From 335fcc86d64b2d1c65833fbf0238089f75dc2c11 Mon Sep 17 00:00:00 2001
From: nevermore-muyi <12146934+nevermore-muyi@users.noreply.github.com>
Date: Fri, 13 Dec 2024 16:16:40 +0800
Subject: [PATCH] Ignore empty data when get cache result

---
 libcni/api.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libcni/api.go b/libcni/api.go
index 5a432190..b39adb6f 100644
--- a/libcni/api.go
+++ b/libcni/api.go
@@ -374,6 +374,11 @@ func (c *CNIConfig) getCachedResult(netName, cniVersion string, rt *RuntimeConf)
 		return nil, nil
 	}
 
+	if fdata == "" {
+		// Ignore empty file data; the cached result may not sync to disk
+		return nil, nil
+	}
+
 	cachedInfo := cachedInfo{}
 	if err := json.Unmarshal(fdata, &cachedInfo); err != nil || cachedInfo.Kind != CNICacheV1 {
 		return c.getLegacyCachedResult(netName, cniVersion, rt)