diff --git a/[refs] b/[refs]
index ff0827aedb82..83dd7183eb63 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 9f864c80913467312c7b8690e41fb5ebd1b50e92
+refs/heads/master: f3f63c1c28bc861a931fac283b5bc3585efb8967
diff --git a/trunk/fs/bio.c b/trunk/fs/bio.c
index 8abb2dfb2e7c..8317a2c106bc 100644
--- a/trunk/fs/bio.c
+++ b/trunk/fs/bio.c
@@ -370,6 +370,9 @@ struct bio *bio_kmalloc(gfp_t gfp_mask, int nr_iovecs)
 {
 	struct bio *bio;
 
+	if (nr_iovecs > UIO_MAXIOV)
+		return NULL;
+
 	bio = kmalloc(sizeof(struct bio) + nr_iovecs * sizeof(struct bio_vec),
 		      gfp_mask);
 	if (unlikely(!bio))
@@ -697,8 +700,12 @@ static void bio_free_map_data(struct bio_map_data *bmd)
 static struct bio_map_data *bio_alloc_map_data(int nr_segs, int iov_count,
 					       gfp_t gfp_mask)
 {
-	struct bio_map_data *bmd = kmalloc(sizeof(*bmd), gfp_mask);
+	struct bio_map_data *bmd;
+
+	if (iov_count > UIO_MAXIOV)
+		return NULL;
 
+	bmd = kmalloc(sizeof(*bmd), gfp_mask);
 	if (!bmd)
 		return NULL;