diff --git a/sys/geom/raid/md_ddf.c b/sys/geom/raid/md_ddf.c
index 0a3ec663733..d4ceae34344 100644
--- a/sys/geom/raid/md_ddf.c
+++ b/sys/geom/raid/md_ddf.c
@@ -1046,8 +1046,11 @@ ddf_meta_read(struct g_consumer *cp, struct ddf_meta *meta)
 	uint32_t val;
 
 	ddf_meta_free(meta);
+
 	pp = cp->provider;
 	ss = meta->sectorsize = pp->sectorsize;
+	if (ss < sizeof(*hdr))
+		return (ENXIO);
 	/* Read anchor block. */
 	abuf = g_read_data(cp, pp->mediasize - ss, ss, &error);
 	if (abuf == NULL) {
diff --git a/sys/geom/raid/md_intel.c b/sys/geom/raid/md_intel.c
index 80ec182c53b..54fa7535bc0 100644
--- a/sys/geom/raid/md_intel.c
+++ b/sys/geom/raid/md_intel.c
@@ -593,7 +593,8 @@ intel_meta_read(struct g_consumer *cp)
 	uint32_t checksum, *ptr;
 
 	pp = cp->provider;
-
+	if (pp->sectorsize < sizeof(*meta))
+		return (NULL);
 	/* Read the anchor sector. */
 	buf = g_read_data(cp,
 	    pp->mediasize - pp->sectorsize * 2, pp->sectorsize, &error);
diff --git a/sys/geom/raid/md_jmicron.c b/sys/geom/raid/md_jmicron.c
index d0387bef4de..02da9e1f02a 100644
--- a/sys/geom/raid/md_jmicron.c
+++ b/sys/geom/raid/md_jmicron.c
@@ -270,7 +270,8 @@ jmicron_meta_read(struct g_consumer *cp)
 	uint16_t checksum, *ptr;
 
 	pp = cp->provider;
-
+	if (pp->sectorsize < sizeof(*meta))
+		return (NULL);
 	/* Read the anchor sector. */
 	buf = g_read_data(cp,
 	    pp->mediasize - pp->sectorsize, pp->sectorsize, &error);
diff --git a/sys/geom/raid/md_nvidia.c b/sys/geom/raid/md_nvidia.c
index 1c758df5157..79ec18fe17d 100644
--- a/sys/geom/raid/md_nvidia.c
+++ b/sys/geom/raid/md_nvidia.c
@@ -250,7 +250,8 @@ nvidia_meta_read(struct g_consumer *cp)
 	uint32_t checksum, *ptr;
 
 	pp = cp->provider;
-
+	if (pp->sectorsize < sizeof(*meta))
+		return (NULL);
 	/* Read the anchor sector. */
 	buf = g_read_data(cp,
 	    pp->mediasize - 2 * pp->sectorsize, pp->sectorsize, &error);
diff --git a/sys/geom/raid/md_promise.c b/sys/geom/raid/md_promise.c
index aacf0106ea1..dc9f444f2ac 100644
--- a/sys/geom/raid/md_promise.c
+++ b/sys/geom/raid/md_promise.c
@@ -344,6 +344,8 @@ promise_meta_read(struct g_consumer *cp, struct promise_raid_conf **metaarr)
 	pp = cp->provider;
 	subdisks = 0;
 
+	if (pp->sectorsize * 4 < sizeof(*meta))
+		return (subdisks);
 	if (pp->sectorsize * 4 > maxphys) {
 		G_RAID_DEBUG(1, "%s: Blocksize is too big.", pp->name);
 		return (subdisks);
diff --git a/sys/geom/raid/md_sii.c b/sys/geom/raid/md_sii.c
index c8de0c8db8e..06d58d45fe3 100644
--- a/sys/geom/raid/md_sii.c
+++ b/sys/geom/raid/md_sii.c
@@ -271,7 +271,8 @@ sii_meta_read(struct g_consumer *cp)
 	uint16_t checksum, *ptr;
 
 	pp = cp->provider;
-
+	if (pp->sectorsize < sizeof(*meta))
+		return (NULL);
 	/* Read the anchor sector. */
 	buf = g_read_data(cp,
 	    pp->mediasize - pp->sectorsize, pp->sectorsize, &error);