411264c250
* 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>
76 lines
1.7 KiB
Diff
76 lines
1.7 KiB
Diff
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)
|