[Bf-blender-cvs] [d6b26b3fa0c] blender-v2.93-release: Fix potential buffer overrun in drw_shader_dependencies_get

[Campbell Barton]

Commit: d6b26b3fa0c46c6a9d9c9e5d3816a713dfa261a7
Author: Campbell Barton
Date:   Fri Apr 30 14:27:44 2021 +1000
Branches: blender-v2.93-release
https://developer.blender.org/rBd6b26b3fa0c46c6a9d9c9e5d3816a713dfa261a7

Fix potential buffer overrun in drw_shader_dependencies_get

Logical error let this function to write one past the buffer bounds.

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

M	source/blender/draw/intern/draw_manager_shader.c

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

diff --git a/source/blender/draw/intern/draw_manager_shader.c b/source/blender/draw/intern/draw_manager_shader.c
index c93cbf16a30..2aad1f10154 100644
--- a/source/blender/draw/intern/draw_manager_shader.c
+++ b/source/blender/draw/intern/draw_manager_shader.c
@@ -606,10 +606,10 @@ static uint32_t drw_shader_dependencies_get(const DRWShaderLibrary *lib, const c
     haystack += 16;
     int dep = drw_shader_library_search(lib, haystack);
     if (dep == -1) {
-      char dbg_name[32];
+      char dbg_name[33];
       int i = 0;
-      while ((haystack[0] != ')') && (i < 31)) {
-        dbg_name[i] = haystack[0];
+      while ((*haystack != ')') && (i < (sizeof(dbg_name) - 2))) {
+        dbg_name[i] = *haystack;
         haystack++;
         i++;
       }