syzbot

loop0: detected capacity change from 0 to 32768
JBD2: Ignoring recovery information on journal
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
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: 4290 Comm: syz-executor411 Not tainted 6.1.118-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ocfs2_find_dir_space_id fs/ocfs2/dir.c:3408 [inline]
pc : ocfs2_prepare_dir_for_insert+0x2d10/0x5204 fs/ocfs2/dir.c:4288
lr : ocfs2_find_dir_space_id fs/ocfs2/dir.c:3371 [inline]
lr : ocfs2_prepare_dir_for_insert+0x24e0/0x5204 fs/ocfs2/dir.c:4288
sp : ffff8000210365a0
x29: ffff800021036e40 x28: ffff800021036ea0 x27: ffff0000e4823338
x26: ffff700004206cf0 x25: 1ffff00004206db0 x24: dfff800000000000
x23: ffff800021036d80 x22: 000000000000001c x21: 00000001000001c0
x20: 0000000000000009 x19: 0000000000000000 x18: ffff800021036580
x17: ffff800018aab000 x16: ffff8000121e3a40 x15: 0000000000000000
x14: 0000000000000002 x13: ffff0000d9b88000 x12: 0000000000ff0100
x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff800009e90d08
x8 : 0000000000000001 x7 : 0000000000000000 x6 : ffff800021036da0
x5 : ffff8000210374a0 x4 : 0000000000000000 x3 : 0000000000000020
x2 : 0000000000000000 x1 : 0000000000000400 x0 : 0000000000000008
Call trace:
 ocfs2_find_dir_space_id fs/ocfs2/dir.c:3408 [inline]
 ocfs2_prepare_dir_for_insert+0x2d10/0x5204 fs/ocfs2/dir.c:4288
 __ocfs2_prepare_orphan_dir+0x14c/0x300 fs/ocfs2/namei.c:2162
 ocfs2_prepare_orphan_dir+0x178/0x460 fs/ocfs2/namei.c:2205
 ocfs2_rename+0x20ec/0x3588 fs/ocfs2/namei.c:1457
 vfs_rename+0xac8/0xe04 fs/namei.c:4874
 do_renameat2+0x9ec/0xe64 fs/namei.c:5027
 __do_sys_renameat2 fs/namei.c:5060 [inline]
 __se_sys_renameat2 fs/namei.c:5057 [inline]
 __arm64_sys_renameat2+0xe0/0xfc fs/namei.c:5057
 __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+0x58/0x168 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: cb150295 d343fc08 91002674 f9409bfa (38f86908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	cb150295 	sub	x21, x20, x21
   4:	d343fc08 	lsr	x8, x0, #3
   8:	91002674 	add	x20, x19, #0x9
   c:	f9409bfa 	ldr	x26, [sp, #304]
* 10:	38f86908 	ldrsb	w8, [x8, x24] <-- trapping instruction