Net/Security: fix memory leaks from security_secid_to_secctx()

The security_secid_to_secctx() function returns memory that must be freed
by a call to security_release_secctx() which was not always happening.  This
patch fixes two of these problems (all that I could find in the kernel source
at present).

Signed-off-by: Paul Moore <paul.moore@hp.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
Signed-off-by: James Morris <jmorris@namei.org>

2 files changed, 6 insertions, 3 deletions

diff --git a/net/netlabel/netlabel_user.c b/net/netlabel/netlabel_user.c
index 89dcc485653..85a96a3fdda 100644
--- a/net/netlabel/netlabel_user.c
+++ b/net/netlabel/netlabel_user.c
@@ -113,8 +113,10 @@ struct audit_buffer *netlbl_audit_start_common(int type,
         if (audit_info->secid != 0 &&
             security_secid_to_secctx(audit_info->secid,
                                      &secctx,
-                                     &secctx_len) == 0)
+                                     &secctx_len) == 0) {
                 audit_log_format(audit_buf, " subj=%s", secctx);
+                security_release_secctx(secctx, secctx_len);
+        }
 
         return audit_buf;
 }
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 95a47304336..e5a3be03aa0 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -2195,9 +2195,10 @@ void xfrm_audit_log(uid_t auid, u32 sid, int type, int result,
         }
 
         if (sid != 0 &&
-                security_secid_to_secctx(sid, &secctx, &secctx_len) == 0)
+            security_secid_to_secctx(sid, &secctx, &secctx_len) == 0) {
                 audit_log_format(audit_buf, " subj=%s", secctx);
-        else
+                security_release_secctx(secctx, secctx_len);
+        } else
                 audit_log_task_context(audit_buf);
 
         if (xp) {