BUG: unable to handle page fault for address: ffffebde00000008
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0 
Oops: 0000 [#1] PREEMPT SMP
CPU: 1 PID: 141 Comm: kworker/1:2 Not tainted 5.19.0-syzkaller-14374-g5d6a0f4da927 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events cache_reap
RIP: 0010:_compound_head include/linux/page-flags.h:253 [inline]
RIP: 0010:virt_to_folio include/linux/mm.h:858 [inline]
RIP: 0010:virt_to_slab mm/slab.h:175 [inline]
RIP: 0010:free_block+0xc0/0x290 mm/slab.c:3317
Code: 01 e5 0f 82 de 01 00 00 48 b8 00 00 00 80 7f 77 00 00 49 01 c5 48 b8 00 00 00 00 00 ea ff ff 49 c1 ed 0c 49 c1 e5 06 49 01 c5 <49> 8b 45 08 a8 01 0f 85 a7 01 00 00 0f 1f 44 00 00 49 8b 45 00 f6
RSP: 0000:ffffc90001f0fd78 EFLAGS: 00010086
RAX: ffffea0000000000 RBX: ffffe8ffffd21211 RCX: 0000000000000000
RDX: 0000000005666667 RSI: ffffe8ffffd21211 RDI: ffff888105493000
RBP: ffff888105493000 R08: ffffc90001f0fdf0 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000800 R12: 0000000000000000
R13: ffffebde00000000 R14: 0000000000000000 R15: ffff8881057d3b00
FS:  0000000000000000(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffebde00000008 CR3: 0000000005a29000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 drain_array_locked+0x30/0x80 mm/slab.c:2130
 drain_array+0x80/0xa0 mm/slab.c:3958
 cache_reap+0xda/0x290 mm/slab.c:3999
 process_one_work+0x2ba/0x5f0 kernel/workqueue.c:2289
 worker_thread+0x59/0x5b0 kernel/workqueue.c:2436
 kthread+0x125/0x160 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Modules linked in:
CR2: ffffebde00000008
---[ end trace 0000000000000000 ]---
RIP: 0010:_compound_head include/linux/page-flags.h:253 [inline]
RIP: 0010:virt_to_folio include/linux/mm.h:858 [inline]
RIP: 0010:virt_to_slab mm/slab.h:175 [inline]
RIP: 0010:free_block+0xc0/0x290 mm/slab.c:3317
Code: 01 e5 0f 82 de 01 00 00 48 b8 00 00 00 80 7f 77 00 00 49 01 c5 48 b8 00 00 00 00 00 ea ff ff 49 c1 ed 0c 49 c1 e5 06 49 01 c5 <49> 8b 45 08 a8 01 0f 85 a7 01 00 00 0f 1f 44 00 00 49 8b 45 00 f6
RSP: 0000:ffffc90001f0fd78 EFLAGS: 00010086

RAX: ffffea0000000000 RBX: ffffe8ffffd21211 RCX: 0000000000000000
RDX: 0000000005666667 RSI: ffffe8ffffd21211 RDI: ffff888105493000
RBP: ffff888105493000 R08: ffffc90001f0fdf0 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000800 R12: 0000000000000000
R13: ffffebde00000000 R14: 0000000000000000 R15: ffff8881057d3b00
FS:  0000000000000000(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffebde00000008 CR3: 0000000005a29000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	01 e5                	add    %esp,%ebp
   2:	0f 82 de 01 00 00    	jb     0x1e6
   8:	48 b8 00 00 00 80 7f 	movabs $0x777f80000000,%rax
   f:	77 00 00
  12:	49 01 c5             	add    %rax,%r13
  15:	48 b8 00 00 00 00 00 	movabs $0xffffea0000000000,%rax
  1c:	ea ff ff
  1f:	49 c1 ed 0c          	shr    $0xc,%r13
  23:	49 c1 e5 06          	shl    $0x6,%r13
  27:	49 01 c5             	add    %rax,%r13
* 2a:	49 8b 45 08          	mov    0x8(%r13),%rax <-- trapping instruction
  2e:	a8 01                	test   $0x1,%al
  30:	0f 85 a7 01 00 00    	jne    0x1dd
  36:	0f 1f 44 00 00       	nopl   0x0(%rax,%rax,1)
  3b:	49 8b 45 00          	mov    0x0(%r13),%rax
  3f:	f6                   	.byte 0xf6