Merge tag 'selinux-pr-20170831' of git://git.kernel.org/pub/scm/linux/kernel/git...
[sfrench/cifs-2.6.git] / security / selinux / hooks.c
index 45943e18da8bbd3409e35a1fff55cf3dc26a9f45..f5d304736852f98508144c23e7325068c6ae2ee8 100644 (file)
@@ -2376,7 +2376,7 @@ static int selinux_bprm_set_creds(struct linux_binprm *bprm)
 
        /* SELinux context only depends on initial program or script and not
         * the script interpreter */
-       if (bprm->cred_prepared)
+       if (bprm->called_set_creds)
                return 0;
 
        old_tsec = current_security();
@@ -2462,30 +2462,17 @@ static int selinux_bprm_set_creds(struct linux_binprm *bprm)
 
                /* Clear any possibly unsafe personality bits on exec: */
                bprm->per_clear |= PER_CLEAR_ON_SETID;
-       }
-
-       return 0;
-}
-
-static int selinux_bprm_secureexec(struct linux_binprm *bprm)
-{
-       const struct task_security_struct *tsec = current_security();
-       u32 sid, osid;
-       int atsecure = 0;
-
-       sid = tsec->sid;
-       osid = tsec->osid;
 
-       if (osid != sid) {
                /* Enable secure mode for SIDs transitions unless
                   the noatsecure permission is granted between
                   the two SIDs, i.e. ahp returns 0. */
-               atsecure = avc_has_perm(osid, sid,
-                                       SECCLASS_PROCESS,
-                                       PROCESS__NOATSECURE, NULL);
+               rc = avc_has_perm(old_tsec->sid, new_tsec->sid,
+                                 SECCLASS_PROCESS, PROCESS__NOATSECURE,
+                                 NULL);
+               bprm->secureexec |= !!rc;
        }
 
-       return !!atsecure;
+       return 0;
 }
 
 static int match_file(const void *p, struct file *file, unsigned fd)
@@ -6286,7 +6273,6 @@ static struct security_hook_list selinux_hooks[] __lsm_ro_after_init = {
        LSM_HOOK_INIT(bprm_set_creds, selinux_bprm_set_creds),
        LSM_HOOK_INIT(bprm_committing_creds, selinux_bprm_committing_creds),
        LSM_HOOK_INIT(bprm_committed_creds, selinux_bprm_committed_creds),
-       LSM_HOOK_INIT(bprm_secureexec, selinux_bprm_secureexec),
 
        LSM_HOOK_INIT(sb_alloc_security, selinux_sb_alloc_security),
        LSM_HOOK_INIT(sb_free_security, selinux_sb_free_security),