1 files changed, 6 insertions, 0 deletions
diff --git a/src/core/ngx_buf.c b/src/core/ngx_buf.c
index 31d990315..901c3f540 100644
--- a/src/core/ngx_buf.c
+++ b/src/core/ngx_buf.c
@@ -134,6 +134,12 @@ ngx_chain_add_copy(ngx_pool_t *pool, ngx_chain_t **chain, ngx_chain_t *in)
     }
 
     while (in) {
+
+        if (ngx_buf_sync_only(in->buf)) {
+            in = in->next;
+            continue;
+        }
+
         cl = ngx_alloc_chain_link(pool);
         if (cl == NULL) {
             return NGX_ERROR;