Fixing memory leak of request parse context.

src/nxt_application.c

@@ -772,21 +772,39 @@ static nxt_http_fields_hash_entry_t  nxt_app_request_fields[] = {
 };
 
 
-nxt_int_t
-nxt_app_http_req_init(nxt_task_t *task, nxt_app_parse_ctx_t *ctx)
+nxt_app_parse_ctx_t *
+nxt_app_http_req_init(nxt_task_t *task)
 {
-    nxt_int_t  rc;
+    nxt_mp_t             *mp;
+    nxt_int_t            rc;
+    nxt_app_parse_ctx_t  *ctx;
 
-    ctx->mem_pool = nxt_mp_create(1024, 128, 256, 32);
+    mp = nxt_mp_create(1024, 128, 256, 32);
+    if (nxt_slow_path(mp == NULL)) {
+        return NULL;
+    }
 
-    rc = nxt_http_parse_request_init(&ctx->parser, ctx->mem_pool);
+    ctx = nxt_mp_retain(mp, sizeof(nxt_app_parse_ctx_t));
+    if (nxt_slow_path(ctx == NULL)) {
+        nxt_mp_destroy(mp);
+
+        return NULL;
+    }
+
+    nxt_memzero(ctx, sizeof(nxt_app_parse_ctx_t));
+
+    ctx->mem_pool = mp;
+
+    rc = nxt_http_parse_request_init(&ctx->parser, mp);
     if (nxt_slow_path(rc != NXT_OK)) {
-        return rc;
+        nxt_mp_release(mp, ctx);
+
+        return NULL;
     }
 
     ctx->parser.fields_hash = nxt_app_request_fields_hash;
 
-    return NXT_OK;
+    return ctx;
 }
 
 
@@ -879,7 +897,7 @@ nxt_app_http_req_body_read(nxt_task_t *task, nxt_app_parse_ctx_t *ctx,
 nxt_int_t
 nxt_app_http_req_done(nxt_task_t *task, nxt_app_parse_ctx_t *ctx)
 {
-    nxt_mp_destroy(ctx->mem_pool);
+    nxt_mp_release(ctx->mem_pool, ctx);
 
     return NXT_OK;
 }