------------[ cut here ]------------
percpu ref (free_ioctx_users) <= 0 (-4294967295) after switching to atomic
WARNING: lib/percpu-refcount.c:197 at percpu_ref_switch_to_atomic_rcu+0x3cc/0x480, CPU#1: modprobe/4736
Modules linked in:
CPU: 1 UID: 0 PID: 4736 Comm: modprobe Tainted: G        W           6.17.0-rc3-next-20250829 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:percpu_ref_switch_to_atomic_rcu+0x3cc/0x480
Code: 00 00 00 00 00 fc ff df 48 89 f9 48 c1 e9 03 80 3c 01 00 0f 85 9e 00 00 00 49 8b 75 e8 48 c7 c7 80 97 e2 84 e8 75 c5 e9 fe 90 <0f> 0b 90 90 e9 2b ff ff ff e8 f6 de 5f ff e9 9e fe ff ff e8 7c df
RSP: 0018:ffff88806cf08e20 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8139de70
RDX: ffff8880158e0000 RSI: ffffffff8139de7e RDI: 0000000000000001
RBP: 7fffffff00000000 R08: 0000000000000001 R09: ffffed100d9e117f
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801f850000
R13: ffff88801f850020 R14: 0000000000000002 R15: 0000000000000003
FS:  0000000000000000(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc3e4c366f4 CR3: 0000000029d92000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 rcu_core+0x7c8/0x1800
 handle_softirqs+0x1b1/0x770
 __irq_exit_rcu+0xc4/0x100
 irq_exit_rcu+0x9/0x20
 sysvec_apic_timer_interrupt+0x70/0x80
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:lock_acquire+0x5b/0x2f0
Code: 30 31 c0 66 90 65 8b 05 e7 53 32 06 89 c0 48 0f a3 05 f9 cf f1 04 0f 82 3a 01 00 00 8b 35 d1 db f1 04 85 f6 0f 85 84 00 00 00 <48> 8b 44 24 30 65 48 2b 05 90 53 32 06 0f 85 6e 02 00 00 48 83 c4
RSP: 0018:ffff88803c147578 EFLAGS: 00000206
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 3913db4b9592e1dc
RDX: 00000000579175c5 RSI: 000000004004871e RDI: 00000000ec36b821
RBP: ffffffff85c1c760 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000002
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000200
 unwind_next_frame+0xcd/0x2540
 arch_stack_walk+0x86/0xf0
 stack_trace_save+0x8e/0xc0
 kasan_save_stack+0x24/0x50
 kasan_record_aux_stack+0x89/0xa0
 __call_rcu_common.constprop.0+0x70/0x960
 kmem_cache_free+0x33a/0x540
 unlink_anon_vmas+0x11d/0x740
 free_pgtables+0x202/0xbb0
 exit_mmap+0x39c/0xaa0
 mmput+0xd5/0x390
 do_exit+0x79d/0x2970
 do_group_exit+0xd3/0x2a0
 __x64_sys_exit_group+0x3e/0x50
 x64_sys_call+0x18c5/0x18d0
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc3e482e699
Code: Unable to access opcode bytes at 0x7fc3e482e66f.
RSP: 002b:00007ffe73b96578 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fc3e4923610 RCX: 00007fc3e482e699
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffff80 R09: 0000000000000001
R10: 0000000000000004 R11: 0000000000000246 R12: 00007fc3e4923610
R13: 0000000000000001 R14: 00007fc3e4923ae8 R15: 0000000000000000
 </TASK>
irq event stamp: 7402
hardirqs last  enabled at (7410): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (7419): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (6076): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (6323): [<ffffffff813bb364>] __irq_exit_rcu+0xc4/0x100
---[ end trace 0000000000000000 ]---
percpu_ref_switch_to_atomic_rcu: percpu_ref_switch_to_atomic_rcu(): percpu_ref underflow slab kmalloc-64 start ffff88801f850000 pointer offset 0 size 64
----------------
Code disassembly (best guess):
   0:	30 31                	xor    %dh,(%rcx)
   2:	c0 66 90 65          	shlb   $0x65,-0x70(%rsi)
   6:	8b 05 e7 53 32 06    	mov    0x63253e7(%rip),%eax        # 0x63253f3
   c:	89 c0                	mov    %eax,%eax
   e:	48 0f a3 05 f9 cf f1 	bt     %rax,0x4f1cff9(%rip)        # 0x4f1d00f
  15:	04
  16:	0f 82 3a 01 00 00    	jb     0x156
  1c:	8b 35 d1 db f1 04    	mov    0x4f1dbd1(%rip),%esi        # 0x4f1dbf3
  22:	85 f6                	test   %esi,%esi
  24:	0f 85 84 00 00 00    	jne    0xae
* 2a:	48 8b 44 24 30       	mov    0x30(%rsp),%rax <-- trapping instruction
  2f:	65 48 2b 05 90 53 32 	sub    %gs:0x6325390(%rip),%rax        # 0x63253c7
  36:	06
  37:	0f 85 6e 02 00 00    	jne    0x2ab
  3d:	48                   	rex.W
  3e:	83                   	.byte 0x83
  3f:	c4                   	.byte 0xc4