loop4: detected capacity change from 0 to 256
Unable to handle kernel paging request at virtual address fbd52000000000bd
KASAN: maybe wild-memory-access in range [0xdead0000000005e8-0xdead0000000005ef]
Mem abort info:
  ESR = 0x0000000096000004
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x04: level 0 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000004
  CM = 0, WnR = 0
[fbd52000000000bd] address between user and kernel address ranges
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 6229 Comm: syz.4.718 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
pstate: 824000c5 (Nzcv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--)
pc : __lock_acquire+0xe0/0x6544 kernel/locking/lockdep.c:4919
lr : lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
sp : ffff800021e775c0
x29: ffff800021e777c0 x28: dfff800000000000 x27: 0000000000000000
x26: ffff800008a805e8 x25: 1ffff00002a180b0 x24: 0000000000000000
x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000
x20: dead0000000005e8 x19: 0000000000000000 x18: ffff800011abbcc0
x17: ffff8000181f9000 x16: ffff800008042d90 x15: ffff80000898cbfc
x14: 000000001195d0cc x13: 1ffff00002a180b1 x12: 0000000000080000
x11: 0000000000004c5d x10: ffff7000043ceed8 x9 : ffff8000150c0584
x8 : 1bd5a000000000bd x7 : ffff800008a805e8 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000
x2 : 0000000000000000 x1 : 0000000000000000 x0 : dead0000000005e8
Call trace:
 __lock_acquire+0xe0/0x6544 kernel/locking/lockdep.c:4919
 lock_acquire+0x20c/0x644 kernel/locking/lockdep.c:5662
 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
 _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:351 [inline]
 create_empty_buffers+0xe4/0x5c0 fs/buffer.c:1552
 block_truncate_page+0x174/0x784 fs/buffer.c:2554
 fat_block_truncate_page+0x50/0x60 fs/fat/inode.c:341
 fat_setattr+0x9cc/0xe84 fs/fat/file.c:546
 notify_change+0xb0c/0xdcc fs/attr.c:499
 do_truncate+0x178/0x1f0 fs/open.c:65
 vfs_truncate+0x23c/0x2b0 fs/open.c:111
 do_sys_truncate+0xe8/0x1b0 fs/open.c:134
 __do_sys_truncate fs/open.c:146 [inline]
 __se_sys_truncate fs/open.c:144 [inline]
 __arm64_sys_truncate+0x5c/0x70 fs/open.c:144
 __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: b0067488 b9482108 340001c8 d343fe88 (387c6908) 
---[ end trace 0000000000000000 ]---
----------------
Code disassembly (best guess):
   0:	b0067488 	adrp	x8, 0xce91000
   4:	b9482108 	ldr	w8, [x8, #2080]
   8:	340001c8 	cbz	w8, 0x40
   c:	d343fe88 	lsr	x8, x20, #3
* 10:	387c6908 	ldrb	w8, [x8, x28] <-- trapping instruction