syzbot

BTRFS info (device loop0): turning on async discard
BTRFS info (device loop0): using free space tree
BTRFS info (device loop0): has skinny extents
BTRFS info (device loop0): enabling ssd optimizations
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4229 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 : get_futex_value_locked kernel/futex/core.c:793 [inline]
pc : futex_lock_pi_atomic+0x170/0xea4 kernel/futex/core.c:1429
lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:244 [inline]
lr : get_futex_value_locked kernel/futex/core.c:790 [inline]
lr : futex_lock_pi_atomic+0x14c/0xea4 kernel/futex/core.c:1429
sp : ffff80001f897540
x29: ffff80001f8975c0 x28: ffff0000d51a1b40 x27: ffff80001f8977d0
x26: 1fffe0001aa34611 x25: ffff0000d51a3088 x24: 00000000fffffff2
x23: ffff80001f8977b8 x22: 0000000000000000 x21: dfff800000000000
x20: 0000000000000000 x19: ffff0000c0d33180 x18: 0000000000000000
x17: ffff80000805b008 x16: ffff8000083c981c x15: ffff80000805b444
x14: ffff8000083c4470 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000001 x10: 0000000000000000 x9 : 0000ffffffffffff
x8 : 0000000000000000 x7 : ffff80000820263c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 get_futex_value_locked kernel/futex/core.c:790 [inline]
 futex_lock_pi_atomic+0x170/0xea4 kernel/futex/core.c:1429
 futex_lock_pi+0x2d0/0x860 kernel/futex/core.c:3054
 do_futex+0xb00/0x257c kernel/futex/core.c:-1
 __do_sys_futex kernel/futex/core.c:4059 [inline]
 __se_sys_futex kernel/futex/core.c:4040 [inline]
 __arm64_sys_futex+0x388/0x400 kernel/futex/core.c:4040
 __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: ea29011f 9a9f02ca d503229f b8400948 (2a1803e1) 
---[ end trace e0bbd3d01805c4b4 ]---
----------------
Code disassembly (best guess):
   0:	ea29011f 	bics	xzr, x8, x9
   4:	9a9f02ca 	csel	x10, x22, xzr, eq	// eq = none
   8:	d503229f 	csdb
   c:	b8400948 	ldtr	w8, [x10]
* 10:	2a1803e1 	mov	w1, w24 <-- trapping instruction