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Fix buffer overflow on X11 error bug

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Skip descendant checking if cursor over desktop in query_x11_window_at_pos.
Simplify and correct check for whether cursor is over conky.

Signed-off-by: Tin Švagelj <tin.svagelj@live.com>
This commit is contained in:
Tin Švagelj 2024-02-25 02:57:20 +01:00 committed by Brenden Matthews
parent 56a81ef4fd
commit 27d64fe834
2 changed files with 13 additions and 9 deletions
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15
src/display-x11.cc
View File

@ -411,15 +411,16 @@ bool display_output_x11::main_loop_wait(double t) {
query_x11_window_at_pos(display, data->root_x, data->root_y);
static bool cursor_inside = false;
if ((query_result != 0 && query_result == window.window) ||
((query_result == window.desktop || query_result == window.root ||
query_result == 0) &&
data->root_x >= window.x &&
// - over conky window
// - conky has now window, over desktop and within conky region
bool cursor_over_conky = query_result == window.window &&
(window.window != 0u ||
(data->root_x >= window.x &&
data->root_x < (window.x + window.width) &&
data->root_y >= window.y &&
data->root_y < (window.y + window.height))) {
// cursor is inside conky
data->root_y < (window.y + window.height)));
if (cursor_over_conky) {
if (!cursor_inside) {
llua_mouse_hook(mouse_crossing_event(
mouse_event_t::AREA_ENTER, data->root_x - window.x,

5
src/x11.cc
View File

@ -258,7 +258,7 @@ static int x11_error_handler(Display *d, XErrorEvent *err) {
const char *minor = xcb_errors_get_name_for_minor_code(
xcb_errors_ctx, err->request_code, err->minor_code);
if (minor != nullptr) {
const std::size_t size = strlen(base_name) + strlen(extension) + 4;
const std::size_t size = strlen(major) + strlen(minor) + 4;
code_description = new char[size];
snprintf(code_description, size, "%s - %s", major, minor);
code_allocated = true;
@ -1403,6 +1403,9 @@ Window query_x11_window_at_pos(Display *display, int x, int y) {
XQueryPointer(display, window.root, &root_return, &last, &root_x_return,
&root_y_return, &win_x_return, &win_y_return, &mask_return);
// If root, last descendant will be wrong
if (last == 0) return 0;
// X11 correctly returns a window which covers conky area, but returned
// window is not window.window, but instead a parent node in some cases and
// the window.window we want to check for is a 1x1 child of that window.