From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dan Carpenter Date: Wed, 09 Dec 2015 10:24:53 +0000 Subject: [patch RESEND] atp870u: 64 bit bug in atp885_init() Message-Id: <20151209102453.GE3173@mwanda> List-Id: References: <55B9CA3B.1030205@suse.de> In-Reply-To: <55B9CA3B.1030205@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: "James E.J. Bottomley" , Ondrej Zary Cc: "Martin K. Petersen" , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org, Hannes Reinecke On 64 bit CPUs there is a memory corruption bug on probe(). It should be a u32 pointer instead of an unsigned long pointer or we write past the end of the setupdata[] array. Signed-off-by: Dan Carpenter Reviewed-by: Hannes Reinecke --- Resending because we have shuffled the code around so the patch needed to be refreshed against linux-next. Although I do wonder why we are still working on this code since it has never worked on 64 bit systems so probably all the users gave up a decade ago. diff --git a/drivers/scsi/atp870u.c b/drivers/scsi/atp870u.c index 8b52a9d..b46997c 100644 --- a/drivers/scsi/atp870u.c +++ b/drivers/scsi/atp870u.c @@ -1413,11 +1413,11 @@ static void atp885_init(struct Scsi_Host *shpnt) atpdev->global_map[m] = 0; for (k = 0; k < 4; k++) { atp_writew_base(atpdev, 0x3c, n++); - ((unsigned long *)&setupdata[m][0])[k] = atp_readl_base(atpdev, 0x38); + ((u32 *)&setupdata[m][0])[k] = atp_readl_base(atpdev, 0x38); } for (k = 0; k < 4; k++) { atp_writew_base(atpdev, 0x3c, n++); - ((unsigned long *)&atpdev->sp[m][0])[k] = atp_readl_base(atpdev, 0x38); + ((u32 *)&atpdev->sp[m][0])[k] = atp_readl_base(atpdev, 0x38); } n += 8; }