=============================
WARNING: suspicious RCU usage
6.8.0-rc2-syzkaller-00198-g41b9fb381a48 #0 Not tainted
-----------------------------
net/netfilter/ipset/ip_set_hash_gen.h:455 suspicious rcu_dereference_protected() usage!

other info that might help us debug this:


rcu_scheduler_active = 2, debug_locks = 1
1 lock held by swapper/1/0:
 #0: ffffffff8d5ad540 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff8d5ad540 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2184 [inline]
 #0: ffffffff8d5ad540 (rcu_callback){....}-{0:0}, at: rcu_core+0x7bd/0x1680 kernel/rcu/tree.c:2465

stack backtrace:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.8.0-rc2-syzkaller-00198-g41b9fb381a48 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x125/0x1b0 lib/dump_stack.c:106
 lockdep_rcu_suspicious+0x20c/0x3b0 kernel/locking/lockdep.c:6712
 hash_netportnet6_destroy+0x2c4/0x3a0 net/netfilter/ipset/ip_set_hash_gen.h:455
 ip_set_destroy_set+0x65/0x100 net/netfilter/ipset/ip_set_core.c:1180
 rcu_do_batch kernel/rcu/tree.c:2190 [inline]
 rcu_core+0x819/0x1680 kernel/rcu/tree.c:2465
 __do_softirq+0x21c/0x8e7 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu kernel/softirq.c:632 [inline]
 irq_exit_rcu+0xbb/0x120 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x95/0xb0 arch/x86/kernel/apic/apic.c:1076
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:37 [inline]
RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:72 [inline]
RIP: 0010:default_idle+0xf/0x20 arch/x86/kernel/process.c:743
Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d a3 93 2c 00 fb f4 <fa> c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
RSP: 0018:ffffc90000457e08 EFLAGS: 00000246
RAX: 00000000004d0b27 RBX: 0000000000000001 RCX: ffffffff8ab9fe1b
RDX: 0000000000000000 RSI: ffffffff8aecaf20 RDI: ffffffff8b4db980
RBP: ffffed1002b7f000 R08: 0000000000000001 R09: ffffed1005866ded
R10: ffff88802c336f6b R11: 0000000000000000 R12: 0000000000000001
R13: ffff888015bf8000 R14: ffffffff8f791090 R15: 0000000000000000
 default_idle_call+0x69/0xa0 kernel/sched/idle.c:97
 cpuidle_idle_call kernel/sched/idle.c:170 [inline]
 do_idle+0x336/0x400 kernel/sched/idle.c:312
 cpu_startup_entry+0x50/0x60 kernel/sched/idle.c:410
 start_secondary+0x220/0x2b0 arch/x86/kernel/smpboot.c:336
 secondary_startup_64_no_verify+0x170/0x17b
 </TASK>
----------------
Code disassembly (best guess):
   0:	4c 01 c7             	add    %r8,%rdi
   3:	4c 29 c2             	sub    %r8,%rdx
   6:	e9 72 ff ff ff       	jmp    0xffffff7d
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	90                   	nop
  11:	90                   	nop
  12:	90                   	nop
  13:	90                   	nop
  14:	90                   	nop
  15:	90                   	nop
  16:	90                   	nop
  17:	90                   	nop
  18:	90                   	nop
  19:	90                   	nop
  1a:	90                   	nop
  1b:	f3 0f 1e fa          	endbr64
  1f:	66 90                	xchg   %ax,%ax
  21:	0f 00 2d a3 93 2c 00 	verw   0x2c93a3(%rip)        # 0x2c93cb
  28:	fb                   	sti
  29:	f4                   	hlt
* 2a:	fa                   	cli <-- trapping instruction
  2b:	c3                   	ret
  2c:	cc                   	int3
  2d:	cc                   	int3
  2e:	cc                   	int3
  2f:	cc                   	int3
  30:	66 66 2e 0f 1f 84 00 	data16 cs nopw 0x0(%rax,%rax,1)
  37:	00 00 00 00
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop