From eaab43540344e26889116262651001f4e42b1630 Mon Sep 17 00:00:00 2001
From: Eric Soroos <eric-github@soroos.net>
Date: Tue, 13 May 2025 10:58:37 +0200
Subject: [PATCH] Fix leak in webp_encode

* Free the output buffer on webp encode error
---
 src/_webp.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/_webp.c b/src/_webp.c
index 3aa4c408b..a7809c40e 100644
--- a/src/_webp.c
+++ b/src/_webp.c
@@ -641,6 +641,10 @@ WebPEncode_wrapper(PyObject *self, PyObject *args) {
     ImagingSectionLeave(&cookie);
 
     WebPPictureFree(&pic);
+
+    output = writer.mem;
+    ret_size = writer.size;
+
     if (!ok) {
         int error_code = (&pic)->error_code;
         char message[50] = "";
@@ -652,10 +656,9 @@ WebPEncode_wrapper(PyObject *self, PyObject *args) {
             );
         }
         PyErr_Format(PyExc_ValueError, "encoding error %d%s", error_code, message);
+        free(output);
         return NULL;
     }
-    output = writer.mem;
-    ret_size = writer.size;
 
     {
         /* I want to truncate the *_size items that get passed into WebP