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-rw-r--r--xorg-server/glx/glxcmds.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/xorg-server/glx/glxcmds.c b/xorg-server/glx/glxcmds.c
index be1f2c659..fb477fa98 100644
--- a/xorg-server/glx/glxcmds.c
+++ b/xorg-server/glx/glxcmds.c
@@ -491,6 +491,13 @@ __glXGetDrawable(__GLXcontext *glxc, GLXDrawable drawId, ClientPtr client,
return pGlxDraw;
}
+ /* No active context and an unknown drawable, bail. */
+ if (glxc == NULL) {
+ client->errorValue = drawId;
+ *error = BadMatch;
+ return NULL;
+ }
+
/* The drawId wasn't a GLX drawable. Make sure it's a window and
* create a GLXWindow for it. Check that the drawable screen
* matches the context screen and that the context fbconfig is