Reject invalid segment registers

2019-11-02 21:11:35 +01:00
parent e2026b572d
commit ab2d60da75
1 changed files with 3 additions and 0 deletions
--- a/decode.c
+++ b/decode.c
@@ -610,6 +610,9 @@ fd_decode(const uint8_t* buffer, size_t len_sz, int mode_int, uintptr_t address,
        if (reg_type == FD_RT_GPL && !(prefixes & PREFIX_REX) &&
            instr->operands[i].size == 1 && instr->operands[i].reg >= 4)
            reg_type = FD_RT_GPH;
+        // Reject invalid segment registers
+        if (reg_type == FD_RT_SEG && instr->operands[i].reg >= 6)
+            return -1;
        instr->operands[i].misc = reg_type;
    }