fix segfault if $limit_rate was logged

diff --git a/src/http/ngx_http_variables.c b/src/http/ngx_http_variables.c
index a8f5d96c85f2c7b26ac21307af531a01f62d02f9..cf87f3fac147af37a84e7c93b9b2ad392f07e821 100644 (file)
--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -14,6 +14,8 @@ static ngx_int_t ngx_http_variable_request(ngx_http_request_t *r,
     ngx_http_variable_value_t *v, uintptr_t data);
 static void ngx_http_variable_request_set(ngx_http_request_t *r,
     ngx_http_variable_value_t *v, uintptr_t data);
+static ngx_int_t ngx_http_variable_request_get_size(ngx_http_request_t *r,
+    ngx_http_variable_value_t *v, uintptr_t data);
 static void ngx_http_variable_request_set_size(ngx_http_request_t *r,
     ngx_http_variable_value_t *v, uintptr_t data);
 static ngx_int_t ngx_http_variable_header(ngx_http_request_t *r,
@@ -238,7 +240,7 @@ static ngx_http_variable_t  ngx_http_core_variables[] = {
       offsetof(ngx_http_request_t, headers_out.cache_control), 0, 0 },
 
     { ngx_string("limit_rate"), ngx_http_variable_request_set_size,
-      ngx_http_variable_request,
+      ngx_http_variable_request_get_size,
       offsetof(ngx_http_request_t, limit_rate),
       NGX_HTTP_VAR_CHANGEABLE|NGX_HTTP_VAR_NOCACHEABLE, 0 },
 
@@ -568,6 +570,28 @@ ngx_http_variable_request_set(ngx_http_request_t *r,
 }
 
 
+static ngx_int_t
+ngx_http_variable_request_get_size(ngx_http_request_t *r,
+    ngx_http_variable_value_t *v, uintptr_t data)
+{
+    size_t  *sp;
+
+    sp = (size_t *) ((char *) r + data);
+
+    v->data = ngx_pnalloc(r->pool, NGX_SIZE_T_LEN);
+    if (v->data == NULL) {
+        return NGX_ERROR;
+    }
+
+    v->len = ngx_sprintf(v->data, "%uz", *sp) - v->data;
+    v->valid = 1;
+    v->no_cacheable = 0;
+    v->not_found = 0;
+
+    return NGX_OK;
+}
+
+
 static void
 ngx_http_variable_request_set_size(ngx_http_request_t *r,
     ngx_http_variable_value_t *v, uintptr_t data)