From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35716 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933359AbeCSNoO (ORCPT ); Mon, 19 Mar 2018 09:44:14 -0400 Subject: Patch "scsi: sg: fix static checker warning in sg_is_valid_dxfer" has been added to the 3.18-stable tree To: jthumshirn@suse.de, colin.king@canonical.com, dan.carpenter@oracle.com, dgilbert@interlog.com, gregkh@linuxfoundation.org, martin.petersen@oracle.com Cc: , From: Date: Mon, 19 Mar 2018 14:44:11 +0100 Message-ID: <1521467051110113@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled scsi: sg: fix static checker warning in sg_is_valid_dxfer to the 3.18-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: scsi-sg-fix-static-checker-warning-in-sg_is_valid_dxfer.patch and it can be found in the queue-3.18 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 14074aba4bcda3764c9a702b276308b89901d5b6 Mon Sep 17 00:00:00 2001 From: Johannes Thumshirn Date: Mon, 17 Jul 2017 15:11:42 +0200 Subject: scsi: sg: fix static checker warning in sg_is_valid_dxfer From: Johannes Thumshirn commit 14074aba4bcda3764c9a702b276308b89901d5b6 upstream. dxfer_len is an unsigned int and we always assign a value > 0 to it, so it doesn't make any sense to check if it is < 0. We can't really check dxferp as well as we have both NULL and not NULL cases in the possible call paths. So just return true for SG_DXFER_FROM_DEV transfer in sg_is_valid_dxfer(). Signed-off-by: Johannes Thumshirn Reported-by: Colin Ian King Reported-by: Dan Carpenter Cc: Douglas Gilbert Signed-off-by: Martin K. Petersen Signed-off-by: Greg Kroah-Hartman --- drivers/scsi/sg.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) --- a/drivers/scsi/sg.c +++ b/drivers/scsi/sg.c @@ -770,8 +770,11 @@ static bool sg_is_valid_dxfer(sg_io_hdr_ return false; return true; case SG_DXFER_FROM_DEV: - if (hp->dxfer_len < 0) - return false; + /* + * for SG_DXFER_FROM_DEV we always set dxfer_len to > 0. dxferp + * can either be NULL or != NULL so there's no point in checking + * it either. So just return true. + */ return true; case SG_DXFER_TO_DEV: case SG_DXFER_TO_FROM_DEV: Patches currently in stable-queue which might be from jthumshirn@suse.de are queue-3.18/scsi-sg-fix-static-checker-warning-in-sg_is_valid_dxfer.patch queue-3.18/scsi-sg-only-check-for-dxfer_len-greater-than-256m.patch queue-3.18/scsi-sg-check-for-valid-direction-before-starting-the-request.patch queue-3.18/scsi-sg-close-race-condition-in-sg_remove_sfp_usercontext.patch queue-3.18/scsi-sg-fix-sg_dxfer_from_dev-transfers.patch