From 2670d0f91d631c72d83e97d1ecc512a4a624f669 Mon Sep 17 00:00:00 2001 From: Juha-Pekka Heikkila Date: Fri, 25 Apr 2014 11:16:50 +0300 Subject: [PATCH] glx: Added missing null check in GetDrawableAttribute() For GLX_BACK_BUFFER_AGE_EXT query added extra null check. Signed-off-by: Juha-Pekka Heikkila Reviewed-by: Ian Romanick --- src/glx/glx_pbuffer.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/src/glx/glx_pbuffer.c b/src/glx/glx_pbuffer.c index 8f48093..231ab20 100644 --- a/src/glx/glx_pbuffer.c +++ b/src/glx/glx_pbuffer.c @@ -319,8 +319,8 @@ GetDrawableAttribute(Display * dpy, GLXDrawable drawable, pdraw = GetGLXDRIDrawable(dpy, drawable); if (attribute == GLX_BACK_BUFFER_AGE_EXT) { - struct glx_screen *psc = pdraw->psc; struct glx_context *gc = __glXGetCurrentContext(); + struct glx_screen *psc; /* The GLX_EXT_buffer_age spec says: * @@ -328,12 +328,16 @@ GetDrawableAttribute(Display * dpy, GLXDrawable drawable, * the calling thread's current context a GLXBadDrawable error is * generated." */ - if (gc == NULL || gc->currentDpy != dpy || - (gc->currentDrawable != drawable && gc->currentReadable != drawable)) { - __glXSendError(dpy, GLXBadDrawable, drawable, X_GLXGetDrawableAttributes, false); + if (pdraw == NULL || gc == NULL || gc->currentDpy != dpy || + (gc->currentDrawable != drawable && + gc->currentReadable != drawable)) { + __glXSendError(dpy, GLXBadDrawable, drawable, + X_GLXGetDrawableAttributes, false); return 0; } + psc = pdraw->psc; + if (psc->driScreen->getBufferAge != NULL) *value = psc->driScreen->getBufferAge(pdraw); -- 2.7.4