From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C01FB181D0E; Sun, 23 Jun 2024 13:44:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719150278; cv=none; b=a5KNlJxOA0EmLnB6sMyq6uALznOtX4ukPhNnAr75j3+2iSptfM0JSYzA0P5ppPQEDlJHJ9YuI+Fewv3Srcm1NvaPoPMxqYYqspdTZSauacQncP59EJTdDFwZhDA8jo1o86X73hWNoRnYg6lhhJjeRU0dgiedcg3IXKYIk0Jzu/A= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719150278; c=relaxed/simple; bh=kneZVnQX/xGvS8R5iLK83sOS5TyfkaXQ1vIlBiY/tw4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=j2QGihEKP/s+Bn52W7DZmtoMKHKyF/mF/+OlM7sp2ckOEYjR8XzSk1mNK2KLMZxtyBZNwK+6mrg0OMEFntZG1xnOPAdUtsRXRmfsNx8N6ly309sKMkz+1ZnnbX88pZDq9Vr+LEK1Oniq956s0v/bdI3eo3mY5wRR7ErrnbZPPmw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=LFGokYHD; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="LFGokYHD" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 80DF4C32781; Sun, 23 Jun 2024 13:44:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719150278; bh=kneZVnQX/xGvS8R5iLK83sOS5TyfkaXQ1vIlBiY/tw4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LFGokYHDBw3d7ipWeUILAAA57bJFumaYrw2XG4JjDRc+py4u/Bl0HW+KdUpRAaonH URT0GaT7RxVLCxd7Gchs0FBLaCXr11Mu7biVgvqGICikfu2dDfFgNpIXMHeJziEk/n 82y19XPZsJ1Tiv8JzdF1oTRxYBkVMY/2O7qreorb0umkN5+0Wyj6V6ikj6tq9XYZVQ rXo0UXfEdHgLPSuFPhqm/wCATvmDS4WHzvn3WS6QCCplg5hL30MU2bm5jikkwXwV/K d/guLbsZZiK8Nz/EB8VXUaDO7tZ99oEtUNV+C1l5mE4rk4OBUSnwjefzJqQqoER7aJ Z9DqdxIUCI1LQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Daniel Wagner , Christoph Hellwig , Keith Busch , Sasha Levin , sagi@grimberg.me, kch@nvidia.com, hare@suse.de, linux-nvme@lists.infradead.org Subject: [PATCH AUTOSEL 6.9 19/21] nvmet: always initialize cqe.result Date: Sun, 23 Jun 2024 09:43:52 -0400 Message-ID: <20240623134405.809025-19-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240623134405.809025-1-sashal@kernel.org> References: <20240623134405.809025-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.9.6 Content-Transfer-Encoding: 8bit From: Daniel Wagner [ Upstream commit cd0c1b8e045a8d2785342b385cb2684d9b48e426 ] The spec doesn't mandate that the first two double words (aka results) for the command queue entry need to be set to 0 when they are not used (not specified). Though, the target implemention returns 0 for TCP and FC but not for RDMA. Let's make RDMA behave the same and thus explicitly initializing the result field. This prevents leaking any data from the stack. Signed-off-by: Daniel Wagner Reviewed-by: Christoph Hellwig Signed-off-by: Keith Busch Signed-off-by: Sasha Levin --- drivers/nvme/target/core.c | 1 + drivers/nvme/target/fabrics-cmd-auth.c | 3 --- drivers/nvme/target/fabrics-cmd.c | 6 ------ 3 files changed, 1 insertion(+), 9 deletions(-) diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 2fde22323622e..29d324b97f8c3 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -948,6 +948,7 @@ bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq, req->metadata_sg_cnt = 0; req->transfer_len = 0; req->metadata_len = 0; + req->cqe->result.u64 = 0; req->cqe->status = 0; req->cqe->sq_head = 0; req->ns = NULL; diff --git a/drivers/nvme/target/fabrics-cmd-auth.c b/drivers/nvme/target/fabrics-cmd-auth.c index eb7785be0ca77..ee76491e8b12c 100644 --- a/drivers/nvme/target/fabrics-cmd-auth.c +++ b/drivers/nvme/target/fabrics-cmd-auth.c @@ -332,7 +332,6 @@ void nvmet_execute_auth_send(struct nvmet_req *req) pr_debug("%s: ctrl %d qid %d nvme status %x error loc %d\n", __func__, ctrl->cntlid, req->sq->qid, status, req->error_loc); - req->cqe->result.u64 = 0; if (req->sq->dhchap_step != NVME_AUTH_DHCHAP_MESSAGE_SUCCESS2 && req->sq->dhchap_step != NVME_AUTH_DHCHAP_MESSAGE_FAILURE2) { unsigned long auth_expire_secs = ctrl->kato ? ctrl->kato : 120; @@ -515,8 +514,6 @@ void nvmet_execute_auth_receive(struct nvmet_req *req) status = nvmet_copy_to_sgl(req, 0, d, al); kfree(d); done: - req->cqe->result.u64 = 0; - if (req->sq->dhchap_step == NVME_AUTH_DHCHAP_MESSAGE_SUCCESS2) nvmet_auth_sq_free(req->sq); else if (req->sq->dhchap_step == NVME_AUTH_DHCHAP_MESSAGE_FAILURE1) { diff --git a/drivers/nvme/target/fabrics-cmd.c b/drivers/nvme/target/fabrics-cmd.c index b23f4cf840bd5..f6714453b8bb3 100644 --- a/drivers/nvme/target/fabrics-cmd.c +++ b/drivers/nvme/target/fabrics-cmd.c @@ -226,9 +226,6 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req) if (status) goto out; - /* zero out initial completion result, assign values as needed */ - req->cqe->result.u32 = 0; - if (c->recfmt != 0) { pr_warn("invalid connect version (%d).\n", le16_to_cpu(c->recfmt)); @@ -304,9 +301,6 @@ static void nvmet_execute_io_connect(struct nvmet_req *req) if (status) goto out; - /* zero out initial completion result, assign values as needed */ - req->cqe->result.u32 = 0; - if (c->recfmt != 0) { pr_warn("invalid connect version (%d).\n", le16_to_cpu(c->recfmt)); -- 2.43.0