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ui: Fix memory leak in qemu_xkeymap_mapping_table() 

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: 2ec78706d1 ("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>
This commit is contained in:
Philippe Mathieu-Daudé 2021-04-30 17:50:09 +02:00 committed by Laurent Vivier
parent db2dc7d8df
commit 7c06a34c8c
1 changed files with 10 additions and 5 deletions
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15
ui/x_keymap.c
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@ -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;
}