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gnu: linux-pam: Allow compilation on GNU/Hurd.

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* gnu/packages/patches/linux-pam-no-setfsuid.patch: New file.
* gnu/packages/linux.scm (linux-pam)[source]: Use it.
(linux-pam-1.2)[source]: Likewise.
* gnu/local.mk (dist_patch_DATA): Add it.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>
This commit is contained in:
Rene Saavedra 2016-09-20 14:59:20 -05:00 committed by Ludovic Courtès
parent 789f09a073
commit 411264c250
No known key found for this signature in database
GPG key ID: 090B11993D9AEBB5
3 changed files with 83 additions and 3 deletions
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2
gnu/local.mk
View file

@ -5,6 +5,7 @@
# Copyright © 2013, 2014, 2015, 2016 Mark H Weaver <mhw@netris.org>
# Copyright © 2016 Chris Marusich <cmmarusich@gmail.com>
# Copyright © 2016 Kei Kebreau <kei@openmailbox.org>
# Copyright © 2016 Rene Saavedra <rennes@openmailbox.org>
#
# This file is part of GNU Guix.
#
@ -651,6 +652,7 @@ dist_patch_DATA = \
%D%/packages/patches/libwmf-CVE-2015-4695.patch \
%D%/packages/patches/libwmf-CVE-2015-4696.patch \
%D%/packages/patches/libxslt-generated-ids.patch \
%D%/packages/patches/linux-pam-no-setfsuid.patch \
%D%/packages/patches/lirc-localstatedir.patch \
%D%/packages/patches/lm-sensors-hwmon-attrs.patch \
%D%/packages/patches/lua-CVE-2014-5461.patch \

9
gnu/packages/linux.scm
View file

@ -15,6 +15,7 @@
;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2016 David Craven <david@craven.ch>
;;; Copyright © 2016 John Darrington <jmd@gnu.org>
;;; Copyright © 2016 Rene Saavedra <rennes@openmailbox.org>
;;;
;;; This file is part of GNU Guix.
;;;
@ -414,7 +415,9 @@ (define-public linux-pam
"Linux-PAM-" version ".tar.bz2"))
(sha256
(base32
"1fyi04d5nsh8ivd0rn2y0z83ylgc0licz7kifbb6xxi2ylgfs6i4"))))
"1fyi04d5nsh8ivd0rn2y0z83ylgc0licz7kifbb6xxi2ylgfs6i4"))
(patches (search-patches "linux-pam-no-setfsuid.patch"))))
(build-system gnu-build-system)
(native-inputs
`(("flex" ,flex)
@ -455,8 +458,8 @@ (define-public linux-pam-1.2
"Linux-PAM-" version ".tar.bz2"))
(sha256
(base32
"1n9lnf9gjs72kbj1g354v1xhi2j27aqaah15vykh7cnkq08i4arl"))))))
"1n9lnf9gjs72kbj1g354v1xhi2j27aqaah15vykh7cnkq08i4arl"))
(patches (search-patches "linux-pam-no-setfsuid.patch"))))))
;;;

75
gnu/packages/patches/linux-pam-no-setfsuid.patch Normal file
View file

@ -0,0 +1,75 @@
On systems without 'setfsuid', use 'setreuid' instead.
The patch originates from the Debian project for GNU/Hurd.
Authors: Steve Langasek <vorlon@debian.org>
Upstream status: A ticket was opened to request apply the patch,
ticket: 'https://fedorahosted.org/linux-pam/ticket/64'.
--- Linux-PAM-1.2.1/libpam/pam_modutil_priv.c 2015-03-24 06:02:32.000000000 -0600
+++ pam_modutil_priv-mod.c 2016-09-20 13:36:53.150663205 -0500
@@ -14,7 +14,9 @@
#include <syslog.h>
#include <pwd.h>
#include <grp.h>
+#ifdef HAVE_SYS_FSUID_H
#include <sys/fsuid.h>
+#endif /* HAVE_SYS_FSUID_H */
/*
* Two setfsuid() calls in a row are necessary to check
@@ -22,17 +24,55 @@
*/
static int change_uid(uid_t uid, uid_t *save)
{
+#ifdef HAVE_SYS_FSUID_H
uid_t tmp = setfsuid(uid);
if (save)
*save = tmp;
return (uid_t) setfsuid(uid) == uid ? 0 : -1;
+#else
+ uid_t euid = geteuid();
+ uid_t ruid = getuid();
+ if (save)
+ *save = ruid;
+ if (ruid == uid && uid != 0)
+ if (setreuid(euid, uid))
+ return -1;
+ else {
+ setreuid(0, -1);
+ if (setreuid(-1, uid)) {
+ setreuid(-1, 0);
+ setreuid(0, -1);
+ if (setreuid(-1, uid))
+ return -1;
+ }
+ }
+#endif
}
static int change_gid(gid_t gid, gid_t *save)
{
+#ifdef HAVE_SYS_FSUID_H
gid_t tmp = setfsgid(gid);
if (save)
*save = tmp;
return (gid_t) setfsgid(gid) == gid ? 0 : -1;
+#else
+ gid_t egid = getegid();
+ gid_t rgid = getgid();
+ if (save)
+ *save = rgid;
+ if (rgid == gid)
+ if (setregid(egid, gid))
+ return -1;
+ else {
+ setregid(0, -1);
+ if (setregid(-1, gid)) {
+ setregid(-1, 0);
+ setregid(0, -1);
+ if (setregid(-1, gid))
+ return -1;
+ }
+ }
+#endif
}
static int cleanup(struct pam_modutil_privs *p)