Zebediah Figura : quartz: Avoid accessing the advise_sink structure after it is queued.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: e22e34ecf4db9e2959f67b5fb9ae9e11c61d3cd4
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=e22e34ecf4db9e2959f67b5fb9ae9e11c61d3cd4

Author: Zebediah Figura <zfigura at codeweavers.com>
Date:   Thu Oct 21 12:41:12 2021 -0500

quartz: Avoid accessing the advise_sink structure after it is queued.

It could already have been removed and freed.

Signed-off-by: Zebediah Figura <zfigura at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/quartz/systemclock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/quartz/systemclock.c b/dlls/quartz/systemclock.c
index 56ad217c76a..f579ae754ea 100644
--- a/dlls/quartz/systemclock.c
+++ b/dlls/quartz/systemclock.c
@@ -206,6 +206,7 @@ static HRESULT add_sink(struct system_clock *clock, DWORD_PTR handle,
     sink->due_time = due_time;
     sink->period = period;
     sink->cookie = InterlockedIncrement(&cookie_counter);
+    *cookie = sink->cookie;
 
     EnterCriticalSection(&clock->cs);
     list_add_tail(&clock->sinks, &sink->entry);
@@ -217,7 +218,6 @@ static HRESULT add_sink(struct system_clock *clock, DWORD_PTR handle,
     }
     WakeConditionVariable(&clock->cv);
 
-    *cookie = sink->cookie;
     return S_OK;
 }