diff options
Diffstat (limited to 'gnu/packages/patches/linux-pam-no-setfsuid.patch')
| -rw-r--r-- | gnu/packages/patches/linux-pam-no-setfsuid.patch | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/gnu/packages/patches/linux-pam-no-setfsuid.patch b/gnu/packages/patches/linux-pam-no-setfsuid.patch new file mode 100644 index 0000000000..f92fbc057a --- /dev/null +++ b/gnu/packages/patches/linux-pam-no-setfsuid.patch @@ -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) |