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=-9.0 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 2B6B0C28CC3 for ; Thu, 30 May 2019 03:41:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EF64B24BE9 for ; Thu, 30 May 2019 03:41:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559187679; bh=V+BBz4ewor3VDGhV2wJZv25VePeUO9pa0pnTOtYQyO8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=UTwMCr2IbkHE3WAWC1O2UkAQvSCBBhrhuUbAKg2QOGannHwuON62gIsYOX7T5Ojcn QjqwcfcBE8pR/K+LtOaZTQKHbxDcT7C9Yo9BAL5pJOJQ9M9GlqV4nFTwp7RzKOitMK vzyQvUTOqTzCJfSZtieMBIBUaCTbTZASn8M5laQg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732528AbfE3DVV (ORCPT ); Wed, 29 May 2019 23:21:21 -0400 Received: from mail.kernel.org ([198.145.29.99]:34192 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732516AbfE3DVU (ORCPT ); Wed, 29 May 2019 23:21:20 -0400 Received: from localhost (ip67-88-213-2.z213-88-67.customer.algx.net [67.88.213.2]) (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 569DF24A03; Thu, 30 May 2019 03:21:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1559186479; bh=V+BBz4ewor3VDGhV2wJZv25VePeUO9pa0pnTOtYQyO8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=e88SioLV11IBmJ6zW1cChHBfa+/jsFgrQUryJFNUaKRjViBtD8DKxGWMIAhaehrgX cppMGuXHZSPLcY9CJML7TAIvovtP2GPwV9gMDvxDMjsTiZfxb+QVY7qIHADnRTPk+9 rqjUEQMMBOHXLIDNgum6+xOeAY4xxkeUlGqB0cMo= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, kernel test robot , "Paul E. McKenney" , Sasha Levin Subject: [PATCH 4.9 114/128] rcutorture: Fix cleanup path for invalid torture_type strings Date: Wed, 29 May 2019 20:07:26 -0700 Message-Id: <20190530030454.951960906@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190530030432.977908967@linuxfoundation.org> References: <20190530030432.977908967@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit b813afae7ab6a5e91b4e16cc567331d9c2ae1f04 ] If the specified rcutorture.torture_type is not in the rcu_torture_init() function's torture_ops[] array, rcutorture prints some console messages and then invokes rcu_torture_cleanup() to set state so that a future torture test can run. However, rcu_torture_cleanup() also attempts to end the test that didn't actually start, and in doing so relies on the value of cur_ops, a value that is not particularly relevant in this case. This can result in confusing output or even follow-on failures due to attempts to use facilities that have not been properly initialized. This commit therefore sets the value of cur_ops to NULL in this case and inserts a check near the beginning of rcu_torture_cleanup(), thus avoiding relying on an irrelevant cur_ops value. Reported-by: kernel test robot Signed-off-by: Paul E. McKenney Signed-off-by: Sasha Levin --- kernel/rcu/rcutorture.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index bf08fee53dc75..5393bbcf3c1ad 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -1595,6 +1595,10 @@ rcu_torture_cleanup(void) cur_ops->cb_barrier(); return; } + if (!cur_ops) { + torture_cleanup_end(); + return; + } rcu_torture_barrier_cleanup(); torture_stop_kthread(rcu_torture_stall, stall_task); @@ -1730,6 +1734,7 @@ rcu_torture_init(void) pr_alert(" %s", torture_ops[i]->name); pr_alert("\n"); firsterr = -EINVAL; + cur_ops = NULL; goto unwind; } if (cur_ops->fqs == NULL && fqs_duration != 0) { -- 2.20.1