From 0425ab87ad21e5dbbd4a0d31e5559370ea872afd Mon Sep 17 00:00:00 2001
From: Peter Hoddie <peter@moddable.tech>
Date: Fri, 21 Jul 2023 12:55:30 -0700
Subject: [PATCH] don't overflow stack buffer

---
 xsnap/sources/xsnapPlatform.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/xsnap/sources/xsnapPlatform.c b/xsnap/sources/xsnapPlatform.c
index eb221d4..79e777c 100644
--- 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);
 }