Unable to handle kernel paging request at virtual address dfff800000000000
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000000] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 5977 Comm: syz-executor140 Not tainted 6.4.0-rc7-syzkaller-ge40939bbfc68 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline]
pc : set_buffer_uptodate include/linux/buffer_head.h:151 [inline]
pc : do_journal_end+0x10cc/0x3c6c fs/reiserfs/journal.c:4079
lr : __getblk include/linux/buffer_head.h:420 [inline]
lr : do_journal_end+0x10c4/0x3c6c fs/reiserfs/journal.c:4076
sp : ffff800096987460
x29: ffff800096987670 x28: ffff800096987758 x27: ffff0000c8a04678
x26: ffff0000c8a04678 x25: ffff800096987748 x24: ffff0000c8a04018
x23: ffff800096ad9040 x22: ffff0000c8a04000 x21: 0000000000000000
x20: ffff0000c1494200 x19: dfff800000000000 x18: ffff800096986a20
x17: ffff80008deed000 x16: ffff80008026c60c x15: ffff800080afe87c
x14: 1ffff00011bde0ac x13: dfff800000000000 x12: 0000000000000001
x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800080b5dc9c
x2 : 0000000000000001 x1 : 0000000000000003 x0 : 0000000000000000
Call trace:
 __getblk include/linux/buffer_head.h:420 [inline]
 do_journal_end+0x10cc/0x3c6c fs/reiserfs/journal.c:4076
 journal_end_sync+0x164/0x1d0 fs/reiserfs/journal.c:3535
 reiserfs_sync_fs+0xd4/0x150 fs/reiserfs/super.c:78
 sync_filesystem+0xe8/0x218 fs/sync.c:56
 generic_shutdown_super+0x70/0x328 fs/super.c:473
 kill_block_super+0x70/0xdc fs/super.c:1407
 reiserfs_kill_sb+0x134/0x14c fs/reiserfs/super.c:570
 deactivate_locked_super+0xac/0x124 fs/super.c:331
 deactivate_super+0xe0/0x100 fs/super.c:362
 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177
 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184
 task_work_run+0x230/0x2e0 kernel/task_work.c:179
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1305
 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline]
 el0_svc+0x94/0x160 arch/arm64/kernel/entry-common.c:648
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591
Code: 52800103 97f5c6c1 d343fc08 aa0003f5 (38736908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	52800103 	mov	w3, #0x8                   	// #8
   4:	97f5c6c1 	bl	0xffffffffffd71b08
   8:	d343fc08 	lsr	x8, x0, #3
   c:	aa0003f5 	mov	x21, x0
* 10:	38736908 	ldrb	w8, [x8, x19] <-- trapping instruction