From patchwork Mon Aug 5 13:08:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Namjae Jeon X-Patchwork-Id: 13753619 Received: from mail-pf1-f178.google.com (mail-pf1-f178.google.com [209.85.210.178]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5BBE81E49F for ; Mon, 5 Aug 2024 13:10:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.178 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722863417; cv=none; b=E+1KSDvpEBQc439FCfEjI889UpaBrd8K8aycwco739h02Ti4F21kfy3xDbLU8wUNONP5HAR0mVij9hI0dfn4cUIyRjvH80nHNfG9+KxbDEsc3EIOXxBtOoz8uUsCiMJsfqlSQ2QiRqlaH+yK4hjWcuRexxmvUJBrtGzHJphO2lA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722863417; c=relaxed/simple; bh=DRClaTdYiByvrUblgQlNnzU4MbeM2NkRQSUeAB9WXkk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=CA4C0f4Sv3EQlYrbKC5m7+1MFX+2aQA7tgIsIWw3bDWD+y8CxbSTyeFI16/4TKoZQjaBnCB8bQW9eqyJXZZissuN8xLtvIVGyS8qxQ/yWUs0QnlRD04owc3ul0WnZ55I1ydMf7VGO5GVkbAKbAI6CjP+8XGjBcc5AXNHwNBQ94I= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.210.178 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pf1-f178.google.com with SMTP id d2e1a72fcca58-70d18112b60so4237650b3a.1 for ; Mon, 05 Aug 2024 06:10:16 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722863415; x=1723468215; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=lcUWMtqQl8q2mBKwrfF19DQRldGR72ujoT40+y+yb6E=; b=mcRaGUrIT/QWrl0lXJ2QSLOVacsojoPDEUZ4OjhSZJ5qhxnoeeaiuTuZ/UM97dB82y RaYVhN6oYdXp/fUcadhP06q4fUYBs756Uvhx9bTsVOWxvyMFmC651A0DYm26fvafIvXp GoSxc4MbWnkaPJm6aESyZRdIEzbmrHH7sc5qmoFdJxRbuM3tpHYw2ZzOM30jWbnQ/lqo srLCnl/PehE5mAG8aQSwxmE7gX5zfdqitnocZzmI27P5HaMb09n4fAt2KDS67vMwqCYf gO53SbyaPkhauMCXBo/MOruS4hz89sK4216UsvhtvcxF0t09fe31tWYk0hcwK4YQEUg5 8l5Q== X-Gm-Message-State: AOJu0YyjMAC6oGoI/iY9zIEqurtZZ9KocLTo8ahCQirNHywLNcz+blvA 7/OJcT4HLkoO5ujnScu1Q3ii+lFlKcYcVxsFieK+oswFfqh3MFWSCfYBGw== X-Google-Smtp-Source: AGHT+IHosVa0Vmb5I4nXqgS2NhoZmJWzpzJy+ehVtYz4yKfPe1fyOR8WDHiQwtKvtzBcykDIaasM5A== X-Received: by 2002:a05:6a00:9463:b0:710:4e4c:a4ba with SMTP id d2e1a72fcca58-7106da92b84mr17398546b3a.13.1722863415335; Mon, 05 Aug 2024 06:10:15 -0700 (PDT) Received: from localhost.localdomain ([1.227.206.162]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7106ec01098sm5362730b3a.40.2024.08.05.06.10.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Aug 2024 06:10:15 -0700 (PDT) From: Namjae Jeon To: linux-cifs@vger.kernel.org Cc: smfrench@gmail.com, senozhatsky@chromium.org, tom@talpey.com, atteh.mailbox@gmail.com, Namjae Jeon , Sangsoo Lee Subject: [PATCH 2/2] ksmbd: override fsids for smb2_query_info() Date: Mon, 5 Aug 2024 22:08:50 +0900 Message-Id: <20240805130850.3776-2-linkinjeon@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240805130850.3776-1-linkinjeon@kernel.org> References: <20240805130850.3776-1-linkinjeon@kernel.org> Precedence: bulk X-Mailing-List: linux-cifs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sangsoo reported that a DAC denial error occurred when accessing files through the ksmbd thread. This patch override fsids for smb2_query_info(). Reported-by: Sangsoo Lee Signed-off-by: Namjae Jeon --- fs/smb/server/smb2pdu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c index 54154d36ea2f..2df1354288e6 100644 --- a/fs/smb/server/smb2pdu.c +++ b/fs/smb/server/smb2pdu.c @@ -5596,6 +5596,11 @@ int smb2_query_info(struct ksmbd_work *work) ksmbd_debug(SMB, "GOT query info request\n"); + if (ksmbd_override_fsids(work)) { + rc = -ENOMEM; + goto err_out; + } + switch (req->InfoType) { case SMB2_O_INFO_FILE: ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); @@ -5614,6 +5619,7 @@ int smb2_query_info(struct ksmbd_work *work) req->InfoType); rc = -EOPNOTSUPP; } + ksmbd_revert_fsids(work); if (!rc) { rsp->StructureSize = cpu_to_le16(9); @@ -5623,6 +5629,7 @@ int smb2_query_info(struct ksmbd_work *work) le32_to_cpu(rsp->OutputBufferLength)); } +err_out: if (rc < 0) { if (rc == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED;