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ipsec-2023-08-15

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Merge tag 'ipsec-2023-08-15' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec

Steffen Klassert says:

====================
1) Fix a slab-out-of-bounds read in xfrm_address_filter.
   From Lin Ma.

2) Fix the pfkey sadb_x_filter validation.
   From Lin Ma.

3) Use the correct nla_policy structure for XFRMA_SEC_CTX.
   From Lin Ma.

4) Fix warnings triggerable by bad packets in the encap functions.
   From Herbert Xu.

5) Fix some slab-use-after-free in decode_session6.
   From Zhengchao Shao.

6) Fix a possible NULL piointer dereference in xfrm_update_ae_params.
   Lin Ma.

7) Add a forgotten nla_policy for XFRMA_MTIMER_THRESH.
   From Lin Ma.

8) Don't leak offloaded policies.
   From Leon Romanovsky.

9) Delete also the offloading part of an acquire state.
   From Leon Romanovsky.

Please pull or let me know if there are problems.
This commit is contained in:
David S. Miller 2023-08-16 08:57:41 +01:00
commit 5fc43ce03b
9 changed files with 34 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/net/xfrm.h
View File

@ -1984,6 +1984,7 @@ static inline void xfrm_dev_state_free(struct xfrm_state *x)
if (dev->xfrmdev_ops->xdo_dev_state_free)
dev->xfrmdev_ops->xdo_dev_state_free(x);
xso->dev = NULL;
xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED;
netdev_put(dev, &xso->dev_tracker);
}
}

4
net/ipv4/ip_vti.c
View File

@ -287,12 +287,12 @@ static netdev_tx_t vti_tunnel_xmit(struct sk_buff *skb, struct net_device *dev)
switch (skb->protocol) {
case htons(ETH_P_IP):
xfrm_decode_session(skb, &fl, AF_INET);
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
xfrm_decode_session(skb, &fl, AF_INET);
break;
case htons(ETH_P_IPV6):
xfrm_decode_session(skb, &fl, AF_INET6);
memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
xfrm_decode_session(skb, &fl, AF_INET6);
break;
default:
goto tx_err;

4
net/ipv6/ip6_vti.c
View File

@ -568,12 +568,12 @@ vti6_tnl_xmit(struct sk_buff *skb, struct net_device *dev)
vti6_addr_conflict(t, ipv6_hdr(skb)))
goto tx_err;
xfrm_decode_session(skb, &fl, AF_INET6);
memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
xfrm_decode_session(skb, &fl, AF_INET6);
break;
case htons(ETH_P_IP):
xfrm_decode_session(skb, &fl, AF_INET);
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
xfrm_decode_session(skb, &fl, AF_INET);
break;
default:
goto tx_err;

4
net/key/af_key.c
View File

@ -1848,9 +1848,9 @@ static int pfkey_dump(struct sock *sk, struct sk_buff *skb, const struct sadb_ms
if (ext_hdrs[SADB_X_EXT_FILTER - 1]) {
struct sadb_x_filter *xfilter = ext_hdrs[SADB_X_EXT_FILTER - 1];
if ((xfilter->sadb_x_filter_splen >=
if ((xfilter->sadb_x_filter_splen >
(sizeof(xfrm_address_t) << 3)) ||
(xfilter->sadb_x_filter_dplen >=
(xfilter->sadb_x_filter_dplen >
(sizeof(xfrm_address_t) << 3))) {
mutex_unlock(&pfk->dump_lock);
return -EINVAL;

2
net/xfrm/xfrm_compat.c
View File

@ -108,7 +108,7 @@ static const struct nla_policy compat_policy[XFRMA_MAX+1] = {
[XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
[XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
[XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
[XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
[XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_user_sec_ctx) },
[XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
[XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
[XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },

22
net/xfrm/xfrm_input.c
View File

@ -180,6 +180,8 @@ static int xfrm4_remove_beet_encap(struct xfrm_state *x, struct sk_buff *skb)
int optlen = 0;
int err = -EINVAL;
skb->protocol = htons(ETH_P_IP);
if (unlikely(XFRM_MODE_SKB_CB(skb)->protocol == IPPROTO_BEETPH)) {
struct ip_beet_phdr *ph;
int phlen;
@ -232,6 +234,8 @@ static int xfrm4_remove_tunnel_encap(struct xfrm_state *x, struct sk_buff *skb)
{
int err = -EINVAL;
skb->protocol = htons(ETH_P_IP);
if (!pskb_may_pull(skb, sizeof(struct iphdr)))
goto out;
@ -267,6 +271,8 @@ static int xfrm6_remove_tunnel_encap(struct xfrm_state *x, struct sk_buff *skb)
{
int err = -EINVAL;
skb->protocol = htons(ETH_P_IPV6);
if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
goto out;
@ -296,6 +302,8 @@ static int xfrm6_remove_beet_encap(struct xfrm_state *x, struct sk_buff *skb)
int size = sizeof(struct ipv6hdr);
int err;
skb->protocol = htons(ETH_P_IPV6);
err = skb_cow_head(skb, size + skb->mac_len);
if (err)
goto out;
@ -346,6 +354,7 @@ xfrm_inner_mode_encap_remove(struct xfrm_state *x,
return xfrm6_remove_tunnel_encap(x, skb);
break;
}
return -EINVAL;
}
WARN_ON_ONCE(1);
@ -366,19 +375,6 @@ static int xfrm_prepare_input(struct xfrm_state *x, struct sk_buff *skb)
return -EAFNOSUPPORT;
}
switch (XFRM_MODE_SKB_CB(skb)->protocol) {
case IPPROTO_IPIP:
case IPPROTO_BEETPH:
skb->protocol = htons(ETH_P_IP);
break;
case IPPROTO_IPV6:
skb->protocol = htons(ETH_P_IPV6);
break;
default:
WARN_ON_ONCE(1);
break;
}
return xfrm_inner_mode_encap_remove(x, skb);
}

4
net/xfrm/xfrm_interface_core.c
View File

@ -537,8 +537,8 @@ static netdev_tx_t xfrmi_xmit(struct sk_buff *skb, struct net_device *dev)
switch (skb->protocol) {
case htons(ETH_P_IPV6):
xfrm_decode_session(skb, &fl, AF_INET6);
memset(IP6CB(skb), 0, sizeof(*IP6CB(skb)));
xfrm_decode_session(skb, &fl, AF_INET6);
if (!dst) {
fl.u.ip6.flowi6_oif = dev->ifindex;
fl.u.ip6.flowi6_flags |= FLOWI_FLAG_ANYSRC;
@ -552,8 +552,8 @@ static netdev_tx_t xfrmi_xmit(struct sk_buff *skb, struct net_device *dev)
}
break;
case htons(ETH_P_IP):
xfrm_decode_session(skb, &fl, AF_INET);
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
xfrm_decode_session(skb, &fl, AF_INET);
if (!dst) {
struct rtable *rt;

8
net/xfrm/xfrm_state.c
View File

@ -1324,12 +1324,8 @@ xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr,
struct xfrm_dev_offload *xso = &x->xso;
if (xso->type == XFRM_DEV_OFFLOAD_PACKET) {
xso->dev->xfrmdev_ops->xdo_dev_state_delete(x);
xso->dir = 0;
netdev_put(xso->dev, &xso->dev_tracker);
xso->dev = NULL;
xso->real_dev = NULL;
xso->type = XFRM_DEV_OFFLOAD_UNSPECIFIED;
xfrm_dev_state_delete(x);
xfrm_dev_state_free(x);
}
#endif
x->km.state = XFRM_STATE_DEAD;

15
net/xfrm/xfrm_user.c
View File

@ -628,7 +628,7 @@ static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs,
struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH];
struct nlattr *mt = attrs[XFRMA_MTIMER_THRESH];
if (re) {
if (re && x->replay_esn && x->preplay_esn) {
struct xfrm_replay_state_esn *replay_esn;
replay_esn = nla_data(re);
memcpy(x->replay_esn, replay_esn,
@ -1267,6 +1267,15 @@ static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb)
sizeof(*filter), GFP_KERNEL);
if (filter == NULL)
return -ENOMEM;
/* see addr_match(), (prefix length >> 5) << 2
* will be used to compare xfrm_address_t
*/
if (filter->splen > (sizeof(xfrm_address_t) << 3) ||
filter->dplen > (sizeof(xfrm_address_t) << 3)) {
kfree(filter);
return -EINVAL;
}
}
if (attrs[XFRMA_PROTO])
@ -2336,6 +2345,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
NETLINK_CB(skb).portid);
}
} else {
xfrm_dev_policy_delete(xp);
xfrm_audit_policy_delete(xp, err ? 0 : 1, true);
if (err != 0)
@ -3015,7 +3025,7 @@ const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
[XFRMA_ALG_COMP] = { .len = sizeof(struct xfrm_algo) },
[XFRMA_ENCAP] = { .len = sizeof(struct xfrm_encap_tmpl) },
[XFRMA_TMPL] = { .len = sizeof(struct xfrm_user_tmpl) },
[XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_sec_ctx) },
[XFRMA_SEC_CTX] = { .len = sizeof(struct xfrm_user_sec_ctx) },
[XFRMA_LTIME_VAL] = { .len = sizeof(struct xfrm_lifetime_cur) },
[XFRMA_REPLAY_VAL] = { .len = sizeof(struct xfrm_replay_state) },
[XFRMA_REPLAY_THRESH] = { .type = NLA_U32 },
@ -3035,6 +3045,7 @@ const struct nla_policy xfrma_policy[XFRMA_MAX+1] = {
[XFRMA_SET_MARK] = { .type = NLA_U32 },
[XFRMA_SET_MARK_MASK] = { .type = NLA_U32 },
[XFRMA_IF_ID] = { .type = NLA_U32 },
[XFRMA_MTIMER_THRESH] = { .type = NLA_U32 },
};
EXPORT_SYMBOL_GPL(xfrma_policy);