Oops: general protection fault, probably for non-canonical address 0xdffffc001fffc000: 0000 [#1] SMP KASAN PTI
KASAN: probably user-memory-access in range [0x00000000fffe0000-0x00000000fffe0007]
CPU: 0 UID: 0 PID: 11629 Comm: syz.0.1544 Not tainted 6.16.0-syzkaller-06574-gd9104cec3e8f #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 00 51 98 8b be 4b 03 00 00 48 c7 c2 40 51 98 8b e8 a4 24 72 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 04 5d f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc9001bdf7a40 EFLAGS: 00010006
RAX: 000000001fffc000 RBX: ffffffff822b7619 RCX: 281598b740d27300
RDX: 0000000000000000 RSI: ffffffff8be309e0 RDI: ffffffff8be309a0
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822b7619
R10: dffffc0000000000 R11: fffffbfff1f40f5f R12: dffffc0000000000
R13: ffff8880b863b500 R14: 0000000000000001 R15: 00000000fffe0000
FS:  00007ff5cbfa16c0(0000) GS:ffff888125c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000404030 CR3: 000000007857c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 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:3043
 __memcg_slab_free_hook+0x127/0x3d0 mm/memcontrol.c:3217
 memcg_slab_free_hook mm/slub.c:2206 [inline]
 slab_free mm/slub.c:4640 [inline]
 kmem_cache_free+0x223/0x400 mm/slub.c:4745
 __sigqueue_free kernel/signal.c:475 [inline]
 collect_signal kernel/signal.c:587 [inline]
 __dequeue_signal+0x487/0x5b0 kernel/signal.c:609
 dequeue_signal+0x140/0x370 kernel/signal.c:629
 get_signal+0x55f/0x1340 kernel/signal.c:2914
 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:208 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff5cb18eb69
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff5cbfa1038 EFLAGS: 00000246
RAX: 0000000000010106 RBX: 00007ff5cb3b6080 RCX: 00007ff5cb18eb69
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000009
RBP: 00007ff5cb211df1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007ff5cb3b6080 R15: 00007ffd14e42f38
 </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 00 51 98 8b be 4b 03 00 00 48 c7 c2 40 51 98 8b e8 a4 24 72 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 04 5d f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc9001bdf7a40 EFLAGS: 00010006
RAX: 000000001fffc000 RBX: ffffffff822b7619 RCX: 281598b740d27300
RDX: 0000000000000000 RSI: ffffffff8be309e0 RDI: ffffffff8be309a0
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822b7619
R10: dffffc0000000000 R11: fffffbfff1f40f5f R12: dffffc0000000000
R13: ffff8880b863b500 R14: 0000000000000001 R15: 00000000fffe0000
FS:  00007ff5cbfa16c0(0000) GS:ffff888125c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000404030 CR3: 000000007857c000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 c7 c7 00 51 98 8b 	mov    $0xffffffff8b985100,%rdi
   7:	be 4b 03 00 00       	mov    $0x34b,%esi
   c:	48 c7 c2 40 51 98 8b 	mov    $0xffffffff8b985140,%rdx
  13:	e8 a4 24 72 ff       	call   0xff7224bc
  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 04 5d f7 ff       	call   0xfff75d3c
  38:	49 8b 07             	mov    (%r15),%rax
  3b:	a8 03                	test   $0x3,%al
  3d:	75 62                	jne    0xa1