From 6ec3534d202b99d46310d90032e36c3980f66e40 Mon Sep 17 00:00:00 2001
From: overtrue <anzhengchao@gmail.com>
Date: Tue, 8 Sep 2026 13:00:41 +0800
Subject: [PATCH] fix(kms): preserve directory availability errors on main

(cherry picked from commit c2a8e476f77e89f4b0a708c5cc9f0f8c7a0b14da)
---
 crates/kms/src/backends/local.rs | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/crates/kms/src/backends/local.rs b/crates/kms/src/backends/local.rs
index 1e7764f36..38c486484 100644
--- a/crates/kms/src/backends/local.rs
+++ b/crates/kms/src/backends/local.rs
@@ -1233,6 +1233,9 @@ impl LocalKmsClient {
     async fn decode_stored_key(&self, key_id: &str) -> Result<(StoredMasterKey, Vec<u8>)> {
         let key_path = self.master_key_path(key_id)?;
         if !fs::try_exists(&key_path).await? {
+            // Only an accessible key store can establish that a single key is
+            // missing; a directory outage must retain its filesystem error.
+            let _ = fs::read_dir(&self.config.key_dir).await?;
             return Err(KmsError::key_not_found(key_id));
         }