syzbot

Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4283 Comm: syz.1.18 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : fat_dir_ioctl+0x1d8/0x36c fs/fat/dir.c:812
lr : fat_dir_ioctl+0x1b4/0x36c fs/fat/dir.c:812
sp : ffff800020227c00
x29: ffff800020227cd0 x28: 0000000000000010 x27: dfff800000000000
x26: ffff700004044f84 x25: 00000000fffffff2 x24: 0000000000000000
x23: 0000000000001000 x22: 0000000000000000 x21: ffff800020227c40
x20: ffff0000f11c8db0 x19: ffff0000d1903680 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800008e37390 x15: 0000000082307202
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000010 x9 : 0000ffffffffffff
x8 : 0000000000000010 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 fat_dir_ioctl+0x1d8/0x36c fs/fat/dir.c:812
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl fs/ioctl.c:860 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:860
 __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: d503229f 2a1f03f9 2a1f03e0 78000959 (2a1903e1) 
---[ end trace 3b767c1a27e564ea ]---
----------------
Code disassembly (best guess):
   0:	d503229f 	csdb
   4:	2a1f03f9 	mov	w25, wzr
   8:	2a1f03e0 	mov	w0, wzr
   c:	78000959 	sttrh	w25, [x10]
* 10:	2a1903e1 	mov	w1, w25 <-- trapping instruction