============================= WARNING: suspicious RCU usage 6.1.95-syzkaller #0 Not tainted ----------------------------- net/netfilter/ipset/ip_set_core.c:1202 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 3 locks held by kworker/u4:1/11: #0: ffff888012616938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #1: ffffc90000107d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #2: ffffffff8e28d9d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf1/0xb60 net/core/net_namespace.c:566 stack backtrace: CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.95-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024 Workqueue: netns cleanup_net Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 lockdep_rcu_suspicious+0x21c/0x330 kernel/locking/lockdep.c:6592 _destroy_all_sets+0x22c/0x5e0 net/netfilter/ipset/ip_set_core.c:1202 ip_set_net_exit+0x1c/0x50 net/netfilter/ipset/ip_set_core.c:2398 ops_exit_list net/core/net_namespace.c:172 [inline] cleanup_net+0x6ce/0xb60 net/core/net_namespace.c:604 process_one_work+0x8a9/0x11d0 kernel/workqueue.c:2292 worker_thread+0xa47/0x1200 kernel/workqueue.c:2439 kthread+0x28d/0x320 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 ============================= WARNING: suspicious RCU usage 6.1.95-syzkaller #0 Not tainted ----------------------------- net/netfilter/ipset/ip_set_core.c:1213 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 3 locks held by kworker/u4:1/11: #0: ffff888012616938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #1: ffffc90000107d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7a9/0x11d0 kernel/workqueue.c:2267 #2: ffffffff8e28d9d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf1/0xb60 net/core/net_namespace.c:566 stack backtrace: CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted 6.1.95-syzkaller #0 Hardware name: Google Go