File ui-Fix-memory-leak-in-qemu_xkeymap_mappi.patch of Package qemu

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File ui-Fix-memory-leak-in-qemu_xkeymap_mappi.patch of Package qemu (Revision 9b21b0e7876da0b2a2cae10b9acd3a24)

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From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= <philmd@redhat.com>
Date: Fri, 30 Apr 2021 17:50:09 +0200
Subject: ui: Fix memory leak in qemu_xkeymap_mapping_table()
MIME-Version: 1.0
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Git-commit: 7c06a34c8c4f2c883d6ab6b15faa214d4ebfb269
References: bsc#1185999

Refactor qemu_xkeymap_mapping_table() to have a single exit point,
so we can easily free the memory allocated by XGetAtomName().

This fixes when running a binary configured with --enable-sanitizers:

Direct leak of 22 byte(s) in 1 object(s) allocated from:
      #0 0x561344a7473f in malloc (qemu-system-x86_64+0x1dab73f)
      #1 0x7fa4d9dc08aa in XGetAtomName (/lib64/libX11.so.6+0x2a8aa)

Fixes: 2ec78706d18 ("ui: convert GTK and SDL1 frontends to keycodemapdb")
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20210430155009.259755-1-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Jose R. Ziviani <jziviani@suse.de>
---
 ui/x_keymap.c | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/ui/x_keymap.c b/ui/x_keymap.c
index 555086fb6bd572aeb6dda17bdd15..2ce7b899615f8368c6a6e6984eab 100644
--- a/ui/x_keymap.c
+++ b/ui/x_keymap.c
@@ -56,6 +56,7 @@ const guint16 *qemu_xkeymap_mapping_table(Display *dpy, size_t *maplen)
 {
     XkbDescPtr desc;
     const gchar *keycodes = NULL;
+    const guint16 *map;
 
     /* There is no easy way to determine what X11 server
      * and platform & keyboard driver is in use. Thus we
@@ -83,21 +84,21 @@ const guint16 *qemu_xkeymap_mapping_table(Display *dpy, size_t *maplen)
     if (check_for_xwin(dpy)) {
         trace_xkeymap_keymap("xwin");
         *maplen = qemu_input_map_xorgxwin_to_qcode_len;
-        return qemu_input_map_xorgxwin_to_qcode;
+        map = qemu_input_map_xorgxwin_to_qcode;
     } else if (check_for_xquartz(dpy)) {
         trace_xkeymap_keymap("xquartz");
         *maplen = qemu_input_map_xorgxquartz_to_qcode_len;
-        return qemu_input_map_xorgxquartz_to_qcode;
+        map = qemu_input_map_xorgxquartz_to_qcode;
     } else if ((keycodes && g_str_has_prefix(keycodes, "evdev")) ||
                (XKeysymToKeycode(dpy, XK_Page_Up) == 0x70)) {
         trace_xkeymap_keymap("evdev");
         *maplen = qemu_input_map_xorgevdev_to_qcode_len;
-        return qemu_input_map_xorgevdev_to_qcode;
+        map = qemu_input_map_xorgevdev_to_qcode;
     } else if ((keycodes && g_str_has_prefix(keycodes, "xfree86")) ||
                (XKeysymToKeycode(dpy, XK_Page_Up) == 0x63)) {
         trace_xkeymap_keymap("kbd");
         *maplen = qemu_input_map_xorgkbd_to_qcode_len;
-        return qemu_input_map_xorgkbd_to_qcode;
+        map = qemu_input_map_xorgkbd_to_qcode;
     } else {
         trace_xkeymap_keymap("NULL");
         g_warning("Unknown X11 keycode mapping '%s'.\n"
@@ -109,6 +110,10 @@ const guint16 *qemu_xkeymap_mapping_table(Display *dpy, size_t *maplen)
                   "  - xprop -root\n"
                   "  - xdpyinfo\n",
                   keycodes ? keycodes : "<null>");
-        return NULL;
+        map = NULL;
     }
+    if (keycodes) {
+        XFree((void *)keycodes);
+    }
+    return map;
 }

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File ui-Fix-memory-leak-in-qemu_xkeymap_mappi.patch of Package qemu (Revision 9b21b0e7876da0b2a2cae10b9acd3a24)

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