syzbot

Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4314 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 : userfaultfd_zeropage fs/userfaultfd.c:1781 [inline]
pc : userfaultfd_ioctl+0x2304/0x46a0 fs/userfaultfd.c:2004
lr : userfaultfd_zeropage fs/userfaultfd.c:1781 [inline]
lr : userfaultfd_ioctl+0x22e0/0x46a0 fs/userfaultfd.c:2004
sp : ffff80001f467900
x29: ffff80001f467cd0 x28: fffffffffffffffe x27: ffff700003e8cf34
x26: ffff0000d4fad1e4 x25: dfff800000000000 x24: ffff0000c2270190
x23: ffff0000d4fad1c0 x22: 0000002000001800 x21: 0000000020000018
x20: 00000000fffffff2 x19: ffff0000c2270000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800008a0f38c x15: 0000000020000000
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000020000018 x9 : 0000ffffffffffff
x8 : 0000000020000018 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 userfaultfd_zeropage fs/userfaultfd.c:1781 [inline]
 userfaultfd_ioctl+0x2304/0x46a0 fs/userfaultfd.c:2004
 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 2a1f03f4 2a1f03e0 f800095c (2a1403e1) 
---[ end trace a6632da20f681f6f ]---
----------------
Code disassembly (best guess):
   0:	d503229f 	csdb
   4:	2a1f03f4 	mov	w20, wzr
   8:	2a1f03e0 	mov	w0, wzr
   c:	f800095c 	sttr	x28, [x10]
* 10:	2a1403e1 	mov	w1, w20 <-- trapping instruction