[PATCH 0/2] MR9349: win32u: Fix deadlock caused by nested locking.

[Zhao Yi (＠Zhaoyi)]

Convert surface lock to recursive mutex to allow same thread
to acquire the lock multiple times, preventing deadlocks when
lock_surface() and window_surface_lock() are called nestedly.

Signed-off-by: Zhao Yi

[PATCH 1/2] win32u: Fix deadlock caused by nested locking.

[Zhao Yi]

From: Zhao Yi

Convert surface lock to recursive mutex to allow same thread
to acquire the lock multiple times, preventing deadlocks when
lock_surface() and window_surface_lock() are called nestedly.

Signed-off-by: Zhao Yi 
---
 dlls/win32u/dce.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dlls/win32u/dce.c b/dlls/win32u/dce.c
index 6ba5f1c7c44..6c7e49b2976 100644
--- a/dlls/win32u/dce.c
+++ b/dlls/win32u/dce.c
@@ -528,6 +528,7 @@ W32KAPI struct window_surface *window_surface_create( UINT size, const struct wi
                                                       const RECT *rect, BITMAPINFO *info, HBITMAP bitmap )
 {
     struct window_surface *surface;
+    pthread_mutexattr_t attr;

if (!(surface = calloc( 1, size ))) return NULL;
     surface->funcs = funcs;
@@ -546,7 +547,10 @@ W32KAPI struct window_surface *window_surface_create( UINT size, const struct wi
         return NULL;
     }

-    pthread_mutex_init( &surface->mutex, NULL );
+    pthread_mutexattr_init(&attr);
+    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE_NP);
+    pthread_mutex_init( &surface->mutex, &attr );
+    pthread_mutexattr_destroy(&attr);

TRACE( "created surface %p for hwnd %p rect %s\n", surface, hwnd, wine_dbgstr_rect( &surface->rect ) );
     return surface;

[PATCH 2/2] shell32: Fix a memory leak issue.

[Zhao Yi]

From: Zhao Yi

Signed-off-by: Zhao Yi 
---
 dlls/shell32/cpanelfolder.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/shell32/cpanelfolder.c b/dlls/shell32/cpanelfolder.c
index 69af6734f57..f611ced3c1c 100644
--- a/dlls/shell32/cpanelfolder.c
+++ b/dlls/shell32/cpanelfolder.c
@@ -131,7 +131,8 @@ HRESULT WINAPI IControlPanel_Constructor(IUnknown* pUnkOuter, REFIID riid, LPVOI
     sf->pUnkOuter = pUnkOuter ? pUnkOuter : (IUnknown *)&sf->IShellFolder2_iface;

if (FAILED(IShellFolder2_QueryInterface(&sf->IShellFolder2_iface, riid, ppv))) {
-        IShellFolder2_Release(&sf->IShellFolder2_iface);
+        SHFree(sf->pidlRoot);
+        LocalFree(sf);
    return E_NOINTERFACE;
     }
     IShellFolder2_Release(&sf->IShellFolder2_iface);

[PATCH 0/2] MR9349: win32u: Fix deadlock caused by nested locking. - closed

[Zhao Yi (＠Zhaoyi)]

This merge request was closed by Zhao Yi.