From 701960dd81d24d65caaea4def9723f0c0f6c89d5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=94=90=E5=B0=8F=E9=B8=AD?= <tangtang1251@qq.com>
Date: Thu, 27 Nov 2025 15:57:38 +0800
Subject: [PATCH] fix out of range for slice (#931)

---
 .vscode/launch.json                         | 9 +++++++++
 crates/ecstore/src/erasure_coding/decode.rs | 8 +++-----
 2 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/.vscode/launch.json b/.vscode/launch.json
index 151031f6..9bf11962 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -85,6 +85,15 @@
             "cwd": "${workspaceFolder}",
             //"stopAtEntry": false,
             //"preLaunchTask": "cargo build",
+            "env": {
+                "RUSTFS_ACCESS_KEY": "rustfsadmin",
+                "RUSTFS_SECRET_KEY": "rustfsadmin",
+                "RUSTFS_VOLUMES": "./target/volume/test{1...4}",
+                "RUSTFS_ADDRESS": ":9000",
+                "RUSTFS_CONSOLE_ENABLE": "true",
+                "RUSTFS_CONSOLE_ADDRESS": "127.0.0.1:9001",
+                "RUSTFS_OBS_LOG_DIRECTORY": "./target/logs",
+            },
             "sourceLanguages": [
                 "rust"
             ],
diff --git a/crates/ecstore/src/erasure_coding/decode.rs b/crates/ecstore/src/erasure_coding/decode.rs
index ea92582b..94b69391 100644
--- a/crates/ecstore/src/erasure_coding/decode.rs
+++ b/crates/ecstore/src/erasure_coding/decode.rs
@@ -176,12 +176,10 @@ where
     let mut write_left = length;
 
     for block_op in &en_blocks[..data_blocks] {
-        if block_op.is_none() {
+        let Some(block) = block_op else {
             error!("write_data_blocks block_op.is_none()");
             return Err(io::Error::new(ErrorKind::UnexpectedEof, "Missing data block"));
-        }
-
-        let block = block_op.as_ref().unwrap();
+        };
 
         if offset >= block.len() {
             offset -= block.len();
@@ -191,7 +189,7 @@ where
         let block_slice = &block[offset..];
         offset = 0;
 
-        if write_left < block.len() {
+        if write_left < block_slice.len() {
             writer.write_all(&block_slice[..write_left]).await.map_err(|e| {
                 error!("write_data_blocks write_all err: {}", e);
                 e