BUG: unable to handle kernel paging request in rcu_cblist

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
android-5-10	KASAN: use-after-free Read in rcu_cblist_dequeue				1	1305d	1299d	0/2	auto-closed as invalid on 2022/02/24 12:16
Unable to handle kernel paging request at virtual address ffef801407ee7000
KASAN: maybe wild-memory-access in range [0xff8000a03f738000-0xff8000a03f738007]
Mem abort info:
  ESR = 0x0000000096000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[ffef801407ee7000] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1]  SMP
Modules linked in:
CPU: 0 UID: 0 PID: 11 Comm: kworker/0:1 Not tainted 6.15.0-rc6-syzkaller-ga82e92598ab1 #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: rcu_gp srcu_invoke_callbacks
pstate: 00400005 (nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : rcu_cblist_dequeue+0x68/0xc8 kernel/rcu/rcu_segcblist.c:75
lr : srcu_invoke_callbacks+0x198/0x394 kernel/rcu/srcutree.c:1800
sp : ffff800097647960
x29: ffff800097647960 x28: ffff8000976479c0 x27: dfff800000000000
x26: 0000000000000000 x25: ffff0000c1a1a918 x24: fffffdffbf6ee5c0
x23: 1ffff00012ec8f3c x22: dfff800000000000 x21: ffff8000976479f0
x20: ff8000a03f738000 x19: ffff8000976479e0 x18: 1fffe0003386aa76
x17: ffff80008f31e000 x16: ffff80008051c2cc x15: 0000000000000001
x14: 1fffffbff7eddcb8 x13: 0000000000000000 x12: 0000000000000000
x11: ffff800092d35c40 x10: 0000000000000001 x9 : 1ff0001407ee7000
x8 : 0000000000000000 x7 : ffff8000805a49dc x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : 0000000000000010
x2 : 0000000000000006 x1 : ffff80008e9036c1 x0 : ffff8000976479e0
Call trace:
 rcu_cblist_dequeue+0x68/0xc8 kernel/rcu/rcu_segcblist.c:74 (P)
 srcu_invoke_callbacks+0x198/0x394 kernel/rcu/srcutree.c:1800
 process_one_work+0x7e8/0x156c kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x958/0xed8 kernel/workqueue.c:3400
 kthread+0x5fc/0x75c kernel/kthread.c:464
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:847
Code: f94002a8 d343fe89 d1000508 f90002a8 (38766928) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	f94002a8 	ldr	x8, [x21]
   4:	d343fe89 	lsr	x9, x20, #3
   8:	d1000508 	sub	x8, x8, #0x1
   c:	f90002a8 	str	x8, [x21]
* 10:	38766928 	ldrb	w8, [x9, x22] <-- trapping instruction