Fix CVE-2017-6386 (memory leak introduced by fix for CVE-2017-5994).

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-5994

Patch copied from upstream source repository:

https://cgit.freedesktop.org/virglrenderer/commit/?id=737c3350850ca4dbc5633b3bdb4118176ce59920

From 737c3350850ca4dbc5633b3bdb4118176ce59920 Mon Sep 17 00:00:00 2001
From: Dave Airlie <airlied@redhat.com>
Date: Tue, 28 Feb 2017 14:52:09 +1000
Subject: renderer: fix memory leak in vertex elements state create

Reported-by: Li Qiang
Free the vertex array in error path.
This was introduced by this commit:
renderer: fix heap overflow in vertex elements state create.

I rewrote the code to not require the allocation in the first
place if we have an error, seems nicer.

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/vrend_renderer.c b/src/vrend_renderer.c
index 1bca7ad..e5d9f5c 100644
--- a/src/vrend_renderer.c
+++ b/src/vrend_renderer.c
@@ -1648,18 +1648,19 @@ int vrend_create_vertex_elements_state(struct vrend_context *ctx,
                                        unsigned num_elements,
                                        const struct pipe_vertex_element *elements)
 {
-   struct vrend_vertex_element_array *v = CALLOC_STRUCT(vrend_vertex_element_array);
+   struct vrend_vertex_element_array *v;
    const struct util_format_description *desc;
    GLenum type;
    int i;
    uint32_t ret_handle;
 
-   if (!v)
-      return ENOMEM;
-
    if (num_elements > PIPE_MAX_ATTRIBS)
       return EINVAL;
 
+   v = CALLOC_STRUCT(vrend_vertex_element_array);
+   if (!v)
+      return ENOMEM;
+
    v->count = num_elements;
    for (i = 0; i < num_elements; i++) {
       memcpy(&v->elements[i].base, &elements[i], sizeof(struct pipe_vertex_element));
-- 
cgit v0.10.2

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</td></tr></table>
<div class='path'>path: <a href='/guix/log/?id=b01480a866cf842788442f762967bac803b7e8cc'>root</a>/<a href='/guix/log/manifest.scm?id=b01480a866cf842788442f762967bac803b7e8cc'>manifest.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/manifest.scm?id=b01480a866cf842788442f762967bac803b7e8cc&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2024-08-31 19:06:37 +0200'>2024-08-31</span></td><td><a href='/guix/commit/manifest.scm?id=9af235335e8f8baf7f434a76570a954999231879'>gnu: guix: Remove unnecessary dependencies.</a><span class='msg-avail'>...<span class='msg-tooltip'>This reverts 0fda0486523d67c2c464386c07a0c2800d8d8c20, instead moving
the dependencies needed for ‘make dist’ to ‘manifest.scm’.

Removing this extra dependencies make it simpler to build the ‘guix’
package in particular on less-capable systems like i586-gnu.

* gnu/packages/package-management.scm (guix)[native-inputs]: Remove
IMAGEMAGICK and PERL.  Use GRAPHVIZ-MINIMAL instead of GRAPHVIZ.
* manifest.scm: Use the full-blown ‘graphviz’ package; add ‘imagemagick’
and ‘perl’.

Reported-by: Janneke Nieuwenhuizen &lt;janneke@gnu.org&gt;
Change-Id: Ia9d05c699e3cc2f9a9235a67f8ec840c26b66a82
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2024-06-24 08:51:43 -0400'>2024-06-24</span></td><td><a href='/guix/commit/manifest.scm?id=7f194852a46edfe47537d11bc39fb1dd20e18b37'>manifest: Streamline; add packages useful for patch review/submission.</a><span class='msg-avail'>...<span class='msg-tooltip'>* manifest.scm: Fix alternate command line invocation (which would not
consider 'manifest.scm').  Use specifications instead of packages.  Remove
perl (now in the guix package's native inputs).  Add b4, git, git:send-email,
mumi, nss-certs, openssl and patman to the manifest.

Change-Id: I49d92dda059856ce217cea9054a466a1754dcf94
Signed-off-by: Maxim Cournoyer &lt;maxim.cournoyer@gmail.com&gt;
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-04-02 23:28:58 +0200'>2024-04-02</span></td><td><a href='/guix/commit/manifest.scm?id=049273bb8c1ea3d6402db646312acdc4abf4678a'>maint: Add perl to the manifest.</a><span class='msg-avail'>...<span class='msg-tooltip'>* manifest.scm: Add perl.

Change-Id: Ie70cea1eb4d62f2a649292209391a92abdae2288
</span></span></td><td>Janneke Nieuwenhuizen</td></tr>
<tr><td><span title='2024-01-31 09:07:25 +0100'>2024-01-31</span></td><td><a href='/guix/commit/manifest.scm?id=66dd088d3c3404f5cbe2d4d4c5e8f93d184703b0'>maint: Add gnupg to the manifest.</a><span class='msg-avail'>...<span class='msg-tooltip'>* manifest.scm: Add gnupg.

Change-Id: Id5e90f87e5c3a07aa3e49afa97cc0b6d3ce71b41
</span></span></td><td>Ludovic Courtès</td></tr>