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-id = 1376
-title = "x86 LSL and LAR fault"
-state = "opened"
-created_at = "2022-12-16T07:56:37.974Z"
-closed_at = "n/a"
-labels = ["accel: TCG", "target: i386"]
-url = "https://gitlab.com/qemu-project/qemu/-/issues/1376"
-host-os = "Windows 10 20H2"
-host-arch = "x86"
-qemu-version = "7.1.90 (v7.2.0-rc0)"
-guest-os = "None"
-guest-arch = "x86"
-description = """From the description of LSL and LAR instructions in manual, `If the segment descriptor cannot be accessed or is an invalid type for the instruction, the ZF flag is cleared and no value is loaded in the destination operand.`. When it happens at the CPU, it seems they do nothing (nop). However, in QEMU, it crashes."""
-reproduce = """1. Compile this code
-```
-void main() {
-    asm("mov rax, 0xa02e698e741f5a6a");
-    asm("mov rbx, 0x20959ddd7a0aef");
-    asm("lsl ax, bx");
-}
-```
-2. Execute. QEMU crashes but CPU does not. This problem happens with LAR, too."""
-additional = """This bug is discovered by research conducted by KAIST SoftSec."""