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vbo: fix crash found with shared display lists

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This fixes a crash when a display list is created in one context
but executed from a second one.  The vbo_save_context::vertex_store
memeber will be NULL if we never created a display list with the
context.  Just check for that before dereferencing the pointer.

Fixes http://bugzilla.redhat.com/show_bug.cgi?id=918661

Note: This is a candidate for the stable branches.
(cherry picked from commit c2665aacdd)
This commit is contained in:
Brian Paul 2013-03-06 12:08:17 -07:00
parent 55cb78f082
commit e6616948b7
1 changed files with 1 additions and 1 deletions
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2
src/mesa/vbo/vbo_save_draw.c
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@ -253,7 +253,7 @@ vbo_save_playback_vertex_list(struct gl_context *ctx, void *data)
struct vbo_save_context *save = &vbo_context(ctx)->save;
GLboolean remap_vertex_store = GL_FALSE;
if (save->vertex_store->buffer) {
if (save->vertex_store && save->vertex_store->buffer) {
/* The vertex store is currently mapped but we're about to replay
* a display list. This can happen when a nested display list is
* being build with GL_COMPILE_AND_EXECUTE.