============================= WARNING: suspicious RCU usage 6.7.0-syzkaller #0 Not tainted ----------------------------- net/netfilter/ipset/ip_set_hash_gen.h:456 suspicious rcu_dereference_protected() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by syz-executor.0/2148: #0: ffffffff831de040 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline] #0: ffffffff831de040 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2152 [inline] #0: ffffffff831de040 (rcu_callback){....}-{0:0}, at: rcu_core+0x2d3/0x980 kernel/rcu/tree.c:2431 stack backtrace: CPU: 1 PID: 2148 Comm: syz-executor.0 Not tainted 6.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x7e/0xb0 lib/dump_stack.c:106 lockdep_rcu_suspicious+0x158/0x1e0 kernel/locking/lockdep.c:6712 hash_ip4_destroy+0x132/0x140 net/netfilter/ipset/ip_set_hash_gen.h:456 ip_set_destroy_set+0x13/0x50 net/netfilter/ipset/ip_set_core.c:1180 rcu_do_batch kernel/rcu/tree.c:2158 [inline] rcu_core+0x380/0x980 kernel/rcu/tree.c:2431 __do_softirq+0x16e/0x43c kernel/softirq.c:553 invoke_softirq kernel/softirq.c:427 [inline] __irq_exit_rcu kernel/softirq.c:632 [inline] irq_exit_rcu+0x9a/0xf0 kernel/softirq.c:644 sysvec_apic_timer_interrupt+0x43/0xb0 arch/x86/kernel/apic/apic.c:1076 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649 RIP: 0033:0x7f7cdba7eb27 Code: f0 ff ff 77 06 c3 0f 1f 44 00 00 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 29 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffdfecee958 EFLAGS: 00000206 RAX: 0000000000000003 RBX: 0000000000000003 RCX: 00007f7cdba7eb27 RDX: 0000000000000006 RSI: 0000000000000001 RDI: 0000000000000002 RBP: 00007ffdfecef0ac R08: 00007ffdfecee9ac R09: 00007ffdfeceed97 R10: 00007ffdfeceea00 R11: 0000000000000206 R12: 00007f7cdbb7bd00 R13: 000000000000cd9e R14: 000000000000cd9b R15: 00007f7cdbb7dec0