This is a note to let you know that I've just added the patch titled
ipsec: check return value of skb_to_sgvec always
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ipsec-check-return-value-of-skb_to_sgvec-always.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3f29770723fe498a5c5f57c3a31a996ebdde03e1 Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@xxxxxxxxx>
Date: Sun, 4 Jun 2017 04:16:23 +0200
Subject: ipsec: check return value of skb_to_sgvec always
From: Jason A. Donenfeld <Jason@xxxxxxxxx>
commit 3f29770723fe498a5c5f57c3a31a996ebdde03e1 upstream.
Signed-off-by: Jason A. Donenfeld <Jason@xxxxxxxxx>
Cc: Steffen Klassert <steffen.klassert@xxxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
[natechancellor: Adjusted context due to lack of fca11ebde3f0]
Signed-off-by: Nathan Chancellor <natechancellor@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv4/ah4.c | 8 ++++++--
net/ipv4/esp4.c | 13 ++++++++-----
net/ipv6/ah6.c | 8 ++++++--
net/ipv6/esp6.c | 12 ++++++++----
4 files changed, 28 insertions(+), 13 deletions(-)
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -220,7 +220,9 @@ static int ah_output(struct xfrm_state *
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 (unlikely(err < 0))
+ goto out_free;
if (x->props.flags & XFRM_STATE_ESN) {
/* Attach seqhi sg right after packet payload */
@@ -393,7 +395,9 @@ static int ah_input(struct xfrm_state *x
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 (unlikely(err < 0))
+ goto out_free;
if (x->props.flags & XFRM_STATE_ESN) {
/* Attach seqhi sg right after packet payload */
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -268,10 +268,11 @@ static int esp_output(struct xfrm_state
esph->spi = x->id.spi;
sg_init_table(sg, nfrags);
- skb_to_sgvec(skb, sg,
- (unsigned char *)esph - skb->data,
- assoclen + ivlen + clen + alen);
-
+ err = skb_to_sgvec(skb, sg,
+ (unsigned char *)esph - skb->data,
+ assoclen + ivlen + clen + alen);
+ if (unlikely(err < 0))
+ goto error;
aead_request_set_crypt(req, sg, sg, ivlen + clen, iv);
aead_request_set_ad(req, assoclen);
@@ -481,7 +482,9 @@ static int esp_input(struct xfrm_state *
}
sg_init_table(sg, nfrags);
- skb_to_sgvec(skb, sg, 0, skb->len);
+ err = skb_to_sgvec(skb, sg, 0, skb->len);
+ if (unlikely(err < 0))
+ goto out;
aead_request_set_crypt(req, sg, sg, elen + ivlen, iv);
aead_request_set_ad(req, assoclen);
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -423,7 +423,9 @@ static int ah6_output(struct xfrm_state
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 (unlikely(err < 0))
+ goto out_free;
if (x->props.flags & XFRM_STATE_ESN) {
/* Attach seqhi sg right after packet payload */
@@ -603,7 +605,9 @@ static int ah6_input(struct xfrm_state *
ip6h->hop_limit = 0;
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 (unlikely(err < 0))
+ goto out_free;
if (x->props.flags & XFRM_STATE_ESN) {
/* Attach seqhi sg right after packet payload */
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -248,9 +248,11 @@ static int esp6_output(struct xfrm_state
esph->spi = x->id.spi;
sg_init_table(sg, nfrags);
- skb_to_sgvec(skb, sg,
- (unsigned char *)esph - skb->data,
- assoclen + ivlen + clen + alen);
+ err = skb_to_sgvec(skb, sg,
+ (unsigned char *)esph - skb->data,
+ assoclen + ivlen + clen + alen);
+ if (unlikely(err < 0))
+ goto error;
aead_request_set_crypt(req, sg, sg, ivlen + clen, iv);
aead_request_set_ad(req, assoclen);
@@ -423,7 +425,9 @@ static int esp6_input(struct xfrm_state
}
sg_init_table(sg, nfrags);
- skb_to_sgvec(skb, sg, 0, skb->len);
+ ret = skb_to_sgvec(skb, sg, 0, skb->len);
+ if (unlikely(ret < 0))
+ goto out;
aead_request_set_crypt(req, sg, sg, elen + ivlen, iv);
aead_request_set_ad(req, assoclen);
Patches currently in stable-queue which might be from Jason@xxxxxxxxx are
queue-4.4/ipsec-check-return-value-of-skb_to_sgvec-always.patch
queue-4.4/skbuff-return-emsgsize-in-skb_to_sgvec-to-prevent-overflow.patch
queue-4.4/rxrpc-check-return-value-of-skb_to_sgvec-always.patch
queue-4.4/virtio_net-check-return-value-of-skb_to_sgvec-always.patch
queue-4.4/virtio_net-check-return-value-of-skb_to_sgvec-in-one-more-location.patch