last executing test programs: 476.069897ms ago: executing program 0: ioctl(0xffffffffffffffff, 0x0, &(0x7f0000000000)) 338.723048ms ago: executing program 1: getsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), &(0x7f0000000000)) 319.290001ms ago: executing program 2: shutdown(0xffffffffffffffff, 0x0) 214.909837ms ago: executing program 0: setsockopt(0xffffffffffffffff, 0x0, 0x0, &(0x7f0000000000), 0x0) 0s ago: executing program 2: bpf$BPF_BTF_GET_FD_BY_ID(0x13, &(0x7f0000000000), 0x0) kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.29' (ED25519) to the list of known hosts. 2024/06/20 00:49:35 fuzzer started 2024/06/20 00:49:35 dialing manager at 10.128.0.163:30035 [ 55.478499][ T5089] cgroup: Unknown subsys name 'net' [ 55.764975][ T5089] cgroup: Unknown subsys name 'rlimit' [ 56.869064][ T5105] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k 2024/06/20 00:49:43 starting 3 executor processes [ 63.607600][ T51] [ 63.610148][ T51] ============================= [ 63.615123][ T51] WARNING: suspicious RCU usage [ 63.619990][ T51] 6.10.0-rc3-syzkaller-00732-gc8bd1f7f3e61 #0 Not tainted [ 63.627224][ T51] ----------------------------- [ 63.632444][ T51] net/netfilter/ipset/ip_set_core.c:1200 suspicious rcu_dereference_protected() usage! [ 63.642141][ T51] [ 63.642141][ T51] other info that might help us debug this: [ 63.642141][ T51] [ 63.652792][ T51] 2024/06/20 00:49:44 SYZFATAL: failed to recv *flatrpc.HostMessageRaw: EOF [ 63.652792][ T51] rcu_scheduler_active = 2, debug_locks = 1 [ 63.660880][ T51] 3 locks held by kworker/u8:3/51: [ 63.666068][ T51] #0: ffff888015edd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 [ 63.677224][ T51] #1: ffffc90000bb7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 [ 63.688623][ T51] #2: ffffffff8f5da110 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 [ 63.698450][ T51] [ 63.698450][ T51] stack backtrace: [ 63.704482][ T51] CPU: 1 PID: 51 Comm: kworker/u8:3 Not tainted 6.10.0-rc3-syzkaller-00732-gc8bd1f7f3e61 #0 [ 63.714652][ T51] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 [ 63.724736][ T51] Workqueue: netns cleanup_net [ 63.729605][ T51] Call Trace: [ 63.732978][ T51] [ 63.736011][ T51] dump_stack_lvl+0x241/0x360 [ 63.740916][ T51] ? __pfx_dump_stack_lvl+0x10/0x10 [ 63.746139][ T51] ? __pfx__printk+0x10/0x10 [ 63.750845][ T51] lockdep_rcu_suspicious+0x221/0x340 [ 63.756243][ T51] _destroy_all_sets+0x232/0x5f0 [ 63.761203][ T51] ip_set_net_exit+0x20/0x50 [ 63.765952][ T51] cleanup_net+0x802/0xcc0 [ 63.770582][ T51] ? __pfx_cleanup_net+0x10/0x10 [ 63.775655][ T51] ? process_scheduled_works+0x945/0x1830 [ 63.781406][ T51] process_scheduled_works+0xa2c/0x1830 [ 63.787090][ T51] ? __pfx_process_scheduled_works+0x10/0x10 [ 63.793099][ T51] ? assign_work+0x364/0x3d0 [ 63.797716][ T51] worker_thread+0x86d/0xd70 [ 63.802339][ T51] ? __kthread_parkme+0x169/0x1d0 [ 63.807747][ T51] ? __pfx_worker_thread+0x10/0x10 [ 63.812881][ T51] kthread+0x2f0/0x390 [ 63.816979][ T51] ? __pfx_worker_thread+0x10/0x10 [ 63.822109][ T51] ? __pfx_kthread+0x10/0x10 [ 63.826894][ T51] ret_from_fork+0x4b/0x80 [ 63.831417][ T51] ? __pfx_kthread+0x10/0x10 [ 63.836053][ T51] ret_from_fork_asm+0x1a/0x30 [ 63.840862][ T51] [ 63.846324][ T51] [ 63.848688][ T51] ============================= [ 63.853726][ T51] WARNING: suspicious RCU usage [