[Mesa-dev] [PATCH] glsl/test: Fix use after free in test_optpass.

[Hanno Böck]

The variable state is free'd and afterwards state->error is used
as the return value, resulting in a use after free bug detected
by memory safety tools like address sanitizer.

Signed-off-by: Hanno Böck <hanno at hboeck.de>
---
 src/compiler/glsl/test_optpass.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/compiler/glsl/test_optpass.cpp b/src/compiler/glsl/test_optpass.cpp
index 735129d..638ffeb 100644
--- a/src/compiler/glsl/test_optpass.cpp
+++ b/src/compiler/glsl/test_optpass.cpp
@@ -166,6 +166,7 @@ int test_optpass(int argc, char **argv)
    int loop = 0;
    int shader_type = GL_VERTEX_SHADER;
    int quiet = 0;
+   int error;
 
    const struct option optpass_opts[] = {
       { "input-ir", no_argument, &input_format_ir, 1 },
@@ -264,9 +265,11 @@ int test_optpass(int argc, char **argv)
       printf("--\n");
    }
 
+   error = state->error;
+
    ralloc_free(state);
    ralloc_free(shader);
 
-   return state->error;
+   return error;
 }
 
-- 
2.18.1