diff --git a/Grow.c b/Grow.c
index a8f6243..455c5f9 100755
--- a/Grow.c
+++ b/Grow.c
@@ -4048,8 +4048,10 @@ static int grow_backup(struct mdinfo *sra,
 			if (sd->disk.state & (1<<MD_DISK_FAULTY))
 				continue;
 			if (sd->disk.state & (1<<MD_DISK_SYNC)) {
-				char sbuf[20];
-				if (sysfs_get_str(sra, sd, "state", sbuf, 20) < 0 ||
+				char sbuf[100];
+
+				if (sysfs_get_str(sra, sd, "state",
+						  sbuf, sizeof(sbuf)) < 0 ||
 				    strstr(sbuf, "faulty") ||
 				    strstr(sbuf, "in_sync") == NULL) {
 					/* this device is dead */
diff --git a/monitor.c b/monitor.c
index 4c79ce2..3c554ab 100644
--- a/monitor.c
+++ b/monitor.c
@@ -131,8 +131,8 @@ static enum sync_action read_action( int fd)
 
 int read_dev_state(int fd)
 {
-	char buf[60];
-	int n = read_attr(buf, 60, fd);
+	char buf[100];
+	int n = read_attr(buf, sizeof(buf), fd);
 	char *cp;
 	int rv = 0;
 
diff --git a/super-intel.c b/super-intel.c
index 1f79eab..5740088 100644
--- a/super-intel.c
+++ b/super-intel.c
@@ -10708,9 +10708,10 @@ int check_degradation_change(struct mdinfo *info,
 			if (sd->disk.state & (1<<MD_DISK_FAULTY))
 				continue;
 			if (sd->disk.state & (1<<MD_DISK_SYNC)) {
-				char sbuf[20];
+				char sbuf[100];
+
 				if (sysfs_get_str(info,
-					sd, "state", sbuf, 20) < 0 ||
+					sd, "state", sbuf, sizeof(sbuf)) < 0 ||
 					strstr(sbuf, "faulty") ||
 					strstr(sbuf, "in_sync") == NULL) {
 					/* this device is dead */