From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
David.Laight@aculab.com, kernel-hardening@lists.openwall.com,
davem@davemloft.net
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
Subject: [PATCH v5 2/5] ipsec: check return value of skb_to_sgvec always
Date: Tue, 25 Apr 2017 17:52:12 +0200 [thread overview]
Message-ID: <20170425155215.4835-2-Jason@zx2c4.com> (raw)
In-Reply-To: <20170425155215.4835-1-Jason@zx2c4.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
net/ipv4/ah4.c | 8 ++++++--
net/ipv4/esp4.c | 30 ++++++++++++++++++++----------
net/ipv6/ah6.c | 8 ++++++--
net/ipv6/esp6.c | 31 +++++++++++++++++++++----------
4 files changed, 53 insertions(+), 24 deletions(-)
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 22377c8ff14b..e8f862358518 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 (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, 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 (unlikely(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 b1e24446e297..42cb09cc8533 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -360,9 +360,13 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
esph = esp_output_set_extra(skb, esph, extra);
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)) {
+ spin_unlock_bh(&x->lock);
+ goto error;
+ }
allocsize = ALIGN(skb->data_len, L1_CACHE_BYTES);
@@ -381,11 +385,13 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
pfrag->offset = pfrag->offset + allocsize;
sg_init_table(dsg, skb_shinfo(skb)->nr_frags + 1);
- skb_to_sgvec(skb, dsg,
- (unsigned char *)esph - skb->data,
- assoclen + ivlen + clen + alen);
+ err = skb_to_sgvec(skb, dsg,
+ (unsigned char *)esph - skb->data,
+ assoclen + ivlen + clen + alen);
spin_unlock_bh(&x->lock);
+ if (unlikely(err < 0))
+ goto error;
goto skip_cow2;
}
@@ -422,9 +428,11 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
esph = esp_output_set_extra(skb, esph, extra);
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;
skip_cow2:
if ((x->props.flags & XFRM_STATE_ESN))
@@ -658,7 +666,9 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
esp_input_set_header(skb, seqhi);
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;
skb->ip_summed = CHECKSUM_NONE;
diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index dda6035e3b84..755f38271dd5 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -423,7 +423,9 @@ static int ah6_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 (unlikely(err < 0))
+ goto out_free;
if (x->props.flags & XFRM_STATE_ESN) {
/* Attach seqhi sg right after packet payload */
@@ -606,7 +608,9 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
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 */
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index ff54faa75631..017e2c2d36e1 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -339,9 +339,13 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
esph = esp_output_set_esn(skb, esph, seqhi);
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)) {
+ spin_unlock_bh(&x->lock);
+ goto error;
+ }
allocsize = ALIGN(skb->data_len, L1_CACHE_BYTES);
@@ -360,12 +364,15 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
pfrag->offset = pfrag->offset + allocsize;
sg_init_table(dsg, skb_shinfo(skb)->nr_frags + 1);
- skb_to_sgvec(skb, dsg,
- (unsigned char *)esph - skb->data,
- assoclen + ivlen + clen + alen);
+ err = skb_to_sgvec(skb, dsg,
+ (unsigned char *)esph - skb->data,
+ assoclen + ivlen + clen + alen);
spin_unlock_bh(&x->lock);
+ if (unlikely(err < 0))
+ goto error;
+
goto skip_cow2;
}
}
@@ -403,9 +410,11 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
esph = esp_output_set_esn(skb, esph, seqhi);
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;
skip_cow2:
if ((x->props.flags & XFRM_STATE_ESN))
@@ -600,7 +609,9 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
esp_input_set_header(skb, seqhi);
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;
skb->ip_summed = CHECKSUM_NONE;
--
2.12.2
WARNING: multiple messages have this Message-ID (diff)
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
David.Laight@aculab.com, kernel-hardening@lists.openwall.com,
davem@davemloft.net
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>
Subject: [kernel-hardening] [PATCH v5 2/5] ipsec: check return value of skb_to_sgvec always
Date: Tue, 25 Apr 2017 17:52:12 +0200 [thread overview]
Message-ID: <20170425155215.4835-2-Jason@zx2c4.com> (raw)
In-Reply-To: <20170425155215.4835-1-Jason@zx2c4.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
---
net/ipv4/ah4.c | 8 ++++++--
net/ipv4/esp4.c | 30 ++++++++++++++++++++----------
net/ipv6/ah6.c | 8 ++++++--
net/ipv6/esp6.c | 31 +++++++++++++++++++++----------
4 files changed, 53 insertions(+), 24 deletions(-)
diff --git a/net/ipv4/ah4.c b/net/ipv4/ah4.c
index 22377c8ff14b..e8f862358518 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 (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, 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 (unlikely(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 b1e24446e297..42cb09cc8533 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -360,9 +360,13 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
esph = esp_output_set_extra(skb, esph, extra);
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)) {
+ spin_unlock_bh(&x->lock);
+ goto error;
+ }
allocsize = ALIGN(skb->data_len, L1_CACHE_BYTES);
@@ -381,11 +385,13 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
pfrag->offset = pfrag->offset + allocsize;
sg_init_table(dsg, skb_shinfo(skb)->nr_frags + 1);
- skb_to_sgvec(skb, dsg,
- (unsigned char *)esph - skb->data,
- assoclen + ivlen + clen + alen);
+ err = skb_to_sgvec(skb, dsg,
+ (unsigned char *)esph - skb->data,
+ assoclen + ivlen + clen + alen);
spin_unlock_bh(&x->lock);
+ if (unlikely(err < 0))
+ goto error;
goto skip_cow2;
}
@@ -422,9 +428,11 @@ static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
esph = esp_output_set_extra(skb, esph, extra);
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;
skip_cow2:
if ((x->props.flags & XFRM_STATE_ESN))
@@ -658,7 +666,9 @@ static int esp_input(struct xfrm_state *x, struct sk_buff *skb)
esp_input_set_header(skb, seqhi);
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;
skb->ip_summed = CHECKSUM_NONE;
diff --git a/net/ipv6/ah6.c b/net/ipv6/ah6.c
index dda6035e3b84..755f38271dd5 100644
--- a/net/ipv6/ah6.c
+++ b/net/ipv6/ah6.c
@@ -423,7 +423,9 @@ static int ah6_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 (unlikely(err < 0))
+ goto out_free;
if (x->props.flags & XFRM_STATE_ESN) {
/* Attach seqhi sg right after packet payload */
@@ -606,7 +608,9 @@ static int ah6_input(struct xfrm_state *x, struct sk_buff *skb)
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 */
diff --git a/net/ipv6/esp6.c b/net/ipv6/esp6.c
index ff54faa75631..017e2c2d36e1 100644
--- a/net/ipv6/esp6.c
+++ b/net/ipv6/esp6.c
@@ -339,9 +339,13 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
esph = esp_output_set_esn(skb, esph, seqhi);
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)) {
+ spin_unlock_bh(&x->lock);
+ goto error;
+ }
allocsize = ALIGN(skb->data_len, L1_CACHE_BYTES);
@@ -360,12 +364,15 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
pfrag->offset = pfrag->offset + allocsize;
sg_init_table(dsg, skb_shinfo(skb)->nr_frags + 1);
- skb_to_sgvec(skb, dsg,
- (unsigned char *)esph - skb->data,
- assoclen + ivlen + clen + alen);
+ err = skb_to_sgvec(skb, dsg,
+ (unsigned char *)esph - skb->data,
+ assoclen + ivlen + clen + alen);
spin_unlock_bh(&x->lock);
+ if (unlikely(err < 0))
+ goto error;
+
goto skip_cow2;
}
}
@@ -403,9 +410,11 @@ static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
esph = esp_output_set_esn(skb, esph, seqhi);
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;
skip_cow2:
if ((x->props.flags & XFRM_STATE_ESN))
@@ -600,7 +609,9 @@ static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
esp_input_set_header(skb, seqhi);
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;
skb->ip_summed = CHECKSUM_NONE;
--
2.12.2
next prev parent reply other threads:[~2017-04-25 15:52 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-25 14:08 [PATCH 1/5] skbuff: return -EMSGSIZE in skb_to_sgvec to prevent overflow Jason A. Donenfeld
2017-04-25 14:08 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 14:08 ` [PATCH 2/5] ipsec: check return value of skb_to_sgvec always Jason A. Donenfeld
2017-04-25 14:08 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 14:08 ` [PATCH 3/5] rxrpc: " Jason A. Donenfeld
2017-04-25 14:08 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 14:08 ` [PATCH 4/5] macsec: " Jason A. Donenfeld
2017-04-25 14:08 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 14:08 ` [PATCH 5/5] virtio_net: " Jason A. Donenfeld
2017-04-25 14:08 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 14:16 ` [PATCH v2 1/5] skbuff: return -EMSGSIZE in skb_to_sgvec to prevent overflow Jason A. Donenfeld
2017-04-25 14:16 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 14:21 ` [PATCH v3 " Jason A. Donenfeld
2017-04-25 14:21 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 14:47 ` [PATCH " David Miller
2017-04-25 14:47 ` [kernel-hardening] " David Miller
2017-04-25 15:04 ` [PATCH v4 " Jason A. Donenfeld
2017-04-25 15:04 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 15:17 ` David Miller
2017-04-25 15:17 ` [kernel-hardening] " David Miller
2017-04-25 15:52 ` [PATCH v5 " Jason A. Donenfeld
2017-04-25 15:52 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 15:52 ` Jason A. Donenfeld [this message]
2017-04-25 15:52 ` [kernel-hardening] [PATCH v5 2/5] ipsec: check return value of skb_to_sgvec always Jason A. Donenfeld
2017-04-25 15:52 ` [PATCH v5 3/5] rxrpc: " Jason A. Donenfeld
2017-04-25 15:52 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 15:52 ` [PATCH v5 4/5] macsec: " Jason A. Donenfeld
2017-04-25 15:52 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 15:52 ` [PATCH v5 5/5] virtio_net: " Jason A. Donenfeld
2017-04-25 15:52 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 18:47 ` [PATCH v6 1/5] skbuff: return -EMSGSIZE in skb_to_sgvec to prevent overflow Jason A. Donenfeld
2017-04-25 18:47 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 18:47 ` [PATCH v6 2/5] ipsec: check return value of skb_to_sgvec always Jason A. Donenfeld
2017-04-25 18:47 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 18:47 ` [PATCH v6 3/5] rxrpc: " Jason A. Donenfeld
2017-04-25 18:47 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-28 11:41 ` Sabrina Dubroca
2017-04-28 11:41 ` [kernel-hardening] " Sabrina Dubroca
2017-04-28 13:29 ` Jason A. Donenfeld
2017-04-28 13:29 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 18:47 ` [PATCH v6 4/5] macsec: " Jason A. Donenfeld
2017-04-25 18:47 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 18:47 ` [PATCH v6 5/5] virtio_net: " Jason A. Donenfeld
2017-04-25 18:47 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-27 9:21 ` [PATCH v6 1/5] skbuff: return -EMSGSIZE in skb_to_sgvec to prevent overflow Jason A. Donenfeld
2017-04-27 9:21 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-27 11:30 ` Sabrina Dubroca
2017-04-27 11:30 ` [kernel-hardening] " Sabrina Dubroca
2017-04-27 12:04 ` Jason A. Donenfeld
2017-04-27 12:04 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-27 14:54 ` David Laight
2017-04-27 14:54 ` [kernel-hardening] " David Laight
2017-04-27 14:54 ` David Laight
2017-04-27 15:54 ` David Miller
2017-04-27 15:54 ` [kernel-hardening] " David Miller
2017-04-28 16:18 ` Sabrina Dubroca
2017-04-28 16:18 ` [kernel-hardening] " Sabrina Dubroca
2017-04-28 22:47 ` Jason A. Donenfeld
2017-04-28 22:47 ` [kernel-hardening] " Jason A. Donenfeld
2017-04-25 15:42 ` [PATCH " Sergei Shtylyov
2017-04-25 15:42 ` [kernel-hardening] " Sergei Shtylyov
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