Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4154 Comm: syz.0.1 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_continue fs/userfaultfd.c:1892 [inline] pc : userfaultfd_ioctl+0x2a44/0x46a0 fs/userfaultfd.c:2010 lr : userfaultfd_continue fs/userfaultfd.c:1892 [inline] lr : userfaultfd_ioctl+0x2a20/0x46a0 fs/userfaultfd.c:2010 sp : ffff80001fd37900 x29: ffff80001fd37cd0 x28: fffffffffffffffe x27: ffff700003fa6f34 x26: 0000000000014000 x25: ffff0000c0b651c0 x24: ffff0000dd112190 x23: dfff800000000000 x22: 0000002000001800 x21: 0000000020000018 x20: 00000000fffffff2 x19: ffff0000dd112000 x18: 0000000000000000 x17: 0000000000000002 x16: ffff800008a0facc 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_continue fs/userfaultfd.c:1892 [inline] userfaultfd_ioctl+0x2a44/0x46a0 fs/userfaultfd.c:2010 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 306926b9901769fb ]--- ---------------- 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