[Bf-blender-cvs] [9b12889a1a4] master: Fix T96140: Crash on color button drag & drop

[Julian Eisel]

Commit: 9b12889a1a4e6edb595c988168e5c1dff4bf00d9
Author: Julian Eisel
Date:   Thu Mar 3 12:44:17 2022 +0100
Branches: master
https://developer.blender.org/rB9b12889a1a4e6edb595c988168e5c1dff4bf00d9

Fix T96140: Crash on color button drag & drop

Use-after-free in context store, which wasn't cleared correctly after
setting and querying.

===================================================================

M	source/blender/windowmanager/intern/wm_dragdrop.c

===================================================================

diff --git a/source/blender/windowmanager/intern/wm_dragdrop.c b/source/blender/windowmanager/intern/wm_dragdrop.c
index 4ffb6b90e11..b7c8b29ffb3 100644
--- a/source/blender/windowmanager/intern/wm_dragdrop.c
+++ b/source/blender/windowmanager/intern/wm_dragdrop.c
@@ -331,6 +331,7 @@ static wmDropBox *dropbox_active(bContext *C,
 
           const wmOperatorCallContext opcontext = wm_drop_operator_context_get(drop);
           if (WM_operator_poll_context(C, drop->ot, opcontext)) {
+            CTX_store_set(C, NULL);
             return drop;
           }
 
@@ -346,6 +347,7 @@ static wmDropBox *dropbox_active(bContext *C,
       }
     }
   }
+  CTX_store_set(C, NULL);
   return NULL;
 }