ext4 filesystem being mounted at /syzkaller-testdir742776933/syzkaller.woievK/4/file0 supports timestamps until 2038-01-19 (0x7fffffff)
------------[ cut here ]------------
percpu ref (free_ioctx_users) <= 0 (-6) after switching to atomic
WARNING: lib/percpu-refcount.c:197 at percpu_ref_switch_to_atomic_rcu+0x3cc/0x480, CPU#1: syz-executor.7/4029
Modules linked in:
CPU: 1 UID: 0 PID: 4029 Comm: syz-executor.7 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: ffff8880194e5280 RSI: ffffffff8139de7e RDI: 0000000000000001
RBP: 7ffffffffffffff9 R08: 0000000000000001 R09: ffffed100d9e117f
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88801f219280
R13: ffff88801f2192a0 R14: 0000000000000002 R15: 0000000000000003
FS:  0000000000000000(0000) GS:ffff8880e56dd000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff483304000 CR3: 0000000037429000 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:debug_lockdep_rcu_enabled+0xa/0x40
Code: 00 eb c1 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 8b 05 c6 1f 88 01 <85> c0 74 20 8b 05 c0 2a 88 01 85 c0 74 16 65 48 8b 05 98 a2 c8 02
RSP: 0018:ffff888046f873d0 EFLAGS: 00000296
RAX: 0000000000000002 RBX: 0000000000000001 RCX: a34e7de4331a52e2
RDX: 000000009d1c2de6 RSI: 00000000728ca38d RDI: 000000005e3bf3b8
RBP: ffff888046f874a8 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: ffff888046f87498 R14: ffff8880194e5280 R15: ffff888046f87450
 unwind_next_frame+0xd2/0x2540
 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+0x1c8/0xbb0
 exit_mmap+0x39c/0xaa0
 mmput+0xd5/0x390
 do_exit+0x79d/0x2970
 do_group_exit+0xd3/0x2a0
 get_signal+0x2315/0x2340
 arch_do_signal_or_restart+0x80/0x790
 exit_to_user_mode_loop+0x8b/0x110
 do_syscall_64+0x2f7/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3c400758ac
Code: Unable to access opcode bytes at 0x7f3c40075882.
RSP: 002b:00007f3c3d616020 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: 0000000000000020 RBX: 00007f3c3d616110 RCX: 00007f3c400758ac
RDX: 0000000000000020 RSI: 00007f3c3d616160 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007f3c3d616074 R09: 000000000000000c
R10: 0000000000000000 R11: 0000000000000293 R12: 00007f3c3d6160c8
R13: 00007f3c3d616160 R14: 0000000000000003 R15: 0000000000000000
 </TASK>
irq event stamp: 4094
hardirqs last  enabled at (4104): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (4113): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (2380): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (2545): [<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 ffff88801f219280 pointer offset 0 size 64
EXT4-fs (loop1): unmounting filesystem 00000000-0000-0000-0000-000000000000.
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	eb c1                	jmp    0xffffffc3
   2:	66 2e 0f 1f 84 00 00 	nopw   %cs:0x0(%rax,%rax,1)
   9:	00 00 00
   c:	0f 1f 00             	nopl   (%rax)
   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:	90                   	nop
  1c:	90                   	nop
  1d:	90                   	nop
  1e:	90                   	nop
  1f:	f3 0f 1e fa          	endbr64
  23:	8b 05 c6 1f 88 01    	mov    0x1881fc6(%rip),%eax        # 0x1881fef
* 29:	85 c0                	test   %eax,%eax <-- trapping instruction
  2b:	74 20                	je     0x4d
  2d:	8b 05 c0 2a 88 01    	mov    0x1882ac0(%rip),%eax        # 0x1882af3
  33:	85 c0                	test   %eax,%eax
  35:	74 16                	je     0x4d
  37:	65 48 8b 05 98 a2 c8 	mov    %gs:0x2c8a298(%rip),%rax        # 0x2c8a2d7
  3e:	02