[linux-yocto] [PATCH 5/5] net/ipv4: Check the Return Code of skb_to_sgvec()

[Daniel Dragomir]

From: John Jacques <john.jacq...@intel.com>

Signed-off-by: John Jacques <john.jacq...@intel.com>
---
 net/ipv4/ah4.c  |  8 ++++++--
 net/ipv4/esp4.c | 13 +++++++++----
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 0157f09..339f28a 100644
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -220,7 +220,9 @@ static int ah_output(struct xfrm_state *x, struct sk_buff 
*skb)
        ah->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
 
        sg_init_table(sg, nfrags + sglists);
-       skb_to_sgvec_nomark(skb, sg, 0, skb->len);
+       err = skb_to_sgvec_nomark(skb, sg, 0, skb->len);
+       if (err < 0)
+               goto out_free;
 
        if (x->props.flags & XFRM_STATE_ESN) {
                /* Attach seqhi sg right after packet payload */
@@ -391,7 +393,9 @@ static int ah_input(struct xfrm_state *x, struct sk_buff 
*skb)
        skb_push(skb, ihl);
 
        sg_init_table(sg, nfrags + sglists);
-       skb_to_sgvec_nomark(skb, sg, 0, skb->len);
+       err = skb_to_sgvec_nomark(skb, sg, 0, skb->len);
+       if (err < 0)
+               goto out_free;
 
        if (x->props.flags & XFRM_STATE_ESN) {
                /* Attach seqhi sg right after packet payload */
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 30b544f..3edef57 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -239,9 +239,11 @@ static int esp_output(struct xfrm_state *x, struct sk_buff 
*skb)
        esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
 
        sg_init_table(sg, nfrags);
-       skb_to_sgvec(skb, sg,
-                    esph->enc_data + crypto_aead_ivsize(aead) - skb->data,
-                    clen + alen);
+       err = skb_to_sgvec(skb, sg,
+                          esph->enc_data + crypto_aead_ivsize(aead) - 
skb->data,
+                          clen + alen);
+       if (err < 0)
+               goto error;
 
        if ((x->props.flags & XFRM_STATE_ESN)) {
                sg_init_table(asg, 3);
@@ -429,7 +431,10 @@ static int esp_input(struct xfrm_state *x, struct sk_buff 
*skb)
        iv = esph->enc_data;
 
        sg_init_table(sg, nfrags);
-       skb_to_sgvec(skb, sg, sizeof(*esph) + crypto_aead_ivsize(aead), elen);
+       err = skb_to_sgvec(skb, sg,
+                          sizeof(*esph) + crypto_aead_ivsize(aead), elen);
+       if (err < 0)
+               goto out;
 
        if ((x->props.flags & XFRM_STATE_ESN)) {
                sg_init_table(asg, 3);
-- 
2.7.4

-- 
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