[ros-diffs] [reactos] 131/360: [WINESYNC] msi: Protect communication with the custom action server with a critical section.

[winesync]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=b1b2cc1e8d83431bb5acc…

commit b1b2cc1e8d83431bb5acce3f341b6748acb1da34
Author:     winesync <ros-dev(a)reactos.org>
AuthorDate: Sat Mar 12 23:54:31 2022 +0100
Commit:     Mark Jansen <mark.jansen(a)reactos.org>
CommitDate: Sun Mar 20 19:27:59 2022 +0100

    [WINESYNC] msi: Protect communication with the custom action server with a critical
section.
    
    Avoids a potential race whereby an asynchronous custom action receives the
    wrong thread handle.
    
    Signed-off-by: Zebediah Figura <z.figura12(a)gmail.com>
    Signed-off-by: Hans Leidekker <hans(a)codeweavers.com>
    Signed-off-by: Alexandre Julliard <julliard(a)winehq.org>
    
    wine commit id 583edf7f59866cf0a58c978e692f3077e74b4938 by Zebediah Figura
<z.figura12(a)gmail.com>
---
 dll/win32/msi/custom.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dll/win32/msi/custom.c b/dll/win32/msi/custom.c
index 3d426190f00..9cf3ba1081c 100644
--- a/dll/win32/msi/custom.c
+++ b/dll/win32/msi/custom.c
@@ -698,6 +698,8 @@ static DWORD WINAPI custom_client_thread(void *arg)
         pipe = info->package->custom_server_64_pipe;
     }
 
+    EnterCriticalSection(&msi_custom_action_cs);
+
     if (!WriteFile(pipe, &info->guid, sizeof(info->guid), &size, NULL) ||
         size != sizeof(info->guid))
     {
@@ -710,6 +712,8 @@ static DWORD WINAPI custom_client_thread(void *arg)
         return GetLastError();
     }
 
+    LeaveCriticalSection(&msi_custom_action_cs);
+
     if (DuplicateHandle(process, (HANDLE)(DWORD_PTR)thread64, GetCurrentProcess(),
         &thread, 0, FALSE, DUPLICATE_SAME_ACCESS | DUPLICATE_CLOSE_SOURCE))
     {