File 0001-Avoid-giving-an-stderr-to-kwallet.patch of Package pam_kwallet

From 8da1a47035fc92bc1496059583772bc4bd6e8ba6 Mon Sep 17 00:00:00 2001
From: Maximiliano Curia <maxy@gnuservers.com.ar>
Date: Fri, 4 May 2018 22:06:06 +0200
Subject: [PATCH] Avoid giving an stderr to kwallet

Summary:
The fixes for CVE-2018-10380 introduced a regression for most users not
using kde, and some for kde sessions. In particular the reorder of the
close calls and creating a new socket caused that the socket is always
assigned the file descriptor 2, aka stderr.

BUG: 393856

Test Plan: It works

Reviewers: #plasma, aacid

Reviewed By: aacid

Subscribers: asturmlechner, rdieter, davidedmundson, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D12702
---
 pam_kwallet.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/pam_kwallet.c b/pam_kwallet.c
index b9c984a..661ed8d 100644
--- a/pam_kwallet.c
+++ b/pam_kwallet.c
@@ -375,7 +375,8 @@ static int drop_privileges(struct passwd *userInfo)
 static void execute_kwallet(pam_handle_t *pamh, struct passwd *userInfo, int toWalletPipe[2], char *fullSocket)
 {
     //In the child pam_syslog does not work, using syslog directly
-    int x = 2;
+    //keep stderr open so socket doesn't returns us that fd
+    int x = 3;
     //Close fd that are not of interest of kwallet
     for (; x < 64; ++x) {
         if (x != toWalletPipe[0]) {
@@ -424,6 +425,8 @@ static void execute_kwallet(pam_handle_t *pamh, struct passwd *userInfo, int toW
         pam_syslog(pamh, LOG_INFO, "%s-kwalletd: Couldn't listen in socket\n", logPrefix);
         return;
     }
+    //finally close stderr
+    close(2);
 
     // Fork twice to daemonize kwallet
     setsid();
-- 
2.16.2