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REISERFS (device loop0): Using tea hash to sort names
REISERFS (device loop0): Created .reiserfs_priv - reserved for xattr storage.
REISERFS warning (device loop0): 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: 0 PID: 4486 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
pstate: 82400005 (Nzcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : reiserfs_get_block+0x102c/0x36e8 fs/reiserfs/inode.c:1052
lr : reiserfs_get_block+0xff8/0x36e8 fs/reiserfs/inode.c:1047
sp : ffff800020bb7140
x29: ffff800020bb7660 x28: ffff0000e9ef9598 x27: ffff0000eb83a048
x26: 00000000000003f4 x25: 0000000000000010 x24: ffff800020bb7470
x23: 0000000000000000 x22: dfff800000000000 x21: 000000000000000c
x20: 0000000000000217 x19: ffff0000e22009f8 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082efb0c x15: 0000000000000000
x14: 0000000000000004 x13: 1ffff00004176ebc x12: 0000000000ff0100
x11: ff00800008c8d9ac x10: 0000000000000000 x9 : ffff0000d5fe9c00
x8 : 0000000000000001 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000000 x1 : 00000000000003f4 x0 : 0000000000000000
Call trace:
 reiserfs_get_block+0x102c/0x36e8 fs/reiserfs/inode.c:1052
 __block_write_begin_int+0x350/0x1388 fs/buffer.c:1991
 __block_write_begin+0x7c/0xa0 fs/buffer.c:2041
 reiserfs_write_begin+0x328/0x714 fs/reiserfs/inode.c:2775
 generic_perform_write+0x234/0x4f4 mm/filemap.c:3862
 __generic_file_write_iter+0x130/0x250 mm/filemap.c:3960
 generic_file_write_iter+0xb4/0x2b0 mm/filemap.c:3989
 call_write_iter include/linux/fs.h:2265 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x3ec/0x7f0 fs/read_write.c:584
 ksys_write+0x12c/0x224 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:38 [inline]
 invoke_syscall+0x98/0x290 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140
 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204
 el0_svc+0x58/0x128 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: 8b170b28 b94323f4 d1001115 d343fea8 (38f66908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	8b170b28 	add	x8, x25, x23, lsl #2
   4:	b94323f4 	ldr	w20, [sp, #800]
   8:	d1001115 	sub	x21, x8, #0x4
   c:	d343fea8 	lsr	x8, x21, #3
* 10:	38f66908 	ldrsb	w8, [x8, x22] <-- trapping instruction