diff --git a/net/core/filter.c b/net/core/filter.c
index 303c0c44dc2c..c0fc9ff04bd5 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -3762,6 +3762,14 @@ static int bpf_skb_net_shrink(struct sk_buff *skb, u32 off, u32 len_diff,
 			return -ENOTSUPP;
 	}
 
+	/*
+	 * The MSS is raised by len_diff. It has 16 bits, and GSO_BY_FRAGS is
+	 * not a size.
+	 */
+	if (skb_is_gso(skb) && !(flags & BPF_F_ADJ_ROOM_FIXED_GSO) &&
+	    skb_shinfo(skb)->gso_size + len_diff >= GSO_BY_FRAGS)
+		return -ENOTSUPP;
+
 	ret = skb_unclone(skb, GFP_ATOMIC);
 	if (unlikely(ret < 0))
 		return ret;