[PATCH v2 0/1] MR4944: dlls/msvcrt: Free previous environment variable when clearing

[David Kahurani (＠kahurani)]

Shifting the rest of the variables by one towards indices of lesser value
overwrites the variable being cleared and effectively leaks it.

Signed-off-by: David Kahurani

--
  v2: dlls/msvcrt: Free previous environment variable when clearing

https://gitlab.winehq.org/wine/wine/-/merge_requests/4944

[PATCH v2 1/1] dlls/msvcrt: Free previous environment variable when clearing

[David Kahurani]

From: David Kahurani

Shifting the rest of the variables by one towards indices of lesser value
overwrites the variable being cleared and effectively leaks it.

Signed-off-by: David Kahurani 
---
 dlls/msvcrt/environ.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/dlls/msvcrt/environ.c b/dlls/msvcrt/environ.c
index aa857afa615..a0d2e08c7d0 100644
--- a/dlls/msvcrt/environ.c
+++ b/dlls/msvcrt/environ.c
@@ -161,6 +161,7 @@ static int env_set(char **env, wchar_t **wenv)
     *eq = '=';
     if (!eq[1])
     {
+        free(MSVCRT__environ[idx]);
         for(; MSVCRT__environ[idx]; idx++)
             MSVCRT__environ[idx] = MSVCRT__environ[idx + 1];
     }
@@ -187,6 +188,7 @@ static int env_set(char **env, wchar_t **wenv)
     *weq = '=';
     if (!weq[1])
     {
+        free(MSVCRT__wenviron[idx]);
         for(; MSVCRT__wenviron[idx]; idx++)
             MSVCRT__wenviron[idx] = MSVCRT__wenviron[idx + 1];
     }

[PATCH v2 0/1] MR4944: dlls/msvcrt: Free previous environment variable when clearing - approved

[Piotr Caban (＠piotr)]

This merge request was approved by Piotr Caban.