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: 1 UID: 0 PID: 5849 Comm: syz-executor Not tainted 6.16.0-syzkaller-12063-g37816488247d #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:percpu_ref_get_many+0x8d/0x140
Code: 01 48 c7 c7 a0 4c 98 8b be 4b 03 00 00 48 c7 c2 e0 4c 98 8b e8 a4 bd 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 d4 4d f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc9000400fa40 EFLAGS: 00010006
RAX: 000000001fffc000 RBX: ffffffff822bc7f9 RCX: b90e66b2d6056d00
RDX: 0000000000000000 RSI: ffffffff8be32660 RDI: ffffffff8be32620
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822bc7f9
R10: dffffc0000000000 R11: fffffbfff1f468e7 R12: dffffc0000000000
R13: ffff88813663b540 R14: 0000000000000001 R15: 00000000fffe0000
FS:  0000555566f66500(0000) GS:ffff8881a3c21000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff9cef2f40 CR3: 0000000026866000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 refill_obj_stock+0x254/0x850
 __memcg_slab_free_hook+0x127/0x3d0
 kmem_cache_free+0x223/0x400
 __dequeue_signal+0x487/0x5b0
 dequeue_signal+0x140/0x370
 get_signal+0x55f/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f31cee4d9b0
Code: 44 24 20 0f 29 44 24 30 0f 29 44 24 40 48 8b 44 24 08 ff d0 48 83 c4 50 31 c0 5b 5d 41 5c 41 5d 41 5e c3 0f 1f 80 00 00 00 00 <c3> 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 c3 66 66 2e 0f 1f
RSP: 002b:00007fff9cef31f8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000001a59 RCX: 00007f31cefc14a5
RDX: 00007fff9cef3200 RSI: 00007fff9cef3330 RDI: 0000000000000011
RBP: 00007fff9cef36fc R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000001388
R13: 00000000000927c0 R14: 0000000000053b29 R15: 00007fff9cef3750
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:percpu_ref_get_many+0x8d/0x140
Code: 01 48 c7 c7 a0 4c 98 8b be 4b 03 00 00 48 c7 c2 e0 4c 98 8b e8 a4 bd 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 d4 4d f7 ff 49 8b 07 a8 03 75 62
RSP: 0018:ffffc9000400fa40 EFLAGS: 00010006
RAX: 000000001fffc000 RBX: ffffffff822bc7f9 RCX: b90e66b2d6056d00
RDX: 0000000000000000 RSI: ffffffff8be32660 RDI: ffffffff8be32620
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822bc7f9
R10: dffffc0000000000 R11: fffffbfff1f468e7 R12: dffffc0000000000
R13: ffff88813663b540 R14: 0000000000000001 R15: 00000000fffe0000
FS:  0000555566f66500(0000) GS:ffff8881a3c21000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff9cef2f40 CR3: 0000000026866000 CR4: 00000000000006f0
