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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, 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 F3D12C433E2 for ; Mon, 29 Mar 2021 09:01:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C3A2961932 for ; Mon, 29 Mar 2021 09:01:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235799AbhC2JB1 (ORCPT ); Mon, 29 Mar 2021 05:01:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:52662 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234143AbhC2IcG (ORCPT ); Mon, 29 Mar 2021 04:32:06 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 439EE61883; Mon, 29 Mar 2021 08:31:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1617006691; bh=aozgTVH3HTG6JxHeF/viQWKnhix4qY/2AgcsbmddK/g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=08eXekHTrjo2ZgQBrxRdiOwEXMSkZ+ZloaO6Ey3x7wkVBjRxajqCKfyii2rlxCqIB eViYSmeHs4L53m66fHvuCd2ENGfuaSRd0hVwp2NTpWZK07atlnSMwfFLym5W4xr7Mj sl6e4zuqIcmHZ05uZqqsiFbgoeeNnM1ecz8zoAMw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Lv Yunlong , Christoph Hellwig , Sasha Levin Subject: [PATCH 5.11 054/254] nvme-rdma: Fix a use after free in nvmet_rdma_write_data_done Date: Mon, 29 Mar 2021 09:56:10 +0200 Message-Id: <20210329075634.950662202@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210329075633.135869143@linuxfoundation.org> References: <20210329075633.135869143@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Lv Yunlong [ Upstream commit abec6561fc4e0fbb19591a0b35676d8c783b5493 ] In nvmet_rdma_write_data_done, rsp is recoverd by wc->wr_cqe and freed by nvmet_rdma_release_rsp(). But after that, pr_info() used the freed chunk's member object and could leak the freed chunk address with wc->wr_cqe by computing the offset. Signed-off-by: Lv Yunlong Signed-off-by: Christoph Hellwig Signed-off-by: Sasha Levin --- drivers/nvme/target/rdma.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/nvme/target/rdma.c b/drivers/nvme/target/rdma.c index 06b6b742bb21..6c1f3ab7649c 100644 --- a/drivers/nvme/target/rdma.c +++ b/drivers/nvme/target/rdma.c @@ -802,9 +802,8 @@ static void nvmet_rdma_write_data_done(struct ib_cq *cq, struct ib_wc *wc) nvmet_req_uninit(&rsp->req); nvmet_rdma_release_rsp(rsp); if (wc->status != IB_WC_WR_FLUSH_ERR) { - pr_info("RDMA WRITE for CQE 0x%p failed with status %s (%d).\n", - wc->wr_cqe, ib_wc_status_msg(wc->status), - wc->status); + pr_info("RDMA WRITE for CQE failed with status %s (%d).\n", + ib_wc_status_msg(wc->status), wc->status); nvmet_rdma_error_comp(queue); } return; -- 2.30.1