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: 1543 Comm: kworker/1:2 Not tainted 6.16.0-rc2-syzkaller-00185-g010c40c1f50e #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: mld mld_ifc_work

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 80 47 98 8b be 4b 03 00 00 48 c7 c2 c0 47 98 8b e8 14 df 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 b4 5c f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc90000a08a98 EFLAGS: 00010206

RAX: 000000001fffe000 RBX: ffffffff822c7d39 RCX: be87420e1256e100
RDX: 0000000000000000 RSI: ffffffff8be28b60 RDI: ffffffff8be28b20
RBP: 0000000000000048 R08: 0000000000000000 R09: ffffffff822c7d39
R10: dffffc0000000000 R11: fffffbfff1f4221f R12: dffffc0000000000
R13: ffff8880b873b540 R14: 0000000000000001 R15: 00000000ffff0000
FS:  0000000000000000(0000) GS:ffff888125d51000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb7df09deb8 CR3: 0000000032dde000 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:770 [inline]
 refill_obj_stock+0x254/0x850 mm/memcontrol.c:3045
 __memcg_slab_free_hook+0x127/0x3d0 mm/memcontrol.c:3219
 memcg_slab_free_hook mm/slub.c:2206 [inline]
 slab_free mm/slub.c:4640 [inline]
 kfree+0x255/0x440 mm/slub.c:4842
 security_cred_free+0xbf/0x1d0 security/security.c:3225
 put_cred_rcu+0x6a/0x2e0 kernel/cred.c:78
 rcu_do_batch kernel/rcu/tree.c:2576 [inline]
 rcu_core+0xca5/0x1710 kernel/rcu/tree.c:2832
 handle_softirqs+0x286/0x870 kernel/softirq.c:579
 do_softirq+0xec/0x180 kernel/softirq.c:480
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x17d/0x1c0 kernel/softirq.c:407
 ipv6_get_lladdr+0x2aa/0x3f0 net/ipv6/addrconf.c:1937
 mld_newpack+0x420/0xc40 net/ipv6/mcast.c:1802
 add_grhead+0x5a/0x2a0 net/ipv6/mcast.c:1899
 add_grec+0x13b2/0x1670 net/ipv6/mcast.c:2037
 mld_send_cr net/ipv6/mcast.c:2163 [inline]
 mld_ifc_work+0x6e6/0xde0 net/ipv6/mcast.c:2702
 process_one_work kernel/workqueue.c:3238 [inline]
 process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
 kthread+0x70e/0x8a0 kernel/kthread.c:464
 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148
 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 80 47 98 8b be 4b 03 00 00 48 c7 c2 c0 47 98 8b e8 14 df 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 b4 5c f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc90000a08a98 EFLAGS: 00010206
RAX: 000000001fffe000 RBX: ffffffff822c7d39 RCX: be87420e1256e100
RDX: 0000000000000000 RSI: ffffffff8be28b60 RDI: ffffffff8be28b20
RBP: 0000000000000048 R08: 0000000000000000 R09: ffffffff822c7d39
R10: dffffc0000000000 R11: fffffbfff1f4221f R12: dffffc0000000000
R13: ffff8880b873b540 R14: 0000000000000001 R15: 00000000ffff0000
FS:  0000000000000000(0000) GS:ffff888125d51000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb7df09deb8 CR3: 0000000032dde000 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 80 47 98 8b be 4b 	movl   $0x34b,-0x417467b9(%rax)
   a:	03 00 00
   d:	48 c7 c2 c0 47 98 8b 	mov    $0xffffffff8b9847c0,%rdx
  14:	e8 14 df 71 ff       	call   0xff71df2d
  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 b4 5c f7 ff       	call   0xfff75ced
  39:	49 8b 07             	mov    (%r15),%rax
  3c:	a8 03                	test   $0x3,%al
  3e:	75 62                	jne    0xa2