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Blame SOURCES/0114-CONFDB-Fix-standalone-application-domains.patch

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From 8441030009c22daa835f89dbc36365415524b320 Mon Sep 17 00:00:00 2001
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From: Jakub Hrozek <jhrozek@redhat.com>
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Date: Fri, 31 Mar 2017 17:12:56 +0200
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Subject: [PATCH 114/118] CONFDB: Fix standalone application domains
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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When a standalone application domain was configured, for example:
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-------------------------------------------------
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[sssd]
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domains = appdomain
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[application/appdomain]
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id_provider=ldap
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ldap_uri = ldap://dc.ipa.test
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ldap_search_base = cn=accounts,dc=ipa,dc=test
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ldap_schema = rfc2307bis
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sudo_provider = none
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ldap_sasl_mech = gssapi
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krb5_realm = IPA.TEST
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krb5_server = dc.ipa.test
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ldap_user_uid_number = telephonenumber
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ldap_user_gid_number = mobile
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ldap_user_extra_attrs = location:l
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-------------------------------------------------
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We would, when unrolling the application section into a domain section,
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first add a domain stub, equivalent to:
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-----------------------------
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[domain/appdomain]
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domain_type = application
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-----------------------------
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Which in config.ldb also contains cn. Then, whem we would add the parameters
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from the [application] section, but try to add the cn again.
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This didn't happen when inheriting from a POSIX domain, because there we
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would set LDB_FLAG_REPLACE for any attributes that exist in the inherited
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domain.
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This patch skips the cn attribute both when replacing an inherited
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domain's attributes and when writing a standalone application domain.
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Resolves:
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https://pagure.io/SSSD/sssd/issue/3355
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Reviewed-by: Pavel Březina <pbrezina@redhat.com>
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(cherry picked from commit 734e73257fff1c1884b72b8cf988f6d75c3a7567)
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---
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 src/confdb/confdb.c | 26 ++++++++++++++++++++++----
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 1 file changed, 22 insertions(+), 4 deletions(-)
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diff --git a/src/confdb/confdb.c b/src/confdb/confdb.c
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index 88e114457deac3ca50c291a131122624fb6f6fe4..5bb593de03cc2fb26218b883fd1d753e31bedc2d 100644
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--- a/src/confdb/confdb.c
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+++ b/src/confdb/confdb.c
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@@ -1909,7 +1909,7 @@ static int confdb_add_app_domain(TALLOC_CTX *mem_ctx,
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     cdb_path = talloc_asprintf(mem_ctx, CONFDB_DOMAIN_PATH_TMPL, name);
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     if (cdb_path == NULL) {
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-    return ENOMEM;
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+        return ENOMEM;
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     }
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     val[0] = CONFDB_DOMAIN_TYPE_APP;
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@@ -1933,6 +1933,7 @@ static int confdb_merge_parent_domain(const char *name,
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     struct ldb_message *replace_msg = NULL;
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     struct ldb_message *app_msg = NULL;
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     struct ldb_dn *domain_dn;
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+    struct ldb_message_element *el = NULL;
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     TALLOC_CTX *tmp_ctx = NULL;
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     tmp_ctx = talloc_new(NULL);
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@@ -1974,6 +1975,12 @@ static int confdb_merge_parent_domain(const char *name,
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             replace_msg->elements[i].flags = LDB_FLAG_MOD_ADD;
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         }
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+        el = ldb_msg_find_element(replace_msg, "cn");
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+        if (el != NULL) {
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+            /* Don't add second cn */
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+            ldb_msg_remove_element(replace_msg, el);
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+        }
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+
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         ret = ldb_modify(cdb->ldb, replace_msg);
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         if (ret != LDB_SUCCESS) {
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             ret = sysdb_error_to_errno(ret);
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@@ -1993,7 +2000,14 @@ static int confdb_merge_parent_domain(const char *name,
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     app_msg->dn = domain_dn;
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     for (unsigned i = 0; i < app_section->msgs[0]->num_elements; i++) {
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-        struct ldb_message_element *el = NULL;
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+        struct ldb_message_element *app_el = &app_section->msgs[0]->elements[i];
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+
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+        /* These elements will be skipped when replacing attributes in
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+         * a domain to avoid EEXIST errors
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+         */
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+        if (strcasecmp(app_el->name, "cn") == 0) {
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+            continue;
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+        }
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         if (replace_msg != NULL) {
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             el = ldb_msg_find_element(replace_msg,
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@@ -2013,12 +2027,16 @@ static int confdb_merge_parent_domain(const char *name,
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         ret = ldb_msg_add(app_msg,
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                           &app_section->msgs[0]->elements[i],
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                           ldb_flag);
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-        if (ret != EOK) {
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+        if (ret != LDB_SUCCESS) {
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             continue;
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         }
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     }
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-    ret = ldb_modify(cdb->ldb, app_msg);
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+    /* We use permissive modification here because adding cn or
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+     * distinguishedName from the app_section to the application
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+     * message would throw EEXIST
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+     */
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+    ret = sss_ldb_modify_permissive(cdb->ldb, app_msg);
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     if (ret != LDB_SUCCESS) {
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         ret = sysdb_error_to_errno(ret);
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         DEBUG(SSSDBG_OP_FAILURE,
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-- 
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2.9.3
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