logind: check file is device node before using .st_rdev

2018-02-26 18:39:32 +01:00
parent 0410444446
commit 51ead3e377
1 changed files with 6 additions and 0 deletions
@@ -453,6 +453,12 @@ static int manager_attach_fds(Manager *m) {
                        continue;
                }

+                if (!S_ISCHR(st.st_mode) && !S_ISBLK(st.st_mode)) {
+                        log_debug("Device fd doesn't actually point to device node: %m");
+                        close_nointr(fd);
+                        continue;
+                }
+
                sd = hashmap_get(s->devices, &st.st_rdev);
                if (!sd) {
                        /* Weird, we got an fd for a session device which wasn't