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authorDaniel Mack <github@zonque.org>2015-09-05 14:33:56 +0200
committerDaniel Mack <github@zonque.org>2015-09-05 14:33:56 +0200
commitc7430c3d1a0c14aed631864b9da504ba1a9352c2 (patch)
tree0e3cb2101e50319b5518a7f78b6034442a05bc4c /src
parenta2b8814fa6b970181b71ca61e1de58cae137a7cb (diff)
parent3d1c455f9a898e7427b642800644ae7142dc7557 (diff)
Merge pull request #1157 from dvdhrm/logind-wallfix
login: fix NULL-deref on wall_message
Diffstat (limited to 'src')
-rw-r--r--src/login/logind-dbus.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
index 7cc68d4865..e433549cb9 100644
--- a/src/login/logind-dbus.c
+++ b/src/login/logind-dbus.c
@@ -1796,9 +1796,11 @@ static int update_schedule_file(Manager *m) {
if (r < 0)
return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
- t = cescape(m->wall_message);
- if (!t)
- return log_oom();
+ if (!isempty(m->wall_message)) {
+ t = cescape(m->wall_message);
+ if (!t)
+ return log_oom();
+ }
r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
if (r < 0)
@@ -1814,7 +1816,7 @@ static int update_schedule_file(Manager *m) {
m->enable_wall_messages,
m->scheduled_shutdown_type);
- if (!isempty(m->wall_message))
+ if (t)
fprintf(f, "WALL_MESSAGE=%s\n", t);
r = fflush_and_check(f);