db: bail on a prune operation if both trees have a prefix

If both trees have prefixes that don't match, bail on the prune
operation.

Signed-off-by: Paul Moore <paul@paul-moore.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/src/db.c b/src/db.c
index 596dbcd..da0dc16 100644
--- a/src/db.c
+++ b/src/db.c
@@ -497,6 +497,10 @@ static int _db_tree_prune(struct db_arg_chain_tree **existing,
 				goto prune_return;
 			}
 		} else if (_db_chain_lt(x_iter, n_iter)) {
+			/* bail if we have a prefix on the new tree */
+			if (state->flags & _DB_IST_N_PREFIX)
+				goto prune_return;
+
 			/* check the next level in the existing tree */
 			if (x_iter->nxt_t) {
 				_db_node_get(x_iter);