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cursor: Properly check realloc for errors

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Do not override realloc's input pointer before checking for errors,
otherwise it's not possible to keep old value, as intended.

Signed-off-by: Tobias Stoeckmann <tobias@stoeckmann.org>
This commit is contained in:
Tobias Stoeckmann 2024-09-12 23:07:45 +02:00 • committed by Simon Ser
parent 2978fd701a
commit 0de833da29
1 changed files with 7 additions and 6 deletions
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13
cursor/wayland-cursor.c
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@ -351,6 +351,8 @@ load_callback(struct xcursor_images *images, void *data)
{
struct wl_cursor_theme *theme = data;
struct wl_cursor *cursor;
struct wl_cursor **p;
size_t s;
if (wl_cursor_theme_get_cursor(theme, images->name)) {
xcursor_images_destroy(images);
@ -360,15 +362,14 @@ load_callback(struct xcursor_images *images, void *data)
cursor = wl_cursor_create_from_xcursor_images(images, theme);
if (cursor) {
theme->cursor_count++;
theme->cursors =
realloc(theme->cursors,
theme->cursor_count * sizeof theme->cursors[0]);
s = theme->cursor_count + 1;
p = realloc(theme->cursors, s * sizeof theme->cursors[0]);
if (theme->cursors == NULL) {
theme->cursor_count--;
if (p == NULL) {
free(cursor);
} else {
theme->cursor_count = s;
theme->cursors = p;
theme->cursors[theme->cursor_count - 1] = cursor;
}
}