Fixed memory leaks in the root and auth_basic_user_file directives.

If a relative path is set by variables, then the ngx_conf_full_name()
function was called while processing requests, which causes allocations
from the cycle pool.

A new function that takes pool as an argument was introduced.

src/core/ngx_conf_file.c

@@ -12,7 +12,6 @@
 
 static ngx_int_t ngx_conf_handler(ngx_conf_t *cf, ngx_int_t last);
 static ngx_int_t ngx_conf_read_token(ngx_conf_t *cf);
-static ngx_int_t ngx_conf_test_full_name(ngx_str_t *name);
 static void ngx_conf_flush_files(ngx_cycle_t *cycle);
 
 
@@ -801,95 +800,10 @@ ngx_conf_include(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
 ngx_int_t
 ngx_conf_full_name(ngx_cycle_t *cycle, ngx_str_t *name, ngx_uint_t conf_prefix)
 {
-    size_t      len;
+    return ngx_get_full_name(cycle->pool,
-    u_char     *p, *n, *prefix;
+                             conf_prefix ? &cycle->conf_prefix:
-    ngx_int_t   rc;
+                                           &cycle->prefix,
-
+                             name);
-    rc = ngx_conf_test_full_name(name);
-
-    if (rc == NGX_OK) {
-        return rc;
-    }
-
-    if (conf_prefix) {
-        len = cycle->conf_prefix.len;
-        prefix = cycle->conf_prefix.data;
-
-    } else {
-        len = cycle->prefix.len;
-        prefix = cycle->prefix.data;
-    }
-
-#if (NGX_WIN32)
-
-    if (rc == 2) {
-        len = rc;
-    }
-
-#endif
-
-    n = ngx_pnalloc(cycle->pool, len + name->len + 1);
-    if (n == NULL) {
-        return NGX_ERROR;
-    }
-
-    p = ngx_cpymem(n, prefix, len);
-    ngx_cpystrn(p, name->data, name->len + 1);
-
-    name->len += len;
-    name->data = n;
-
-    return NGX_OK;
-}
-
-
-static ngx_int_t
-ngx_conf_test_full_name(ngx_str_t *name)
-{
-#if (NGX_WIN32)
-    u_char  c0, c1;
-
-    c0 = name->data[0];
-
-    if (name->len < 2) {
-        if (c0 == '/') {
-            return 2;
-        }
-
-        return NGX_DECLINED;
-    }
-
-    c1 = name->data[1];
-
-    if (c1 == ':') {
-        c0 |= 0x20;
-
-        if ((c0 >= 'a' && c0 <= 'z')) {
-            return NGX_OK;
-        }
-
-        return NGX_DECLINED;
-    }
-
-    if (c1 == '/') {
-        return NGX_OK;
-    }
-
-    if (c0 == '/') {
-        return 2;
-    }
-
-    return NGX_DECLINED;
-
-#else
-
-    if (name->data[0] == '/') {
-        return NGX_OK;
-    }
-
-    return NGX_DECLINED;
-
-#endif
 }
 
 

src/core/ngx_file.c

@@ -9,11 +9,102 @@
 #include <ngx_core.h>
 
 
+static ngx_int_t ngx_test_full_name(ngx_str_t *name);
+
+
 static ngx_atomic_t   temp_number = 0;
 ngx_atomic_t         *ngx_temp_number = &temp_number;
 ngx_atomic_int_t      ngx_random_number = 123456;
 
 
+ngx_int_t
+ngx_get_full_name(ngx_pool_t *pool, ngx_str_t *prefix, ngx_str_t *name)
+{
+    size_t      len;
+    u_char     *p, *n;
+    ngx_int_t   rc;
+
+    rc = ngx_test_full_name(name);
+
+    if (rc == NGX_OK) {
+        return rc;
+    }
+
+    len = prefix->len;
+
+#if (NGX_WIN32)
+
+    if (rc == 2) {
+        len = rc;
+    }
+
+#endif
+
+    n = ngx_pnalloc(pool, len + name->len + 1);
+    if (n == NULL) {
+        return NGX_ERROR;
+    }
+
+    p = ngx_cpymem(n, prefix->data, len);
+    ngx_cpystrn(p, name->data, name->len + 1);
+
+    name->len += len;
+    name->data = n;
+
+    return NGX_OK;
+}
+
+
+static ngx_int_t
+ngx_test_full_name(ngx_str_t *name)
+{
+#if (NGX_WIN32)
+    u_char  c0, c1;
+
+    c0 = name->data[0];
+
+    if (name->len < 2) {
+        if (c0 == '/') {
+            return 2;
+        }
+
+        return NGX_DECLINED;
+    }
+
+    c1 = name->data[1];
+
+    if (c1 == ':') {
+        c0 |= 0x20;
+
+        if ((c0 >= 'a' && c0 <= 'z')) {
+            return NGX_OK;
+        }
+
+        return NGX_DECLINED;
+    }
+
+    if (c1 == '/') {
+        return NGX_OK;
+    }
+
+    if (c0 == '/') {
+        return 2;
+    }
+
+    return NGX_DECLINED;
+
+#else
+
+    if (name->data[0] == '/') {
+        return NGX_OK;
+    }
+
+    return NGX_DECLINED;
+
+#endif
+}
+
+
 ssize_t
 ngx_write_chain_to_temp_file(ngx_temp_file_t *tf, ngx_chain_t *chain)
 {

src/core/ngx_file.h

@@ -122,6 +122,9 @@ struct ngx_tree_ctx_s {
 };
 
 
+ngx_int_t ngx_get_full_name(ngx_pool_t *pool, ngx_str_t *prefix,
+    ngx_str_t *name);
+
 ssize_t ngx_write_chain_to_temp_file(ngx_temp_file_t *tf, ngx_chain_t *chain);
 ngx_int_t ngx_create_temp_file(ngx_file_t *file, ngx_path_t *path,
     ngx_pool_t *pool, ngx_uint_t persistent, ngx_uint_t clean,

src/http/ngx_http_core_module.c

@@ -2016,7 +2016,9 @@ ngx_http_map_uri_to_path(ngx_http_request_t *r, ngx_str_t *path,
             return NULL;
         }
 
-        if (ngx_conf_full_name((ngx_cycle_t *) ngx_cycle, path, 0) != NGX_OK) {
+        if (ngx_get_full_name(r->pool, (ngx_str_t *) &ngx_cycle->prefix, path)
+            != NGX_OK)
+        {
             return NULL;
         }
 

src/http/ngx_http_script.c

@@ -1334,7 +1334,11 @@ ngx_http_script_full_name_code(ngx_http_script_engine_t *e)
     value.data = e->buf.data;
     value.len = e->pos - e->buf.data;
 
-    if (ngx_conf_full_name((ngx_cycle_t *) ngx_cycle, &value, code->conf_prefix)
+    if (ngx_get_full_name(e->request->pool,
+                          code->conf_prefix
+                                       ? (ngx_str_t *) &ngx_cycle->conf_prefix:
+                                         (ngx_str_t *) &ngx_cycle->prefix,
+                          &value)
         != NGX_OK)
     {
         e->ip = ngx_http_script_exit;

src/http/ngx_http_variables.c

@@ -1374,7 +1374,9 @@ ngx_http_variable_document_root(ngx_http_request_t *r,
             return NGX_ERROR;
         }
 
-        if (ngx_conf_full_name((ngx_cycle_t *) ngx_cycle, &path, 0) != NGX_OK) {
+        if (ngx_get_full_name(r->pool, (ngx_str_t *) &ngx_cycle->prefix, &path)
+            != NGX_OK)
+        {
             return NGX_ERROR;
         }
 
@@ -1416,7 +1418,9 @@ ngx_http_variable_realpath_root(ngx_http_request_t *r,
 
         path.data[path.len - 1] = '\0';
 
-        if (ngx_conf_full_name((ngx_cycle_t *) ngx_cycle, &path, 0) != NGX_OK) {
+        if (ngx_get_full_name(r->pool, (ngx_str_t *) &ngx_cycle->prefix, &path)
+            != NGX_OK)
+        {
             return NGX_ERROR;
         }
     }