From patchwork Sat Mar 23 19:55:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sergey Shtylyov X-Patchwork-Id: 782236 Received: from mx01.omp.ru (mx01.omp.ru [90.154.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7DE8363D for ; Sat, 23 Mar 2024 19:55:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=90.154.21.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711223761; cv=none; b=oT48mZfkzUw+bKo6A0o5iczMNPirEsgE6h84AtStvWKzehndz2kqjc/NLkU9Am9PczJk+iA/aXVDi+ZTBGsOFmN98PakJ9GfSYZ+gXt7RuUoohcpCvXvVCrVv/Xed7Lxn6UxDHZP1qCEX3tzKkyNMx9ox2vOZ36pX/4MgGnxHIg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711223761; c=relaxed/simple; bh=IExXRiSPyxynzt3IO/TQX4mLcWI0/GJ2Z3HZfkCZexg=; h=From:Subject:To:CC:Message-ID:Date:MIME-Version:Content-Type; b=BLlbIR94mBs9yzHZPbFRZEKte4+4+M1jSw+nCNIwHdjq8I6Mv3Efpvh7DEDpcPiivLmsckqptGC/t+76trBOylzlWp7yGfWr98j0oxIU+totN4/UyK4IsAhUevzjQrLf727ws8a1KrZcFnvk9kq5nkQqAnuj1jFO35CYAKmZTNQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=omp.ru; spf=pass smtp.mailfrom=omp.ru; arc=none smtp.client-ip=90.154.21.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=omp.ru Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=omp.ru Received: from [192.168.1.105] (178.176.75.120) by msexch01.omp.ru (10.188.4.12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.1258.12; Sat, 23 Mar 2024 22:55:52 +0300 From: Sergey Shtylyov Subject: [PATCH v2] usb: storage: isd200: fix sloppy typing in isd200_scsi_to_ata() To: Alan Stern , Greg Kroah-Hartman , , CC: Organization: Open Mobile Platform Message-ID: <8d6beef7-5995-c831-a7b6-ff98d3887231@omp.ru> Date: Sat, 23 Mar 2024 22:55:51 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.10.1 Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Language: en-US X-ClientProxiedBy: msexch01.omp.ru (10.188.4.12) To msexch01.omp.ru (10.188.4.12) X-KSE-ServerInfo: msexch01.omp.ru, 9 X-KSE-AntiSpam-Interceptor-Info: scan successful X-KSE-AntiSpam-Version: 6.1.0, Database issued on: 03/23/2024 19:05:56 X-KSE-AntiSpam-Status: KAS_STATUS_NOT_DETECTED X-KSE-AntiSpam-Method: none X-KSE-AntiSpam-Rate: 0 X-KSE-AntiSpam-Info: Lua profiles 184371 [Mar 23 2024] X-KSE-AntiSpam-Info: Version: 6.1.0.4 X-KSE-AntiSpam-Info: Envelope from: s.shtylyov@omp.ru X-KSE-AntiSpam-Info: LuaCore: 11 0.3.11 5ecf9895443a5066245fcb91e8430edf92b1b594 X-KSE-AntiSpam-Info: {rep_avail} X-KSE-AntiSpam-Info: {Tracking_from_domain_doesnt_match_to} X-KSE-AntiSpam-Info: 127.0.0.199:7.1.2; omp.ru:7.1.1; d41d8cd98f00b204e9800998ecf8427e.com:7.1.1 X-KSE-AntiSpam-Info: ApMailHostAddress: 178.176.75.120 X-KSE-AntiSpam-Info: Rate: 0 X-KSE-AntiSpam-Info: Status: not_detected X-KSE-AntiSpam-Info: Method: none X-KSE-AntiSpam-Info: Auth:dmarc=temperror header.from=omp.ru;spf=temperror smtp.mailfrom=omp.ru;dkim=none X-KSE-Antiphishing-Info: Clean X-KSE-Antiphishing-ScanningType: Heuristic X-KSE-Antiphishing-Method: None X-KSE-Antiphishing-Bases: 03/23/2024 19:10:00 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: Clean, bases: 3/23/2024 4:01:00 PM X-KSE-Attachment-Filter-Triggered-Rules: Clean X-KSE-Attachment-Filter-Triggered-Filters: Clean X-KSE-BulkMessagesFiltering-Scan-Result: InTheLimit When isd200_scsi_to_ata() emulates the SCSI READ/WRITE (10) commands, the LBA is a 32-bit CDB field and the transfer length is a 16-bit CDB field, so using *unsigned long* (which is 32-bit type on the 32-bit arches and 64-bit type on the 64-bit arches) to declare the lba and blockCount variables doesn't make much sense. Also, when it emulates the READ CAPACITY command, the returned LBA is a 32-bit parameter data field and the ATA device CHS mode capacity fits into 32 bits as well, so using *unsigned long* to declare the capacity variable doesn't make much sense as well. Let's use the u16/u32 types for those variables... Found by Linux Verification Center (linuxtesting.org) with the SVACE static analysis tool. Signed-off-by: Sergey Shtylyov Reviewed-by: Alan Stern --- This patch is against the 'usb-next' branch of Greg KH's usb.git repo... Changes in version 2: - fixed up the lba and blockCount variable declarations; - removed the typecasts from the blockCount variable calculation; - undid the reordering of the capacity variable declaration; - completely rewrote the patch description. drivers/usb/storage/isd200.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) Index: usb/drivers/usb/storage/isd200.c =================================================================== --- usb.orig/drivers/usb/storage/isd200.c +++ usb/drivers/usb/storage/isd200.c @@ -1232,8 +1232,8 @@ static int isd200_scsi_to_ata(struct scs int sendToTransport = 1; unsigned char sectnum, head; unsigned short cylinder; - unsigned long lba; - unsigned long blockCount; + u32 lba; + u16 blockCount; unsigned char senseData[8] = { 0, 0, 0, 0, 0, 0, 0, 0 }; memset(ataCdb, 0, sizeof(union ata_cdb)); @@ -1291,7 +1291,7 @@ static int isd200_scsi_to_ata(struct scs case READ_CAPACITY: { - unsigned long capacity; + u32 capacity; struct read_capacity_data readCapacityData; usb_stor_dbg(us, " ATA OUT - SCSIOP_READ_CAPACITY\n"); @@ -1316,7 +1316,7 @@ static int isd200_scsi_to_ata(struct scs usb_stor_dbg(us, " ATA OUT - SCSIOP_READ\n"); lba = be32_to_cpu(*(__be32 *)&srb->cmnd[2]); - blockCount = (unsigned long)srb->cmnd[7]<<8 | (unsigned long)srb->cmnd[8]; + blockCount = srb->cmnd[7] << 8 | srb->cmnd[8]; if (ata_id_has_lba(id)) { sectnum = (unsigned char)(lba); @@ -1348,7 +1348,7 @@ static int isd200_scsi_to_ata(struct scs usb_stor_dbg(us, " ATA OUT - SCSIOP_WRITE\n"); lba = be32_to_cpu(*(__be32 *)&srb->cmnd[2]); - blockCount = (unsigned long)srb->cmnd[7]<<8 | (unsigned long)srb->cmnd[8]; + blockCount = srb->cmnd[7] << 8 | srb->cmnd[8]; if (ata_id_has_lba(id)) { sectnum = (unsigned char)(lba);