From: NeilBrown <neilb@suse.de>
Date: Mon, 22 Oct 2012 21:48:00 +0000 (+1100)
Subject: super0: allow creation of array on 2TB+ devices.
X-Git-Tag: mdadm-3.3-rc1~168
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=63ebe78faefc47ce8612b619bb25b3438cf8378b;p=thirdparty%2Fmdadm.git

super0: allow creation of array on 2TB+ devices.

As 'info->size' is signed, it cannot even hold values above
2TB.
But it isn't used much.  sb->size is the important value and it
is unsigned.
So use that to check for overflow of size.

Reported-by: Eugene San <eugenesan@gmail.com>
---

diff --git a/super0.c b/super0.c
index eb902ebd..ecb6b382 100644
--- a/super0.c
+++ b/super0.c
@@ -638,9 +638,9 @@ static int init_super0(struct supertype *st, mdu_array_info_t *info,
 	sb->gvalid_words = 0; /* ignored */
 	sb->ctime = time(0);
 	sb->level = info->level;
-	if (size != (unsigned long long)info->size)
+	sb->size = size;
+	if (size != (unsigned long long)sb->size)
 		return 0;
-	sb->size = info->size;
 	sb->nr_disks = info->nr_disks;
 	sb->raid_disks = info->raid_disks;
 	sb->md_minor = info->md_minor;