[reactos] 01/03: [CONSRV] Set 0 as a console leader PID/TID when unsetting it.

[Jérôme Gardou]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=f12e6016b6882a14b21ee…

commit f12e6016b6882a14b21ee86e708a28179885b630
Author:     Jérôme Gardou <jerome.gardou(a)reactos.org>
AuthorDate: Wed Feb 10 15:09:48 2021 +0100
Commit:     Jérôme Gardou <zefklop(a)users.noreply.github.com>
CommitDate: Wed Feb 10 17:48:30 2021 +0100

    [CONSRV] Set 0 as a console leader PID/TID when unsetting it.
    
    Instead of whatever is behind the NULL pointer.
---
 win32ss/user/winsrv/consrv/frontends/gui/conwnd.c | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/win32ss/user/winsrv/consrv/frontends/gui/conwnd.c
b/win32ss/user/winsrv/consrv/frontends/gui/conwnd.c
index de9eea6053a..6dc4249dbe8 100644
--- a/win32ss/user/winsrv/consrv/frontends/gui/conwnd.c
+++ b/win32ss/user/winsrv/consrv/frontends/gui/conwnd.c
@@ -48,14 +48,25 @@ VOID
 SetConWndConsoleLeaderCID(IN PGUI_CONSOLE_DATA GuiData)
 {
     PCONSOLE_PROCESS_DATA ProcessData;
-    CLIENT_ID ConsoleLeaderCID;
 
     ProcessData = ConSrvGetConsoleLeaderProcess(GuiData->Console);
-    ConsoleLeaderCID = ProcessData->Process->ClientId;
-    SetWindowLongPtrW(GuiData->hWindow, GWLP_CONSOLE_LEADER_PID,
-                      (LONG_PTR)(ConsoleLeaderCID.UniqueProcess));
-    SetWindowLongPtrW(GuiData->hWindow, GWLP_CONSOLE_LEADER_TID,
-                      (LONG_PTR)(ConsoleLeaderCID.UniqueThread));
+
+    DPRINT("ProcessData: %p, ProcessData->Process %p.\n", ProcessData,
ProcessData->Process);
+    ASSERT(ProcessData != NULL);
+
+    if (ProcessData->Process)
+    {
+        CLIENT_ID ConsoleLeaderCID = ProcessData->Process->ClientId;
+        SetWindowLongPtrW(GuiData->hWindow, GWLP_CONSOLE_LEADER_PID,
+                          (LONG_PTR)(ConsoleLeaderCID.UniqueProcess));
+        SetWindowLongPtrW(GuiData->hWindow, GWLP_CONSOLE_LEADER_TID,
+                          (LONG_PTR)(ConsoleLeaderCID.UniqueThread));
+    }
+    else
+    {
+        SetWindowLongPtrW(GuiData->hWindow, GWLP_CONSOLE_LEADER_PID, 0);
+        SetWindowLongPtrW(GuiData->hWindow, GWLP_CONSOLE_LEADER_TID, 0);
+    }
 }
 /**************************************************************/