From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E819AC4360F for ; Thu, 4 Apr 2019 01:37:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB6D82184B for ; Thu, 4 Apr 2019 01:37:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726444AbfDDBhp (ORCPT ); Wed, 3 Apr 2019 21:37:45 -0400 Received: from mail.kernel.org ([198.145.29.99]:35944 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726193AbfDDBho (ORCPT ); Wed, 3 Apr 2019 21:37:44 -0400 Received: from gandalf.local.home (cpe-66-24-58-225.stny.res.rr.com [66.24.58.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 289D42147C; Thu, 4 Apr 2019 01:37:44 +0000 (UTC) Received: from rostedt by gandalf.local.home with local (Exim 4.92) (envelope-from ) id 1hBrK3-0004wt-AW; Wed, 03 Apr 2019 21:37:43 -0400 Message-Id: <20190404013743.215647604@goodmis.org> User-Agent: quilt/0.65 Date: Wed, 03 Apr 2019 21:37:22 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Ingo Molnar , Andrew Morton , YueHaibing Subject: [for-next][PATCH 01/19] ring-buffer: Fix ring buffer size in rb_write_something() References: <20190404013721.023858792@goodmis.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: YueHaibing 'cnt' should be used to calculate ring buffer size rather than data->cnt Link: http://lkml.kernel.org/r/1537704693-184237-1-git-send-email-yuehaibing@huawei.com Signed-off-by: YueHaibing Signed-off-by: Steven Rostedt (VMware) --- kernel/trace/ring_buffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 41b6f96e5366..4f33d7d841af 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -4979,7 +4979,7 @@ static __init int rb_write_something(struct rb_test_data *data, bool nested) cnt = data->cnt + (nested ? 27 : 0); /* Multiply cnt by ~e, to make some unique increment */ - size = (data->cnt * 68 / 25) % (sizeof(rb_string) - 1); + size = (cnt * 68 / 25) % (sizeof(rb_string) - 1); len = size + sizeof(struct rb_item); -- 2.20.1