1 files changed, 30 insertions, 0 deletions
diff --git a/fuzz/fuzz_targets/does_not_decode_invalid_registers.rs b/fuzz/fuzz_targets/does_not_decode_invalid_registers.rs
new file mode 100644
index 0000000..0f32f73
--- /dev/null
+++ b/fuzz/fuzz_targets/does_not_decode_invalid_registers.rs
@@ -0,0 +1,30 @@
+//! instruction text should never include the word BUG - this is a symptom of selecting an invalid
+//! RegSpec while disassembling.
+
+#![no_main]
+#[macro_use] extern crate libfuzzer_sys;
+extern crate yaxpeax_x86;
+
+fuzz_target!(|data: &[u8]| {
+    let x86_64_decoder = yaxpeax_x86::long_mode::InstDecoder::default();
+    let x86_32_decoder = yaxpeax_x86::protected_mode::InstDecoder::default();
+    let x86_16_decoder = yaxpeax_x86::real_mode::InstDecoder::default();
+
+    if let Ok(inst) = x86_64_decoder.decode_slice(data) {
+        let mut res = String::new();
+        inst.write_to(&mut res).expect("format does not panic");
+        assert!(!res.contains("BUG"));
+    };
+
+    if let Ok(inst) = x86_32_decoder.decode_slice(data) {
+        let mut res = String::new();
+        inst.write_to(&mut res).expect("format does not panic");
+        assert!(!res.contains("BUG"));
+    };
+
+    if let Ok(inst) = x86_16_decoder.decode_slice(data) {
+        let mut res = String::new();
+        inst.write_to(&mut res).expect("format does not panic");
+        assert!(!res.contains("BUG"));
+    };
+});