syzbot

Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4260 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 : ns_ioctl+0x41c/0x504 fs/nsfs.c:211
lr : sign_extend64 include/linux/bitops.h:183 [inline]
lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:244 [inline]
lr : ns_ioctl+0x400/0x504 fs/nsfs.c:211
sp : ffff800021757c80
x29: ffff800021757ce0 x28: ffff0000d7e09b40 x27: 0000000000000003
x26: 1fffe0001afc1368 x25: 0000000000400040 x24: 1ffff000042eaf90
x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000001
x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000000
x17: 0000000000000000 x16: ffff8000089b5828 x15: 000000000000b704
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000000000000000
x8 : 00000000fffffff2 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 ns_ioctl+0x41c/0x504 fs/nsfs.c:211
 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: ea2a013f 9a9f026b d503229f b8000974 (93407d00) 
---[ end trace 98472642320493dd ]---
----------------
Code disassembly (best guess):
   0:	ea2a013f 	bics	xzr, x9, x10
   4:	9a9f026b 	csel	x11, x19, xzr, eq	// eq = none
   8:	d503229f 	csdb
   c:	b8000974 	sttr	w20, [x11]
* 10:	93407d00 	sxtw	x0, w8 <-- trapping instruction