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 CA13019580B; Sun, 23 Jun 2024 13:45:14 +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=1719150314; cv=none; b=SCXJoMKVk8G9wQPuiw7QXqAAbeMlqvExcYvuYp26+UmYk3j0B59qHM3muMhWyUJfGxxzajLaTGrc+atkvpAxTq/EvwLRGcDNyidVPHDZ3LgQ0ZG1+FZQL7Bz8eBemgGiQuDtwV3LUKuNFAZQkudxsVeEajf8hN4ObZxSEF7tCt0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719150314; c=relaxed/simple; bh=XnkzjUGnmHtfejr5zlO70LbC+m3sC+G88oEw09wDnZI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=BfYz8j+Ojh+rUtP7tssoSWq3KLHqwslu13hJ/kzrMweIAUq5w43TYVriLhN71B0s7oRNld+vOylZ+s9WSHMHBi8AmUPO2dEa9WEh0RSMxYTQjLB2YJi4wT/0cU/ZbNJgy8qLxtkPBEuk6hylvmUFy1quxlF67RtlK0e4W8ueJIk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VNnvGdrC; 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="VNnvGdrC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9625EC32781; Sun, 23 Jun 2024 13:45:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1719150314; bh=XnkzjUGnmHtfejr5zlO70LbC+m3sC+G88oEw09wDnZI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VNnvGdrC9V41pRrnrgAsDy7HJHvCB3p41q5fT+tIxolZzfejm5aIxTJLb+ygrXaz0 6obvJbotQPswlWmTki8G5xfGdgIiTdpZOa2PnuHaoTrvA0/wOC3FszgP4fSnv9Wc5f QU4Ng4IQKpNvL3CS0Ca5SMFC8W3HcGYlqnYBRKENwbwV3jrUdmc2Pz8OOiemJdBlqy 1qrzvWgdsXg2Fia6atMSydqHG8kCZjpqiM+3Mr0CcjARhJTggRaPoiRkOnV6FPdlmn aFHr/Tt6x/puxZ6MSByAtQvSr2FgiwIUW6i3L/aKZLKikse4hcizT2Il6Qy9dBGjKC wZW5CfH95a7tg== 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 6.6 16/16] nvmet: always initialize cqe.result Date: Sun, 23 Jun 2024 09:44:45 -0400 Message-ID: <20240623134448.809470-16-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240623134448.809470-1-sashal@kernel.org> References: <20240623134448.809470-1-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 6.6.35 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 ce7e945cb4f7e..61bf1bc1ac243 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -936,6 +936,7 @@ 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 1d9854484e2e8..c103eba96350e 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 d8da840a1c0ed..fa9e8dc921539 100644 --- a/drivers/nvme/target/fabrics-cmd.c +++ b/drivers/nvme/target/fabrics-cmd.c @@ -225,9 +225,6 @@ 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)); @@ -305,9 +302,6 @@ 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