Mesa (master): meta: Avoid random memory access on error

[Chad Versace]

Module: Mesa
Branch: master
Commit: 51632d6f27860c4e217a34fbb23864dfa56c4c48
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=51632d6f27860c4e217a34fbb23864dfa56c4c48

Author: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
Date:   Sat Apr 16 22:26:22 2016 +0300

meta: Avoid random memory access on error

Initialize drawFb to NULL in _mesa_meta_CopyImageSubData_uncompressed()
if getting readFb fails uninitialized drawFb will cause randomness
on cleanup.

Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila at gmail.com>
Reviewed-by: Eduardo Lima Mitev <elima at igalia.com>
Reviewed-by: Chad Versace <chad.versace at intel.com>

---

 src/mesa/drivers/common/meta_copy_image.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mesa/drivers/common/meta_copy_image.c b/src/mesa/drivers/common/meta_copy_image.c
index 9402a46..ebea428 100644
--- a/src/mesa/drivers/common/meta_copy_image.c
+++ b/src/mesa/drivers/common/meta_copy_image.c
@@ -168,7 +168,7 @@ _mesa_meta_CopyImageSubData_uncompressed(struct gl_context *ctx,
    GLuint src_view_texture = 0;
    struct gl_texture_image *src_view_tex_image;
    struct gl_framebuffer *readFb;
-   struct gl_framebuffer *drawFb;
+   struct gl_framebuffer *drawFb = NULL;
    bool success = false;
    GLbitfield mask;
    GLenum status, attachment;