last executing test programs:
349.408577ms ago: executing program 2:
sendmsg(0xffffffffffffffff, &(0x7f0000000000), 0x0)
201.348109ms ago: executing program 0:
getsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), &(0x7f0000000000))
87.578587ms ago: executing program 1:
ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000))
0s ago: executing program 2:
write(0xffffffffffffffff, &(0x7f0000000000), 0x0)
kernel console output (not intermixed with test programs):
Warning: Permanently added '10.128.0.190' (ED25519) to the list of known hosts.
2024/06/20 11:06:50 fuzzer started
2024/06/20 11:06:50 dialing manager at 10.128.0.163:30035
syzkaller login: [ 53.115156][ T5092] cgroup: Unknown subsys name 'net'
[ 53.407400][ T5092] cgroup: Unknown subsys name 'rlimit'
[ 54.604877][ T5119] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 54.617691][ T5119] syz-executor (5119) used greatest stack depth: 18800 bytes left
2024/06/20 11:06:55 starting 3 executor processes
[ 58.139793][ T35]
[ 58.142430][ T35] =============================
[ 58.147306][ T35] WARNING: suspicious RCU usage
[ 58.152779][ T35] 6.10.0-rc3-syzkaller-00750-g7e8fcb815432 #0 Not tainted
[ 58.160409][ T35] -----------------------------
[ 58.165278][ T35] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage!
[ 58.175342][ T35]
[ 58.175342][ T35] other info that might help us debug this:
[ 58.175342][ T35]
[ 58.185903][ T35]
2024/06/20 11:06:56 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF
[ 58.185903][ T35] rcu_scheduler_active = 2, debug_locks = 1
[ 58.194048][ T35] 3 locks held by kworker/u8:2/35:
[ 58.199350][ T35] #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[ 58.210718][ T35] #1: ffffc90000ab7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[ 58.221386][ T35] #2: ffffffff8f5da110 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[ 58.231169][ T35]
[ 58.231169][ T35] stack backtrace:
[ 58.237117][ T35] CPU: 1 PID: 35 Comm: kworker/u8:2 Not tainted 6.10.0-rc3-syzkaller-00750-g7e8fcb815432 #0
[ 58.247231][ T35] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
[ 58.257355][ T35] Workqueue: netns cleanup_net
[ 58.262180][ T35] Call Trace:
[ 58.265656][ T35]
[ 58.268618][ T35] dump_stack_lvl+0x241/0x360
[ 58.273359][ T35] ? __pfx_dump_stack_lvl+0x10/0x10
[ 58.278600][ T35] ? __pfx__printk+0x10/0x10
[ 58.283237][ T35] lockdep_rcu_suspicious+0x221/0x340
[ 58.288798][ T35] _destroy_all_sets+0x232/0x5f0
[ 58.293775][ T35] ip_set_net_exit+0x20/0x50
[ 58.298460][ T35] cleanup_net+0x802/0xcc0
[ 58.302994][ T35] ? __pfx_cleanup_net+0x10/0x10
[ 58.308367][ T35] ? process_scheduled_works+0x945/0x1830
[ 58.314172][ T35] process_scheduled_works+0xa2c/0x1830
[ 58.319736][ T35] ? __pfx_process_scheduled_works+0x10/0x10
[ 58.325713][ T35] ? assign_work+0x364/0x3d0
[ 58.330386][ T35] worker_thread+0x86d/0xd70
[ 58.335072][ T35] ? _raw_spin_unlock_irqrestore+0xdd/0x140
[ 58.341234][ T35] ? __kthread_parkme+0x169/0x1d0
[ 58.346675][ T35] ? __pfx_worker_thread+0x10/0x10
[ 58.351886][ T35] kthread+0x2f0/0x390
[ 58.356011][ T35] ? __pfx_worker_thread+0x10/0x10
[ 58.361251][ T35] ? __pfx_kthread+0x10/0x10
[ 58.365973][ T35] ret_from_fork+0x4b/0x80
[ 58.370517][ T35] ? __pfx_kthread+0x10/0x10
[ 58.375155][ T35] ret_from_fork_asm+0x1a/0x30
[ 58.380116][ T35]
[ 58.385386][ T35]
[ 58.387773][ T35] =============================
[ 58.393198][ T35] WARNING: suspicious RCU usage
[ 58.398064][ T35] 6.10.0-rc3-syzkaller-00750-g7e8fcb815432 #0 Not tainted
[ 58.405605][ T35] -----------------------------
[ 58.410844][ T35] net/netfilter/ipset/ip_set_core.c:1211 suspicious rcu_dereference_protected() usage!
[ 58.420829][ T35]
[ 58.420829][ T35] other info that might help us debug this:
[ 58.420829][ T35]
[ 58.431314][ T35]
[ 58.431314][ T35] rcu_scheduler_active = 2, debug_locks = 1
[ 58.439566][ T35] 3 locks held by kworker/u8:2/35:
[ 58.444700][ T35] #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830
[ 58.455784][ T35] #1: ffffc90000ab7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830
[ 58.467122][ T35] #2: ffffffff8f5da110 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0
[ 58.476684][ T35]
[ 58.476684][ T35] stack backtrace:
[ 58.482892][ T35] CPU: 1 PID: 35 Comm: kworker/u8:2 Not tainted 6.10.0-rc3-syzkaller-00750-g7e8fcb815432 #0
[ 58.493164][ T35] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
[ 58.503328][ T35] Workqueue: netns cleanup_net
[ 58.508237][ T35] Call Trace:
[ 58.511550][ T35]
[ 58.514524][ T35] dump_stack_lvl+0x241/0x360
[ 58.519257][ T35] ? __pfx_dump_stack_lvl+0x10/0x10
[ 58.524474][ T35] ? __pfx__printk+0x10/0x10
[ 58.529178][ T35] lockdep_rcu_suspicious+0x221/0x340
[ 58.534581][ T35] _destroy_all_sets+0x53f/0x5f0
[ 58.539641][ T35] ip_set_net_exit+0x20/0x50
[ 58.544245][ T35] cleanup_net+0x802/0xcc0
[ 58.549238][ T35] ? __pfx_cleanup_net+0x10/0x10
[ 58.554229][ T35] ? process_scheduled_works+0x945/0x1830
[ 58.559987][ T35] process_scheduled_works+0xa2c/0x1830
[ 58.565586][ T35] ? __pfx_process_scheduled_works+0x10/0x10
[ 58.571691][ T35] ? assign_work+0x364/0x3d0
[ 58.576309][ T35] worker_thread+0x86d/0xd70
[ 58.580924][ T35] ? _raw_spin_unlock_irqrestore+0xdd/0x140
[ 58.586949][ T35] ? __kthread_parkme+0x169/0x1d0
[