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=-9.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 8A618C67839 for ; Thu, 13 Dec 2018 04:38:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4F72120849 for ; Thu, 13 Dec 2018 04:38:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544675907; bh=lN6HldHUMDFnqLgpJF+GR8BQy7JBX3djF8DaYQGUfYc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Or8eNHrfg0Sn3OTpsly66nUzt26nQwVLAQXAZLX4AeQSs2JFkZpzZWcG90gnkqRmI bPbYrpiW67HRG3opIidKUGSaI1jvNcbEb6nzhYRXzNa+Zq1f4yK5Epnd9eUzUNpoZh hL4QNeHrH9S/YhtP4DHA6wjun3MZ8PFVk1tNr+1Q= DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4F72120849 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-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728849AbeLMEi0 (ORCPT ); Wed, 12 Dec 2018 23:38:26 -0500 Received: from mail.kernel.org ([198.145.29.99]:45800 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729210AbeLMEc6 (ORCPT ); Wed, 12 Dec 2018 23:32:58 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DD1B020882; Thu, 13 Dec 2018 04:32:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1544675577; bh=lN6HldHUMDFnqLgpJF+GR8BQy7JBX3djF8DaYQGUfYc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T7m83FAUcpdqvmHPeZvrJxBiua8/3wmxqRn7ZhiKInoykRvcqvzmOHWTHkjVraXiV NHQJx71IXVQTHHcayMBl4kxUKH46FiMH3PHSWYl5HUM/5LOiBkRgVo05FN4ZnoBGQs pnZXdJlGHDYjDFl7E//tFKmkjLj0hcbXhccJPQBQ= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Israel Rukshin , Christoph Hellwig , Sasha Levin , linux-nvme@lists.infradead.org Subject: [PATCH AUTOSEL 4.9 33/34] nvmet-rdma: fix response use after free Date: Wed, 12 Dec 2018 23:31:59 -0500 Message-Id: <20181213043200.76295-33-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181213043200.76295-1-sashal@kernel.org> References: <20181213043200.76295-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Israel Rukshin [ Upstream commit d7dcdf9d4e15189ecfda24cc87339a3425448d5c ] nvmet_rdma_release_rsp() may free the response before using it at error flow. Fixes: 8407879 ("nvmet-rdma: fix possible bogus dereference under heavy load") Signed-off-by: Israel Rukshin Reviewed-by: Sagi Grimberg Reviewed-by: Max Gurtovoy Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin --- drivers/nvme/target/rdma.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c index 2dfd877974d7..486393fa4f3e 100644 --- a/drivers/nvme/target/rdma.c +++ b/drivers/nvme/target/rdma.c @@ -524,6 +524,7 @@ static void nvmet_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc) { struct nvmet_rdma_rsp *rsp = container_of(wc->wr_cqe, struct nvmet_rdma_rsp, send_cqe); + struct nvmet_rdma_queue *queue = cq->cq_context; nvmet_rdma_release_rsp(rsp); @@ -531,7 +532,7 @@ static void nvmet_rdma_send_done(struct ib_cq *cq, struct ib_wc *wc) wc->status != IB_WC_WR_FLUSH_ERR)) { pr_err("SEND for CQE 0x%p failed with status %s (%d).\n", wc->wr_cqe, ib_wc_status_msg(wc->status), wc->status); - nvmet_rdma_error_comp(rsp->queue); + nvmet_rdma_error_comp(queue); } } -- 2.19.1