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aux/primconvert: handle singular incomplete restarts

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if no restart indices are found, this draw must be discarded to avoid
crashing later on

Fixes: 583070748c ("util/primconvert: handle rewriting of prim-restart draws with unsupported primtype")

Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13630>
This commit is contained in:
Mike Blumenkrantz 2021-11-01 12:48:39 -04:00 • committed by Marge Bot
parent 1e869e3fb4
commit bc345281ab
1 changed files with 5 additions and 2 deletions
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7
src/gallium/auxiliary/indices/u_primconvert.c
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@ -202,8 +202,11 @@ util_primconvert_draw_vbo(struct primconvert_context *pc,
&direct_draw_func);
/* this should always be a direct translation */
assert(new_draw.count == total_index_count);
/* step 3: allocate a temp buffer for an intermediate rewrite step */
rewrite_buffer = malloc(index_size * total_index_count);
/* step 3: allocate a temp buffer for an intermediate rewrite step
* if no indices were found, this was a single incomplete restart and can be discarded
*/
if (total_index_count)
rewrite_buffer = malloc(index_size * total_index_count);
if (!rewrite_buffer) {
if (src_transfer)
pipe_buffer_unmap(pc->pipe, src_transfer);