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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 7A8DAC2BB85 for ; Thu, 16 Apr 2020 15:30:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4DA8A214AF for ; Thu, 16 Apr 2020 15:30:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587051031; bh=FeXGNYdkirxuv81iCWK4RTDiAnC+H9pdUcHZk8JChQI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=bFm+3mXG23I8UWQX2y6TfdBDsg9BIrWmvGY52C74JMrCh144JTOTaZl8rT7O6QJYC 1yTLHBxIJcUB8EkM/TeNy10ggStr8BW0jz9SKt9Tl1ygwAaFv3KhZVumpmTAxRjjG1 Oa82T4eHLmLFEdgLrteUSnFcC4ERZfqAHspih8T8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2395280AbgDPPa3 (ORCPT ); Thu, 16 Apr 2020 11:30:29 -0400 Received: from mail.kernel.org ([198.145.29.99]:56922 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2636060AbgDPNnh (ORCPT ); Thu, 16 Apr 2020 09:43:37 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 7CDFE20732; Thu, 16 Apr 2020 13:43:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1587044617; bh=FeXGNYdkirxuv81iCWK4RTDiAnC+H9pdUcHZk8JChQI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=2wikHhs+RScOeRBoMrxazyZehn5keqKRvMs4cjh/70bs9rqL6RZ2RoGVVUlu07B3z vtpd2VWcNExCHbe0bOa0IGLv5iDk7lNH/rxox6xvxcI7xFM4edVKuBwldOe7HKAJKp LTN+YioDCpw/1d2id1sGyo2joXuqUy9/7uQ5g64k= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christoph Hellwig , "Alexey Dobriyan (SK hynix)" , Jens Axboe , Sasha Levin Subject: [PATCH 5.4 031/232] null_blk: fix spurious IO errors after failed past-wp access Date: Thu, 16 Apr 2020 15:22:05 +0200 Message-Id: <20200416131319.971590241@linuxfoundation.org> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200416131316.640996080@linuxfoundation.org> References: <20200416131316.640996080@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 From: Alexey Dobriyan [ Upstream commit ff77042296d0a54535ddf74412c5ae92cb4ec76a ] Steps to reproduce: BLKRESETZONE zone 0 // force EIO pwrite(fd, buf, 4096, 4096); [issue more IO including zone ioctls] It will start failing randomly including IO to unrelated zones because of ->error "reuse". Trigger can be partition detection as well if test is not run immediately which is even more entertaining. The fix is of course to clear ->error where necessary. Reviewed-by: Christoph Hellwig Signed-off-by: Alexey Dobriyan (SK hynix) Signed-off-by: Jens Axboe Signed-off-by: Sasha Levin --- drivers/block/null_blk_main.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index 6603598b7bae9..c4454cfc6d530 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -579,6 +579,7 @@ static struct nullb_cmd *__alloc_cmd(struct nullb_queue *nq) if (tag != -1U) { cmd = &nq->cmds[tag]; cmd->tag = tag; + cmd->error = BLK_STS_OK; cmd->nq = nq; if (nq->dev->irqmode == NULL_IRQ_TIMER) { hrtimer_init(&cmd->timer, CLOCK_MONOTONIC, @@ -1335,6 +1336,7 @@ static blk_status_t null_queue_rq(struct blk_mq_hw_ctx *hctx, cmd->timer.function = null_cmd_timer_expired; } cmd->rq = bd->rq; + cmd->error = BLK_STS_OK; cmd->nq = nq; blk_mq_start_request(bd->rq); -- 2.20.1