syzbot

Unable to handle kernel paging request at virtual address dfff800000000005
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
[dfff800000000005] address between user and kernel address ranges
Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4253 Comm: syz.0.44 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : udf_fiiter_write_fi+0x178/0xb54 fs/udf/directory.c:406
lr : udf_fiiter_write_fi+0xd8/0xb54 fs/udf/directory.c:402
sp : ffff80001fee74d0
x29: ffff80001fee7540 x28: ffff0000e2ea82f0 x27: ffff80001fee76f0
x26: dfff800000000000 x25: 1ffff00003fdcf12 x24: 0000000000000200
x23: 0000000000000000 x22: ffff0000edc59af8 x21: 0000000000000001
x20: 0000000000000028 x19: ffff80001fee7890 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000111bc798 x15: 000000003b9aca00
x14: 0000000000ff0100 x13: 0000000030e03500 x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : ffff0000da919b40
x8 : 0000000000000005 x7 : 0000000030e03500 x6 : 0000000000000040
x5 : ffff0000edc59518 x4 : ffff0000edc59508 x3 : ffff800009741288
x2 : 0000000000000010 x1 : 0000000000000001 x0 : 0000000000000003
Call trace:
 udf_fiiter_write_fi+0x178/0xb54 fs/udf/directory.c:406
 udf_rename+0x960/0xa10 fs/udf/namei.c:860
 vfs_rename+0x954/0xdcc fs/namei.c:4832
 do_renameat2+0x74c/0xcdc fs/namei.c:4985
 __do_sys_renameat2 fs/namei.c:5018 [inline]
 __se_sys_renameat2 fs/namei.c:5015 [inline]
 __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5015
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
Code: 97c39d27 f9400288 9100a114 d343fe88 (387a6908) 
---[ end trace 8c8e161c9b786d88 ]---
----------------
Code disassembly (best guess):
   0:	97c39d27 	bl	0xffffffffff0e749c
   4:	f9400288 	ldr	x8, [x20]
   8:	9100a114 	add	x20, x8, #0x28
   c:	d343fe88 	lsr	x8, x20, #3
* 10:	387a6908 	ldrb	w8, [x8, x26] <-- trapping instruction