From 3f4dbb254a7ca90dd025a5de24f0fbaf53a9342e Mon Sep 17 00:00:00 2001
From: Andreas Henriksson <andreas@fatal.se>
Date: Fri, 13 Jun 2014 18:48:19 +0200
Subject: [PATCH] core: fix invalid free() in killall()

static int killall(....) in ./src/core/killall.c tries to get "s"
initialized by calling get_process_comm(...) which calls
read_one_line_file(...) which if it fails will mean it is left
uninitialized.
It is then used in argument to strna(s) call where it is
dereferenced(!), in addition to nothing else initializing it before
the scope it is in finishes.

(cherry picked from commit 3e09eb5c83e56bc0184bd9d9c44f76047464f77c)
---
 src/core/killall.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/killall.c b/src/core/killall.c
index 57ed41c5..eab48f7d 100644
--- a/src/core/killall.c
+++ b/src/core/killall.c
@@ -168,7 +168,7 @@ static int killall(int sig, Set *pids, bool send_sighup) {
                         continue;
 
                 if (sig == SIGKILL) {
-                        _cleanup_free_ char *s;
+                        _cleanup_free_ char *s = NULL;
 
                         get_process_comm(pid, &s);
                         log_notice("Sending SIGKILL to PID "PID_FMT" (%s).", pid, strna(s));