From: Jason A. Donenfeld <Jason@zx2c4.com>
Date: Sun, 4 Jun 2017 02:16:25 +0000 (+0200)
Subject: macsec: check return value of skb_to_sgvec always
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cda7ea690350;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

macsec: check return value of skb_to_sgvec always

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 91642fd87cd1..b79513b8322f 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -740,7 +740,12 @@ static struct sk_buff *macsec_encrypt(struct sk_buff *skb,
 	macsec_fill_iv(iv, secy->sci, pn);
 
 	sg_init_table(sg, ret);
-	skb_to_sgvec(skb, sg, 0, skb->len);
+	ret = skb_to_sgvec(skb, sg, 0, skb->len);
+	if (unlikely(ret < 0)) {
+		macsec_txsa_put(tx_sa);
+		kfree_skb(skb);
+		return ERR_PTR(ret);
+	}
 
 	if (tx_sc->encrypt) {
 		int len = skb->len - macsec_hdr_len(sci_present) -
@@ -947,7 +952,11 @@ static struct sk_buff *macsec_decrypt(struct sk_buff *skb,
 	macsec_fill_iv(iv, sci, ntohl(hdr->packet_number));
 
 	sg_init_table(sg, ret);
-	skb_to_sgvec(skb, sg, 0, skb->len);
+	ret = skb_to_sgvec(skb, sg, 0, skb->len);
+	if (unlikely(ret < 0)) {
+		kfree_skb(skb);
+		return ERR_PTR(ret);
+	}
 
 	if (hdr->tci_an & MACSEC_TCI_E) {
 		/* confidentiality: ethernet + macsec header