REISERFS (device loop9): Using tea hash to sort names
REISERFS (device loop9): Created .reiserfs_priv - reserved for xattr storage.
REISERFS warning (device loop9): vs-13060 reiserfs_update_sd_size: stat data of object [2 5 0x0 SD] (nlink == 1) not found (pos 2)
Unable to handle kernel paging request at virtual address dfff800000000001
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff800000000001] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 6096 Comm: syz.9.271 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : reiserfs_get_block+0xff8/0x3524 fs/reiserfs/inode.c:1052
lr : reiserfs_get_block+0xfc4/0x3524 fs/reiserfs/inode.c:1047
sp : ffff800020fb7080
x29: ffff800020fb75a0 x28: 00000000000003f4 x27: 1fffe0001eb1d387
x26: ffff0000df738000 x25: 0000000000000010 x24: 000000000000000c
x23: ffff0000cc6b5900 x22: 0000000000000217 x21: dfff800000000000
x20: 0000000000000000 x19: ffff0000f58e9c38 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082e743c x15: 0000000000000002
x14: 00000000fffffffd x13: 0000000000ff0100 x12: 0000000000ff0100
x11: ff00800008c74b10 x10: 0000000000000002 x9 : ffff0000c6f6d340
x8 : 0000000000000001 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000000 x1 : 00000000000003f4 x0 : 0000000000000000
Call trace:
 reiserfs_get_block+0xff8/0x3524 fs/reiserfs/inode.c:1052
 __block_write_begin_int+0x34c/0x13b8 fs/buffer.c:1991
 __block_write_begin+0x7c/0xa0 fs/buffer.c:2041
 reiserfs_write_begin+0x328/0x71c fs/reiserfs/inode.c:2775
 generic_cont_expand_simple+0x12c/0x1fc fs/buffer.c:2347
 reiserfs_setattr+0x564/0xf7c fs/reiserfs/inode.c:3305
 notify_change+0xb0c/0xdcc fs/attr.c:499
 do_truncate+0x178/0x1f0 fs/open.c:65
 vfs_truncate+0x23c/0x2b0 fs/open.c:111
 do_sys_truncate+0xe8/0x1b0 fs/open.c:134
 __do_sys_truncate fs/open.c:146 [inline]
 __se_sys_truncate fs/open.c:144 [inline]
 __arm64_sys_truncate+0x5c/0x70 fs/open.c:144
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Code: 8b140b28 b94323f6 d1001118 d343ff08 (38f56908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	8b140b28 	add	x8, x25, x20, lsl #2
   4:	b94323f6 	ldr	w22, [sp, #800]
   8:	d1001118 	sub	x24, x8, #0x4
   c:	d343ff08 	lsr	x8, x24, #3
* 10:	38f56908 	ldrsb	w8, [x8, x21] <-- trapping instruction