From: Frank Richter <frank.richter@dynardo.de>
Date: Wed, 7 Jun 2017 12:40:23 +0000 (+0200)
Subject: st/mesa: fix a null pointer access
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=496a691e3544d082670ac1f33059692510a2a86d;p=mesa.git

st/mesa: fix a null pointer access

Fixes crash with llvmpipe on Windows.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102148
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Brian Paul <brianp@vmware.com>
---

diff --git a/src/mesa/state_tracker/st_manager.c b/src/mesa/state_tracker/st_manager.c
index 617a691a67c..07c430dca45 100644
--- a/src/mesa/state_tracker/st_manager.c
+++ b/src/mesa/state_tracker/st_manager.c
@@ -634,7 +634,7 @@ st_context_flush(struct st_context_iface *stctxi, unsigned flags,
 
    st_flush(st, fence, pipe_flags);
 
-   if ((flags & ST_FLUSH_WAIT) && fence) {
+   if ((flags & ST_FLUSH_WAIT) && fence && *fence) {
       st->pipe->screen->fence_finish(st->pipe->screen, NULL, *fence,
                                      PIPE_TIMEOUT_INFINITE);
       st->pipe->screen->fence_reference(st->pipe->screen, fence, NULL);