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Subject[PATCH AUTOSEL for 4.9 196/281] macsec: check return value of skb_to_sgvec always
Date
From: "Jason A. Donenfeld" <Jason@zx2c4.com>

[ Upstream commit cda7ea6903502af34015000e16be290a79f07638 ]

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Cc: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
---
drivers/net/macsec.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/drivers/net/macsec.c b/drivers/net/macsec.c
index 2caac0c37059..365a48cfcbbf 100644
--- a/drivers/net/macsec.c
+++ b/drivers/net/macsec.c
@@ -742,7 +742,12 @@ 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) -
@@ -949,7 +954,11 @@ 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
--
2.14.1
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