Avoid crashing on cyclical footnotes

pulldown-cmark · Nov 23, 2023 · e6caf75 · e6caf75
1 parent b8d6487
commit e6caf75
Showing 1 changed file with 14 additions and 2 deletions.
diff --git a/fuzz/fuzz_targets/pandoc.rs b/fuzz/fuzz_targets/pandoc.rs
@@ -33,6 +33,18 @@ fuzz_target!(|text: String| {
     if text.contains("`") {
         return;
     }
+    if text.contains("[^ ") {
+        return;
+    }
+    if text.contains("[^\t") {
+        return;
+    }
+    if text.contains("[^\n") {
+        return;
+    }
+    if text.contains("[^\r") {
+        return;
+    }
 
     if text.bytes().any(|b| b > 127) {
         return;
@@ -62,13 +74,13 @@ fuzz_target!(|text: String| {
         match event {
             Event::Start(Tag::FootnoteDefinition(id)) => {
                 if id.starts_with("\n") || id.ends_with("\n") || id.starts_with("\r") || id.ends_with("\r") || id.starts_with(" ") || id.starts_with("\t") || id.contains("  ") || id.contains("\t ") || id.contains(" \t") || id.contains("\t\t") || id.ends_with(" ") || id.ends_with("\t") { return };
-                footstack.push(id.to_string());
+                footstack.push(id.trim().to_string());
             }
             Event::End(TagEnd::FootnoteDefinition) => {
                 footstack.pop();
             }
             Event::FootnoteReference(id) => {
-                if footstack.contains(&id.to_string()) {
+                if footstack.contains(&id.trim().to_string()) {
                     return;
                 }
             }