linux-kernel - [patch] [SCSI] aacraid: use lower snprintf() limit

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Message-ID: <20111005055046.GD32077@elgon.mountain>
Date:	Wed, 5 Oct 2011 08:50:46 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	Adaptec OEM Raid Solutions <aacraid@...ptec.com>
Cc:	"James E.J. Bottomley" <JBottomley@...allels.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch] [SCSI] aacraid: use lower snprintf() limit

This is just a cleanup, to silence static checker warnings.  It
doesn't change how the code works.

buf[] can either be BUF_SIZE if this is called from sysfs, or it can
be 16 if it's called from aac_get_adapter_info() via
aac_get_serial_number().  We use the smaller limit here.

sizeof(dev->supplement_adapter_info.MfgPcbaSerialNo) is 12 so there
is actually no chance of hitting either limit.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/scsi/aacraid/linit.c b/drivers/scsi/aacraid/linit.c
index 3382475..ea8d96e 100644
--- a/drivers/scsi/aacraid/linit.c
+++ b/drivers/scsi/aacraid/linit.c
@@ -894,15 +894,20 @@ static ssize_t aac_show_serial_number(struct device *device,
 	int len = 0;
 
 	if (le32_to_cpu(dev->adapter_info.serial[0]) != 0xBAD0)
-		len = snprintf(buf, PAGE_SIZE, "%06X\n",
+		len = snprintf(buf, 16, "%06X\n",
 		  le32_to_cpu(dev->adapter_info.serial[0]));
 	if (len &&
 	  !memcmp(&dev->supplement_adapter_info.MfgPcbaSerialNo[
 	    sizeof(dev->supplement_adapter_info.MfgPcbaSerialNo)-len],
 	  buf, len-1))
-		len = snprintf(buf, PAGE_SIZE, "%.*s\n",
+		len = snprintf(buf, 16, "%.*s\n",
 		  (int)sizeof(dev->supplement_adapter_info.MfgPcbaSerialNo),
 		  dev->supplement_adapter_info.MfgPcbaSerialNo);
+
+
+	if (len > 16)
+		len = 16;
+
 	return len;
 }
 
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