Oops: general protection fault, probably for non-canonical address 0xdffffc001fffa000: 0000 [#1] SMP KASAN PTI
KASAN: probably user-memory-access in range [0x00000000fffd0000-0x00000000fffd0007]
CPU: 1 UID: 0 PID: 8022 Comm: cmp Not tainted 6.16.0-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 00 2b 98 8b be 4b 03 00 00 48 c7 c2 40 2b 98 8b e8 54 b8 75 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 60 f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc900046176f8 EFLAGS: 00010206
RAX: 000000001fffa000 RBX: ffffffff8228abc9 RCX: 430dd21648f78b00
RDX: 0000000000000000 RSI: ffffffff8be1ba20 RDI: ffffffff8be1b9e0
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff8228abc9
R10: dffffc0000000000 R11: fffffbfff1f4167f R12: dffffc0000000000
R13: ffff8880b873b3c0 R14: 0000000000000001 R15: 00000000fffd0000
FS:  0000000000000000(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f777cf86e9c CR3: 000000000df38000 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
 anon_vma_chain_free mm/rmap.c:147 [inline]
 unlink_anon_vmas+0x2cc/0x670 mm/rmap.c:421
 free_pgtables+0x7bf/0xaf0 mm/memory.c:402
 exit_mmap+0x444/0xb50 mm/mmap.c:1295
 __mmput+0x118/0x410 kernel/fork.c:1121
 exit_mm+0x1da/0x2c0 kernel/exit.c:581
 do_exit+0x648/0x22e0 kernel/exit.c:952
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1105
 __do_sys_exit_group kernel/exit.c:1116 [inline]
 __se_sys_exit_group kernel/exit.c:1114 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1114
 x64_sys_call+0x21ba/0x21c0 arch/x86/include/generated/asm/syscalls_64.h:232
 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: 0033:0x7f777d0e56c5
Code: Unable to access opcode bytes at 0x7f777d0e569b.
RSP: 002b:00007ffe98132e28 EFLAGS: 00000202 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f777d1e6fe8 RCX: 00007f777d0e56c5
RDX: 00000000000000e7 RSI: ffffffffffffff88 RDI: 0000000000000000
RBP: 0000000000000001 R08: 00007ffe98132db8 R09: 0000000000000000
R10: 00007ffe98132c50 R11: 0000000000000202 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f777d1e5680 R15: 00007f777d1e7000
 </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 2b 98 8b be 4b 03 00 00 48 c7 c2 40 2b 98 8b e8 54 b8 75 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 60 f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc900046176f8 EFLAGS: 00010206
RAX: 000000001fffa000 RBX: ffffffff8228abc9 RCX: 430dd21648f78b00
RDX: 0000000000000000 RSI: ffffffff8be1ba20 RDI: ffffffff8be1b9e0
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff8228abc9
R10: dffffc0000000000 R11: fffffbfff1f4167f R12: dffffc0000000000
R13: ffff8880b873b3c0 R14: 0000000000000001 R15: 00000000fffd0000
FS:  0000000000000000(0000) GS:ffff888125d57000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f777cf86e9c CR3: 000000000df38000 CR4: 00000000003526f0
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	48 c7 c7 00 2b 98 8b 	mov    $0xffffffff8b982b00,%rdi
   7:	be 4b 03 00 00       	mov    $0x34b,%esi
   c:	48 c7 c2 40 2b 98 8b 	mov    $0xffffffff8b982b40,%rdx
  13:	e8 54 b8 75 ff       	call   0xff75b86c
  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 b4 60 f7 ff       	call   0xfff760ec
  38:	49 8b 07             	mov    (%r15),%rax
  3b:	a8 03                	test   $0x3,%al
  3d:	75 62                	jne    0xa1