syzbot

loop0: detected capacity change from 0 to 256
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4247 Comm: syz.0.17 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 : do_sys_name_to_handle fs/fhandle.c:72 [inline]
pc : __do_sys_name_to_handle_at fs/fhandle.c:109 [inline]
pc : __se_sys_name_to_handle_at fs/fhandle.c:93 [inline]
pc : __arm64_sys_name_to_handle_at+0x4d0/0x678 fs/fhandle.c:93
lr : do_sys_name_to_handle fs/fhandle.c:72 [inline]
lr : __do_sys_name_to_handle_at fs/fhandle.c:109 [inline]
lr : __se_sys_name_to_handle_at fs/fhandle.c:93 [inline]
lr : __arm64_sys_name_to_handle_at+0x494/0x678 fs/fhandle.c:93
sp : ffff80001ffe7c60
x29: ffff80001ffe7d20 x28: dfff800000000000 x27: ffff80001ffe7c80
x26: ffff700003ffcf90 x25: 0000000000000000 x24: 0000000000000008
x23: 00000000ffffffb5 x22: 0000000000400140 x21: 00000000fffffff2
x20: 0000000000000000 x19: 00000000200000c0 x18: 0000000000000000
x17: ffff8000111b85b8 x16: ffff800008a81a80 x15: ffff80000805b008
x14: ffff80000805b234 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : 0000ffffffffffff
x8 : 0000000000000032 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 do_sys_name_to_handle fs/fhandle.c:72 [inline]
 __do_sys_name_to_handle_at fs/fhandle.c:109 [inline]
 __se_sys_name_to_handle_at fs/fhandle.c:93 [inline]
 __arm64_sys_name_to_handle_at+0x4d0/0x678 fs/fhandle.c:93
 __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: b94002a8 2a1f03f5 2a1f03e0 b8000a88 (2a1503e1) 
---[ end trace 6317c5b2db66b6bc ]---
----------------
Code disassembly (best guess):
   0:	b94002a8 	ldr	w8, [x21]
   4:	2a1f03f5 	mov	w21, wzr
   8:	2a1f03e0 	mov	w0, wzr
   c:	b8000a88 	sttr	w8, [x20]
* 10:	2a1503e1 	mov	w1, w21 <-- trapping instruction