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path: root/net/xfrm/xfrm_user.c
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Diffstat (limited to 'net/xfrm/xfrm_user.c')
-rw-r--r--net/xfrm/xfrm_user.c370
1 files changed, 250 insertions, 120 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 2ff017117730..e73f9efc54c1 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -35,7 +35,8 @@
#endif
#include <asm/unaligned.h>
-static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
+static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type,
+ struct netlink_ext_ack *extack)
{
struct nlattr *rt = attrs[type];
struct xfrm_algo *algp;
@@ -44,8 +45,10 @@ static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
return 0;
algp = nla_data(rt);
- if (nla_len(rt) < (int)xfrm_alg_len(algp))
+ if (nla_len(rt) < (int)xfrm_alg_len(algp)) {
+ NL_SET_ERR_MSG(extack, "Invalid AUTH/CRYPT/COMP attribute length");
return -EINVAL;
+ }
switch (type) {
case XFRMA_ALG_AUTH:
@@ -54,6 +57,7 @@ static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
break;
default:
+ NL_SET_ERR_MSG(extack, "Invalid algorithm attribute type");
return -EINVAL;
}
@@ -61,7 +65,8 @@ static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type)
return 0;
}
-static int verify_auth_trunc(struct nlattr **attrs)
+static int verify_auth_trunc(struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC];
struct xfrm_algo_auth *algp;
@@ -70,14 +75,16 @@ static int verify_auth_trunc(struct nlattr **attrs)
return 0;
algp = nla_data(rt);
- if (nla_len(rt) < (int)xfrm_alg_auth_len(algp))
+ if (nla_len(rt) < (int)xfrm_alg_auth_len(algp)) {
+ NL_SET_ERR_MSG(extack, "Invalid AUTH_TRUNC attribute length");
return -EINVAL;
+ }
algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
return 0;
}
-static int verify_aead(struct nlattr **attrs)
+static int verify_aead(struct nlattr **attrs, struct netlink_ext_ack *extack)
{
struct nlattr *rt = attrs[XFRMA_ALG_AEAD];
struct xfrm_algo_aead *algp;
@@ -86,8 +93,10 @@ static int verify_aead(struct nlattr **attrs)
return 0;
algp = nla_data(rt);
- if (nla_len(rt) < (int)aead_len(algp))
+ if (nla_len(rt) < (int)aead_len(algp)) {
+ NL_SET_ERR_MSG(extack, "Invalid AEAD attribute length");
return -EINVAL;
+ }
algp->alg_name[sizeof(algp->alg_name) - 1] = '\0';
return 0;
@@ -102,7 +111,7 @@ static void verify_one_addr(struct nlattr **attrs, enum xfrm_attr_type_t type,
*addrp = nla_data(rt);
}
-static inline int verify_sec_ctx_len(struct nlattr **attrs)
+static inline int verify_sec_ctx_len(struct nlattr **attrs, struct netlink_ext_ack *extack)
{
struct nlattr *rt = attrs[XFRMA_SEC_CTX];
struct xfrm_user_sec_ctx *uctx;
@@ -112,42 +121,59 @@ static inline int verify_sec_ctx_len(struct nlattr **attrs)
uctx = nla_data(rt);
if (uctx->len > nla_len(rt) ||
- uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len))
+ uctx->len != (sizeof(struct xfrm_user_sec_ctx) + uctx->ctx_len)) {
+ NL_SET_ERR_MSG(extack, "Invalid security context length");
return -EINVAL;
+ }
return 0;
}
static inline int verify_replay(struct xfrm_usersa_info *p,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL];
struct xfrm_replay_state_esn *rs;
- if (!rt)
- return (p->flags & XFRM_STATE_ESN) ? -EINVAL : 0;
+ if (!rt) {
+ if (p->flags & XFRM_STATE_ESN) {
+ NL_SET_ERR_MSG(extack, "Missing required attribute for ESN");
+ return -EINVAL;
+ }
+ return 0;
+ }
rs = nla_data(rt);
- if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8)
+ if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) {
+ NL_SET_ERR_MSG(extack, "ESN bitmap length must be <= 128");
return -EINVAL;
+ }
if (nla_len(rt) < (int)xfrm_replay_state_esn_len(rs) &&
- nla_len(rt) != sizeof(*rs))
+ nla_len(rt) != sizeof(*rs)) {
+ NL_SET_ERR_MSG(extack, "ESN attribute is too short to fit the full bitmap length");
return -EINVAL;
+ }
/* As only ESP and AH support ESN feature. */
- if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH))
+ if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) {
+ NL_SET_ERR_MSG(extack, "ESN only supported for ESP and AH");
return -EINVAL;
+ }
- if (p->replay_window != 0)
+ if (p->replay_window != 0) {
+ NL_SET_ERR_MSG(extack, "ESN not compatible with legacy replay_window");
return -EINVAL;
+ }
return 0;
}
static int verify_newsa_info(struct xfrm_usersa_info *p,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
int err;
@@ -161,10 +187,12 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
break;
#else
err = -EAFNOSUPPORT;
+ NL_SET_ERR_MSG(extack, "IPv6 support disabled");
goto out;
#endif
default:
+ NL_SET_ERR_MSG(extack, "Invalid address family");
goto out;
}
@@ -173,65 +201,98 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
break;
case AF_INET:
- if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
+ if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) {
+ NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)");
goto out;
+ }
break;
case AF_INET6:
#if IS_ENABLED(CONFIG_IPV6)
- if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
+ if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) {
+ NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)");
goto out;
+ }
break;
#else
+ NL_SET_ERR_MSG(extack, "IPv6 support disabled");
err = -EAFNOSUPPORT;
goto out;
#endif
default:
+ NL_SET_ERR_MSG(extack, "Invalid address family in selector");
goto out;
}
err = -EINVAL;
switch (p->id.proto) {
case IPPROTO_AH:
- if ((!attrs[XFRMA_ALG_AUTH] &&
- !attrs[XFRMA_ALG_AUTH_TRUNC]) ||
- attrs[XFRMA_ALG_AEAD] ||
+ if (!attrs[XFRMA_ALG_AUTH] &&
+ !attrs[XFRMA_ALG_AUTH_TRUNC]) {
+ NL_SET_ERR_MSG(extack, "Missing required attribute for AH: AUTH_TRUNC or AUTH");
+ goto out;
+ }
+
+ if (attrs[XFRMA_ALG_AEAD] ||
attrs[XFRMA_ALG_CRYPT] ||
attrs[XFRMA_ALG_COMP] ||
- attrs[XFRMA_TFCPAD])
+ attrs[XFRMA_TFCPAD]) {
+ NL_SET_ERR_MSG(extack, "Invalid attributes for AH: AEAD, CRYPT, COMP, TFCPAD");
goto out;
+ }
break;
case IPPROTO_ESP:
- if (attrs[XFRMA_ALG_COMP])
+ if (attrs[XFRMA_ALG_COMP]) {
+ NL_SET_ERR_MSG(extack, "Invalid attribute for ESP: COMP");
goto out;
+ }
+
if (!attrs[XFRMA_ALG_AUTH] &&
!attrs[XFRMA_ALG_AUTH_TRUNC] &&
!attrs[XFRMA_ALG_CRYPT] &&
- !attrs[XFRMA_ALG_AEAD])
+ !attrs[XFRMA_ALG_AEAD]) {
+ NL_SET_ERR_MSG(extack, "Missing required attribute for ESP: at least one of AUTH, AUTH_TRUNC, CRYPT, AEAD");
goto out;
+ }
+
if ((attrs[XFRMA_ALG_AUTH] ||
attrs[XFRMA_ALG_AUTH_TRUNC] ||
attrs[XFRMA_ALG_CRYPT]) &&
- attrs[XFRMA_ALG_AEAD])
+ attrs[XFRMA_ALG_AEAD]) {
+ NL_SET_ERR_MSG(extack, "Invalid attribute combination for ESP: AEAD can't be used with AUTH, AUTH_TRUNC, CRYPT");
goto out;
+ }
+
if (attrs[XFRMA_TFCPAD] &&
- p->mode != XFRM_MODE_TUNNEL)
+ p->mode != XFRM_MODE_TUNNEL) {
+ NL_SET_ERR_MSG(extack, "TFC padding can only be used in tunnel mode");
goto out;
+ }
break;
case IPPROTO_COMP:
- if (!attrs[XFRMA_ALG_COMP] ||
- attrs[XFRMA_ALG_AEAD] ||
+ if (!attrs[XFRMA_ALG_COMP]) {
+ NL_SET_ERR_MSG(extack, "Missing required attribute for COMP: COMP");
+ goto out;
+ }
+
+ if (attrs[XFRMA_ALG_AEAD] ||
attrs[XFRMA_ALG_AUTH] ||
attrs[XFRMA_ALG_AUTH_TRUNC] ||
attrs[XFRMA_ALG_CRYPT] ||
- attrs[XFRMA_TFCPAD] ||
- (ntohl(p->id.spi) >= 0x10000))
+ attrs[XFRMA_TFCPAD]) {
+ NL_SET_ERR_MSG(extack, "Invalid attributes for COMP: AEAD, AUTH, AUTH_TRUNC, CRYPT, TFCPAD");
goto out;
+ }
+
+ if (ntohl(p->id.spi) >= 0x10000) {
+ NL_SET_ERR_MSG(extack, "SPI is too large for COMP (must be < 0x10000)");
+ goto out;
+ }
break;
#if IS_ENABLED(CONFIG_IPV6)
@@ -244,29 +305,36 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
attrs[XFRMA_ALG_CRYPT] ||
attrs[XFRMA_ENCAP] ||
attrs[XFRMA_SEC_CTX] ||
- attrs[XFRMA_TFCPAD] ||
- !attrs[XFRMA_COADDR])
+ attrs[XFRMA_TFCPAD]) {
+ NL_SET_ERR_MSG(extack, "Invalid attributes for DSTOPTS/ROUTING");
goto out;
+ }
+
+ if (!attrs[XFRMA_COADDR]) {
+ NL_SET_ERR_MSG(extack, "Missing required COADDR attribute for DSTOPTS/ROUTING");
+ goto out;
+ }
break;
#endif
default:
+ NL_SET_ERR_MSG(extack, "Unsupported protocol");
goto out;
}
- if ((err = verify_aead(attrs)))
+ if ((err = verify_aead(attrs, extack)))
goto out;
- if ((err = verify_auth_trunc(attrs)))
+ if ((err = verify_auth_trunc(attrs, extack)))
goto out;
- if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH)))
+ if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH, extack)))
goto out;
- if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT)))
+ if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT, extack)))
goto out;
- if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP)))
+ if ((err = verify_one_alg(attrs, XFRMA_ALG_COMP, extack)))
goto out;
- if ((err = verify_sec_ctx_len(attrs)))
+ if ((err = verify_sec_ctx_len(attrs, extack)))
goto out;
- if ((err = verify_replay(p, attrs)))
+ if ((err = verify_replay(p, attrs, extack)))
goto out;
err = -EINVAL;
@@ -278,14 +346,19 @@ static int verify_newsa_info(struct xfrm_usersa_info *p,
break;
default:
+ NL_SET_ERR_MSG(extack, "Unsupported mode");
goto out;
}
err = 0;
- if (attrs[XFRMA_MTIMER_THRESH])
- if (!attrs[XFRMA_ENCAP])
+ if (attrs[XFRMA_MTIMER_THRESH]) {
+ if (!attrs[XFRMA_ENCAP]) {
+ NL_SET_ERR_MSG(extack, "MTIMER_THRESH attribute can only be set on ENCAP states");
err = -EINVAL;
+ goto out;
+ }
+ }
out:
return err;
@@ -293,7 +366,7 @@ out:
static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
struct xfrm_algo_desc *(*get_byname)(const char *, int),
- struct nlattr *rta)
+ struct nlattr *rta, struct netlink_ext_ack *extack)
{
struct xfrm_algo *p, *ualg;
struct xfrm_algo_desc *algo;
@@ -304,8 +377,10 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
ualg = nla_data(rta);
algo = get_byname(ualg->alg_name, 1);
- if (!algo)
+ if (!algo) {
+ NL_SET_ERR_MSG(extack, "Requested COMP algorithm not found");
return -ENOSYS;
+ }
*props = algo->desc.sadb_alg_id;
p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
@@ -317,7 +392,8 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props,
return 0;
}
-static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
+static int attach_crypt(struct xfrm_state *x, struct nlattr *rta,
+ struct netlink_ext_ack *extack)
{
struct xfrm_algo *p, *ualg;
struct xfrm_algo_desc *algo;
@@ -328,8 +404,10 @@ static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
ualg = nla_data(rta);
algo = xfrm_ealg_get_byname(ualg->alg_name, 1);
- if (!algo)
+ if (!algo) {
+ NL_SET_ERR_MSG(extack, "Requested CRYPT algorithm not found");
return -ENOSYS;
+ }
x->props.ealgo = algo->desc.sadb_alg_id;
p = kmemdup(ualg, xfrm_alg_len(ualg), GFP_KERNEL);
@@ -343,7 +421,7 @@ static int attach_crypt(struct xfrm_state *x, struct nlattr *rta)
}
static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
- struct nlattr *rta)
+ struct nlattr *rta, struct netlink_ext_ack *extack)
{
struct xfrm_algo *ualg;
struct xfrm_algo_auth *p;
@@ -355,8 +433,10 @@ static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
ualg = nla_data(rta);
algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
- if (!algo)
+ if (!algo) {
+ NL_SET_ERR_MSG(extack, "Requested AUTH algorithm not found");
return -ENOSYS;
+ }
*props = algo->desc.sadb_alg_id;
p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL);
@@ -373,7 +453,7 @@ static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props,
}
static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
- struct nlattr *rta)
+ struct nlattr *rta, struct netlink_ext_ack *extack)
{
struct xfrm_algo_auth *p, *ualg;
struct xfrm_algo_desc *algo;
@@ -384,10 +464,14 @@ static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
ualg = nla_data(rta);
algo = xfrm_aalg_get_byname(ualg->alg_name, 1);
- if (!algo)
+ if (!algo) {
+ NL_SET_ERR_MSG(extack, "Requested AUTH_TRUNC algorithm not found");
return -ENOSYS;
- if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits)
+ }
+ if (ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) {
+ NL_SET_ERR_MSG(extack, "Invalid length requested for truncated ICV");
return -EINVAL;
+ }
*props = algo->desc.sadb_alg_id;
p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL);
@@ -402,7 +486,8 @@ static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props,
return 0;
}
-static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
+static int attach_aead(struct xfrm_state *x, struct nlattr *rta,
+ struct netlink_ext_ack *extack)
{
struct xfrm_algo_aead *p, *ualg;
struct xfrm_algo_desc *algo;
@@ -413,8 +498,10 @@ static int attach_aead(struct xfrm_state *x, struct nlattr *rta)
ualg = nla_data(rta);
algo = xfrm_aead_get_byname(ualg->alg_name, ualg->alg_icv_len, 1);
- if (!algo)
+ if (!algo) {
+ NL_SET_ERR_MSG(extack, "Requested AEAD algorithm not found");
return -ENOSYS;
+ }
x->props.ealgo = algo->desc.sadb_alg_id;
p = kmemdup(ualg, aead_len(ualg), GFP_KERNEL);
@@ -579,7 +666,8 @@ static void xfrm_smark_init(struct nlattr **attrs, struct xfrm_mark *m)
static struct xfrm_state *xfrm_state_construct(struct net *net,
struct xfrm_usersa_info *p,
struct nlattr **attrs,
- int *errp)
+ int *errp,
+ struct netlink_ext_ack *extack)
{
struct xfrm_state *x = xfrm_state_alloc(net);
int err = -ENOMEM;
@@ -606,21 +694,21 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
if (attrs[XFRMA_SA_EXTRA_FLAGS])
x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]);
- if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD])))
+ if ((err = attach_aead(x, attrs[XFRMA_ALG_AEAD], extack)))
goto error;
if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo,
- attrs[XFRMA_ALG_AUTH_TRUNC])))
+ attrs[XFRMA_ALG_AUTH_TRUNC], extack)))
goto error;
if (!x->props.aalgo) {
if ((err = attach_auth(&x->aalg, &x->props.aalgo,
- attrs[XFRMA_ALG_AUTH])))
+ attrs[XFRMA_ALG_AUTH], extack)))
goto error;
}
- if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT])))
+ if ((err = attach_crypt(x, attrs[XFRMA_ALG_CRYPT], extack)))
goto error;
if ((err = attach_one_algo(&x->calg, &x->props.calgo,
xfrm_calg_get_byname,
- attrs[XFRMA_ALG_COMP])))
+ attrs[XFRMA_ALG_COMP], extack)))
goto error;
if (attrs[XFRMA_TFCPAD])
@@ -633,7 +721,7 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
if (attrs[XFRMA_IF_ID])
x->if_id = nla_get_u32(attrs[XFRMA_IF_ID]);
- err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV]);
+ err = __xfrm_init_state(x, false, attrs[XFRMA_OFFLOAD_DEV], extack);
if (err)
goto error;
@@ -653,7 +741,7 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
/* sysctl_xfrm_aevent_etime is in 100ms units */
x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M;
- if ((err = xfrm_init_replay(x)))
+ if ((err = xfrm_init_replay(x, extack)))
goto error;
/* override default values from above */
@@ -662,7 +750,8 @@ static struct xfrm_state *xfrm_state_construct(struct net *net,
/* configure the hardware if offload is requested */
if (attrs[XFRMA_OFFLOAD_DEV]) {
err = xfrm_dev_state_add(net, x,
- nla_data(attrs[XFRMA_OFFLOAD_DEV]));
+ nla_data(attrs[XFRMA_OFFLOAD_DEV]),
+ extack);
if (err)
goto error;
}
@@ -678,7 +767,7 @@ error_no_put:
}
static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs, struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_usersa_info *p = nlmsg_data(nlh);
@@ -686,11 +775,11 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
int err;
struct km_event c;
- err = verify_newsa_info(p, attrs);
+ err = verify_newsa_info(p, attrs, extack);
if (err)
return err;
- x = xfrm_state_construct(net, p, attrs, &err);
+ x = xfrm_state_construct(net, p, attrs, &err, extack);
if (!x)
return err;
@@ -757,7 +846,7 @@ static struct xfrm_state *xfrm_user_state_lookup(struct net *net,
}
static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs, struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_state *x;
@@ -1254,7 +1343,8 @@ static int build_spdinfo(struct sk_buff *skb, struct net *net,
}
static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrmu_spdhthresh *thresh4 = NULL;
@@ -1299,7 +1389,8 @@ static int xfrm_set_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
}
static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct sk_buff *r_skb;
@@ -1358,7 +1449,8 @@ static int build_sadinfo(struct sk_buff *skb, struct net *net,
}
static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct sk_buff *r_skb;
@@ -1378,7 +1470,7 @@ static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh,
}
static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs, struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_usersa_id *p = nlmsg_data(nlh);
@@ -1402,7 +1494,8 @@ out_noput:
}
static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_state *x;
@@ -1477,7 +1570,7 @@ out_noput:
return err;
}
-static int verify_policy_dir(u8 dir)
+static int verify_policy_dir(u8 dir, struct netlink_ext_ack *extack)
{
switch (dir) {
case XFRM_POLICY_IN:
@@ -1486,13 +1579,14 @@ static int verify_policy_dir(u8 dir)
break;
default:
+ NL_SET_ERR_MSG(extack, "Invalid policy direction");
return -EINVAL;
}
return 0;
}
-static int verify_policy_type(u8 type)
+static int verify_policy_type(u8 type, struct netlink_ext_ack *extack)
{
switch (type) {
case XFRM_POLICY_TYPE_MAIN:
@@ -1502,13 +1596,15 @@ static int verify_policy_type(u8 type)
break;
default:
+ NL_SET_ERR_MSG(extack, "Invalid policy type");
return -EINVAL;
}
return 0;
}
-static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
+static int verify_newpolicy_info(struct xfrm_userpolicy_info *p,
+ struct netlink_ext_ack *extack)
{
int ret;
@@ -1520,6 +1616,7 @@ static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
break;
default:
+ NL_SET_ERR_MSG(extack, "Invalid policy share");
return -EINVAL;
}
@@ -1529,35 +1626,44 @@ static int verify_newpolicy_info(struct xfrm_userpolicy_info *p)
break;
default:
+ NL_SET_ERR_MSG(extack, "Invalid policy action");
return -EINVAL;
}
switch (p->sel.family) {
case AF_INET:
- if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32)
+ if (p->sel.prefixlen_d > 32 || p->sel.prefixlen_s > 32) {
+ NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 32 for IPv4)");
return -EINVAL;
+ }
break;
case AF_INET6:
#if IS_ENABLED(CONFIG_IPV6)
- if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128)
+ if (p->sel.prefixlen_d > 128 || p->sel.prefixlen_s > 128) {
+ NL_SET_ERR_MSG(extack, "Invalid prefix length in selector (must be <= 128 for IPv6)");
return -EINVAL;
+ }
break;
#else
+ NL_SET_ERR_MSG(extack, "IPv6 support disabled");
return -EAFNOSUPPORT;
#endif
default:
+ NL_SET_ERR_MSG(extack, "Invalid selector family");
return -EINVAL;
}
- ret = verify_policy_dir(p->dir);
+ ret = verify_policy_dir(p->dir, extack);
if (ret)
return ret;
- if (p->index && (xfrm_policy_id2dir(p->index) != p->dir))
+ if (p->index && (xfrm_policy_id2dir(p->index) != p->dir)) {
+ NL_SET_ERR_MSG(extack, "Policy index doesn't match direction");
return -EINVAL;
+ }
return 0;
}
@@ -1599,13 +1705,16 @@ static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut,
}
}
-static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
+static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family,
+ struct netlink_ext_ack *extack)
{
u16 prev_family;
int i;
- if (nr > XFRM_MAX_DEPTH)
+ if (nr > XFRM_MAX_DEPTH) {
+ NL_SET_ERR_MSG(extack, "Template count must be <= XFRM_MAX_DEPTH (" __stringify(XFRM_MAX_DEPTH) ")");
return -EINVAL;
+ }
prev_family = family;
@@ -1625,12 +1734,16 @@ static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
case XFRM_MODE_BEET:
break;
default:
- if (ut[i].family != prev_family)
+ if (ut[i].family != prev_family) {
+ NL_SET_ERR_MSG(extack, "Mode in template doesn't support a family change");
return -EINVAL;
+ }
break;
}
- if (ut[i].mode >= XFRM_MODE_MAX)
+ if (ut[i].mode >= XFRM_MODE_MAX) {
+ NL_SET_ERR_MSG(extack, "Mode in template must be < XFRM_MODE_MAX (" __stringify(XFRM_MODE_MAX) ")");
return -EINVAL;
+ }
prev_family = ut[i].family;
@@ -1642,17 +1755,21 @@ static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family)
break;
#endif
default:
+ NL_SET_ERR_MSG(extack, "Invalid family in template");
return -EINVAL;
}
- if (!xfrm_id_proto_valid(ut[i].id.proto))
+ if (!xfrm_id_proto_valid(ut[i].id.proto)) {
+ NL_SET_ERR_MSG(extack, "Invalid XFRM protocol in template");
return -EINVAL;
+ }
}
return 0;
}
-static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
+static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct nlattr *rt = attrs[XFRMA_TMPL];
@@ -1663,7 +1780,7 @@ static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
int nr = nla_len(rt) / sizeof(*utmpl);
int err;
- err = validate_tmpl(nr, utmpl, pol->family);
+ err = validate_tmpl(nr, utmpl, pol->family, extack);
if (err)
return err;
@@ -1672,7 +1789,8 @@ static int copy_from_user_tmpl(struct xfrm_policy *pol, struct nlattr **attrs)
return 0;
}
-static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
+static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct nlattr *rt = attrs[XFRMA_POLICY_TYPE];
struct xfrm_userpolicy_type *upt;
@@ -1684,7 +1802,7 @@ static int copy_from_user_policy_type(u8 *tp, struct nlattr **attrs)
type = upt->type;
}
- err = verify_policy_type(type);
+ err = verify_policy_type(type, extack);
if (err)
return err;
@@ -1719,7 +1837,11 @@ static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_i
p->share = XFRM_SHARE_ANY; /* XXX xp->share */
}
-static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_userpolicy_info *p, struct nlattr **attrs, int *errp)
+static struct xfrm_policy *xfrm_policy_construct(struct net *net,
+ struct xfrm_userpolicy_info *p,
+ struct nlattr **attrs,
+ int *errp,
+ struct netlink_ext_ack *extack)
{
struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL);
int err;
@@ -1731,11 +1853,11 @@ static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_us
copy_from_user_policy(xp, p);
- err = copy_from_user_policy_type(&xp->type, attrs);
+ err = copy_from_user_policy_type(&xp->type, attrs, extack);
if (err)
goto error;
- if (!(err = copy_from_user_tmpl(xp, attrs)))
+ if (!(err = copy_from_user_tmpl(xp, attrs, extack)))
err = copy_from_user_sec_ctx(xp, attrs);
if (err)
goto error;
@@ -1754,7 +1876,8 @@ static struct xfrm_policy *xfrm_policy_construct(struct net *net, struct xfrm_us
}
static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_userpolicy_info *p = nlmsg_data(nlh);
@@ -1763,14 +1886,14 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
int err;
int excl;
- err = verify_newpolicy_info(p);
+ err = verify_newpolicy_info(p, extack);
if (err)
return err;
- err = verify_sec_ctx_len(attrs);
+ err = verify_sec_ctx_len(attrs, extack);
if (err)
return err;
- xp = xfrm_policy_construct(net, p, attrs, &err);
+ xp = xfrm_policy_construct(net, p, attrs, &err, extack);
if (!xp)
return err;
@@ -2015,7 +2138,7 @@ static bool xfrm_userpolicy_is_valid(__u8 policy)
}
static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs, struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_userpolicy_default *up = nlmsg_data(nlh);
@@ -2036,7 +2159,7 @@ static int xfrm_set_default(struct sk_buff *skb, struct nlmsghdr *nlh,
}
static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs, struct netlink_ext_ack *extack)
{
struct sk_buff *r_skb;
struct nlmsghdr *r_nlh;
@@ -2066,7 +2189,8 @@ static int xfrm_get_default(struct sk_buff *skb, struct nlmsghdr *nlh,
}
static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_policy *xp;
@@ -2081,11 +2205,11 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
p = nlmsg_data(nlh);
delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY;
- err = copy_from_user_policy_type(&type, attrs);
+ err = copy_from_user_policy_type(&type, attrs, extack);
if (err)
return err;
- err = verify_policy_dir(p->dir);
+ err = verify_policy_dir(p->dir, extack);
if (err)
return err;
@@ -2101,7 +2225,7 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
struct nlattr *rt = attrs[XFRMA_SEC_CTX];
struct xfrm_sec_ctx *ctx;
- err = verify_sec_ctx_len(attrs);
+ err = verify_sec_ctx_len(attrs, extack);
if (err)
return err;
@@ -2149,7 +2273,8 @@ out:
}
static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct km_event c;
@@ -2249,7 +2374,7 @@ out_cancel:
}
static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs, struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_state *x;
@@ -2293,7 +2418,7 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
}
static int xfrm_new_ae(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs, struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_state *x;
@@ -2344,14 +2469,15 @@ out:
}
static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct km_event c;
u8 type = XFRM_POLICY_TYPE_MAIN;
int err;
- err = copy_from_user_policy_type(&type, attrs);
+ err = copy_from_user_policy_type(&type, attrs, extack);
if (err)
return err;
@@ -2372,7 +2498,8 @@ static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh,
}
static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_policy *xp;
@@ -2383,11 +2510,11 @@ static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
struct xfrm_mark m;
u32 if_id = 0;
- err = copy_from_user_policy_type(&type, attrs);
+ err = copy_from_user_policy_type(&type, attrs, extack);
if (err)
return err;
- err = verify_policy_dir(p->dir);
+ err = verify_policy_dir(p->dir, extack);
if (err)
return err;
@@ -2403,7 +2530,7 @@ static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
struct nlattr *rt = attrs[XFRMA_SEC_CTX];
struct xfrm_sec_ctx *ctx;
- err = verify_sec_ctx_len(attrs);
+ err = verify_sec_ctx_len(attrs, extack);
if (err)
return err;
@@ -2438,7 +2565,8 @@ out:
}
static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_state *x;
@@ -2472,7 +2600,8 @@ out:
}
static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs,
+ struct netlink_ext_ack *extack)
{
struct net *net = sock_net(skb->sk);
struct xfrm_policy *xp;
@@ -2490,15 +2619,15 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh,
xfrm_mark_get(attrs, &mark);
- err = verify_newpolicy_info(&ua->policy);
+ err = verify_newpolicy_info(&ua->policy, extack);
if (err)
goto free_state;
- err = verify_sec_ctx_len(attrs);
+ err = verify_sec_ctx_len(attrs, extack);
if (err)
goto free_state;
/* build an XP */
- xp = xfrm_policy_construct(net, &ua->policy, attrs, &err);
+ xp = xfrm_policy_construct(net, &ua->policy, attrs, &err, extack);
if (!xp)
goto free_state;
@@ -2577,7 +2706,7 @@ static int copy_from_user_migrate(struct xfrm_migrate *ma,
}
static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs, struct netlink_ext_ack *extack)
{
struct xfrm_userpolicy_id *pi = nlmsg_data(nlh);
struct xfrm_migrate m[XFRM_MAX_DEPTH];
@@ -2594,7 +2723,7 @@ static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL;
- err = copy_from_user_policy_type(&type, attrs);
+ err = copy_from_user_policy_type(&type, attrs, extack);
if (err)
return err;
@@ -2623,7 +2752,7 @@ static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
}
#else
static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh,
- struct nlattr **attrs)
+ struct nlattr **attrs, struct netlink_ext_ack *extack)
{
return -ENOPROTOOPT;
}
@@ -2819,7 +2948,8 @@ static const struct nla_policy xfrma_spd_policy[XFRMA_SPD_MAX+1] = {
};
static const struct xfrm_link {
- int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **);
+ int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **,
+ struct netlink_ext_ack *);
int (*start)(struct netlink_callback *);
int (*dump)(struct sk_buff *, struct netlink_callback *);
int (*done)(struct netlink_callback *);
@@ -2921,7 +3051,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh,
goto err;
}
- err = link->doit(skb, nlh, attrs);
+ err = link->doit(skb, nlh, attrs, extack);
/* We need to free skb allocated in xfrm_alloc_compat() before
* returning from this function, because consume_skb() won't take
@@ -3272,11 +3402,11 @@ static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt,
*dir = -EINVAL;
if (len < sizeof(*p) ||
- verify_newpolicy_info(p))
+ verify_newpolicy_info(p, NULL))
return NULL;
nr = ((len - sizeof(*p)) / sizeof(*ut));
- if (validate_tmpl(nr, ut, p->sel.family))
+ if (validate_tmpl(nr, ut, p->sel.family, NULL))
return NULL;
if (p->dir > XFRM_POLICY_OUT)
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-15 00:04:32 +0300