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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B7E4C7618D for ; Thu, 6 Apr 2023 11:40:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238564AbjDFLk4 (ORCPT ); Thu, 6 Apr 2023 07:40:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48132 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238661AbjDFLjd (ORCPT ); Thu, 6 Apr 2023 07:39:33 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C80B4CA02; Thu, 6 Apr 2023 04:35:59 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id AFDC464694; Thu, 6 Apr 2023 11:34:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5D787C433EF; Thu, 6 Apr 2023 11:34:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1680780874; bh=ILK+NzhMVgSrGP+yv3HNV1N6lVl0sHs5aiKMJfLxve0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=r+0+X1hLoXGMuFzMN1Y0vAXG1WMkFCURn6OOoKWuMw2OkZYdO8mYg6YEbGVfMn8Ot i45rHVHGYHhBhKechsMA6otJQKP6c8dI/G4Rs5zeQvBl+hPD9P9IyQydr7Hu4eavrg Gu31x1gMKt1SrQzK76B8BCG5QYKX7J039G2LMDrgeFb9skMO/gTTrhK56glofAD5uk aZfXBVJ/ADptGqz+SGNrLRfG4/mY7Avi8De97a27rBwv2IgklU98J9HIDd5Dew5scM AqKk0myGuj6FJNOJuTmHvUAFhGAlhd4GpLOkxtRCk8ly9bkaJWLrQkNY6+NMe8Icak mxcKqaoCBy4hQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Damien Le Moal , Benjamin Block , "Martin K . Petersen" , Sasha Levin , jejb@linux.ibm.com, linux-scsi@vger.kernel.org Subject: [PATCH AUTOSEL 4.14 4/7] scsi: core: Improve scsi_vpd_inquiry() checks Date: Thu, 6 Apr 2023 07:34:18 -0400 Message-Id: <20230406113421.649149-4-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230406113421.649149-1-sashal@kernel.org> References: <20230406113421.649149-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Damien Le Moal [ Upstream commit f0aa59a33d2ac2267d260fe21eaf92500df8e7b4 ] Some USB-SATA adapters have broken behavior when an unsupported VPD page is probed: Depending on the VPD page number, a 4-byte header with a valid VPD page number but with a 0 length is returned. Currently, scsi_vpd_inquiry() only checks that the page number is valid to determine if the page is valid, which results in receiving only the 4-byte header for the non-existent page. This error manifests itself very often with page 0xb9 for the Concurrent Positioning Ranges detection done by sd_read_cpr(), resulting in the following error message: sd 0:0:0:0: [sda] Invalid Concurrent Positioning Ranges VPD page Prevent such misleading error message by adding a check in scsi_vpd_inquiry() to verify that the page length is not 0. Signed-off-by: Damien Le Moal Link: https://lore.kernel.org/r/20230322022211.116327-1-damien.lemoal@opensource.wdc.com Reviewed-by: Benjamin Block Signed-off-by: Martin K. Petersen Signed-off-by: Sasha Levin --- drivers/scsi/scsi.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index 80ab7ef027247..5f18599b0e5fd 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -351,11 +351,18 @@ static int scsi_vpd_inquiry(struct scsi_device *sdev, unsigned char *buffer, if (result) return -EIO; - /* Sanity check that we got the page back that we asked for */ + /* + * Sanity check that we got the page back that we asked for and that + * the page size is not 0. + */ if (buffer[1] != page) return -EIO; - return get_unaligned_be16(&buffer[2]) + 4; + result = get_unaligned_be16(&buffer[2]); + if (!result) + return -EIO; + + return result + 4; } /** -- 2.39.2