From: Eric Anholt <eric@anholt.net>
Date: Tue, 22 Dec 2009 20:38:11 +0000 (-0800)
Subject: mesa: Fix a NULL deref in glDeleteFragmentShaderATI(badname);
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b08ed4f5955ef72309b6e20d865faf6d925c8c6e;p=mesa.git

mesa: Fix a NULL deref in glDeleteFragmentShaderATI(badname);

Fixes piglit ati-fs-bad-delete.  Caught by clang.
---

diff --git a/src/mesa/shader/atifragshader.c b/src/mesa/shader/atifragshader.c
index ac087d415c5..e04a05b22ff 100644
--- a/src/mesa/shader/atifragshader.c
+++ b/src/mesa/shader/atifragshader.c
@@ -290,9 +290,11 @@ _mesa_DeleteFragmentShaderATI(GLuint id)
 
       /* The ID is immediately available for re-use now */
       _mesa_HashRemove(ctx->Shared->ATIShaders, id);
-      prog->RefCount--;
-      if (prog->RefCount <= 0) {
-         _mesa_free(prog);
+      if (prog) {
+	 prog->RefCount--;
+	 if (prog->RefCount <= 0) {
+	    _mesa_free(prog);
+	 }
       }
    }
 }