Merge pull request #4855 from tonistiigi/push-concurrent-access

AkihiroSuda · web-flow · commit 318e34b9831d · 2020-12-16T22:35:33.000+09:00
docker: avoid concurrent map access panic
diff --git a/remotes/docker/resolver.go b/remotes/docker/resolver.go
@@ -521,7 +521,10 @@ func (r *request) do(ctx context.Context) (*http.Response, error) {
 	if err != nil {
 		return nil, err
 	}
-	req.Header = r.header
+	req.Header = http.Header{} // headers need to be copied to avoid concurrent map access
+	for k, v := range r.header {
+		req.Header[k] = v
+	}
 	if r.body != nil {
 		body, err := r.body()
 		if err != nil {
