relax validation when loading lifecycle document from the backend (#9612)

cmd/bucket-lifecycle-handler.go

@@ -72,6 +72,12 @@ func (api objectAPIHandlers) PutBucketLifecycleHandler(w http.ResponseWriter, r
 		return
 	}
 
+	// Validate the received bucket policy document
+	if err = bucketLifecycle.Validate(); err != nil {
+		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
+		return
+	}
+
 	if err = objAPI.SetBucketLifecycle(ctx, bucket, bucketLifecycle); err != nil {
 		writeErrorResponse(ctx, w, toAPIError(ctx, err), r.URL, guessIsBrowserReq(r))
 		return

cmd/bucket-lifecycle.go

@@ -23,6 +23,7 @@ import (
 	"path"
 	"sync"
 
+	"github.com/minio/minio/cmd/logger"
 	"github.com/minio/minio/pkg/bucket/lifecycle"
 )
 
@@ -148,9 +149,15 @@ func (sys *LifecycleSys) load(buckets []BucketInfo, objAPI ObjectLayer) error {
 			return err
 		}
 
+		// Do not load the lifecycle configuration if it is not valid
+		err = config.Validate()
+		if err != nil {
+			logger.LogIf(context.Background(), err)
+			continue
+		}
+
 		sys.Set(bucket.Name, config)
 	}
-
 	return nil
 }