Upstream: for ssl name, non-aligned memory allocation is enough.

src/http/ngx_http_upstream.c

diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 8069f5e..af77e50 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -1511,7 +1511,7 @@
      * hence we explicitly null-terminate name here
      */
 
-    p = ngx_palloc(r->pool, name.len + 1);
+    p = ngx_pnalloc(r->pool, name.len + 1);
     if (p == NULL) {
         return NGX_ERROR;
     }