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: 1 UID: 0 PID: 63 Comm: kworker/u8:4 Not tainted 6.15.0-rc4-syzkaller-00163-ge8716b5b0dff #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/29/2025
Workqueue: netns cleanup_net
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 40 10 78 8b be 4b 03 00 00 48 c7 c2 80 10 78 8b e8 c4 0e 74 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 74 8b f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc90000a089b8 EFLAGS: 00010006
RAX: 000000001fffe000 RBX: ffffffff822a2959 RCX: ac3d25dad8748200
RDX: 0000000000000000 RSI: ffffffff8bc1cdc0 RDI: ffffffff8bc1cd80
RBP: ffffc90000a08ae0 R08: 0000000000000000 R09: 0000000000080000
R10: 0000000000000000 R11: ffffffff822a2959 R12: dffffc0000000000
R13: 00000000ffff0000 R14: 0000000000000001 R15: 00000000ffff0000
FS:  0000000000000000(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd23d47cf8 CR3: 0000000032db8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 percpu_ref_get include/linux/percpu-refcount.h:222 [inline]
 obj_cgroup_get include/linux/memcontrol.h:760 [inline]
 replace_stock_objcg mm/memcontrol.c:2774 [inline]
 refill_obj_stock+0x265/0x790 mm/memcontrol.c:2952
 obj_cgroup_uncharge mm/memcontrol.c:3015 [inline]
 __memcg_slab_free_hook+0x1ff/0x330 mm/memcontrol.c:3102
 memcg_slab_free_hook mm/slub.c:2223 [inline]
 slab_free mm/slub.c:4653 [inline]
 kmem_cache_free+0x21b/0x3f0 mm/slub.c:4758
 rcu_do_batch kernel/rcu/tree.c:2568 [inline]
 rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2824
 handle_softirqs+0x283/0x870 kernel/softirq.c:579
 __do_softirq kernel/softirq.c:613 [inline]
 invoke_softirq kernel/softirq.c:453 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:680
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1049
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_unregister_key+0x2ba/0x310 kernel/locking/lockdep.c:6613
Code: 00 65 48 8b 05 47 0d d7 10 48 3b 44 24 10 0f 84 30 fe ff ff e8 77 b3 b7 09 e8 a2 b4 b7 09 41 f7 c7 00 02 00 00 74 be fb 84 db <75> bd eb ce 90 0f 0b 90 31 db eb 89 90 0f 0b 90 e9 36 ff ff ff 48
RSP: 0018:ffffc90001557798 EFLAGS: 00000246
RAX: ac3d25dad8748200 RBX: 0000000000000000 RCX: ac3d25dad8748200
RDX: ffffffff9338d708 RSI: ffffffff8d75d44c RDI: ffffffff8bc1cde0
RBP: ffff88805e0c7299 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff81aafa28 R12: 0000000000000000
R13: 0000000000001000 R14: 0000000000000001 R15: 0000000000000a02
 __qdisc_destroy+0x166/0x3f0 net/sched/sch_generic.c:1080
 qdisc_put net/sched/sch_generic.c:1106 [inline]
 dev_shutdown+0x34c/0x440 net/sched/sch_generic.c:1494
 unregister_netdevice_many_notify+0xdb6/0x2330 net/core/dev.c:11969
 cleanup_net+0x6a3/0xbd0 net/core/net_namespace.c:649
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xadb/0x17a0 kernel/workqueue.c:3319
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </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 40 10 78 8b be 4b 03 00 00 48 c7 c2 80 10 78 8b e8 c4 0e 74 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 74 8b f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc90000a089b8 EFLAGS: 00010006
RAX: 000000001fffe000 RBX: ffffffff822a2959 RCX: ac3d25dad8748200
RDX: 0000000000000000 RSI: ffffffff8bc1cdc0 RDI: ffffffff8bc1cd80
RBP: ffffc90000a08ae0 R08: 0000000000000000 R09: 0000000000080000
R10: 0000000000000000 R11: ffffffff822a2959 R12: dffffc0000000000
R13: 00000000ffff0000 R14: 0000000000000001 R15: 00000000ffff0000
FS:  0000000000000000(0000) GS:ffff8881261cc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd23d47cf8 CR3: 0000000032db8000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	01 48 c7             	add    %ecx,-0x39(%rax)
   3:	c7 40 10 78 8b be 4b 	movl   $0x4bbe8b78,0x10(%rax)
   a:	03 00                	add    (%rax),%eax
   c:	00 48 c7             	add    %cl,-0x39(%rax)
   f:	c2 80 10             	ret    $0x1080
  12:	78 8b                	js     0xffffff9f
  14:	e8 c4 0e 74 ff       	call   0xff740edd
  19:	49 bc 00 00 00 00 00 	movabs $0xdffffc0000000000,%r12
  20:	fc ff df
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 ff             	mov    %r15,%rdi
  34:	e8 74 8b f7 ff       	call   0xfff78bad
  39:	49 8b 07             	mov    (%r15),%rax
  3c:	a8 03                	test   $0x3,%al
  3e:	75 62                	jne    0xa2