diff options
Diffstat (limited to 'net/xfrm/xfrm_user.c')
| -rw-r--r-- | net/xfrm/xfrm_user.c | 1418 |
1 files changed, 990 insertions, 428 deletions
diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c index 5d96f2728dc..d4db6ebb089 100644 --- a/net/xfrm/xfrm_user.c +++ b/net/xfrm/xfrm_user.c @@ -26,16 +26,12 @@ #include <net/sock.h> #include <net/xfrm.h> #include <net/netlink.h> +#include <net/ah.h> #include <asm/uaccess.h> -#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) +#if IS_ENABLED(CONFIG_IPV6) #include <linux/in6.h> #endif -static inline int aead_len(struct xfrm_algo_aead *alg) -{ - return sizeof(*alg) + ((alg->alg_key_len + 7) / 8); -} - static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) { struct nlattr *rt = attrs[type]; @@ -50,19 +46,8 @@ static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) switch (type) { case XFRMA_ALG_AUTH: - if (!algp->alg_key_len && - strcmp(algp->alg_name, "digest_null") != 0) - return -EINVAL; - break; - case XFRMA_ALG_CRYPT: - if (!algp->alg_key_len && - strcmp(algp->alg_name, "cipher_null") != 0) - return -EINVAL; - break; - case XFRMA_ALG_COMP: - /* Zero length keys are legal. */ break; default: @@ -73,6 +58,22 @@ static int verify_one_alg(struct nlattr **attrs, enum xfrm_attr_type_t type) return 0; } +static int verify_auth_trunc(struct nlattr **attrs) +{ + struct nlattr *rt = attrs[XFRMA_ALG_AUTH_TRUNC]; + struct xfrm_algo_auth *algp; + + if (!rt) + return 0; + + algp = nla_data(rt); + if (nla_len(rt) < xfrm_alg_auth_len(algp)) + return -EINVAL; + + algp->alg_name[CRYPTO_MAX_ALG_NAME - 1] = '\0'; + return 0; +} + static int verify_aead(struct nlattr **attrs) { struct nlattr *rt = attrs[XFRMA_ALG_AEAD]; @@ -113,6 +114,38 @@ static inline int verify_sec_ctx_len(struct nlattr **attrs) return 0; } +static inline int verify_replay(struct xfrm_usersa_info *p, + struct nlattr **attrs) +{ + struct nlattr *rt = attrs[XFRMA_REPLAY_ESN_VAL]; + struct xfrm_replay_state_esn *rs; + + if (p->flags & XFRM_STATE_ESN) { + if (!rt) + return -EINVAL; + + rs = nla_data(rt); + + if (rs->bmp_len > XFRMA_REPLAY_ESN_MAX / sizeof(rs->bmp[0]) / 8) + return -EINVAL; + + if (nla_len(rt) < xfrm_replay_state_esn_len(rs) && + nla_len(rt) != sizeof(*rs)) + return -EINVAL; + } + + if (!rt) + return 0; + + /* As only ESP and AH support ESN feature. */ + if ((p->id.proto != IPPROTO_ESP) && (p->id.proto != IPPROTO_AH)) + return -EINVAL; + + if (p->replay_window != 0) + return -EINVAL; + + return 0; +} static int verify_newsa_info(struct xfrm_usersa_info *p, struct nlattr **attrs) @@ -125,7 +158,7 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, break; case AF_INET6: -#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) +#if IS_ENABLED(CONFIG_IPV6) break; #else err = -EAFNOSUPPORT; @@ -139,10 +172,12 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, err = -EINVAL; switch (p->id.proto) { case IPPROTO_AH: - if (!attrs[XFRMA_ALG_AUTH] || + if ((!attrs[XFRMA_ALG_AUTH] && + !attrs[XFRMA_ALG_AUTH_TRUNC]) || attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_CRYPT] || - attrs[XFRMA_ALG_COMP]) + attrs[XFRMA_ALG_COMP] || + attrs[XFRMA_TFCPAD]) goto out; break; @@ -150,32 +185,42 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, if (attrs[XFRMA_ALG_COMP]) goto out; if (!attrs[XFRMA_ALG_AUTH] && + !attrs[XFRMA_ALG_AUTH_TRUNC] && !attrs[XFRMA_ALG_CRYPT] && !attrs[XFRMA_ALG_AEAD]) goto out; if ((attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_AUTH_TRUNC] || attrs[XFRMA_ALG_CRYPT]) && attrs[XFRMA_ALG_AEAD]) goto out; + if (attrs[XFRMA_TFCPAD] && + p->mode != XFRM_MODE_TUNNEL) + goto out; break; case IPPROTO_COMP: if (!attrs[XFRMA_ALG_COMP] || attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_AUTH] || - attrs[XFRMA_ALG_CRYPT]) + attrs[XFRMA_ALG_AUTH_TRUNC] || + attrs[XFRMA_ALG_CRYPT] || + attrs[XFRMA_TFCPAD] || + (ntohl(p->id.spi) >= 0x10000)) goto out; break; -#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) +#if IS_ENABLED(CONFIG_IPV6) case IPPROTO_DSTOPTS: case IPPROTO_ROUTING: if (attrs[XFRMA_ALG_COMP] || attrs[XFRMA_ALG_AUTH] || + attrs[XFRMA_ALG_AUTH_TRUNC] || attrs[XFRMA_ALG_AEAD] || attrs[XFRMA_ALG_CRYPT] || attrs[XFRMA_ENCAP] || attrs[XFRMA_SEC_CTX] || + attrs[XFRMA_TFCPAD] || !attrs[XFRMA_COADDR]) goto out; break; @@ -187,6 +232,8 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, if ((err = verify_aead(attrs))) goto out; + if ((err = verify_auth_trunc(attrs))) + goto out; if ((err = verify_one_alg(attrs, XFRMA_ALG_AUTH))) goto out; if ((err = verify_one_alg(attrs, XFRMA_ALG_CRYPT))) @@ -195,6 +242,8 @@ static int verify_newsa_info(struct xfrm_usersa_info *p, goto out; if ((err = verify_sec_ctx_len(attrs))) goto out; + if ((err = verify_replay(p, attrs))) + goto out; err = -EINVAL; switch (p->mode) { @@ -215,7 +264,7 @@ out: } static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, - struct xfrm_algo_desc *(*get_byname)(char *, int), + struct xfrm_algo_desc *(*get_byname)(const char *, int), struct nlattr *rta) { struct xfrm_algo *p, *ualg; @@ -240,6 +289,67 @@ static int attach_one_algo(struct xfrm_algo **algpp, u8 *props, return 0; } +static int attach_auth(struct xfrm_algo_auth **algpp, u8 *props, + struct nlattr *rta) +{ + struct xfrm_algo *ualg; + struct xfrm_algo_auth *p; + struct xfrm_algo_desc *algo; + + if (!rta) + return 0; + + ualg = nla_data(rta); + + algo = xfrm_aalg_get_byname(ualg->alg_name, 1); + if (!algo) + return -ENOSYS; + *props = algo->desc.sadb_alg_id; + + p = kmalloc(sizeof(*p) + (ualg->alg_key_len + 7) / 8, GFP_KERNEL); + if (!p) + return -ENOMEM; + + strcpy(p->alg_name, algo->name); + p->alg_key_len = ualg->alg_key_len; + p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; + memcpy(p->alg_key, ualg->alg_key, (ualg->alg_key_len + 7) / 8); + + *algpp = p; + return 0; +} + +static int attach_auth_trunc(struct xfrm_algo_auth **algpp, u8 *props, + struct nlattr *rta) +{ + struct xfrm_algo_auth *p, *ualg; + struct xfrm_algo_desc *algo; + + if (!rta) + return 0; + + ualg = nla_data(rta); + + algo = xfrm_aalg_get_byname(ualg->alg_name, 1); + if (!algo) + return -ENOSYS; + if ((ualg->alg_trunc_len / 8) > MAX_AH_AUTH_LEN || + ualg->alg_trunc_len > algo->uinfo.auth.icv_fullbits) + return -EINVAL; + *props = algo->desc.sadb_alg_id; + + p = kmemdup(ualg, xfrm_alg_auth_len(ualg), GFP_KERNEL); + if (!p) + return -ENOMEM; + + strcpy(p->alg_name, algo->name); + if (!p->alg_trunc_len) + p->alg_trunc_len = algo->uinfo.auth.icv_truncbits; + + *algpp = p; + return 0; +} + static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, struct nlattr *rta) { @@ -265,6 +375,57 @@ static int attach_aead(struct xfrm_algo_aead **algpp, u8 *props, return 0; } +static inline int xfrm_replay_verify_len(struct xfrm_replay_state_esn *replay_esn, + struct nlattr *rp) +{ + struct xfrm_replay_state_esn *up; + int ulen; + + if (!replay_esn || !rp) + return 0; + + up = nla_data(rp); + ulen = xfrm_replay_state_esn_len(up); + + if (nla_len(rp) < ulen || xfrm_replay_state_esn_len(replay_esn) != ulen) + return -EINVAL; + + return 0; +} + +static int xfrm_alloc_replay_state_esn(struct xfrm_replay_state_esn **replay_esn, + struct xfrm_replay_state_esn **preplay_esn, + struct nlattr *rta) +{ + struct xfrm_replay_state_esn *p, *pp, *up; + int klen, ulen; + + if (!rta) + return 0; + + up = nla_data(rta); + klen = xfrm_replay_state_esn_len(up); + ulen = nla_len(rta) >= klen ? klen : sizeof(*up); + + p = kzalloc(klen, GFP_KERNEL); + if (!p) + return -ENOMEM; + + pp = kzalloc(klen, GFP_KERNEL); + if (!pp) { + kfree(p); + return -ENOMEM; + } + + memcpy(p, up, ulen); + memcpy(pp, up, ulen); + + *replay_esn = p; + *preplay_esn = pp; + + return 0; +} + static inline int xfrm_user_sec_ctx_size(struct xfrm_sec_ctx *xfrm_ctx) { int len = 0; @@ -282,15 +443,15 @@ static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info * memcpy(&x->sel, &p->sel, sizeof(x->sel)); memcpy(&x->lft, &p->lft, sizeof(x->lft)); x->props.mode = p->mode; - x->props.replay_window = p->replay_window; + x->props.replay_window = min_t(unsigned int, p->replay_window, + sizeof(x->replay.bitmap) * 8); x->props.reqid = p->reqid; x->props.family = p->family; memcpy(&x->props.saddr, &p->saddr, sizeof(x->props.saddr)); x->props.flags = p->flags; - if (x->props.mode == XFRM_MODE_TRANSPORT) + if (!x->sel.family && !(p->flags & XFRM_STATE_AF_UNSPEC)) x->sel.family = p->family; - } /* @@ -298,13 +459,24 @@ static void copy_from_user_state(struct xfrm_state *x, struct xfrm_usersa_info * * somehow made shareable and move it to xfrm_state.c - JHS * */ -static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) +static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs, + int update_esn) { struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; + struct nlattr *re = update_esn ? attrs[XFRMA_REPLAY_ESN_VAL] : NULL; struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; struct nlattr *et = attrs[XFRMA_ETIMER_THRESH]; struct nlattr *rt = attrs[XFRMA_REPLAY_THRESH]; + if (re) { + struct xfrm_replay_state_esn *replay_esn; + replay_esn = nla_data(re); + memcpy(x->replay_esn, replay_esn, + xfrm_replay_state_esn_len(replay_esn)); + memcpy(x->preplay_esn, replay_esn, + xfrm_replay_state_esn_len(replay_esn)); + } + if (rp) { struct xfrm_replay_state *replay; replay = nla_data(rp); @@ -328,11 +500,12 @@ static void xfrm_update_ae_params(struct xfrm_state *x, struct nlattr **attrs) x->replay_maxdiff = nla_get_u32(rt); } -static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, +static struct xfrm_state *xfrm_state_construct(struct net *net, + struct xfrm_usersa_info *p, struct nlattr **attrs, int *errp) { - struct xfrm_state *x = xfrm_state_alloc(); + struct xfrm_state *x = xfrm_state_alloc(net); int err = -ENOMEM; if (!x) @@ -340,13 +513,20 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, copy_from_user_state(x, p); + if (attrs[XFRMA_SA_EXTRA_FLAGS]) + x->props.extra_flags = nla_get_u32(attrs[XFRMA_SA_EXTRA_FLAGS]); + if ((err = attach_aead(&x->aead, &x->props.ealgo, attrs[XFRMA_ALG_AEAD]))) goto error; - if ((err = attach_one_algo(&x->aalg, &x->props.aalgo, - xfrm_aalg_get_byname, - attrs[XFRMA_ALG_AUTH]))) + if ((err = attach_auth_trunc(&x->aalg, &x->props.aalgo, + attrs[XFRMA_ALG_AUTH_TRUNC]))) goto error; + if (!x->props.aalgo) { + if ((err = attach_auth(&x->aalg, &x->props.aalgo, + attrs[XFRMA_ALG_AUTH]))) + goto error; + } if ((err = attach_one_algo(&x->ealg, &x->props.ealgo, xfrm_ealg_get_byname, attrs[XFRMA_ALG_CRYPT]))) @@ -363,6 +543,9 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, goto error; } + if (attrs[XFRMA_TFCPAD]) + x->tfcpad = nla_get_u32(attrs[XFRMA_TFCPAD]); + if (attrs[XFRMA_COADDR]) { x->coaddr = kmemdup(nla_data(attrs[XFRMA_COADDR]), sizeof(*x->coaddr), GFP_KERNEL); @@ -370,7 +553,9 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, goto error; } - err = xfrm_init_state(x); + xfrm_mark_get(attrs, &x->mark); + + err = __xfrm_init_state(x, false); if (err) goto error; @@ -378,17 +563,20 @@ static struct xfrm_state *xfrm_state_construct(struct xfrm_usersa_info *p, security_xfrm_state_alloc(x, nla_data(attrs[XFRMA_SEC_CTX]))) goto error; + if ((err = xfrm_alloc_replay_state_esn(&x->replay_esn, &x->preplay_esn, + attrs[XFRMA_REPLAY_ESN_VAL]))) + goto error; + x->km.seq = p->seq; - x->replay_maxdiff = sysctl_xfrm_aevent_rseqth; + x->replay_maxdiff = net->xfrm.sysctl_aevent_rseqth; /* sysctl_xfrm_aevent_etime is in 100ms units */ - x->replay_maxage = (sysctl_xfrm_aevent_etime*HZ)/XFRM_AE_ETH_M; - x->preplay.bitmap = 0; - x->preplay.seq = x->replay.seq+x->replay_maxdiff; - x->preplay.oseq = x->replay.oseq +x->replay_maxdiff; + x->replay_maxage = (net->xfrm.sysctl_aevent_etime*HZ)/XFRM_AE_ETH_M; - /* override default values from above */ + if ((err = xfrm_init_replay(x))) + goto error; - xfrm_update_ae_params(x, attrs); + /* override default values from above */ + xfrm_update_ae_params(x, attrs, 0); return x; @@ -403,6 +591,7 @@ error_no_put: static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_usersa_info *p = nlmsg_data(nlh); struct xfrm_state *x; int err; @@ -412,7 +601,7 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, if (err) return err; - x = xfrm_state_construct(p, attrs, &err); + x = xfrm_state_construct(net, p, attrs, &err); if (!x) return err; @@ -422,8 +611,7 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, else err = xfrm_state_update(x); - xfrm_audit_state_add(x, err ? 0 : 1, NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + xfrm_audit_state_add(x, err ? 0 : 1, true); if (err < 0) { x->km.state = XFRM_STATE_DEAD; @@ -432,7 +620,7 @@ static int xfrm_add_sa(struct sk_buff *skb, struct nlmsghdr *nlh, } c.seq = nlh->nlmsg_seq; - c.pid = nlh->nlmsg_pid; + c.portid = nlh->nlmsg_pid; c.event = nlh->nlmsg_type; km_state_notify(x, &c); @@ -441,16 +629,19 @@ out: return err; } -static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, +static struct xfrm_state *xfrm_user_state_lookup(struct net *net, + struct xfrm_usersa_id *p, struct nlattr **attrs, int *errp) { struct xfrm_state *x = NULL; + struct xfrm_mark m; int err; + u32 mark = xfrm_mark_get(attrs, &m); if (xfrm_id_proto_match(p->proto, IPSEC_PROTO_ANY)) { err = -ESRCH; - x = xfrm_state_lookup(&p->daddr, p->spi, p->proto, p->family); + x = xfrm_state_lookup(net, mark, &p->daddr, p->spi, p->proto, p->family); } else { xfrm_address_t *saddr = NULL; @@ -461,8 +652,9 @@ static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, } err = -ESRCH; - x = xfrm_state_lookup_byaddr(&p->daddr, saddr, p->proto, - p->family); + x = xfrm_state_lookup_byaddr(net, mark, + &p->daddr, saddr, + p->proto, p->family); } out: @@ -474,12 +666,13 @@ static struct xfrm_state *xfrm_user_state_lookup(struct xfrm_usersa_id *p, static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_state *x; int err = -ESRCH; struct km_event c; struct xfrm_usersa_id *p = nlmsg_data(nlh); - x = xfrm_user_state_lookup(p, attrs, &err); + x = xfrm_user_state_lookup(net, p, attrs, &err); if (x == NULL) return err; @@ -497,19 +690,19 @@ static int xfrm_del_sa(struct sk_buff *skb, struct nlmsghdr *nlh, goto out; c.seq = nlh->nlmsg_seq; - c.pid = nlh->nlmsg_pid; + c.portid = nlh->nlmsg_pid; c.event = nlh->nlmsg_type; km_state_notify(x, &c); out: - xfrm_audit_state_delete(x, err ? 0 : 1, NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + xfrm_audit_state_delete(x, err ? 0 : 1, true); xfrm_state_put(x); return err; } static void copy_to_user_state(struct xfrm_state *x, struct xfrm_usersa_info *p) { + memset(p, 0, sizeof(*p)); memcpy(&p->id, &x->id, sizeof(p->id)); memcpy(&p->sel, &x->sel, sizeof(p->sel)); memcpy(&p->lft, &x->lft, sizeof(p->lft)); @@ -529,8 +722,6 @@ struct xfrm_dump_info { struct sk_buff *out_skb; u32 nlmsg_seq; u16 nlmsg_flags; - int start_idx; - int this_idx; }; static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) @@ -554,38 +745,97 @@ static int copy_sec_ctx(struct xfrm_sec_ctx *s, struct sk_buff *skb) return 0; } -/* Don't change this without updating xfrm_sa_len! */ -static int copy_to_user_state_extra(struct xfrm_state *x, - struct xfrm_usersa_info *p, - struct sk_buff *skb) +static int copy_to_user_auth(struct xfrm_algo_auth *auth, struct sk_buff *skb) { - copy_to_user_state(x, p); + struct xfrm_algo *algo; + struct nlattr *nla; - if (x->coaddr) - NLA_PUT(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); + nla = nla_reserve(skb, XFRMA_ALG_AUTH, + sizeof(*algo) + (auth->alg_key_len + 7) / 8); + if (!nla) + return -EMSGSIZE; - if (x->lastused) - NLA_PUT_U64(skb, XFRMA_LASTUSED, x->lastused); + algo = nla_data(nla); + strncpy(algo->alg_name, auth->alg_name, sizeof(algo->alg_name)); + memcpy(algo->alg_key, auth->alg_key, (auth->alg_key_len + 7) / 8); + algo->alg_key_len = auth->alg_key_len; - if (x->aead) - NLA_PUT(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); - if (x->aalg) - NLA_PUT(skb, XFRMA_ALG_AUTH, xfrm_alg_len(x->aalg), x->aalg); - if (x->ealg) - NLA_PUT(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); - if (x->calg) - NLA_PUT(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); + return 0; +} - if (x->encap) - NLA_PUT(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); +/* Don't change this without updating xfrm_sa_len! */ +static int copy_to_user_state_extra(struct xfrm_state *x, + struct xfrm_usersa_info *p, + struct sk_buff *skb) +{ + int ret = 0; - if (x->security && copy_sec_ctx(x->security, skb) < 0) - goto nla_put_failure; + copy_to_user_state(x, p); - return 0; + if (x->props.extra_flags) { + ret = nla_put_u32(skb, XFRMA_SA_EXTRA_FLAGS, + x->props.extra_flags); + if (ret) + goto out; + } -nla_put_failure: - return -EMSGSIZE; + if (x->coaddr) { + ret = nla_put(skb, XFRMA_COADDR, sizeof(*x->coaddr), x->coaddr); + if (ret) + goto out; + } + if (x->lastused) { + ret = nla_put_u64(skb, XFRMA_LASTUSED, x->lastused); + if (ret) + goto out; + } + if (x->aead) { + ret = nla_put(skb, XFRMA_ALG_AEAD, aead_len(x->aead), x->aead); + if (ret) + goto out; + } + if (x->aalg) { + ret = copy_to_user_auth(x->aalg, skb); + if (!ret) + ret = nla_put(skb, XFRMA_ALG_AUTH_TRUNC, + xfrm_alg_auth_len(x->aalg), x->aalg); + if (ret) + goto out; + } + if (x->ealg) { + ret = nla_put(skb, XFRMA_ALG_CRYPT, xfrm_alg_len(x->ealg), x->ealg); + if (ret) + goto out; + } + if (x->calg) { + ret = nla_put(skb, XFRMA_ALG_COMP, sizeof(*(x->calg)), x->calg); + if (ret) + goto out; + } + if (x->encap) { + ret = nla_put(skb, XFRMA_ENCAP, sizeof(*x->encap), x->encap); + if (ret) + goto out; + } + if (x->tfcpad) { + ret = nla_put_u32(skb, XFRMA_TFCPAD, x->tfcpad); + if (ret) + goto out; + } + ret = xfrm_mark_put(skb, &x->mark); + if (ret) + goto out; + if (x->replay_esn) { + ret = nla_put(skb, XFRMA_REPLAY_ESN_VAL, + xfrm_replay_state_esn_len(x->replay_esn), + x->replay_esn); + if (ret) + goto out; + } + if (x->security) + ret = copy_sec_ctx(x->security, skb); +out: + return ret; } static int dump_one_state(struct xfrm_state *x, int count, void *ptr) @@ -597,10 +847,7 @@ static int dump_one_state(struct xfrm_state *x, int count, void *ptr) struct nlmsghdr *nlh; int err; - if (sp->this_idx < sp->start_idx) - goto out; - - nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, + nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, XFRM_MSG_NEWSA, sizeof(*p), sp->nlmsg_flags); if (nlh == NULL) return -EMSGSIZE; @@ -608,31 +855,68 @@ static int dump_one_state(struct xfrm_state *x, int count, void *ptr) p = nlmsg_data(nlh); err = copy_to_user_state_extra(x, p, skb); - if (err) - goto nla_put_failure; - + if (err) { + nlmsg_cancel(skb, nlh); + return err; + } nlmsg_end(skb, nlh); -out: - sp->this_idx++; return 0; +} -nla_put_failure: - nlmsg_cancel(skb, nlh); - return err; +static int xfrm_dump_sa_done(struct netlink_callback *cb) +{ + struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; + struct sock *sk = cb->skb->sk; + struct net *net = sock_net(sk); + + xfrm_state_walk_done(walk, net); + return 0; } +static const struct nla_policy xfrma_policy[XFRMA_MAX+1]; static int xfrm_dump_sa(struct sk_buff *skb, struct netlink_callback *cb) { + struct net *net = sock_net(skb->sk); + struct xfrm_state_walk *walk = (struct xfrm_state_walk *) &cb->args[1]; struct xfrm_dump_info info; + BUILD_BUG_ON(sizeof(struct xfrm_state_walk) > + sizeof(cb->args) - sizeof(cb->args[0])); + info.in_skb = cb->skb; info.out_skb = skb; info.nlmsg_seq = cb->nlh->nlmsg_seq; info.nlmsg_flags = NLM_F_MULTI; - info.this_idx = 0; - info.start_idx = cb->args[0]; - (void) xfrm_state_walk(0, dump_one_state, &info); - cb->args[0] = info.this_idx; + + if (!cb->args[0]) { + struct nlattr *attrs[XFRMA_MAX+1]; + struct xfrm_address_filter *filter = NULL; + u8 proto = 0; + int err; + + cb->args[0] = 1; + + err = nlmsg_parse(cb->nlh, 0, attrs, XFRMA_MAX, + xfrma_policy); + if (err < 0) + return err; + + if (attrs[XFRMA_ADDRESS_FILTER]) { + filter = kmalloc(sizeof(*filter), GFP_KERNEL); + if (filter == NULL) + return -ENOMEM; + + memcpy(filter, nla_data(attrs[XFRMA_ADDRESS_FILTER]), + sizeof(*filter)); + } + + if (attrs[XFRMA_PROTO]) + proto = nla_get_u8(attrs[XFRMA_PROTO]); + + xfrm_state_walk_init(walk, proto, filter); + } + + (void) xfrm_state_walk(net, walk, dump_one_state, &info); return skb->len; } @@ -642,6 +926,7 @@ static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, { struct xfrm_dump_info info; struct sk_buff *skb; + int err; skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC); if (!skb) @@ -651,16 +936,30 @@ static struct sk_buff *xfrm_state_netlink(struct sk_buff *in_skb, info.out_skb = skb; info.nlmsg_seq = seq; info.nlmsg_flags = 0; - info.this_idx = info.start_idx = 0; - if (dump_one_state(x, 0, &info)) { + err = dump_one_state(x, 0, &info); + if (err) { kfree_skb(skb); - return NULL; + return ERR_PTR(err); } return skb; } +/* A wrapper for nlmsg_multicast() checking that nlsk is still available. + * Must be called with RCU read lock. + */ +static inline int xfrm_nlmsg_multicast(struct net *net, struct sk_buff *skb, + u32 pid, unsigned int group) +{ + struct sock *nlsk = rcu_dereference(net->xfrm.nlsk); + + if (nlsk) + return nlmsg_multicast(nlsk, skb, pid, group, GFP_ATOMIC); + else + return -1; +} + static inline size_t xfrm_spdinfo_msgsize(void) { return NLMSG_ALIGN(4) @@ -668,21 +967,23 @@ static inline size_t xfrm_spdinfo_msgsize(void) + nla_total_size(sizeof(struct xfrmu_spdhinfo)); } -static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) +static int build_spdinfo(struct sk_buff *skb, struct net *net, + u32 portid, u32 seq, u32 flags) { struct xfrmk_spdinfo si; struct xfrmu_spdinfo spc; struct xfrmu_spdhinfo sph; struct nlmsghdr *nlh; + int err; u32 *f; - nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); - if (nlh == NULL) /* shouldnt really happen ... */ + nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSPDINFO, sizeof(u32), 0); + if (nlh == NULL) /* shouldn't really happen ... */ return -EMSGSIZE; f = nlmsg_data(nlh); *f = flags; - xfrm_spd_getinfo(&si); + xfrm_spd_getinfo(net, &si); spc.incnt = si.incnt; spc.outcnt = si.outcnt; spc.fwdcnt = si.fwdcnt; @@ -692,32 +993,34 @@ static int build_spdinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) sph.spdhcnt = si.spdhcnt; sph.spdhmcnt = si.spdhmcnt; - NLA_PUT(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); - NLA_PUT(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); + err = nla_put(skb, XFRMA_SPD_INFO, sizeof(spc), &spc); + if (!err) + err = nla_put(skb, XFRMA_SPD_HINFO, sizeof(sph), &sph); + if (err) { + nlmsg_cancel(skb, nlh); + return err; + } return nlmsg_end(skb, nlh); - -nla_put_failure: - nlmsg_cancel(skb, nlh); - return -EMSGSIZE; } static int xfrm_get_spdinfo(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct sk_buff *r_skb; u32 *flags = nlmsg_data(nlh); - u32 spid = NETLINK_CB(skb).pid; + u32 sportid = NETLINK_CB(skb).portid; u32 seq = nlh->nlmsg_seq; r_skb = nlmsg_new(xfrm_spdinfo_msgsize(), GFP_ATOMIC); if (r_skb == NULL) return -ENOMEM; - if (build_spdinfo(r_skb, spid, seq, *flags) < 0) + if (build_spdinfo(r_skb, net, sportid, seq, *flags) < 0) BUG(); - return nlmsg_unicast(xfrm_nl, r_skb, spid); + return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); } static inline size_t xfrm_sadinfo_msgsize(void) @@ -727,61 +1030,66 @@ static inline size_t xfrm_sadinfo_msgsize(void) + nla_total_size(4); /* XFRMA_SAD_CNT */ } -static int build_sadinfo(struct sk_buff *skb, u32 pid, u32 seq, u32 flags) +static int build_sadinfo(struct sk_buff *skb, struct net *net, + u32 portid, u32 seq, u32 flags) { struct xfrmk_sadinfo si; struct xfrmu_sadhinfo sh; struct nlmsghdr *nlh; + int err; u32 *f; - nlh = nlmsg_put(skb, pid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); - if (nlh == NULL) /* shouldnt really happen ... */ + nlh = nlmsg_put(skb, portid, seq, XFRM_MSG_NEWSADINFO, sizeof(u32), 0); + if (nlh == NULL) /* shouldn't really happen ... */ return -EMSGSIZE; f = nlmsg_data(nlh); *f = flags; - xfrm_sad_getinfo(&si); + xfrm_sad_getinfo(net, &si); sh.sadhmcnt = si.sadhmcnt; sh.sadhcnt = si.sadhcnt; - NLA_PUT_U32(skb, XFRMA_SAD_CNT, si.sadcnt); - NLA_PUT(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); + err = nla_put_u32(skb, XFRMA_SAD_CNT, si.sadcnt); + if (!err) + err = nla_put(skb, XFRMA_SAD_HINFO, sizeof(sh), &sh); + if (err) { + nlmsg_cancel(skb, nlh); + return err; + } return nlmsg_end(skb, nlh); - -nla_put_failure: - nlmsg_cancel(skb, nlh); - return -EMSGSIZE; } static int xfrm_get_sadinfo(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct sk_buff *r_skb; u32 *flags = nlmsg_data(nlh); - u32 spid = NETLINK_CB(skb).pid; + u32 sportid = NETLINK_CB(skb).portid; u32 seq = nlh->nlmsg_seq; r_skb = nlmsg_new(xfrm_sadinfo_msgsize(), GFP_ATOMIC); if (r_skb == NULL) return -ENOMEM; - if (build_sadinfo(r_skb, spid, seq, *flags) < 0) + if (build_sadinfo(r_skb, net, sportid, seq, *flags) < 0) BUG(); - return nlmsg_unicast(xfrm_nl, r_skb, spid); + return nlmsg_unicast(net->xfrm.nlsk, r_skb, sportid); } static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_usersa_id *p = nlmsg_data(nlh); struct xfrm_state *x; struct sk_buff *resp_skb; int err = -ESRCH; - x = xfrm_user_state_lookup(p, attrs, &err); + x = xfrm_user_state_lookup(net, p, attrs, &err); if (x == NULL) goto out_noput; @@ -789,48 +1097,28 @@ static int xfrm_get_sa(struct sk_buff *skb, struct nlmsghdr *nlh, if (IS_ERR(resp_skb)) { err = PTR_ERR(resp_skb); } else { - err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); + err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); } xfrm_state_put(x); out_noput: return err; } -static int verify_userspi_info(struct xfrm_userspi_info *p) -{ - switch (p->info.id.proto) { - case IPPROTO_AH: - case IPPROTO_ESP: - break; - - case IPPROTO_COMP: - /* IPCOMP spi is 16-bits. */ - if (p->max >= 0x10000) - return -EINVAL; - break; - - default: - return -EINVAL; - } - - if (p->min > p->max) - return -EINVAL; - - return 0; -} - static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_state *x; struct xfrm_userspi_info *p; struct sk_buff *resp_skb; xfrm_address_t *daddr; int family; int err; + u32 mark; + struct xfrm_mark m; p = nlmsg_data(nlh); - err = verify_userspi_info(p); + err = verify_spi_info(p->info.id.proto, p->min, p->max); if (err) goto out_noput; @@ -838,16 +1126,18 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, daddr = &p->info.id.daddr; x = NULL; + + mark = xfrm_mark_get(attrs, &m); if (p->info.seq) { - x = xfrm_find_acq_byseq(p->info.seq); - if (x && xfrm_addr_cmp(&x->id.daddr, daddr, family)) { + x = xfrm_find_acq_byseq(net, mark, p->info.seq); + if (x && !xfrm_addr_equal(&x->id.daddr, daddr, family)) { xfrm_state_put(x); x = NULL; } } if (!x) - x = xfrm_find_acq(p->info.mode, p->info.reqid, + x = xfrm_find_acq(net, &m, p->info.mode, p->info.reqid, p->info.id.proto, daddr, &p->info.saddr, 1, family); @@ -865,7 +1155,7 @@ static int xfrm_alloc_userspi(struct sk_buff *skb, struct nlmsghdr *nlh, goto out; } - err = nlmsg_unicast(xfrm_nl, resp_skb, NETLINK_CB(skb).pid); + err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, NETLINK_CB(skb).portid); out: xfrm_state_put(x); @@ -906,6 +1196,8 @@ static int verify_policy_type(u8 type) static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) { + int ret; + switch (p->share) { case XFRM_SHARE_ANY: case XFRM_SHARE_SESSION: @@ -931,7 +1223,7 @@ static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) break; case AF_INET6: -#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) +#if IS_ENABLED(CONFIG_IPV6) break; #else return -EAFNOSUPPORT; @@ -941,7 +1233,13 @@ static int verify_newpolicy_info(struct xfrm_userpolicy_info *p) return -EINVAL; } - return verify_policy_dir(p->dir); + ret = verify_policy_dir(p->dir); + if (ret) + return ret; + if (p->index && ((p->index & XFRM_POLICY_MAX) != p->dir)) + return -EINVAL; + + return 0; } static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs) @@ -953,7 +1251,7 @@ static int copy_from_user_sec_ctx(struct xfrm_policy *pol, struct nlattr **attrs return 0; uctx = nla_data(rt); - return security_xfrm_policy_alloc(pol, uctx); + return security_xfrm_policy_alloc(&pol->security, uctx, GFP_KERNEL); } static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, @@ -975,6 +1273,8 @@ static void copy_templates(struct xfrm_policy *xp, struct xfrm_user_tmpl *ut, t->aalgos = ut->aalgos; t->ealgos = ut->ealgos; t->calgos = ut->calgos; + /* If all masks are ~0, then we allow all algorithms. */ + t->allalgs = !~(t->aalgos & t->ealgos & t->calgos); t->encap_family = ut->family; } } @@ -1000,7 +1300,7 @@ static int validate_tmpl(int nr, struct xfrm_user_tmpl *ut, u16 family) switch (ut[i].family) { case AF_INET: break; -#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) +#if IS_ENABLED(CONFIG_IPV6) case AF_INET6: break; #endif @@ -1066,6 +1366,7 @@ static void copy_from_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy static void copy_to_user_policy(struct xfrm_policy *xp, struct xfrm_userpolicy_info *p, int dir) { + memset(p, 0, sizeof(*p)); memcpy(&p->sel, &xp->selector, sizeof(p->sel)); memcpy(&p->lft, &xp->lft, sizeof(p->lft)); memcpy(&p->curlft, &xp->curlft, sizeof(p->curlft)); @@ -1078,9 +1379,9 @@ 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 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 xfrm_policy *xp = xfrm_policy_alloc(GFP_KERNEL); + struct xfrm_policy *xp = xfrm_policy_alloc(net, GFP_KERNEL); int err; if (!xp) { @@ -1099,10 +1400,12 @@ static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, if (err) goto error; + xfrm_mark_get(attrs, &xp->mark); + return xp; error: *errp = err; - xp->dead = 1; + xp->walk.dead = 1; xfrm_policy_destroy(xp); return NULL; } @@ -1110,6 +1413,7 @@ static struct xfrm_policy *xfrm_policy_construct(struct xfrm_userpolicy_info *p, static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_userpolicy_info *p = nlmsg_data(nlh); struct xfrm_policy *xp; struct km_event c; @@ -1123,28 +1427,27 @@ static int xfrm_add_policy(struct sk_buff *skb, struct nlmsghdr *nlh, if (err) return err; - xp = xfrm_policy_construct(p, attrs, &err); + xp = xfrm_policy_construct(net, p, attrs, &err); if (!xp) return err; - /* shouldnt excl be based on nlh flags?? + /* shouldn't excl be based on nlh flags?? * Aha! this is anti-netlink really i.e more pfkey derived * in netlink excl is a flag and you wouldnt need * a type XFRM_MSG_UPDPOLICY - JHS */ excl = nlh->nlmsg_type == XFRM_MSG_NEWPOLICY; err = xfrm_policy_insert(p->dir, xp, excl); - xfrm_audit_policy_add(xp, err ? 0 : 1, NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + xfrm_audit_policy_add(xp, err ? 0 : 1, true); if (err) { - security_xfrm_policy_free(xp); + security_xfrm_policy_free(xp->security); kfree(xp); return err; } c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; - c.pid = nlh->nlmsg_pid; + c.portid = nlh->nlmsg_pid; km_policy_notify(xp, p->dir, &c); xfrm_pol_put(xp); @@ -1164,6 +1467,7 @@ static int copy_to_user_tmpl(struct xfrm_policy *xp, struct sk_buff *skb) struct xfrm_user_tmpl *up = &vec[i]; struct xfrm_tmpl *kp = &xp->xfrm_vec[i]; + memset(up, 0, sizeof(*up)); memcpy(&up->id, &kp->id, sizeof(up->id)); up->family = kp->encap_family; memcpy(&up->saddr, &kp->saddr, sizeof(up->saddr)); @@ -1190,9 +1494,8 @@ static inline int copy_to_user_state_sec_ctx(struct xfrm_state *x, struct sk_buf static inline int copy_to_user_sec_ctx(struct xfrm_policy *xp, struct sk_buff *skb) { - if (xp->security) { + if (xp->security) return copy_sec_ctx(xp->security, skb); - } return 0; } static inline size_t userpolicy_type_attrsize(void) @@ -1228,49 +1531,59 @@ static int dump_one_policy(struct xfrm_policy *xp, int dir, int count, void *ptr struct sk_buff *in_skb = sp->in_skb; struct sk_buff *skb = sp->out_skb; struct nlmsghdr *nlh; + int err; - if (sp->this_idx < sp->start_idx) - goto out; - - nlh = nlmsg_put(skb, NETLINK_CB(in_skb).pid, sp->nlmsg_seq, + nlh = nlmsg_put(skb, NETLINK_CB(in_skb).portid, sp->nlmsg_seq, XFRM_MSG_NEWPOLICY, sizeof(*p), sp->nlmsg_flags); if (nlh == NULL) return -EMSGSIZE; p = nlmsg_data(nlh); copy_to_user_policy(xp, p, dir); - if (copy_to_user_tmpl(xp, skb) < 0) - goto nlmsg_failure; - if (copy_to_user_sec_ctx(xp, skb)) - goto nlmsg_failure; - if (copy_to_user_policy_type(xp->type, skb) < 0) - goto nlmsg_failure; - + err = copy_to_user_tmpl(xp, skb); + if (!err) + err = copy_to_user_sec_ctx(xp, skb); + if (!err) + err = copy_to_user_policy_type(xp->type, skb); + if (!err) + err = xfrm_mark_put(skb, &xp->mark); + if (err) { + nlmsg_cancel(skb, nlh); + return err; + } nlmsg_end(skb, nlh); -out: - sp->this_idx++; return 0; +} -nlmsg_failure: - nlmsg_cancel(skb, nlh); - return -EMSGSIZE; +static int xfrm_dump_policy_done(struct netlink_callback *cb) +{ + struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; + struct net *net = sock_net(cb->skb->sk); + + xfrm_policy_walk_done(walk, net); + return 0; } static int xfrm_dump_policy(struct sk_buff *skb, struct netlink_callback *cb) { + struct net *net = sock_net(skb->sk); + struct xfrm_policy_walk *walk = (struct xfrm_policy_walk *) &cb->args[1]; struct xfrm_dump_info info; + BUILD_BUG_ON(sizeof(struct xfrm_policy_walk) > + sizeof(cb->args) - sizeof(cb->args[0])); + info.in_skb = cb->skb; info.out_skb = skb; info.nlmsg_seq = cb->nlh->nlmsg_seq; info.nlmsg_flags = NLM_F_MULTI; - info.this_idx = 0; - info.start_idx = cb->args[0]; - (void) xfrm_policy_walk(XFRM_POLICY_TYPE_MAIN, dump_one_policy, &info); -#ifdef CONFIG_XFRM_SUB_POLICY - (void) xfrm_policy_walk(XFRM_POLICY_TYPE_SUB, dump_one_policy, &info); -#endif - cb->args[0] = info.this_idx; + + if (!cb->args[0]) { + cb->args[0] = 1; + xfrm_policy_walk_init(walk, XFRM_POLICY_TYPE_ANY); + } + + (void) xfrm_policy_walk(net, walk, dump_one_policy, &info); return skb->len; } @@ -1281,6 +1594,7 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, { struct xfrm_dump_info info; struct sk_buff *skb; + int err; skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!skb) @@ -1290,11 +1604,11 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, info.out_skb = skb; info.nlmsg_seq = seq; info.nlmsg_flags = 0; - info.this_idx = info.start_idx = 0; - if (dump_one_policy(xp, dir, 0, &info) < 0) { + err = dump_one_policy(xp, dir, 0, &info); + if (err) { kfree_skb(skb); - return NULL; + return ERR_PTR(err); } return skb; @@ -1303,12 +1617,15 @@ static struct sk_buff *xfrm_policy_netlink(struct sk_buff *in_skb, static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_policy *xp; struct xfrm_userpolicy_id *p; u8 type = XFRM_POLICY_TYPE_MAIN; int err; struct km_event c; int delete; + struct xfrm_mark m; + u32 mark = xfrm_mark_get(attrs, &m); p = nlmsg_data(nlh); delete = nlh->nlmsg_type == XFRM_MSG_DELPOLICY; @@ -1322,25 +1639,26 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, return err; if (p->index) - xp = xfrm_policy_byid(type, p->dir, p->index, delete, &err); + xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, delete, &err); else { struct nlattr *rt = attrs[XFRMA_SEC_CTX]; - struct xfrm_policy tmp; + struct xfrm_sec_ctx *ctx; err = verify_sec_ctx_len(attrs); if (err) return err; - memset(&tmp, 0, sizeof(struct xfrm_policy)); + ctx = NULL; if (rt) { struct xfrm_user_sec_ctx *uctx = nla_data(rt); - if ((err = security_xfrm_policy_alloc(&tmp, uctx))) + err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); + if (err) return err; } - xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, - delete, &err); - security_xfrm_policy_free(&tmp); + xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, &p->sel, + ctx, delete, &err); + security_xfrm_policy_free(ctx); } if (xp == NULL) return -ENOENT; @@ -1352,13 +1670,11 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, if (IS_ERR(resp_skb)) { err = PTR_ERR(resp_skb); } else { - err = nlmsg_unicast(xfrm_nl, resp_skb, - NETLINK_CB(skb).pid); + err = nlmsg_unicast(net->xfrm.nlsk, resp_skb, + NETLINK_CB(skb).portid); } } else { - xfrm_audit_policy_delete(xp, err ? 0 : 1, - NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + xfrm_audit_policy_delete(xp, err ? 0 : 1, true); if (err != 0) goto out; @@ -1366,99 +1682,133 @@ static int xfrm_get_policy(struct sk_buff *skb, struct nlmsghdr *nlh, c.data.byid = p->index; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; - c.pid = nlh->nlmsg_pid; + c.portid = nlh->nlmsg_pid; km_policy_notify(xp, p->dir, &c); } out: xfrm_pol_put(xp); + if (delete && err == 0) + xfrm_garbage_collect(net); return err; } static int xfrm_flush_sa(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct km_event c; struct xfrm_usersa_flush *p = nlmsg_data(nlh); - struct xfrm_audit audit_info; int err; - audit_info.loginuid = NETLINK_CB(skb).loginuid; - audit_info.secid = NETLINK_CB(skb).sid; - err = xfrm_state_flush(p->proto, &audit_info); - if (err) + err = xfrm_state_flush(net, p->proto, true); + if (err) { + if (err == -ESRCH) /* empty table */ + return 0; return err; + } c.data.proto = p->proto; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; - c.pid = nlh->nlmsg_pid; + c.portid = nlh->nlmsg_pid; + c.net = net; km_state_notify(NULL, &c); return 0; } -static inline size_t xfrm_aevent_msgsize(void) +static inline size_t xfrm_aevent_msgsize(struct xfrm_state *x) { + size_t replay_size = x->replay_esn ? + xfrm_replay_state_esn_len(x->replay_esn) : + sizeof(struct xfrm_replay_state); + return NLMSG_ALIGN(sizeof(struct xfrm_aevent_id)) - + nla_total_size(sizeof(struct xfrm_replay_state)) + + nla_total_size(replay_size) + nla_total_size(sizeof(struct xfrm_lifetime_cur)) + + nla_total_size(sizeof(struct xfrm_mark)) + nla_total_size(4) /* XFRM_AE_RTHR */ + nla_total_size(4); /* XFRM_AE_ETHR */ } -static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) +static int build_aevent(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) { struct xfrm_aevent_id *id; struct nlmsghdr *nlh; + int err; - nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); + nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_NEWAE, sizeof(*id), 0); if (nlh == NULL) return -EMSGSIZE; id = nlmsg_data(nlh); - memcpy(&id->sa_id.daddr, &x->id.daddr,sizeof(x->id.daddr)); + memcpy(&id->sa_id.daddr, &x->id.daddr, sizeof(x->id.daddr)); id->sa_id.spi = x->id.spi; id->sa_id.family = x->props.family; id->sa_id.proto = x->id.proto; - memcpy(&id->saddr, &x->props.saddr,sizeof(x->props.saddr)); + memcpy(&id->saddr, &x->props.saddr, sizeof(x->props.saddr)); id->reqid = x->props.reqid; id->flags = c->data.aevent; - NLA_PUT(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), &x->replay); - NLA_PUT(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); - - if (id->flags & XFRM_AE_RTHR) - NLA_PUT_U32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); + if (x->replay_esn) { + err = nla_put(skb, XFRMA_REPLAY_ESN_VAL, + xfrm_replay_state_esn_len(x->replay_esn), + x->replay_esn); + } else { + err = nla_put(skb, XFRMA_REPLAY_VAL, sizeof(x->replay), + &x->replay); + } + if (err) + goto out_cancel; + err = nla_put(skb, XFRMA_LTIME_VAL, sizeof(x->curlft), &x->curlft); + if (err) + goto out_cancel; - if (id->flags & XFRM_AE_ETHR) - NLA_PUT_U32(skb, XFRMA_ETIMER_THRESH, - x->replay_maxage * 10 / HZ); + if (id->flags & XFRM_AE_RTHR) { + err = nla_put_u32(skb, XFRMA_REPLAY_THRESH, x->replay_maxdiff); + if (err) + goto out_cancel; + } + if (id->flags & XFRM_AE_ETHR) { + err = nla_put_u32(skb, XFRMA_ETIMER_THRESH, + x->replay_maxage * 10 / HZ); + if (err) + goto out_cancel; + } + err = xfrm_mark_put(skb, &x->mark); + if (err) + goto out_cancel; return nlmsg_end(skb, nlh); -nla_put_failure: +out_cancel: nlmsg_cancel(skb, nlh); - return -EMSGSIZE; + return err; } static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_state *x; struct sk_buff *r_skb; int err; struct km_event c; + u32 mark; + struct xfrm_mark m; struct xfrm_aevent_id *p = nlmsg_data(nlh); struct xfrm_usersa_id *id = &p->sa_id; - r_skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); - if (r_skb == NULL) - return -ENOMEM; + mark = xfrm_mark_get(attrs, &m); - x = xfrm_state_lookup(&id->daddr, id->spi, id->proto, id->family); - if (x == NULL) { - kfree_skb(r_skb); + x = xfrm_state_lookup(net, mark, &id->daddr, id->spi, id->proto, id->family); + if (x == NULL) return -ESRCH; + + r_skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); + if (r_skb == NULL) { + xfrm_state_put(x); + return -ENOMEM; } /* @@ -1469,11 +1819,11 @@ static int xfrm_get_ae(struct sk_buff *skb, struct nlmsghdr *nlh, spin_lock_bh(&x->lock); c.data.aevent = p->flags; c.seq = nlh->nlmsg_seq; - c.pid = nlh->nlmsg_pid; + c.portid = nlh->nlmsg_pid; if (build_aevent(r_skb, x, &c) < 0) BUG(); - err = nlmsg_unicast(xfrm_nl, r_skb, NETLINK_CB(skb).pid); + err = nlmsg_unicast(net->xfrm.nlsk, r_skb, NETLINK_CB(skb).portid); spin_unlock_bh(&x->lock); xfrm_state_put(x); return err; @@ -1482,34 +1832,44 @@ 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 net *net = sock_net(skb->sk); struct xfrm_state *x; struct km_event c; - int err = - EINVAL; + int err = -EINVAL; + u32 mark = 0; + struct xfrm_mark m; struct xfrm_aevent_id *p = nlmsg_data(nlh); struct nlattr *rp = attrs[XFRMA_REPLAY_VAL]; + struct nlattr *re = attrs[XFRMA_REPLAY_ESN_VAL]; struct nlattr *lt = attrs[XFRMA_LTIME_VAL]; - if (!lt && !rp) + if (!lt && !rp && !re) return err; /* pedantic mode - thou shalt sayeth replaceth */ if (!(nlh->nlmsg_flags&NLM_F_REPLACE)) return err; - x = xfrm_state_lookup(&p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); + mark = xfrm_mark_get(attrs, &m); + + x = xfrm_state_lookup(net, mark, &p->sa_id.daddr, p->sa_id.spi, p->sa_id.proto, p->sa_id.family); if (x == NULL) return -ESRCH; if (x->km.state != XFRM_STATE_VALID) goto out; + err = xfrm_replay_verify_len(x->replay_esn, re); + if (err) + goto out; + spin_lock_bh(&x->lock); - xfrm_update_ae_params(x, attrs); + xfrm_update_ae_params(x, attrs, 1); spin_unlock_bh(&x->lock); c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; - c.pid = nlh->nlmsg_pid; + c.portid = nlh->nlmsg_pid; c.data.aevent = XFRM_AE_CU; km_state_notify(x, &c); err = 0; @@ -1521,24 +1881,27 @@ out: static int xfrm_flush_policy(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct km_event c; u8 type = XFRM_POLICY_TYPE_MAIN; int err; - struct xfrm_audit audit_info; err = copy_from_user_policy_type(&type, attrs); if (err) return err; - audit_info.loginuid = NETLINK_CB(skb).loginuid; - audit_info.secid = NETLINK_CB(skb).sid; - err = xfrm_policy_flush(type, &audit_info); - if (err) + err = xfrm_policy_flush(net, type, true); + if (err) { + if (err == -ESRCH) /* empty table */ + return 0; return err; + } + c.data.type = type; c.event = nlh->nlmsg_type; c.seq = nlh->nlmsg_seq; - c.pid = nlh->nlmsg_pid; + c.portid = nlh->nlmsg_pid; + c.net = net; km_policy_notify(NULL, 0, &c); return 0; } @@ -1546,58 +1909,60 @@ 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 net *net = sock_net(skb->sk); struct xfrm_policy *xp; struct xfrm_user_polexpire *up = nlmsg_data(nlh); struct xfrm_userpolicy_info *p = &up->pol; u8 type = XFRM_POLICY_TYPE_MAIN; int err = -ENOENT; + struct xfrm_mark m; + u32 mark = xfrm_mark_get(attrs, &m); err = copy_from_user_policy_type(&type, attrs); if (err) return err; + err = verify_policy_dir(p->dir); + if (err) + return err; + if (p->index) - xp = xfrm_policy_byid(type, p->dir, p->index, 0, &err); + xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err); else { struct nlattr *rt = attrs[XFRMA_SEC_CTX]; - struct xfrm_policy tmp; + struct xfrm_sec_ctx *ctx; err = verify_sec_ctx_len(attrs); if (err) return err; - memset(&tmp, 0, sizeof(struct xfrm_policy)); + ctx = NULL; if (rt) { struct xfrm_user_sec_ctx *uctx = nla_data(rt); - if ((err = security_xfrm_policy_alloc(&tmp, uctx))) + err = security_xfrm_policy_alloc(&ctx, uctx, GFP_KERNEL); + if (err) return err; } - xp = xfrm_policy_bysel_ctx(type, p->dir, &p->sel, tmp.security, - 0, &err); - security_xfrm_policy_free(&tmp); + xp = xfrm_policy_bysel_ctx(net, mark, type, p->dir, + &p->sel, ctx, 0, &err); + security_xfrm_policy_free(ctx); } - if (xp == NULL) return -ENOENT; - read_lock(&xp->lock); - if (xp->dead) { - read_unlock(&xp->lock); + + if (unlikely(xp->walk.dead)) goto out; - } - read_unlock(&xp->lock); err = 0; if (up->hard) { xfrm_policy_delete(xp, p->dir); - xfrm_audit_policy_delete(xp, 1, NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); - + xfrm_audit_policy_delete(xp, 1, true); } else { // reset the timers here? - printk("Dont know what to do with soft policy expire\n"); + WARN(1, "Dont know what to do with soft policy expire\n"); } - km_policy_expired(xp, p->dir, up->hard, current->pid); + km_policy_expired(xp, p->dir, up->hard, nlh->nlmsg_pid); out: xfrm_pol_put(xp); @@ -1607,12 +1972,15 @@ out: static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_state *x; int err; struct xfrm_user_expire *ue = nlmsg_data(nlh); struct xfrm_usersa_info *p = &ue->state; + struct xfrm_mark m; + u32 mark = xfrm_mark_get(attrs, &m); - x = xfrm_state_lookup(&p->id.daddr, p->id.spi, p->id.proto, p->family); + x = xfrm_state_lookup(net, mark, &p->id.daddr, p->id.spi, p->id.proto, p->family); err = -ENOENT; if (x == NULL) @@ -1622,12 +1990,11 @@ static int xfrm_add_sa_expire(struct sk_buff *skb, struct nlmsghdr *nlh, err = -EINVAL; if (x->km.state != XFRM_STATE_VALID) goto out; - km_state_expired(x, ue->hard, current->pid); + km_state_expired(x, ue->hard, nlh->nlmsg_pid); if (ue->hard) { __xfrm_state_delete(x); - xfrm_audit_state_delete(x, 1, NETLINK_CB(skb).loginuid, - NETLINK_CB(skb).sid); + xfrm_audit_state_delete(x, 1, true); } err = 0; out: @@ -1639,36 +2006,36 @@ out: static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, struct nlattr **attrs) { + struct net *net = sock_net(skb->sk); struct xfrm_policy *xp; struct xfrm_user_tmpl *ut; int i; struct nlattr *rt = attrs[XFRMA_TMPL]; + struct xfrm_mark mark; struct xfrm_user_acquire *ua = nlmsg_data(nlh); - struct xfrm_state *x = xfrm_state_alloc(); + struct xfrm_state *x = xfrm_state_alloc(net); int err = -ENOMEM; if (!x) - return err; + goto nomem; + + xfrm_mark_get(attrs, &mark); err = verify_newpolicy_info(&ua->policy); - if (err) { - printk("BAD policy passed\n"); - kfree(x); - return err; - } + if (err) + goto bad_policy; /* build an XP */ - xp = xfrm_policy_construct(&ua->policy, attrs, &err); - if (!xp) { - kfree(x); - return err; - } + xp = xfrm_policy_construct(net, &ua->policy, attrs, &err); + if (!xp) + goto free_state; memcpy(&x->id, &ua->id, sizeof(ua->id)); memcpy(&x->props.saddr, &ua->saddr, sizeof(ua->saddr)); memcpy(&x->sel, &ua->sel, sizeof(ua->sel)); - + xp->mark.m = x->mark.m = mark.m; + xp->mark.v = x->mark.v = mark.v; ut = nla_data(rt); /* extract the templates and for each call km_key */ for (i = 0; i < xp->xfrm_nr; i++, ut++) { @@ -1688,16 +2055,34 @@ static int xfrm_add_acquire(struct sk_buff *skb, struct nlmsghdr *nlh, kfree(xp); return 0; + +bad_policy: + WARN(1, "BAD policy passed\n"); +free_state: + kfree(x); +nomem: + return err; } #ifdef CONFIG_XFRM_MIGRATE static int copy_from_user_migrate(struct xfrm_migrate *ma, + struct xfrm_kmaddress *k, struct nlattr **attrs, int *num) { struct nlattr *rt = attrs[XFRMA_MIGRATE]; struct xfrm_user_migrate *um; int i, num_migrate; + if (k != NULL) { + struct xfrm_user_kmaddress *uk; + + uk = nla_data(attrs[XFRMA_KMADDRESS]); + memcpy(&k->local, &uk->local, sizeof(k->local)); + memcpy(&k->remote, &uk->remote, sizeof(k->remote)); + k->family = uk->family; + k->reserved = uk->reserved; + } + um = nla_data(rt); num_migrate = nla_len(rt) / sizeof(*um); @@ -1727,26 +2112,29 @@ static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, { struct xfrm_userpolicy_id *pi = nlmsg_data(nlh); struct xfrm_migrate m[XFRM_MAX_DEPTH]; + struct xfrm_kmaddress km, *kmp; u8 type; int err; int n = 0; + struct net *net = sock_net(skb->sk); if (attrs[XFRMA_MIGRATE] == NULL) return -EINVAL; + kmp = attrs[XFRMA_KMADDRESS] ? &km : NULL; + err = copy_from_user_policy_type(&type, attrs); if (err) return err; - err = copy_from_user_migrate((struct xfrm_migrate *)m, - attrs, &n); + err = copy_from_user_migrate((struct xfrm_migrate *)m, kmp, attrs, &n); if (err) return err; if (!n) return 0; - xfrm_migrate(&pi->sel, pi->dir, type, m, n); + xfrm_migrate(&pi->sel, pi->dir, type, m, n, kmp, net); return 0; } @@ -1759,7 +2147,7 @@ static int xfrm_do_migrate(struct sk_buff *skb, struct nlmsghdr *nlh, #endif #ifdef CONFIG_XFRM_MIGRATE -static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) +static int copy_to_user_migrate(const struct xfrm_migrate *m, struct sk_buff *skb) { struct xfrm_user_migrate um; @@ -1777,21 +2165,35 @@ static int copy_to_user_migrate(struct xfrm_migrate *m, struct sk_buff *skb) return nla_put(skb, XFRMA_MIGRATE, sizeof(um), &um); } -static inline size_t xfrm_migrate_msgsize(int num_migrate) +static int copy_to_user_kmaddress(const struct xfrm_kmaddress *k, struct sk_buff *skb) +{ + struct xfrm_user_kmaddress uk; + + memset(&uk, 0, sizeof(uk)); + uk.family = k->family; + uk.reserved = k->reserved; + memcpy(&uk.local, &k->local, sizeof(uk.local)); + memcpy(&uk.remote, &k->remote, sizeof(uk.remote)); + + return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk); +} + +static inline size_t xfrm_migrate_msgsize(int num_migrate, int with_kma) { return NLMSG_ALIGN(sizeof(struct xfrm_userpolicy_id)) - + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) - + userpolicy_type_attrsize(); + + (with_kma ? nla_total_size(sizeof(struct xfrm_kmaddress)) : 0) + + nla_total_size(sizeof(struct xfrm_user_migrate) * num_migrate) + + userpolicy_type_attrsize(); } -static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, - int num_migrate, struct xfrm_selector *sel, - u8 dir, u8 type) +static int build_migrate(struct sk_buff *skb, const struct xfrm_migrate *m, + int num_migrate, const struct xfrm_kmaddress *k, + const struct xfrm_selector *sel, u8 dir, u8 type) { - struct xfrm_migrate *mp; + const struct xfrm_migrate *mp; struct xfrm_userpolicy_id *pol_id; struct nlmsghdr *nlh; - int i; + int i, err; nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MIGRATE, sizeof(*pol_id), 0); if (nlh == NULL) @@ -1803,38 +2205,48 @@ static int build_migrate(struct sk_buff *skb, struct xfrm_migrate *m, memcpy(&pol_id->sel, sel, sizeof(pol_id->sel)); pol_id->dir = dir; - if (copy_to_user_policy_type(type, skb) < 0) - goto nlmsg_failure; - + if (k != NULL) { + err = copy_to_user_kmaddress(k, skb); + if (err) + goto out_cancel; + } + err = copy_to_user_policy_type(type, skb); + if (err) + goto out_cancel; for (i = 0, mp = m ; i < num_migrate; i++, mp++) { - if (copy_to_user_migrate(mp, skb) < 0) - goto nlmsg_failure; + err = copy_to_user_migrate(mp, skb); + if (err) + goto out_cancel; } return nlmsg_end(skb, nlh); -nlmsg_failure: + +out_cancel: nlmsg_cancel(skb, nlh); - return -EMSGSIZE; + return err; } -static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, - struct xfrm_migrate *m, int num_migrate) +static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, + const struct xfrm_migrate *m, int num_migrate, + const struct xfrm_kmaddress *k) { + struct net *net = &init_net; struct sk_buff *skb; - skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate), GFP_ATOMIC); + skb = nlmsg_new(xfrm_migrate_msgsize(num_migrate, !!k), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; /* build migrate */ - if (build_migrate(skb, m, num_migrate, sel, dir, type) < 0) + if (build_migrate(skb, m, num_migrate, k, sel, dir, type) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_MIGRATE, GFP_ATOMIC); + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MIGRATE); } #else -static int xfrm_send_migrate(struct xfrm_selector *sel, u8 dir, u8 type, - struct xfrm_migrate *m, int num_migrate) +static int xfrm_send_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, + const struct xfrm_migrate *m, int num_migrate, + const struct xfrm_kmaddress *k) { return -ENOPROTOOPT; } @@ -1868,6 +2280,10 @@ static const int xfrm_msg_min[XFRM_NR_MSGTYPES] = { #undef XMSGSIZE static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { + [XFRMA_SA] = { .len = sizeof(struct xfrm_usersa_info)}, + [XFRMA_POLICY] = { .len = sizeof(struct xfrm_userpolicy_info)}, + [XFRMA_LASTUSED] = { .type = NLA_U64}, + [XFRMA_ALG_AUTH_TRUNC] = { .len = sizeof(struct xfrm_algo_auth)}, [XFRMA_ALG_AEAD] = { .len = sizeof(struct xfrm_algo_aead) }, [XFRMA_ALG_AUTH] = { .len = sizeof(struct xfrm_algo) }, [XFRMA_ALG_CRYPT] = { .len = sizeof(struct xfrm_algo) }, @@ -1883,20 +2299,30 @@ static const struct nla_policy xfrma_policy[XFRMA_MAX+1] = { [XFRMA_COADDR] = { .len = sizeof(xfrm_address_t) }, [XFRMA_POLICY_TYPE] = { .len = sizeof(struct xfrm_userpolicy_type)}, [XFRMA_MIGRATE] = { .len = sizeof(struct xfrm_user_migrate) }, + [XFRMA_KMADDRESS] = { .len = sizeof(struct xfrm_user_kmaddress) }, + [XFRMA_MARK] = { .len = sizeof(struct xfrm_mark) }, + [XFRMA_TFCPAD] = { .type = NLA_U32 }, + [XFRMA_REPLAY_ESN_VAL] = { .len = sizeof(struct xfrm_replay_state_esn) }, + [XFRMA_SA_EXTRA_FLAGS] = { .type = NLA_U32 }, + [XFRMA_PROTO] = { .type = NLA_U8 }, + [XFRMA_ADDRESS_FILTER] = { .len = sizeof(struct xfrm_address_filter) }, }; -static struct xfrm_link { +static const struct xfrm_link { int (*doit)(struct sk_buff *, struct nlmsghdr *, struct nlattr **); int (*dump)(struct sk_buff *, struct netlink_callback *); + int (*done)(struct netlink_callback *); } xfrm_dispatch[XFRM_NR_MSGTYPES] = { [XFRM_MSG_NEWSA - XFRM_MSG_BASE] = { .doit = xfrm_add_sa }, [XFRM_MSG_DELSA - XFRM_MSG_BASE] = { .doit = xfrm_del_sa }, [XFRM_MSG_GETSA - XFRM_MSG_BASE] = { .doit = xfrm_get_sa, - .dump = xfrm_dump_sa }, + .dump = xfrm_dump_sa, + .done = xfrm_dump_sa_done }, [XFRM_MSG_NEWPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_add_policy }, [XFRM_MSG_DELPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy }, [XFRM_MSG_GETPOLICY - XFRM_MSG_BASE] = { .doit = xfrm_get_policy, - .dump = xfrm_dump_policy }, + .dump = xfrm_dump_policy, + .done = xfrm_dump_policy_done }, [XFRM_MSG_ALLOCSPI - XFRM_MSG_BASE] = { .doit = xfrm_alloc_userspi }, [XFRM_MSG_ACQUIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_acquire }, [XFRM_MSG_EXPIRE - XFRM_MSG_BASE] = { .doit = xfrm_add_sa_expire }, @@ -1914,8 +2340,9 @@ static struct xfrm_link { static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) { + struct net *net = sock_net(skb->sk); struct nlattr *attrs[XFRMA_MAX+1]; - struct xfrm_link *link; + const struct xfrm_link *link; int type, err; type = nlh->nlmsg_type; @@ -1926,7 +2353,7 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) link = &xfrm_dispatch[type]; /* All operations require privileges, even GET */ - if (security_netlink_recv(skb, CAP_NET_ADMIN)) + if (!netlink_net_capable(skb, CAP_NET_ADMIN)) return -EPERM; if ((type == (XFRM_MSG_GETSA - XFRM_MSG_BASE) || @@ -1935,7 +2362,13 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) if (link->dump == NULL) return -EINVAL; - return netlink_dump_start(xfrm_nl, skb, nlh, link->dump, NULL); + { + struct netlink_dump_control c = { + .dump = link->dump, + .done = link->done, + }; + return netlink_dump_start(net->xfrm.nlsk, skb, nlh, &c); + } } err = nlmsg_parse(nlh, xfrm_msg_min[type], attrs, XFRMA_MAX, @@ -1951,22 +2384,26 @@ static int xfrm_user_rcv_msg(struct sk_buff *skb, struct nlmsghdr *nlh) static void xfrm_netlink_rcv(struct sk_buff *skb) { - mutex_lock(&xfrm_cfg_mutex); + struct net *net = sock_net(skb->sk); + + mutex_lock(&net->xfrm.xfrm_cfg_mutex); netlink_rcv_skb(skb, &xfrm_user_rcv_msg); - mutex_unlock(&xfrm_cfg_mutex); + mutex_unlock(&net->xfrm.xfrm_cfg_mutex); } static inline size_t xfrm_expire_msgsize(void) { - return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)); + return NLMSG_ALIGN(sizeof(struct xfrm_user_expire)) + + nla_total_size(sizeof(struct xfrm_mark)); } -static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_event *c) +static int build_expire(struct sk_buff *skb, struct xfrm_state *x, const struct km_event *c) { struct xfrm_user_expire *ue; struct nlmsghdr *nlh; + int err; - nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); + nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_EXPIRE, sizeof(*ue), 0); if (nlh == NULL) return -EMSGSIZE; @@ -1974,39 +2411,48 @@ static int build_expire(struct sk_buff *skb, struct xfrm_state *x, struct km_eve copy_to_user_state(x, &ue->state); ue->hard = (c->data.hard != 0) ? 1 : 0; + err = xfrm_mark_put(skb, &x->mark); + if (err) + return err; + return nlmsg_end(skb, nlh); } -static int xfrm_exp_state_notify(struct xfrm_state *x, struct km_event *c) +static int xfrm_exp_state_notify(struct xfrm_state *x, const struct km_event *c) { + struct net *net = xs_net(x); struct sk_buff *skb; skb = nlmsg_new(xfrm_expire_msgsize(), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; - if (build_expire(skb, x, c) < 0) - BUG(); + if (build_expire(skb, x, c) < 0) { + kfree_skb(skb); + return -EMSGSIZE; + } - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); } -static int xfrm_aevent_state_notify(struct xfrm_state *x, struct km_event *c) +static int xfrm_aevent_state_notify(struct xfrm_state *x, const struct km_event *c) { + struct net *net = xs_net(x); struct sk_buff *skb; - skb = nlmsg_new(xfrm_aevent_msgsize(), GFP_ATOMIC); + skb = nlmsg_new(xfrm_aevent_msgsize(x), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; if (build_aevent(skb, x, c) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_AEVENTS, GFP_ATOMIC); + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_AEVENTS); } -static int xfrm_notify_sa_flush(struct km_event *c) +static int xfrm_notify_sa_flush(const struct km_event *c) { + struct net *net = c->net; struct xfrm_usersa_flush *p; struct nlmsghdr *nlh; struct sk_buff *skb; @@ -2016,7 +2462,7 @@ static int xfrm_notify_sa_flush(struct km_event *c) if (skb == NULL) return -ENOMEM; - nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); + nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHSA, sizeof(*p), 0); if (nlh == NULL) { kfree_skb(skb); return -EMSGSIZE; @@ -2027,7 +2473,7 @@ static int xfrm_notify_sa_flush(struct km_event *c) nlmsg_end(skb, nlh); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); } static inline size_t xfrm_sa_len(struct xfrm_state *x) @@ -2035,19 +2481,28 @@ static inline size_t xfrm_sa_len(struct xfrm_state *x) size_t l = 0; if (x->aead) l += nla_total_size(aead_len(x->aead)); - if (x->aalg) - l += nla_total_size(xfrm_alg_len(x->aalg)); + if (x->aalg) { + l += nla_total_size(sizeof(struct xfrm_algo) + + (x->aalg->alg_key_len + 7) / 8); + l += nla_total_size(xfrm_alg_auth_len(x->aalg)); + } if (x->ealg) l += nla_total_size(xfrm_alg_len(x->ealg)); if (x->calg) l += nla_total_size(sizeof(*x->calg)); if (x->encap) l += nla_total_size(sizeof(*x->encap)); + if (x->tfcpad) + l += nla_total_size(sizeof(x->tfcpad)); + if (x->replay_esn) + l += nla_total_size(xfrm_replay_state_esn_len(x->replay_esn)); if (x->security) l += nla_total_size(sizeof(struct xfrm_user_sec_ctx) + x->security->ctx_len); if (x->coaddr) l += nla_total_size(sizeof(*x->coaddr)); + if (x->props.extra_flags) + l += nla_total_size(sizeof(x->props.extra_flags)); /* Must count x->lastused as it may become non-zero behind our back. */ l += nla_total_size(sizeof(u64)); @@ -2055,19 +2510,21 @@ static inline size_t xfrm_sa_len(struct xfrm_state *x) return l; } -static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) +static int xfrm_notify_sa(struct xfrm_state *x, const struct km_event *c) { + struct net *net = xs_net(x); struct xfrm_usersa_info *p; struct xfrm_usersa_id *id; struct nlmsghdr *nlh; struct sk_buff *skb; int len = xfrm_sa_len(x); - int headlen; + int headlen, err; headlen = sizeof(*p); if (c->event == XFRM_MSG_DELSA) { len += nla_total_size(headlen); headlen = sizeof(*id); + len += nla_total_size(sizeof(struct xfrm_mark)); } len += NLMSG_ALIGN(headlen); @@ -2075,9 +2532,10 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) if (skb == NULL) return -ENOMEM; - nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); + nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); + err = -EMSGSIZE; if (nlh == NULL) - goto nla_put_failure; + goto out_free_skb; p = nlmsg_data(nlh); if (c->event == XFRM_MSG_DELSA) { @@ -2090,27 +2548,26 @@ static int xfrm_notify_sa(struct xfrm_state *x, struct km_event *c) id->proto = x->id.proto; attr = nla_reserve(skb, XFRMA_SA, sizeof(*p)); + err = -EMSGSIZE; if (attr == NULL) - goto nla_put_failure; + goto out_free_skb; p = nla_data(attr); } - - if (copy_to_user_state_extra(x, p, skb)) - goto nla_put_failure; + err = copy_to_user_state_extra(x, p, skb); + if (err) + goto out_free_skb; nlmsg_end(skb, nlh); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_SA, GFP_ATOMIC); + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_SA); -nla_put_failure: - /* Somebody screwed up with xfrm_sa_len! */ - WARN_ON(1); +out_free_skb: kfree_skb(skb); - return -1; + return err; } -static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) +static int xfrm_send_state_notify(struct xfrm_state *x, const struct km_event *c) { switch (c->event) { @@ -2125,8 +2582,9 @@ static int xfrm_send_state_notify(struct xfrm_state *x, struct km_event *c) case XFRM_MSG_FLUSHSA: return xfrm_notify_sa_flush(c); default: - printk("xfrm_user: Unknown SA event %d\n", c->event); - break; + printk(KERN_NOTICE "xfrm_user: Unknown SA event %d\n", + c->event); + break; } return 0; @@ -2138,17 +2596,18 @@ static inline size_t xfrm_acquire_msgsize(struct xfrm_state *x, { return NLMSG_ALIGN(sizeof(struct xfrm_user_acquire)) + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) + + nla_total_size(sizeof(struct xfrm_mark)) + nla_total_size(xfrm_user_sec_ctx_size(x->security)) + userpolicy_type_attrsize(); } static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, - struct xfrm_tmpl *xt, struct xfrm_policy *xp, - int dir) + struct xfrm_tmpl *xt, struct xfrm_policy *xp) { + __u32 seq = xfrm_get_acqseq(); struct xfrm_user_acquire *ua; struct nlmsghdr *nlh; - __u32 seq = xfrm_get_acqseq(); + int err; nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_ACQUIRE, sizeof(*ua), 0); if (nlh == NULL) @@ -2158,39 +2617,41 @@ static int build_acquire(struct sk_buff *skb, struct xfrm_state *x, memcpy(&ua->id, &x->id, sizeof(ua->id)); memcpy(&ua->saddr, &x->props.saddr, sizeof(ua->saddr)); memcpy(&ua->sel, &x->sel, sizeof(ua->sel)); - copy_to_user_policy(xp, &ua->policy, dir); + copy_to_user_policy(xp, &ua->policy, XFRM_POLICY_OUT); ua->aalgos = xt->aalgos; ua->ealgos = xt->ealgos; ua->calgos = xt->calgos; ua->seq = x->km.seq = seq; - if (copy_to_user_tmpl(xp, skb) < 0) - goto nlmsg_failure; - if (copy_to_user_state_sec_ctx(x, skb)) - goto nlmsg_failure; - if (copy_to_user_policy_type(xp->type, skb) < 0) - goto nlmsg_failure; + err = copy_to_user_tmpl(xp, skb); + if (!err) + err = copy_to_user_state_sec_ctx(x, skb); + if (!err) + err = copy_to_user_policy_type(xp->type, skb); + if (!err) + err = xfrm_mark_put(skb, &xp->mark); + if (err) { + nlmsg_cancel(skb, nlh); + return err; + } return nlmsg_end(skb, nlh); - -nlmsg_failure: - nlmsg_cancel(skb, nlh); - return -EMSGSIZE; } static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, - struct xfrm_policy *xp, int dir) + struct xfrm_policy *xp) { + struct net *net = xs_net(x); struct sk_buff *skb; skb = nlmsg_new(xfrm_acquire_msgsize(x, xp), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; - if (build_acquire(skb, x, xt, xp, dir) < 0) + if (build_acquire(skb, x, xt, xp) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_ACQUIRE, GFP_ATOMIC); + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_ACQUIRE); } /* User gives us xfrm_user_policy_info followed by an array of 0 @@ -2199,6 +2660,7 @@ static int xfrm_send_acquire(struct xfrm_state *x, struct xfrm_tmpl *xt, static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, u8 *data, int len, int *dir) { + struct net *net = sock_net(sk); struct xfrm_userpolicy_info *p = (struct xfrm_userpolicy_info *)data; struct xfrm_user_tmpl *ut = (struct xfrm_user_tmpl *) (p + 1); struct xfrm_policy *xp; @@ -2211,7 +2673,7 @@ static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, return NULL; } break; -#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) +#if IS_ENABLED(CONFIG_IPV6) case AF_INET6: if (opt != IPV6_XFRM_POLICY) { *dir = -EOPNOTSUPP; @@ -2237,7 +2699,7 @@ static struct xfrm_policy *xfrm_compile_policy(struct sock *sk, int opt, if (p->dir > XFRM_POLICY_OUT) return NULL; - xp = xfrm_policy_alloc(GFP_KERNEL); + xp = xfrm_policy_alloc(net, GFP_ATOMIC); if (xp == NULL) { *dir = -ENOBUFS; return NULL; @@ -2257,39 +2719,43 @@ static inline size_t xfrm_polexpire_msgsize(struct xfrm_policy *xp) return NLMSG_ALIGN(sizeof(struct xfrm_user_polexpire)) + nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr) + nla_total_size(xfrm_user_sec_ctx_size(xp->security)) + + nla_total_size(sizeof(struct xfrm_mark)) + userpolicy_type_attrsize(); } static int build_polexpire(struct sk_buff *skb, struct xfrm_policy *xp, - int dir, struct km_event *c) + int dir, const struct km_event *c) { struct xfrm_user_polexpire *upe; - struct nlmsghdr *nlh; int hard = c->data.hard; + struct nlmsghdr *nlh; + int err; - nlh = nlmsg_put(skb, c->pid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); + nlh = nlmsg_put(skb, c->portid, 0, XFRM_MSG_POLEXPIRE, sizeof(*upe), 0); if (nlh == NULL) return -EMSGSIZE; upe = nlmsg_data(nlh); copy_to_user_policy(xp, &upe->pol, dir); - if (copy_to_user_tmpl(xp, skb) < 0) - goto nlmsg_failure; - if (copy_to_user_sec_ctx(xp, skb)) - goto nlmsg_failure; - if (copy_to_user_policy_type(xp->type, skb) < 0) - goto nlmsg_failure; + err = copy_to_user_tmpl(xp, skb); + if (!err) + err = copy_to_user_sec_ctx(xp, skb); + if (!err) + err = copy_to_user_policy_type(xp->type, skb); + if (!err) + err = xfrm_mark_put(skb, &xp->mark); + if (err) { + nlmsg_cancel(skb, nlh); + return err; + } upe->hard = !!hard; return nlmsg_end(skb, nlh); - -nlmsg_failure: - nlmsg_cancel(skb, nlh); - return -EMSGSIZE; } -static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) +static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) { + struct net *net = xp_net(xp); struct sk_buff *skb; skb = nlmsg_new(xfrm_polexpire_msgsize(xp), GFP_ATOMIC); @@ -2299,17 +2765,18 @@ static int xfrm_exp_policy_notify(struct xfrm_policy *xp, int dir, struct km_eve if (build_polexpire(skb, xp, dir, c) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_EXPIRE, GFP_ATOMIC); + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_EXPIRE); } -static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event *c) +static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, const struct km_event *c) { + int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); + struct net *net = xp_net(xp); struct xfrm_userpolicy_info *p; struct xfrm_userpolicy_id *id; struct nlmsghdr *nlh; struct sk_buff *skb; - int len = nla_total_size(sizeof(struct xfrm_user_tmpl) * xp->xfrm_nr); - int headlen; + int headlen, err; headlen = sizeof(*p); if (c->event == XFRM_MSG_DELPOLICY) { @@ -2317,15 +2784,17 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event * headlen = sizeof(*id); } len += userpolicy_type_attrsize(); + len += nla_total_size(sizeof(struct xfrm_mark)); len += NLMSG_ALIGN(headlen); skb = nlmsg_new(len, GFP_ATOMIC); if (skb == NULL) return -ENOMEM; - nlh = nlmsg_put(skb, c->pid, c->seq, c->event, headlen, 0); + nlh = nlmsg_put(skb, c->portid, c->seq, c->event, headlen, 0); + err = -EMSGSIZE; if (nlh == NULL) - goto nlmsg_failure; + goto out_free_skb; p = nlmsg_data(nlh); if (c->event == XFRM_MSG_DELPOLICY) { @@ -2340,52 +2809,60 @@ static int xfrm_notify_policy(struct xfrm_policy *xp, int dir, struct km_event * memcpy(&id->sel, &xp->selector, sizeof(id->sel)); attr = nla_reserve(skb, XFRMA_POLICY, sizeof(*p)); + err = -EMSGSIZE; if (attr == NULL) - goto nlmsg_failure; + goto out_free_skb; p = nla_data(attr); } copy_to_user_policy(xp, p, dir); - if (copy_to_user_tmpl(xp, skb) < 0) - goto nlmsg_failure; - if (copy_to_user_policy_type(xp->type, skb) < 0) - goto nlmsg_failure; + err = copy_to_user_tmpl(xp, skb); + if (!err) + err = copy_to_user_policy_type(xp->type, skb); + if (!err) + err = xfrm_mark_put(skb, &xp->mark); + if (err) + goto out_free_skb; nlmsg_end(skb, nlh); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); -nlmsg_failure: +out_free_skb: kfree_skb(skb); - return -1; + return err; } -static int xfrm_notify_policy_flush(struct km_event *c) +static int xfrm_notify_policy_flush(const struct km_event *c) { + struct net *net = c->net; struct nlmsghdr *nlh; struct sk_buff *skb; + int err; skb = nlmsg_new(userpolicy_type_attrsize(), GFP_ATOMIC); if (skb == NULL) return -ENOMEM; - nlh = nlmsg_put(skb, c->pid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); + nlh = nlmsg_put(skb, c->portid, c->seq, XFRM_MSG_FLUSHPOLICY, 0, 0); + err = -EMSGSIZE; if (nlh == NULL) - goto nlmsg_failure; - if (copy_to_user_policy_type(c->data.type, skb) < 0) - goto nlmsg_failure; + goto out_free_skb; + err = copy_to_user_policy_type(c->data.type, skb); + if (err) + goto out_free_skb; nlmsg_end(skb, nlh); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_POLICY, GFP_ATOMIC); + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_POLICY); -nlmsg_failure: +out_free_skb: kfree_skb(skb); - return -1; + return err; } -static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_event *c) +static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) { switch (c->event) { @@ -2398,7 +2875,8 @@ static int xfrm_send_policy_notify(struct xfrm_policy *xp, int dir, struct km_ev case XFRM_MSG_POLEXPIRE: return xfrm_exp_policy_notify(xp, dir, c); default: - printk("xfrm_user: Unknown Policy event %d\n", c->event); + printk(KERN_NOTICE "xfrm_user: Unknown Policy event %d\n", + c->event); } return 0; @@ -2424,18 +2902,18 @@ static int build_report(struct sk_buff *skb, u8 proto, ur->proto = proto; memcpy(&ur->sel, sel, sizeof(ur->sel)); - if (addr) - NLA_PUT(skb, XFRMA_COADDR, sizeof(*addr), addr); - + if (addr) { + int err = nla_put(skb, XFRMA_COADDR, sizeof(*addr), addr); + if (err) { + nlmsg_cancel(skb, nlh); + return err; + } + } return nlmsg_end(skb, nlh); - -nla_put_failure: - nlmsg_cancel(skb, nlh); - return -EMSGSIZE; } -static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, - xfrm_address_t *addr) +static int xfrm_send_report(struct net *net, u8 proto, + struct xfrm_selector *sel, xfrm_address_t *addr) { struct sk_buff *skb; @@ -2446,7 +2924,64 @@ static int xfrm_send_report(u8 proto, struct xfrm_selector *sel, if (build_report(skb, proto, sel, addr) < 0) BUG(); - return nlmsg_multicast(xfrm_nl, skb, 0, XFRMNLGRP_REPORT, GFP_ATOMIC); + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_REPORT); +} + +static inline size_t xfrm_mapping_msgsize(void) +{ + return NLMSG_ALIGN(sizeof(struct xfrm_user_mapping)); +} + +static int build_mapping(struct sk_buff *skb, struct xfrm_state *x, + xfrm_address_t *new_saddr, __be16 new_sport) +{ + struct xfrm_user_mapping *um; + struct nlmsghdr *nlh; + + nlh = nlmsg_put(skb, 0, 0, XFRM_MSG_MAPPING, sizeof(*um), 0); + if (nlh == NULL) + return -EMSGSIZE; + + um = nlmsg_data(nlh); + + memcpy(&um->id.daddr, &x->id.daddr, sizeof(um->id.daddr)); + um->id.spi = x->id.spi; + um->id.family = x->props.family; + um->id.proto = x->id.proto; + memcpy(&um->new_saddr, new_saddr, sizeof(um->new_saddr)); + memcpy(&um->old_saddr, &x->props.saddr, sizeof(um->old_saddr)); + um->new_sport = new_sport; + um->old_sport = x->encap->encap_sport; + um->reqid = x->props.reqid; + + return nlmsg_end(skb, nlh); +} + +static int xfrm_send_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, + __be16 sport) +{ + struct net *net = xs_net(x); + struct sk_buff *skb; + + if (x->id.proto != IPPROTO_ESP) + return -EINVAL; + + if (!x->encap) + return -EINVAL; + + skb = nlmsg_new(xfrm_mapping_msgsize(), GFP_ATOMIC); + if (skb == NULL) + return -ENOMEM; + + if (build_mapping(skb, x, ipaddr, sport) < 0) + BUG(); + + return xfrm_nlmsg_multicast(net, skb, 0, XFRMNLGRP_MAPPING); +} + +static bool xfrm_is_alive(const struct km_event *c) +{ + return (bool)xfrm_acquire_is_on(c->net); } static struct xfrm_mgr netlink_mgr = { @@ -2457,33 +2992,60 @@ static struct xfrm_mgr netlink_mgr = { .notify_policy = xfrm_send_policy_notify, .report = xfrm_send_report, .migrate = xfrm_send_migrate, + .new_mapping = xfrm_send_mapping, + .is_alive = xfrm_is_alive, }; -static int __init xfrm_user_init(void) +static int __net_init xfrm_user_net_init(struct net *net) { struct sock *nlsk; + struct netlink_kernel_cfg cfg = { + .groups = XFRMNLGRP_MAX, + .input = xfrm_netlink_rcv, + }; - printk(KERN_INFO "Initializing XFRM netlink socket\n"); - - nlsk = netlink_kernel_create(&init_net, NETLINK_XFRM, XFRMNLGRP_MAX, - xfrm_netlink_rcv, NULL, THIS_MODULE); + nlsk = netlink_kernel_create(net, NETLINK_XFRM, &cfg); if (nlsk == NULL) return -ENOMEM; - rcu_assign_pointer(xfrm_nl, nlsk); + net->xfrm.nlsk_stash = nlsk; /* Don't set to NULL */ + rcu_assign_pointer(net->xfrm.nlsk, nlsk); + return 0; +} - xfrm_register_km(&netlink_mgr); +static void __net_exit xfrm_user_net_exit(struct list_head *net_exit_list) +{ + struct net *net; + list_for_each_entry(net, net_exit_list, exit_list) + RCU_INIT_POINTER(net->xfrm.nlsk, NULL); + synchronize_net(); + list_for_each_entry(net, net_exit_list, exit_list) + netlink_kernel_release(net->xfrm.nlsk_stash); +} - return 0; +static struct pernet_operations xfrm_user_net_ops = { + .init = xfrm_user_net_init, + .exit_batch = xfrm_user_net_exit, +}; + +static int __init xfrm_user_init(void) +{ + int rv; + + printk(KERN_INFO "Initializing XFRM netlink socket\n"); + + rv = register_pernet_subsys(&xfrm_user_net_ops); + if (rv < 0) + return rv; + rv = xfrm_register_km(&netlink_mgr); + if (rv < 0) + unregister_pernet_subsys(&xfrm_user_net_ops); + return rv; } static void __exit xfrm_user_exit(void) { - struct sock *nlsk = xfrm_nl; - xfrm_unregister_km(&netlink_mgr); - rcu_assign_pointer(xfrm_nl, NULL); - synchronize_rcu(); - netlink_kernel_release(nlsk); + unregister_pernet_subsys(&xfrm_user_net_ops); } module_init(xfrm_user_init); |