Merge tag 'q800-for-6.2-pull-request' of git://github.com/vivier/qemu-m68k into staging

Fix CID 1465231

# gpg: Signature made Tue 09 Nov 2021 04:46:03 PM CET
# gpg:                using RSA key CD2F75DDC8E3A4DC2E4F5173F30C38BD3F2FBE3C
# gpg:                issuer "laurent@vivier.eu"
# gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" [full]
# gpg:                 aka "Laurent Vivier <laurent@vivier.eu>" [full]
# gpg:                 aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" [full]

* tag 'q800-for-6.2-pull-request' of git://github.com/vivier/qemu-m68k:
  macfb: fix a memory leak (CID 1465231)

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

hw/display/macfb.c

@@ -440,21 +440,18 @@ static MacFbMode *macfb_find_mode(MacfbDisplayType display_type,
 
 static gchar *macfb_mode_list(void)
 {
-    gchar *list = NULL;
-    gchar *mode;
+    GString *list = g_string_new("");
     MacFbMode *macfb_mode;
     int i;
 
     for (i = 0; i < ARRAY_SIZE(macfb_mode_table); i++) {
         macfb_mode = &macfb_mode_table[i];
 
-        mode = g_strdup_printf("    %dx%dx%d\n", macfb_mode->width,
+        g_string_append_printf(list, "    %dx%dx%d\n", macfb_mode->width,
                                macfb_mode->height, macfb_mode->depth);
-        list = g_strconcat(mode, list, NULL);
-        g_free(mode);
     }
 
-    return list;
+    return g_string_free(list, FALSE);
 }
 
 
@@ -643,7 +640,7 @@ static bool macfb_common_realize(DeviceState *dev, MacfbState *s, Error **errp)
         gchar *list;
         error_setg(errp, "unknown display mode: width %d, height %d, depth %d",
                    s->width, s->height, s->depth);
-        list =  macfb_mode_list();
+        list = macfb_mode_list();
         error_append_hint(errp, "Available modes:\n%s", list);
         g_free(list);