x86 CVT* series instructions fault

Host environment

• Operating system: Windows 10 20H2
• OS/kernel version: WSL2 Ubuntu 20.04.4 LTS (GNU/Linux 5.10.102.1-microsoft-standard-WSL2 x86_64)
• Architecture: x86
• QEMU flavor: qemu-x86_64
• QEMU version: 7.1.90 (v7.2.0-rc0)
• QEMU command line: qemu-x86_64 -cpu max a.out

Emulated/Virtualized environment

• Operating system: None
• OS/kernel version: None
• Architecture: x86

Description of problem

For example, CVTSD2SS instruction converts SRC[63:0] double precision floating point to DEST[31:0] single precision floating point. Although the CVTSD2SS instruction uses only 8 bytes, if it overlaps page boundary, I think QEMU tries to access over the valid memory and crashes.

Steps to reproduce

1. Compile this code

void main() {
    mmap(0x555555559000, 0x1000, flag, ~~, 0);
    asm("cvtsd2ss xmm1, qword ptr [0x555555559ff8]");
}

2. Execute. QEMU crashes but CPU does not.

Additional information

This bug is discovered by research conducted by KAIST SoftSec.