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=-17.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, 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 9FF63C433E9 for ; Tue, 12 Jan 2021 12:59:13 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 470102310F for ; Tue, 12 Jan 2021 12:59:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 470102310F Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=kTR84bVuTng8PXtyIFY/rwd3k+iw1YoJ8jw092Xp08A=; b=Hp3Sak5R3z1gRsCqTsd+f9nol enHpvumcrHwkiRjZvP+OHbkat5mqbCc1Dj6wFqRgVtnM4sWVxG1GzJlKk73RI4vSkpjmwvhPS2jK/ qT1AzoGsKsCnapBzkO/oKeElBZyzRurJnXb1WACR+TV01LKMVVNKFupDAgIu/qsQJo+NfAXdPv2mp PXe0nmpvIVM3+IBp2UnLZ0W0SwzSnERDA+A0ARIkMkrWUYzXDuSY8kR3ymBVRBgisOHiu4EdFnyEq 8oMVpaSTaj0AFM+XkjPV9yS4Sgr8Q/bqpB8LKTi448QBOshYyzq7GALDi3hCKpnSwZi5cnQoC9Km8 mkcScg34A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kzJGP-0001jY-Jb; Tue, 12 Jan 2021 12:59:09 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kzJEc-0000hs-1K for linux-nvme@lists.infradead.org; Tue, 12 Jan 2021 12:57:19 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 1C610239D3; Tue, 12 Jan 2021 12:57:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1610456237; bh=PNvCOCoAo5+jSAER09jlgMZlmQEfKisVJhvtTf9R3O0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hfuN/le5/vlA/DvHpg8tQ3aQa4Bvlf1G2iYBMSKgVQmx+b4ttW8xltECdcWxVh9kR VD1WvOimuSVdMwd87PiHdJLrD8uO7Rh/uNBJV7pd+r3p8K6bIxg2NGRplz9QctcSw/ RHvDblns/xRMa9q5lSNohgZh8UkmG1lTF0WxRG80ckskdGvUFLK+901ZR5AymgWYAl IjwtazINfb73QVkPJVfhOorWSWQ0ccweCpuu1isu2q88elPg8xv1zSpod8XJ4PGmuq db59yqHEy27zG5LKjDDiBBnyAnnN6Mf7jbPOE6x/zfS86tYmzL/tIppoi6BxvwPnXk Evkgpl6vr7KAw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 5.4 23/28] nvmet-rdma: Fix list_del corruption on queue establishment failure Date: Tue, 12 Jan 2021 07:56:39 -0500 Message-Id: <20210112125645.70739-23-sashal@kernel.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210112125645.70739-1-sashal@kernel.org> References: <20210112125645.70739-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210112_075718_258023_5689FB32 X-CRM114-Status: GOOD ( 11.70 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Israel Rukshin , Max Gurtovoy , Christoph Hellwig , linux-nvme@lists.infradead.org, Sasha Levin Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Israel Rukshin [ Upstream commit 9ceb7863537748c67fa43ac4f2f565819bbd36e4 ] When a queue is in NVMET_RDMA_Q_CONNECTING state, it may has some requests at rsp_wait_list. In case a disconnect occurs at this state, no one will empty this list and will return the requests to free_rsps list. Normally nvmet_rdma_queue_established() free those requests after moving the queue to NVMET_RDMA_Q_LIVE state, but in this case __nvmet_rdma_queue_disconnect() is called before. The crash happens at nvmet_rdma_free_rsps() when calling list_del(&rsp->free_list), because the request exists only at the wait list. To fix the issue, simply clear rsp_wait_list when destroying the queue. Signed-off-by: Israel Rukshin Reviewed-by: Max Gurtovoy Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin --- drivers/nvme/target/rdma.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c index b5314164479e9..50e2007092bc0 100644 --- a/drivers/nvme/target/rdma.c +++ b/drivers/nvme/target/rdma.c @@ -1351,6 +1351,16 @@ static void __nvmet_rdma_queue_disconnect(struct nvmet_rdma_queue *queue) spin_lock_irqsave(&queue->state_lock, flags); switch (queue->state) { case NVMET_RDMA_Q_CONNECTING: + while (!list_empty(&queue->rsp_wait_list)) { + struct nvmet_rdma_rsp *rsp; + + rsp = list_first_entry(&queue->rsp_wait_list, + struct nvmet_rdma_rsp, + wait_list); + list_del(&rsp->wait_list); + nvmet_rdma_put_rsp(rsp); + } + fallthrough; case NVMET_RDMA_Q_LIVE: queue->state = NVMET_RDMA_Q_DISCONNECTING; disconnect = true; -- 2.27.0 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme