REISERFS (device loop4): Remounting filesystem read-only
Unable to handle kernel paging request at virtual address dfff800000000005
KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]
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
[dfff800000000005] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 25968 Comm: syz-executor.4 Not tainted 6.7.0-rc8-syzkaller-g0802e17d9aca #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : reiserfs_node_data fs/reiserfs/reiserfs.h:2183 [inline]
pc : item_head fs/reiserfs/reiserfs.h:2199 [inline]
pc : tp_item_head fs/reiserfs/reiserfs.h:2225 [inline]
pc : direct2indirect+0x6c4/0x10f8 fs/reiserfs/tail_conversion.c:119
lr : tp_item_head fs/reiserfs/reiserfs.h:2225 [inline]
lr : direct2indirect+0x684/0x10f8 fs/reiserfs/tail_conversion.c:119
sp : ffff8000980f6de0
x29: ffff8000980f6f20 x28: 0000000000000000 x27: 0000000000000028
x26: ffff00012b6650f8 x25: ffff8000980f6e60 x24: ffff8000980f7418
x23: dfff800000000000 x22: 0000000100000fff x21: ffff8000980f7410
x20: ffff8000980f7430 x19: 0000000000000000 x18: 1fffe0003682a5ce
x17: ffff80008e4ed000 x16: ffff80008a830eb8 x15: 0000000000000001
x14: 0000000000000002 x13: 00000000fffffffe x12: ffff0000c6fb9e00
x11: 0000000000040000 x10: 000000000000b164 x9 : ffff80009f79f000
x8 : 0000000000000005 x7 : ffff80008028f8d0 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800080bb087c
x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000008
Call trace:
 reiserfs_node_data fs/reiserfs/reiserfs.h:2183 [inline]
 item_head fs/reiserfs/reiserfs.h:2199 [inline]
 tp_item_head fs/reiserfs/reiserfs.h:2225 [inline]
 direct2indirect+0x6c4/0x10f8 fs/reiserfs/tail_conversion.c:119
 reiserfs_get_block+0x40c4/0x45d8 fs/reiserfs/inode.c:949
 __block_write_begin_int+0x3f0/0x1504 fs/buffer.c:2119
 __block_write_begin+0x7c/0xa0 fs/buffer.c:2168
 reiserfs_write_begin+0x328/0x71c fs/reiserfs/inode.c:2767
 generic_perform_write+0x28c/0x588 mm/filemap.c:3927
 __generic_file_write_iter+0xfc/0x204 mm/filemap.c:4022
 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4048
 call_write_iter include/linux/fs.h:2020 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x610/0x910 fs/read_write.c:584
 ksys_write+0x15c/0x26c fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155
 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595
Code: 350011e8 9100a27b b9800293 d343ff68 (38776908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	350011e8 	cbnz	w8, 0x23c
   4:	9100a27b 	add	x27, x19, #0x28
   8:	b9800293 	ldrsw	x19, [x20]
   c:	d343ff68 	lsr	x8, x27, #3
* 10:	38776908 	ldrb	w8, [x8, x23] <-- trapping instruction