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: 1 PID: 4513 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 82400005 (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 : ffff800020d17120
x29: ffff800020d17640 x28: 00000000000003f4 x27: 1fffe0001d2e32b3
x26: ffff0000e0351bc8 x25: 0000000000000010 x24: 000000000000000c
x23: ffff0000cb26be00 x22: 0000000000000217 x21: dfff800000000000
x20: 0000000000000000 x19: ffff0000e9719598 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000082e7b1c x15: 0000000000000000
x14: 00000000fffffffd x13: 0000000000ff0100 x12: 0000000000ff0100
x11: ff00800008c762c8 x10: 0000000000000000 x9 : ffff0000d96cb780
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_perform_write+0x230/0x4b0 mm/filemap.c:3846
__generic_file_write_iter+0x168/0x37c mm/filemap.c:3974
generic_file_write_iter+0xb4/0x2b0 mm/filemap.c:4006
call_write_iter include/linux/fs.h:2265 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x5ac/0x7c4 fs/read_write.c:584
ksys_write+0x120/0x210 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+0x98/0x2bc 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