On 01/28/2013 04:11 PM, Stéphane Marchesin wrote:
Check that the return value from xcb_dri2_swap_buffers_reply is
non-NULL before accessing the struct members.
---
  src/glx/dri2_glx.c | 8 +++++---
  1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index a51716f..78a2a42 100644
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -789,9 +789,11 @@ dri2XcbSwapBuffers(Display *dpy,

     swap_buffers_reply =
        xcb_dri2_swap_buffers_reply(c, swap_buffers_cookie, NULL);
-   ret = merge_counter(swap_buffers_reply->swap_hi,
-                       swap_buffers_reply->swap_lo);
-   free(swap_buffers_reply);
+   if (swap_buffers_reply) {
+      ret = merge_counter(swap_buffers_reply->swap_hi,
+                          swap_buffers_reply->swap_lo);
+      free(swap_buffers_reply);
+   }
     return ret;
  }


Maybe also tag this as a candidate for the 9.0 branch.

Reviewed-by: Brian Paul <bri...@vmware.com>
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