From c279d921b2ecac840943c0781f813ad88c5da942 Mon Sep 17 00:00:00 2001
From: Thomas Li <47963215+lithomas1@users.noreply.github.com>
Date: Wed, 21 Dec 2022 14:39:04 -0800
Subject: [PATCH 1/3] BUG: Fix unintialized strlen when PyUnicode_AsUTF8AndSize
 fails

---
 pandas/_libs/src/ujson/python/objToJSON.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pandas/_libs/src/ujson/python/objToJSON.c b/pandas/_libs/src/ujson/python/objToJSON.c
index a6f18e0aec4d9..4d7af13d03e6c 100644
--- a/pandas/_libs/src/ujson/python/objToJSON.c
+++ b/pandas/_libs/src/ujson/python/objToJSON.c
@@ -341,6 +341,7 @@ static char *PyUnicodeToUTF8(JSOBJ _obj, JSONTypeContext *tc,
           Set errorMsg(to tell encoder to stop),
           and let Python exception propagate. */
         JSONObjectEncoder *enc = (JSONObjectEncoder *)tc->encoder;
+        *_outLen = 0;
         enc->errorMsg = "Encoding failed.";
     }
     return encoded;

From aed9852386846d8d76f1d2e8e9a0321e8b8cf1db Mon Sep 17 00:00:00 2001
From: Thomas Li <47963215+lithomas1@users.noreply.github.com>
Date: Wed, 21 Dec 2022 19:19:44 -0800
Subject: [PATCH 2/3] Check error message before allocating buffer

---
 pandas/_libs/src/ujson/lib/ultrajsonenc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pandas/_libs/src/ujson/lib/ultrajsonenc.c b/pandas/_libs/src/ujson/lib/ultrajsonenc.c
index a74d505b0d0ec..169c5b6889077 100644
--- a/pandas/_libs/src/ujson/lib/ultrajsonenc.c
+++ b/pandas/_libs/src/ujson/lib/ultrajsonenc.c
@@ -1080,11 +1080,11 @@ void encode(JSOBJ obj, JSONObjectEncoder *enc, const char *name,
 
         case JT_UTF8: {
             value = enc->getStringValue(obj, &tc, &szlen);
-            Buffer_Reserve(enc, RESERVE_STRING(szlen));
             if (enc->errorMsg) {
                 enc->endTypeContext(obj, &tc);
                 return;
             }
+            Buffer_Reserve(enc, RESERVE_STRING(szlen));
             Buffer_AppendCharUnchecked(enc, '\"');
 
             if (enc->forceASCII) {

From 78f5987e451f7436fdf100cb6d295c490b61a44e Mon Sep 17 00:00:00 2001
From: Thomas Li <47963215+lithomas1@users.noreply.github.com>
Date: Thu, 22 Dec 2022 08:58:36 -0800
Subject: [PATCH 3/3] remove setting strlen to 0

---
 pandas/_libs/src/ujson/python/objToJSON.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/pandas/_libs/src/ujson/python/objToJSON.c b/pandas/_libs/src/ujson/python/objToJSON.c
index 4d7af13d03e6c..a6f18e0aec4d9 100644
--- a/pandas/_libs/src/ujson/python/objToJSON.c
+++ b/pandas/_libs/src/ujson/python/objToJSON.c
@@ -341,7 +341,6 @@ static char *PyUnicodeToUTF8(JSOBJ _obj, JSONTypeContext *tc,
           Set errorMsg(to tell encoder to stop),
           and let Python exception propagate. */
         JSONObjectEncoder *enc = (JSONObjectEncoder *)tc->encoder;
-        *_outLen = 0;
         enc->errorMsg = "Encoding failed.";
     }
     return encoded;