From: Lennart Poettering <lennart@poettering.net>
Date: Mon, 26 Feb 2018 17:34:43 +0000 (+0100)
Subject: logind: check file is device node before using .st_rdev
X-Git-Tag: v238~51^2~3
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=51ead3e3774aa9306d637723d92bbddf2258d2cb;p=thirdparty%2Fsystemd.git

logind: check file is device node before using .st_rdev
---

diff --git a/src/login/logind.c b/src/login/logind.c
index 875d467cbbe..5220861c1d3 100644
--- a/src/login/logind.c
+++ b/src/login/logind.c
@@ -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