loop4: detected capacity change from 0 to 32768
(syz.4.584,8557,1):ocfs2_read_blocks:240 ERROR: status = -12
Unable to handle kernel paging request at virtual address dfff800000000003
KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f]
Mem abort info:
  ESR = 0x0000000096000005
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x05: level 1 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000
  CM = 0, WnR = 0, TnD = 0, TagAccess = 0
  GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[dfff800000000003] address between user and kernel address ranges
Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 UID: 0 PID: 8557 Comm: syz.4.584 Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : ocfs2_buffer_cached+0xc0/0x924 fs/ocfs2/uptodate.c:237
lr : ocfs2_metadata_cache_owner fs/ocfs2/uptodate.c:60 [inline]
lr : ocfs2_buffer_cached+0xb4/0x924 fs/ocfs2/uptodate.c:236
sp : ffff80009dea6240
x29: ffff80009dea6260 x28: ffff700013bd4c60 x27: ffff80009dea6900
x26: 1fffe0001d6d42ce x25: dfff800000000000 x24: 0000000000000003
x23: 0000000000000000 x22: 0000000000000042 x21: ffff80008b88e640
x20: 0000000000000018 x19: ffff0000eb6a1670 x18: ffff80009dea5f00
x17: 000000000001463c x16: ffff8000803600cc x15: ffff700013bd4c2c
x14: 1ffff00013bd4c2c x13: 0000000000000004 x12: ffffffffffffffff
x11: 0000000000040000 x10: 000000000001e4d6 x9 : 1fffe0001d6d41c8
x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000
x5 : ffff8000932481f8 x4 : 0000000000000008 x3 : ffff8000803601f4
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000042
Call trace:
 ocfs2_buffer_cached+0xc0/0x924 fs/ocfs2/uptodate.c:237
 ocfs2_set_buffer_uptodate+0xb4/0x11e8 fs/ocfs2/uptodate.c:474
 ocfs2_read_blocks+0xf24/0x1638 fs/ocfs2/buffer_head_io.c:392
 ocfs2_read_virt_blocks+0x3f8/0x980 fs/ocfs2/extent_map.c:1010
 ocfs2_read_dir_block fs/ocfs2/dir.c:508 [inline]
 ocfs2_find_entry_el fs/ocfs2/dir.c:715 [inline]
 ocfs2_find_entry+0x398/0x247c fs/ocfs2/dir.c:1080
 ocfs2_find_files_on_disk+0x11c/0x3e8 fs/ocfs2/dir.c:1980
 ocfs2_lookup_ino_from_name+0xb8/0x1d4 fs/ocfs2/dir.c:2002
 _ocfs2_get_system_file_inode fs/ocfs2/sysfile.c:136 [inline]
 ocfs2_get_system_file_inode+0x2e0/0x6d8 fs/ocfs2/sysfile.c:112
 ocfs2_init_global_system_inodes+0x2bc/0x618 fs/ocfs2/super.c:457
 ocfs2_initialize_super fs/ocfs2/super.c:2250 [inline]
 ocfs2_fill_super+0x2590/0x4740 fs/ocfs2/super.c:994
 mount_bdev+0x1d4/0x2a0 fs/super.c:1679
 ocfs2_mount+0x44/0x58 fs/ocfs2/super.c:1188
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662
 vfs_get_tree+0x90/0x28c fs/super.c:1800
 do_new_mount+0x278/0x900 fs/namespace.c:3472
 path_mount+0x590/0xe04 fs/namespace.c:3799
 do_mount fs/namespace.c:3812 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount fs/namespace.c:3997 [inline]
 __arm64_sys_mount+0x45c/0x5a8 fs/namespace.c:3997
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598
Code: d63f0100 91006294 aa0003f6 d343fe98 (38796b08) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	d63f0100 	blr	x8
   4:	91006294 	add	x20, x20, #0x18
   8:	aa0003f6 	mov	x22, x0
   c:	d343fe98 	lsr	x24, x20, #3
* 10:	38796b08 	ldrb	w8, [x24, x25] <-- trapping instruction