diff options
| author | Devin J. Pohly <djpohly@gmail.com> | 2020-07-30 23:23:18 -0500 |
|---|---|---|
| committer | Simon Ser <contact@emersion.fr> | 2020-07-31 09:32:14 +0200 |
| commit | aaf490d794bd077330c306face305f4a87de5809 (patch) | |
| tree | e4dad61f8f0a3a0e978c9c372d9d631646ec6b56 | |
| parent | 74f7be728715e164d5b7f174491797ce31206c8d (diff) | |
drm: fix uninitialized read
get_drm_prop_blob does not set path_len if it returns NULL. Check the
return value before path_len to avoid reading uninitialized memory.
(Granted, this doesn't change the logic at all, but it does make
Valgrind a bit happier.)
| -rw-r--r-- | backend/drm/drm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/backend/drm/drm.c b/backend/drm/drm.c index 7ecc28d3..dafe807b 100644 --- a/backend/drm/drm.c +++ b/backend/drm/drm.c @@ -1398,7 +1398,7 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) { bool is_mst = false; char *path = get_drm_prop_blob(drm->fd, wlr_conn->id, wlr_conn->props.path, &path_len); - if (path_len > 4 && path && strncmp(path, "mst:", 4) == 0) { + if (path && path_len > 4 && strncmp(path, "mst:", 4) == 0) { is_mst = true; } free(path); |