File 0004-selinux-fix-potential-double-free-crash-in... of Package systemd

Overview Repositories Revisions Requests Users Attributes Meta

File 0004-selinux-fix-potential-double-free-crash-in-child-pro.patch of Package systemd (Revision 3494bf2ed83c235bc925d99621645482)

Currently displaying revision 3494bf2ed83c235bc925d99621645482 , Show latest

From 5e78424f4a27c07be50e246308035c877f204038 Mon Sep 17 00:00:00 2001
From: Michal Sekletar <msekleta@redhat.com>
Date: Mon, 13 Oct 2014 15:25:09 +0200
Subject: [PATCH] selinux: fix potential double free crash in child process

Before returning from function we should reset ret to NULL, thus cleanup
function is nop.

Also context_str() returns pointer to a string containing context but not a
copy, hence we must make copy it explicitly.
---
 src/shared/label.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git src/shared/label.c src/shared/label.c
index b6af38d..69d4616 100644
--- src/shared/label.c
+++ src/shared/label.c
@@ -334,7 +334,7 @@ int label_get_child_mls_label(int socket_fd, const char *exe, char **label) {
         }
 
         freecon(mycon);
-        mycon = context_str(bcon);
+        mycon = strdup(context_str(bcon));
         if (!mycon) {
                 r = -errno;
                 goto out;
@@ -348,6 +348,7 @@ int label_get_child_mls_label(int socket_fd, const char *exe, char **label) {
         }
 
         *label = ret;
+        ret = NULL;
         r = 0;
 
 out:
-- 
1.7.9.2

Places

File 0004-selinux-fix-potential-double-free-crash-in-child-pro.patch of Package systemd (Revision 3494bf2ed83c235bc925d99621645482)

Places