s3:idmap_tdb2: filter out of range mappings in default idmap config

This fixes bug #6416

Michael

1 files changed, 49 insertions, 12 deletions

diff --git a/source3/winbindd/idmap_tdb2.c b/source3/winbindd/idmap_tdb2.c
index b2723270eb..d34d289906 100644
--- a/source3/winbindd/idmap_tdb2.c
+++ b/source3/winbindd/idmap_tdb2.c
@@ -357,8 +357,6 @@ static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
 {
 	NTSTATUS ret;
 	struct idmap_tdb2_context *ctx;
-	char *config_option = NULL;
-	const char *range;
 	NTSTATUS status;
 
 	status = idmap_tdb2_open_db();
@@ -370,24 +368,63 @@ static NTSTATUS idmap_tdb2_db_init(struct idmap_domain *dom,
 		return NT_STATUS_NO_MEMORY;
 	}
 
-	config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
-	if ( ! config_option) {
-		DEBUG(0, ("Out of memory!\n"));
-		ret = NT_STATUS_NO_MEMORY;
-		goto failed;
+	if (strequal(dom->name, "*")) {
+		uid_t low_uid = 0;
+		uid_t high_uid = 0;
+		gid_t low_gid = 0;
+		gid_t high_gid = 0;
+
+		ctx->filter_low_id = 0;
+		ctx->filter_high_id = 0;
+
+		if (lp_idmap_uid(&low_uid, &high_uid)) {
+			ctx->filter_low_id = low_uid;
+			ctx->filter_high_id = high_uid;
+		} else {
+			DEBUG(3, ("Warning: 'idmap uid' not set!\n"));
+		}
+
+		if (lp_idmap_gid(&low_gid, &high_gid)) {
+			if ((low_gid != low_uid) || (high_gid != high_uid)) {
+				DEBUG(1, ("Warning: 'idmap uid' and 'idmap gid'"
+				      " ranges do not agree -- building "
+				      "intersection\n"));
+				ctx->filter_low_id = MAX(ctx->filter_low_id,
+							 low_gid);
+				ctx->filter_high_id = MIN(ctx->filter_high_id,
+							  high_gid);
+			}
+		} else {
+			DEBUG(3, ("Warning: 'idmap gid' not set!\n"));
+		}
+	} else {
+		char *config_option = NULL;
+		const char *range;
+		config_option = talloc_asprintf(ctx, "idmap config %s", dom->name);
+		if ( ! config_option) {
+			DEBUG(0, ("Out of memory!\n"));
+			ret = NT_STATUS_NO_MEMORY;
+			goto failed;
+		}
+
+		range = lp_parm_const_string(-1, config_option, "range", NULL);
+		if (( ! range) ||
+		    (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2))
+		{
+			ctx->filter_low_id = 0;
+			ctx->filter_high_id = 0;
+		}
+
+		talloc_free(config_option);
 	}
 
-	range = lp_parm_const_string(-1, config_option, "range", NULL);
-	if (( ! range) ||
-	    (sscanf(range, "%u - %u", &ctx->filter_low_id, &ctx->filter_high_id) != 2) ||
-	    (ctx->filter_low_id > ctx->filter_high_id)) {
+	if (ctx->filter_low_id > ctx->filter_high_id) {
 		ctx->filter_low_id = 0;
 		ctx->filter_high_id = 0;
 	}
 
 	dom->private_data = ctx;
 
-	talloc_free(config_option);
 	return NT_STATUS_OK;
 
 failed: