don't overflow stack buffer

agoric-labs · Aug 21, 2023 · 0425ab8 · 0425ab8
1 parent b2ae66a
commit 0425ab8
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/xsnap/sources/xsnapPlatform.c b/xsnap/sources/xsnapPlatform.c
@@ -454,6 +454,8 @@ txID fxFindModule(txMachine* the, txSlot* realm, txID moduleID, txSlot* slot)
 	else
 		slash = path;
 	*slash = 0;
+	if ((c_strlen(path) + c_strlen(name + dot)) >= sizeof(path))
+		mxRangeError("path too long");
 	c_strcat(path, name + dot);
 	return fxNewNameC(the, path);
 }