From: Jes Sorensen <Jes.Sorensen@redhat.com>
Date: Wed, 2 Nov 2011 21:09:19 +0000 (+1100)
Subject: unblock_monitor(): Check sra is valid before dereferencing
X-Git-Tag: mdadm-3.2.3~68
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=29b59ca5c3b8d9c0385efbed232a9820ed9fe58e;p=thirdparty%2Fmdadm.git

unblock_monitor(): Check sra is valid before dereferencing

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/msg.c b/msg.c
index 87d3b8d6..dc780b3e 100644
--- a/msg.c
+++ b/msg.c
@@ -448,6 +448,8 @@ void unblock_monitor(char *container, const int unfreeze)
 			continue;
 		sysfs_free(sra);
 		sra = sysfs_read(-1, e->devnum, GET_VERSION|GET_LEVEL);
+		if (!sra)
+			continue;
 		if (sra->array.level > 0)
 			to_ping++;
 		if (unblock_subarray(sra, unfreeze))