:47 dialing manager at 10.128.0.163:30035
[   57.790472][ T5092] cgroup: Unknown subsys name 'net'
[   58.008471][ T5092] cgroup: Unknown subsys name 'rlimit'
[   59.211407][ T5115] Adding 124996k swap on ./swap-file.  Priority:0 extents:1 across:124996k 
2024/06/17 14:55:54 starting 3 executor processes
[   65.284336][   T51] 
[   65.286837][   T51] =============================
[   65.292245][   T51] WARNING: suspicious RCU usage
[   65.297222][   T51] 6.10.0-rc3-syzkaller-00696-g4314175af496 #0 Not tainted
[   65.305030][   T51] -----------------------------
[   65.310205][   T51] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage!
[   65.320072][   T51] 
[   65.320072][   T51] other info that might help us debug this:
[   65.320072][   T51] 
[   65.330414][   T51] 
2024/06/17 14:55:55 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF
[   65.330414][   T51] rcu_scheduler_active = 2, debug_locks = 1
[   65.338504][   T51] 3 locks held by kworker/u8:3/51:
[   65.343782][   T51]  #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[   65.355004][   T51]  #1: ffffc90000bb7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[   65.365657][   T51]  #2: ffffffff8f5db650 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[   65.375204][   T51] 
[   65.375204][   T51] stack backtrace:
[   65.381158][   T51] CPU: 0 PID: 51 Comm