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: 0 UID: 0 PID: 16919 Comm: syz-executor Not tainted 6.16.0-rc5-syzkaller-00159-g47c84997c686-dirty #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 c0 3f 98 8b be 4b 03 00 00 48 c7 c2 00 40 98 8b e8 d4 85 73 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:ffffc9000a2b7a40 EFLAGS: 00010006
RAX: 000000001fffe000 RBX: ffffffff822ae319 RCX: d02889ebb34c0700
RDX: 0000000000000000 RSI: ffffffff8be28c20 RDI: ffffffff8be28be0
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822ae319
R10: dffffc0000000000 R11: fffffbfff1f43abf R12: dffffc0000000000
R13: ffff88804b03b540 R14: 0000000000000001 R15: 00000000ffff0000
FS:  00005555906fd500(0000) GS:ffff8880b8626000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7481d802d8 CR3: 0000000063354000 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: 0033:0x7fc551584b97
Code: 89 7c 24 10 48 89 4c 24 18 e8 45 1b 03 00 4c 8b 54 24 18 8b 54 24 14 41 89 c0 48 8b 74 24 08 8b 7c 24 10 b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 89 44 24 10 e8 95 1b 03 00 8b 44
RSP: 002b:00007ffd72cfccb0 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000306 RCX: 00007fc551584b97
RDX: 0000000040000001 RSI: 00007ffd72cfcd1c RDI: 00000000ffffffff
RBP: 00007ffd72cfcd1c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000001388
R13: 00000000000927c0 R14: 000000000004831f R15: 00007ffd72cfcd70
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:percpu_ref_get_many+0x8d/0x140
Code: 01 48 c7 c7 c0 3f 98 8b be 4b 03 00 00 48 c7 c2 00 40 98 8b e8 d4 85 73 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:ffffc9000a2b7a40 EFLAGS: 00010006
RAX: 000000001fffe000 RBX: ffffffff822ae319 RCX: d02889ebb34c0700
RDX: 0000000000000000 RSI: ffffffff8be28c20 RDI: ffffffff8be28be0
RBP: 0000000000000078 R08: 0000000000000000 R09: ffffffff822ae319
R10: dffffc0000000000 R11: fffffbfff1f43abf R12: dffffc0000000000
R13: ffff88804b03b540 R14: 0000000000000001 R15: 00000000ffff0000
FS:  00005555906fd500(0000) GS:ffff8880b8626000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7481d802d8 CR3: 0000000063354000 CR4: 00000000000006f0
