From: Dan Williams <dan.j.williams@intel.com>
Date: Wed, 25 Feb 2009 01:45:56 +0000 (-0700)
Subject: imsm: verify single sector mpb checksums
X-Git-Tag: mdadm-3.0-devel3~31
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ecf45690f2f4316b308eca3fd54af78a7c945726;p=thirdparty%2Fmdadm.git

imsm: verify single sector mpb checksums

If the mpb is only one sector do not skip the checksum verification.

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---

diff --git a/super-intel.c b/super-intel.c
index 388ada1a..3f83255a 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -1779,6 +1779,17 @@ static int load_imsm_mpb(int fd, struct intel_super *super, char *devname)
 	sectors = mpb_sectors(anchor) - 1;
 	free(anchor);
 	if (!sectors) {
+		check_sum = __gen_imsm_checksum(super->anchor);
+		if (check_sum != __le32_to_cpu(super->anchor->check_sum)) {
+			if (devname)
+				fprintf(stderr,
+					Name ": IMSM checksum %x != %x on %s\n",
+					check_sum,
+					__le32_to_cpu(super->anchor->check_sum),
+					devname);
+			return 2;
+		}
+
 		rc = load_imsm_disk(fd, super, devname, 0);
 		if (rc == 0)
 			rc = parse_raid_devices(super);