=============================
WARNING: suspicious RCU usage
6.7.0-syzkaller #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: ffffffff835d9490 (rcu_callback){....}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
 #0: ffffffff835d9490 (rcu_callback){....}-{0:0}, at: rcu_do_batch kernel/rcu/tree.c:2152 [inline]
 #0: ffffffff835d9490 (rcu_callback){....}-{0:0}, at: rcu_core+0x426/0x970 kernel/rcu/tree.c:2433

stack backtrace:
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 6.7.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x8d/0xe0 lib/dump_stack.c:106
 lockdep_rcu_suspicious+0x15d/0x1b0 kernel/locking/lockdep.c:6712
 hash_netportnet6_destroy+0x61/0x100 net/netfilter/ipset/ip_set_hash_gen.h:455
 ip_set_destroy_set net/netfilter/ipset/ip_set_core.c:1180 [inline]
 ip_set_destroy_set_rcu+0x1b/0x60 net/netfilter/ipset/ip_set_core.c:1190
 rcu_do_batch kernel/rcu/tree.c:2158 [inline]
 rcu_core+0x466/0x970 kernel/rcu/tree.c:2433
 __do_softirq+0x157/0x3e9 kernel/softirq.c:553
 invoke_softirq kernel/softirq.c:427 [inline]
 __irq_exit_rcu+0x79/0x110 kernel/softirq.c:632
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:644
 sysvec_apic_timer_interrupt+0x92/0xb0 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:acpi_safe_halt+0x20/0x30 drivers/acpi/processor_idle.c:113
Code: 90 90 90 90 90 90 90 90 90 90 65 48 8b 05 18 65 9a 7d 48 f7 00 08 00 00 00 75 10 66 90 0f 00 2d d0 03 41 00 f3 0f 1e fa fb f4 <fa> c3 cc cc cc cc 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90
RSP: 0018:ffffc9000009be50 EFLAGS: 00000246
RAX: ffff888101299b80 RBX: ffff888100af4064 RCX: ffff888237d00000
RDX: 0000000000000001 RSI: ffff888100af4000 RDI: ffff888100af4064
RBP: ffff888100bba800 R08: 0000000c729ac0fa R09: 00000000000000ff
R10: 0000000000000003 R11: ffffffff82686c50 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000001 R15: ffffffff8369b4e0
 acpi_idle_enter+0xc1/0xe0 drivers/acpi/processor_idle.c:707
 cpuidle_enter_state+0xff/0x260 drivers/cpuidle/cpuidle.c:267
 cpuidle_enter+0x28/0x40 drivers/cpuidle/cpuidle.c:388
 call_cpuidle kernel/sched/idle.c:134 [inline]
 cpuidle_idle_call kernel/sched/idle.c:215 [inline]
 do_idle+0x1c8/0x270 kernel/sched/idle.c:312
 cpu_startup_entry+0x24/0x30 kernel/sched/idle.c:410
 start_secondary+0x99/0xa0 arch/x86/kernel/smpboot.c:336
 secondary_startup_64_no_verify+0x15f/0x16b
 </TASK>
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	65 48 8b 05 18 65 9a 	mov    %gs:0x7d9a6518(%rip),%rax        # 0x7d9a652a
  11:	7d
  12:	48 f7 00 08 00 00 00 	testq  $0x8,(%rax)
  19:	75 10                	jne    0x2b
  1b:	66 90                	xchg   %ax,%ax
  1d:	0f 00 2d d0 03 41 00 	verw   0x4103d0(%rip)        # 0x4103f4
  24:	f3 0f 1e fa          	endbr64
  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 2e 0f 1f 84 00 00 	cs nopw 0x0(%rax,%rax,1)
  37:	00 00 00
  3a:	90                   	nop
  3b:	90                   	nop
  3c:	90                   	nop
  3d:	90                   	nop
  3e:	90                   	nop
  3f:	90                   	nop