Oops: general protection fault, probably for non-canonical address 0xdffffc001fffe000: 0000 [#1] SMP KASAN PTI
KASAN: probably user-memory-access in range [0x00000000ffff0000-0x00000000ffff0007]
CPU: 0 UID: 0 PID: 24553 Comm: udevd Not tainted 6.16.0-next-20250807-syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:174 [inline]
RIP: 0010:percpu_ref_get_many+0x8d/0x140 include/linux/percpu-refcount.h:204
Code: 01 48 c7 c7 20 4d 98 8b be 4b 03 00 00 48 c7 c2 60 4d 98 8b e8 c4 b5 71 ff 49 bc 00 00 00 00 00 fc ff df 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 e4 4d f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc90003837598 EFLAGS: 00010206
RAX: 000000001fffe000 RBX: ffffffff822bd129 RCX: 57e5910982b58500
RDX: 0000000000000000 RSI: ffffffff8be34560 RDI: ffffffff8be34520
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822bd129
R10: dffffc0000000000 R11: fffffbfff1f47287 R12: dffffc0000000000
R13: ffff8880b863b540 R14: 0000000000000001 R15: 00000000ffff0000
FS:  00007fd25feab880(0000) GS:ffff888125c16000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555dc0e588 CR3: 0000000031e0c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 percpu_ref_get include/linux/percpu-refcount.h:222 [inline]
 obj_cgroup_get include/linux/memcontrol.h:772 [inline]
 refill_obj_stock+0x254/0x850 mm/memcontrol.c:3042
 __memcg_slab_free_hook+0x127/0x3d0 mm/memcontrol.c:3216
 memcg_slab_free_hook mm/slub.c:2242 [inline]
 slab_free mm/slub.c:4677 [inline]
 kmem_cache_free+0x223/0x400 mm/slub.c:4782
 anon_vma_chain_free mm/rmap.c:147 [inline]
 unlink_anon_vmas+0x2cc/0x670 mm/rmap.c:421
 free_pgtables+0x57a/0x9c0 mm/memory.c:398
 vms_clear_ptes+0x424/0x540 mm/vma.c:1233
 vms_complete_munmap_vmas+0x206/0x8a0 mm/vma.c:1277
 do_vmi_align_munmap+0x358/0x420 mm/vma.c:1536
 do_vmi_munmap+0x253/0x2e0 mm/vma.c:1584
 __vm_munmap+0x23b/0x3d0 mm/vma.c:3155
 __do_sys_munmap mm/mmap.c:1080 [inline]
 __se_sys_munmap mm/mmap.c:1077 [inline]
 __x64_sys_munmap+0x60/0x70 mm/mmap.c:1077
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd25f71e097
Code: 73 01 c3 48 8b 0d 61 2d 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 2d 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc82ba43f8 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 000055adf97f1290 RCX: 00007fd25f71e097
RDX: 000055adf97fdc88 RSI: 0000000000000200 RDI: 00007fd25fe81000
RBP: 0000000000000014 R08: 0000000000000040 R09: 0000000000000003
R10: 0000000000000040 R11: 0000000000000246 R12: 000055adf97fa000
R13: 00007fd25ffd239c R14: 0000000000002800 R15: 0000000000000009
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__ref_is_percpu include/linux/percpu-refcount.h:174 [inline]
RIP: 0010:percpu_ref_get_many+0x8d/0x140 include/linux/percpu-refcount.h:204
Code: 01 48 c7 c7 20 4d 98 8b be 4b 03 00 00 48 c7 c2 60 4d 98 8b e8 c4 b5 71 ff 49 bc 00 00 00 00 00 fc ff df 4c 89 f8 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 ff e8 e4 4d f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc90003837598 EFLAGS: 00010206
RAX: 000000001fffe000 RBX: ffffffff822bd129 RCX: 57e5910982b58500
RDX: 0000000000000000 RSI: ffffffff8be34560 RDI: ffffffff8be34520
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822bd129
R10: dffffc0000000000 R11: fffffbfff1f47287 R12: dffffc0000000000
R13: ffff8880b863b540 R14: 0000000000000001 R15: 00000000ffff0000
FS:  00007fd25feab880(0000) GS:ffff888125c16000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055555dc0e588 CR3: 0000000031e0c000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 c7 c7 20 4d 98 8b 	mov    $0xffffffff8b984d20,%rdi
   7:	be 4b 03 00 00       	mov    $0x34b,%esi
   c:	48 c7 c2 60 4d 98 8b 	mov    $0xffffffff8b984d60,%rdx
  13:	e8 c4 b5 71 ff       	call   0xff71b5dc
  18:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  1f:	fc ff df
  22:	4c 89 f8             	mov    %r15,%rax
  25:	48 c1 e8 03          	shr    $0x3,%rax
* 29:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 e4 4d f7 ff       	call   0xfff74e1c
  38:	49 8b 07             	mov    (%r15),%rax
  3b:	a8 03                	test   $0x3,%al
  3d:	75 62                	jne    0xa1