From: NeilBrown <neilb@suse.de>
Date: Wed, 1 Sep 2010 06:14:26 +0000 (+1000)
Subject: intel: Don't try to read from tiny devices.
X-Git-Tag: mdadm-3.2~327
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=64436f0628a14f4e979b93bea57aba4b4c6143e8;p=thirdparty%2Fmdadm.git

intel: Don't try to read from tiny devices.

If a device is less than 1K, avoid even trying to seek to 1K before
the end.
The seek will fail anyway so this is a fairly cosmetic fix.

Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/super-intel.c b/super-intel.c
index b880a74c..f438044e 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -2199,6 +2199,13 @@ static int load_imsm_mpb(int fd, struct intel_super *super, char *devname)
 	__u32 check_sum;
 
 	get_dev_size(fd, NULL, &dsize);
+	if (dsize < 1024) {
+		if (devname)
+			fprintf(stderr,
+				Name ": %s: device to small for imsm\n",
+				devname);
+		return 1;
+	}
 
 	if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0) {
 		if (devname)