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: 5816 Comm: syz-executor Not tainted 6.16.0-syzkaller-06600-g1dbf1d590d10 #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 40 51 98 8b be 4b 03 00 00 48 c7 c2 80 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:ffffc900034cfa40 EFLAGS: 00010006
RAX: 000000001fffe000 RBX: ffffffff822b7619 RCX: 50badd4c5cf96500
RDX: 0000000000000000 RSI: ffffffff8be309e0 RDI: ffffffff8be309a0
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822b7619
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: dffffc0000000000
R13: ffff88813663b500 R14: 0000000000000001 R15: 00000000ffff0000
FS:  0000555562e19500(0000) GS:ffff8881a3c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7bdb8e7d60 CR3: 000000011d7fa000 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+0x1a2/0x370
 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: 0033:0x7f7bdabc1425
Code: 24 0c 89 3c 24 48 89 4c 24 18 e8 f6 54 ff ff 4c 8b 54 24 18 48 8b 54 24 10 41 89 c0 8b 74 24 0c 8b 3c 24 b8 e6 00 00 00 0f 05 <44> 89 c7 48 89 04 24 e8 4f 55 ff ff 48 8b 04 24 48 83 c4 28 f7 d8
RSP: 002b:00007ffd236e09b0 EFLAGS: 00000293 ORIG_RAX: 00000000000000e6
RAX: fffffffffffffdfc RBX: 0000000000001272 RCX: 00007f7bdabc1425
RDX: 00007ffd236e09f0 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffd236e0a5c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000001388
R13: 00000000000927c0 R14: 00000000000a94f8 R15: 00007ffd236e0ab0
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:percpu_ref_get_many+0x8d/0x140
Code: 01 48 c7 c7 40 51 98 8b be 4b 03 00 00 48 c7 c2 80 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:ffffc900034cfa40 EFLAGS: 00010006
RAX: 000000001fffe000 RBX: ffffffff822b7619 RCX: 50badd4c5cf96500
RDX: 0000000000000000 RSI: ffffffff8be309e0 RDI: ffffffff8be309a0
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822b7619
R10: dffffc0000000000 R11: fffffbfff1f40f7f R12: dffffc0000000000
R13: ffff88813663b500 R14: 0000000000000001 R15: 00000000ffff0000
FS:  0000555562e19500(0000) GS:ffff8881a3c80000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7bdb8e7d60 CR3: 000000011d7fa000 CR4: 00000000000006f0
