pidgin/pidgin

Implement mitigation for GHSL-2021-045
release-2.x.y
2021-02-07, Gary Kramlich
fb2056ce3c58
Implement mitigation for GHSL-2021-045

This add a static inline version of `g_memdup2` if the version of glib we're
compiling against doesn't have the function.

GHSL-2021-045 was originally reported to glib at
https://gitlab.gnome.org/GNOME/glib/-/issues/2319.

More information about the entire situation can be found on the gnome
desktop-devel-list at
https://mail.gnome.org/archives/desktop-devel-list/2021-February/msg00000.html

Testing Done:
Compiled and ran tests locally.

Reviewed at https://reviews.imfreedom.org/r/483/
/**
* @file glibcompat.h Compatibility for many glib versions.
* @ingroup core
*/
/* purple
*
* Purple is the legal property of its developers, whose names are too numerous
* to list here. Please refer to the COPYRIGHT file distributed with this
* source distribution.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA
*/
#ifndef PURPLE_GLIBCOMPAT_H
#define PURPLE_GLIBCOMPAT_H
#include <glib.h>
#if !GLIB_CHECK_VERSION(2,32,0)
# define G_GNUC_BEGIN_IGNORE_DEPRECATIONS
# define G_GNUC_END_IGNORE_DEPRECATIONS
void g_queue_free_full(GQueue *queue, GDestroyNotify free_func);
gboolean g_hash_table_contains (GHashTable *hash_table, gconstpointer key);
#endif /* !GLIB_CHECK_VERSION(2,32,0) */
#ifdef __clang__
#undef G_GNUC_BEGIN_IGNORE_DEPRECATIONS
#define G_GNUC_BEGIN_IGNORE_DEPRECATIONS \
_Pragma ("clang diagnostic push") \
_Pragma ("clang diagnostic ignored \"-Wdeprecated-declarations\"")
#undef G_GNUC_END_IGNORE_DEPRECATIONS
#define G_GNUC_END_IGNORE_DEPRECATIONS \
_Pragma ("clang diagnostic pop")
#endif /* __clang__ */
/* Backport the static inline version of g_memdup2 if we don't have g_memdup2.
* see https://mail.gnome.org/archives/desktop-devel-list/2021-February/msg00000.html
* for more information.
*/
#if !GLIB_CHECK_VERSION(2, 67, 3)
static inline gpointer
g_memdup2(gconstpointer mem, gsize byte_size) {
gpointer new_mem = NULL;
if(mem && byte_size != 0) {
new_mem = g_malloc (byte_size);
memcpy (new_mem, mem, byte_size);
}
return new_mem;
}
#endif /* !GLIB_CHECK_VERSION(2, 67, 3) */
#endif /* PURPLE_GLIBCOMPAT_H */