loop3: detected capacity change from 0 to 3
nfs4: Unknown parameter 'gcm(aes)'
------------[ cut here ]------------
percpu ref (io_ring_ctx_ref_free) <= 0 (-262782262434047) after switching to atomic
WARNING: lib/percpu-refcount.c:197 at percpu_ref_switch_to_atomic_rcu+0x3cc/0x480, CPU#0: syz-executor.1/286
Modules linked in:
CPU: 0 UID: 0 PID: 286 Comm: syz-executor.1 Tainted: G        W           6.17.0-rc4-next-20250901 #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 c0 99 e2 84 e8 25 ac e9 fe 90 <0f> 0b 90 90 e9 2b ff ff ff e8 56 de 5f ff e9 9e fe ff ff e8 dc de
RSP: 0018:ffff88806ce08e20 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8139de70
RDX: ffff88801bd9d280 RSI: ffffffff8139de7e RDI: 0000000000000001
RBP: 7fff11003c982700 R08: 0000000000000001 R09: ffffed100d9c4801
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88800e99ad00
R13: ffff88800e99ad20 R14: 0000000000000002 R15: 0000000000000003
FS:  000055559241f400(0000) GS:ffff8880e55d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc741adfac CR3: 000000003a4b1000 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:unwind_next_frame+0x1f2/0x2540
Code: 42 ff 39 c6 0f 83 75 17 00 00 48 b8 00 00 00 00 00 fc ff df 89 f2 48 8d 3c 95 ec a5 c9 86 49 89 f8 49 c1 e8 03 45 0f b6 04 00 <48> 89 f8 83 e0 07 83 c0 03 44 38 c0 7c 32 45 84 c0 74 2d 48 89 54
RSP: 0018:ffff8880392f7528 EFLAGS: 00000212
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff81b5f9f5
RDX: 000000000000b5f9 RSI: 000000000000b5f9 RDI: ffffffff86cc7dd0
RBP: ffff8880392f75f0 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000003bea3 R11: 0000000000000001 R12: ffff8880392f75f8
R13: ffff8880392f75e0 R14: ffff8880392f75d9 R15: ffff8880392f7598
kmemleak: Found object by alias at 0x607f1a63d1f4
CPU: 1 UID: 0 PID: 5904 Comm: syz-executor.4 Tainted: G        W           6.17.0-rc4-next-20250901 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xca/0x120
 __lookup_object+0x94/0xb0
 delete_object_full+0x27/0x70
 free_percpu+0x30/0x1160
 futex_hash_free+0x38/0xc0
 mmput+0x2d3/0x390
 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: 0033:0x7f6b390dab19
Code: Unable to access opcode bytes at 0x7f6b390daaef.
RSP: 002b:00007f6b36650218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f6b391edf68 RCX: 00007f6b390dab19
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f6b391edf68
RBP: 00007f6b391edf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f6b391edf6c
R13: 00007ffe092adeff R14: 00007f6b36650300 R15: 0000000000022000
 </TASK>
kmemleak: Object (percpu) 0x607f1a63d1f0 (size 8):
kmemleak:   comm "syz-executor.3", pid 5908, jiffies 4295018990
kmemleak:   min_count = 1
kmemleak:   count = 0
kmemleak:   flags = 0x21
kmemleak:   checksum = 0
kmemleak:   backtrace:
 pcpu_alloc_noprof+0x87a/0x1170
 __alloc_workqueue+0x74b/0x1820
 alloc_workqueue_noprof+0xc7/0x200
 loop_configure+0xf73/0x1590
 lo_ioctl+0x66d/0x1c70
 blkdev_ioctl+0x27c/0x6c0
 __x64_sys_ioctl+0x18f/0x210
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
 arch_stack_walk+0x86/0xf0
 stack_trace_save+0x8e/0xc0
 kasan_save_stack+0x24/0x50
 kasan_save_track+0x14/0x30
 __kasan_slab_alloc+0x59/0x70
 kmem_cache_alloc_noprof+0x205/0x690
 __alloc_object+0x2b/0x2c0
 __create_object+0x1d/0x80
 kmem_cache_alloc_noprof+0x414/0x690
 security_file_alloc+0x35/0x130
 init_file+0x95/0x4c0
 alloc_empty_file+0x76/0x1e0
 path_openat+0xe0/0x2880
 do_filp_open+0x1e8/0x450
 do_sys_openat2+0x104/0x1b0
 __x64_sys_openat+0x142/0x200
 do_syscall_64+0xbf/0x360
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2d286e4658
Code: 24 18 31 c0 41 83 e2 40 75 40 89 f0 25 00 00 41 00 3d 00 00 41 00 74 32 44 89 c2 4c 89 ce bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 77 40 48 8b 4c 24 18 64 48 2b 0c 25 28 00 00 00
RSP: 002b:00007ffc741adf20 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00000000000000a2 RCX: 00007f2d286e4658
RDX: 0000000000090800 RSI: 00007ffc741af110 RDI: 00000000ffffff9c
RBP: 00007ffc741af0ec R08: 0000000000090800 R09: 00007ffc741af110
R10: 0000000000000000 R11: 0000000000000287 R12: 00007f2d2873e105
R13: 00007ffc741af110 R14: 000000000000000f R15: 00007ffc741af150
 </TASK>
irq event stamp: 506536
hardirqs last  enabled at (506546): [<ffffffff81541b18>] __up_console_sem+0x78/0x80
hardirqs last disabled at (506557): [<ffffffff81541afd>] __up_console_sem+0x5d/0x80
softirqs last  enabled at (504984): [<ffffffff813bafcc>] handle_softirqs+0x50c/0x770
softirqs last disabled at (505097): [<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 ffff88800e99ad00 pointer offset 0 size 64
loop2: detected capacity change from 0 to 3
nfs4: Unknown parameter 'gcm(aes)'
loop3: detected capacity change from 0 to 3
nfs4: Unknown parameter 'gcm(aes)'
loop0: detected capacity change from 0 to 3
nfs4: Unknown parameter 'gcm(aes)'
loop7: detected capacity change from 0 to 3
nfs4: Unknown parameter 'gcm(aes)'
loop3: detected capacity change from 0 to 3
nfs4: Unknown parameter 'gcm(aes)'
loop2: detected capacity change from 0 to 3
nfs4: Unknown parameter 'gcm(aes)'
loop0: detected capacity change from 0 to 3
nfs4: Unknown parameter 'gcm(aes)'
----------------
Code disassembly (best guess):
   0:	42 ff                	rex.X (bad)
   2:	39 c6                	cmp    %eax,%esi
   4:	0f 83 75 17 00 00    	jae    0x177f
   a:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  11:	fc ff df
  14:	89 f2                	mov    %esi,%edx
  16:	48 8d 3c 95 ec a5 c9 	lea    -0x79365a14(,%rdx,4),%rdi
  1d:	86
  1e:	49 89 f8             	mov    %rdi,%r8
  21:	49 c1 e8 03          	shr    $0x3,%r8
  25:	45 0f b6 04 00       	movzbl (%r8,%rax,1),%r8d
* 2a:	48 89 f8             	mov    %rdi,%rax <-- trapping instruction
  2d:	83 e0 07             	and    $0x7,%eax
  30:	83 c0 03             	add    $0x3,%eax
  33:	44 38 c0             	cmp    %r8b,%al
  36:	7c 32                	jl     0x6a
  38:	45 84 c0             	test   %r8b,%r8b
  3b:	74 2d                	je     0x6a
  3d:	48                   	rex.W
  3e:	89                   	.byte 0x89
  3f:	54                   	push   %rsp