unblock_monitor(): Check sra is valid before dereferencing

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

1 files changed, 2 insertions, 0 deletions

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))