From 531bb1cc261be1e89e398417760fca1261583582 Mon Sep 17 00:00:00 2001
From: Charlie Gordon <github@chqrlie.org>
Date: Sun, 3 Mar 2024 14:05:40 +0100
Subject: Prevent UB on memcpy and floating point conversions

- add `memcpy_no_ub` that accepts null pointers for 0 count
- prevent 0 length allocation in `js_worker_postMessage`
- use safer test for `int` value in `JS_NewFloat64`,
  `JS_ToArrayLengthFree` and `js_typed_array_indexOf`
---
 lib/quickjs/cutils.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'lib/quickjs/cutils.c')

diff --git a/lib/quickjs/cutils.c b/lib/quickjs/cutils.c
index b4960f9c..c0aacef6 100644
--- a/lib/quickjs/cutils.c
+++ b/lib/quickjs/cutils.c
@@ -140,7 +140,7 @@ int dbuf_put(DynBuf *s, const uint8_t *data, size_t len)
         if (dbuf_realloc(s, s->size + len))
             return -1;
     }
-    memcpy(s->buf + s->size, data, len);
+    memcpy_no_ub(s->buf + s->size, data, len);
     s->size += len;
     return 0;
 }
-- 
cgit 1.4.1-2-gfad0