From e9cc8a80e0677cf0c9e8d4d1c0ecea61cd519a9c Mon Sep 17 00:00:00 2001
From: Nikita Sobolev <mail@sobolevn.me>
Date: Mon, 16 Jan 2023 13:46:07 +0300
Subject: [PATCH] gh-101056: Fix memory leak in `formatfloat()` in
 `bytesobject.c` (GH-101057) (cherry picked from commit
 b1a74a182d8762bda51838401ac92b6ebad9632a)

Co-authored-by: Nikita Sobolev <mail@sobolevn.me>
---
 Objects/bytesobject.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index eaedb0b5689b2a..4bcb2eb49298d7 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -470,8 +470,10 @@ formatfloat(PyObject *v, int flags, int prec, int type,
     len = strlen(p);
     if (writer != NULL) {
         str = _PyBytesWriter_Prepare(writer, str, len);
-        if (str == NULL)
+        if (str == NULL) {
+            PyMem_Free(p);
             return NULL;
+        }
         memcpy(str, p, len);
         PyMem_Free(p);
         str += len;