syzbot

Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4159 Comm: syz.4.5 Not tainted 5.15.189-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 42000405 (nZcv daif -PAN -UAO +TCO -DIT -SSBS BTYPE=jc)
pc : futex_atomic_cmpxchg_inatomic arch/arm64/include/asm/futex.h:123 [inline]
pc : cmpxchg_futex_value_locked kernel/futex/core.c:779 [inline]
pc : lock_pi_update_atomic+0x158/0x254 kernel/futex/core.c:1382
lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:244 [inline]
lr : futex_atomic_cmpxchg_inatomic arch/arm64/include/asm/futex.h:97 [inline]
lr : cmpxchg_futex_value_locked kernel/futex/core.c:779 [inline]
lr : lock_pi_update_atomic+0x108/0x254 kernel/futex/core.c:1382
sp : ffff80001fdc74e0
x29: ffff80001fdc74e0 x28: ffff0000d3ef51c0 x27: 0000000000400040
x26: 0000000080000001 x25: dfff800000000000 x24: 1fffe0001a7dece1
x23: 0000000000000001 x22: 00000000fffffff2 x21: 0000000080000001
x20: ffff0000d3ef6708 x19: 0000000080000001 x18: 0000000000000000
x17: 0000000000000002 x16: ffff8000083ca6a8 x15: 000000000000000d
x14: 0000000000ff0100 x13: 1ffff0000282e06b x12: 0000000000000000
x11: 000000002000cffc x10: 00000000fffffff2 x9 : 0000000000000080
x8 : 00000000fffffff5 x7 : ffff80000820263c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000080000001 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 futex_atomic_cmpxchg_inatomic arch/arm64/include/asm/futex.h:99 [inline]
 cmpxchg_futex_value_locked kernel/futex/core.c:779 [inline]
 lock_pi_update_atomic+0x158/0x254 kernel/futex/core.c:1382
 futex_lock_pi_atomic+0x3e8/0xea4 kernel/futex/core.c:1499
 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: 4b0c0129 35ffff49 2a0803f6 d5033bbf (2a1f03e0) 
---[ end trace 6bff2696cd306cf5 ]---
----------------
Code disassembly (best guess):
   0:	4b0c0129 	sub	w9, w9, w12
   4:	35ffff49 	cbnz	w9, 0xffffffffffffffec
   8:	2a0803f6 	mov	w22, w8
   c:	d5033bbf 	dmb	ish
* 10:	2a1f03e0 	mov	w0, wzr <-- trapping instruction