Currently, get_default_output returns a first member
of the linked list, which can never be NULL.
This is problematic, as the function would return a
dangling pointer and NULL pointer checks wouldn't
work where needed and some of the invalid members
would get accessed that way, resulting in a crash.
Reviewed-by: Quentin Glidic <sardemff7+...@sardemff7.net>
Reviewed-by: Pekka Paalanen <pekka.paala...@collabora.co.uk>
Signed-off-by: Armin Krezović <krezovic.ar...@gmail.com>
---
desktop-shell/shell.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/desktop-shell/shell.c b/desktop-shell/shell.c
index 79cf8dd..c48d41a 100644
--- a/desktop-shell/shell.c
+++ b/desktop-shell/shell.c
@@ -688,6 +688,9 @@ shell_configuration(struct desktop_shell *shell)
struct weston_output *
get_default_output(struct weston_compositor *compositor)
{
+ if (wl_list_empty(&compositor->output_list))
+ return NULL;
+
return container_of(compositor->output_list.next,
struct weston_output, link);
}
--
2.9.0
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