diff options
Diffstat (limited to 'net/netfilter')
-rw-r--r-- | net/netfilter/nf_conntrack_helper.c | 3 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_netlink.c | 1 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_proto_gre.c | 3 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_proto_tcp.c | 6 | ||||
-rw-r--r-- | net/netfilter/nf_conntrack_standalone.c | 1 | ||||
-rw-r--r-- | net/netfilter/nf_flow_table_core.c | 2 | ||||
-rw-r--r-- | net/netfilter/nf_flow_table_offload.c | 6 | ||||
-rw-r--r-- | net/netfilter/nf_nat_proto.c | 25 | ||||
-rw-r--r-- | net/netfilter/nf_tables_api.c | 87 | ||||
-rw-r--r-- | net/netfilter/nft_limit.c | 4 | ||||
-rw-r--r-- | net/netfilter/x_tables.c | 65 |
11 files changed, 143 insertions, 60 deletions
diff --git a/net/netfilter/nf_conntrack_helper.c b/net/netfilter/nf_conntrack_helper.c index 118f415928ae..b055187235f8 100644 --- a/net/netfilter/nf_conntrack_helper.c +++ b/net/netfilter/nf_conntrack_helper.c @@ -219,7 +219,7 @@ nf_ct_lookup_helper(struct nf_conn *ct, struct net *net) return NULL; pr_info("nf_conntrack: default automatic helper assignment " "has been turned off for security reasons and CT-based " - " firewall rule not found. Use the iptables CT target " + "firewall rule not found. Use the iptables CT target " "to attach helpers instead.\n"); net->ct.auto_assign_helper_warned = 1; return NULL; @@ -228,7 +228,6 @@ nf_ct_lookup_helper(struct nf_conn *ct, struct net *net) return __nf_ct_helper_find(&ct->tuplehash[IP_CT_DIR_REPLY].tuple); } - int __nf_ct_try_assign_helper(struct nf_conn *ct, struct nf_conn *tmpl, gfp_t flags) { diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index 1469365bac7e..1d519b0e51a5 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -2962,6 +2962,7 @@ static int ctnetlink_exp_dump_mask(struct sk_buff *skb, memset(&m, 0xFF, sizeof(m)); memcpy(&m.src.u3, &mask->src.u3, sizeof(m.src.u3)); m.src.u.all = mask->src.u.all; + m.src.l3num = tuple->src.l3num; m.dst.protonum = tuple->dst.protonum; nest_parms = nla_nest_start(skb, CTA_EXPECT_MASK); diff --git a/net/netfilter/nf_conntrack_proto_gre.c b/net/netfilter/nf_conntrack_proto_gre.c index 5b05487a60d2..db11e403d818 100644 --- a/net/netfilter/nf_conntrack_proto_gre.c +++ b/net/netfilter/nf_conntrack_proto_gre.c @@ -218,9 +218,6 @@ int nf_conntrack_gre_packet(struct nf_conn *ct, enum ip_conntrack_info ctinfo, const struct nf_hook_state *state) { - if (state->pf != NFPROTO_IPV4) - return -NF_ACCEPT; - if (!nf_ct_is_confirmed(ct)) { unsigned int *timeouts = nf_ct_timeout_lookup(ct); diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c index 1d7e1c595546..ec23330687a5 100644 --- a/net/netfilter/nf_conntrack_proto_tcp.c +++ b/net/netfilter/nf_conntrack_proto_tcp.c @@ -982,8 +982,10 @@ int nf_conntrack_tcp_packet(struct nf_conn *ct, IP_CT_EXP_CHALLENGE_ACK; } spin_unlock_bh(&ct->lock); - nf_ct_l4proto_log_invalid(skb, ct, "invalid packet ignored in " - "state %s ", tcp_conntrack_names[old_state]); + nf_ct_l4proto_log_invalid(skb, ct, + "packet (index %d) in dir %d ignored, state %s", + index, dir, + tcp_conntrack_names[old_state]); return NF_ACCEPT; case TCP_CONNTRACK_MAX: /* Special case for SYN proxy: when the SYN to the server or diff --git a/net/netfilter/nf_conntrack_standalone.c b/net/netfilter/nf_conntrack_standalone.c index 0ee702d374b0..c6c0cb465664 100644 --- a/net/netfilter/nf_conntrack_standalone.c +++ b/net/netfilter/nf_conntrack_standalone.c @@ -266,6 +266,7 @@ static const char* l4proto_name(u16 proto) case IPPROTO_GRE: return "gre"; case IPPROTO_SCTP: return "sctp"; case IPPROTO_UDPLITE: return "udplite"; + case IPPROTO_ICMPV6: return "icmpv6"; } return "unknown"; diff --git a/net/netfilter/nf_flow_table_core.c b/net/netfilter/nf_flow_table_core.c index 5fa657b8e03d..c77ba8690ed8 100644 --- a/net/netfilter/nf_flow_table_core.c +++ b/net/netfilter/nf_flow_table_core.c @@ -506,7 +506,7 @@ int nf_flow_table_init(struct nf_flowtable *flowtable) { int err; - INIT_DEFERRABLE_WORK(&flowtable->gc_work, nf_flow_offload_work_gc); + INIT_DELAYED_WORK(&flowtable->gc_work, nf_flow_offload_work_gc); flow_block_init(&flowtable->flow_block); init_rwsem(&flowtable->flow_block_lock); diff --git a/net/netfilter/nf_flow_table_offload.c b/net/netfilter/nf_flow_table_offload.c index 2a6993fa40d7..1c5460e7bce8 100644 --- a/net/netfilter/nf_flow_table_offload.c +++ b/net/netfilter/nf_flow_table_offload.c @@ -305,12 +305,12 @@ static void flow_offload_ipv6_mangle(struct nf_flow_rule *flow_rule, const __be32 *addr, const __be32 *mask) { struct flow_action_entry *entry; - int i; + int i, j; - for (i = 0; i < sizeof(struct in6_addr) / sizeof(u32); i += sizeof(u32)) { + for (i = 0, j = 0; i < sizeof(struct in6_addr) / sizeof(u32); i += sizeof(u32), j++) { entry = flow_action_entry_next(flow_rule); flow_offload_mangle(entry, FLOW_ACT_MANGLE_HDR_TYPE_IP6, - offset + i, &addr[i], mask); + offset + i, &addr[j], mask); } } diff --git a/net/netfilter/nf_nat_proto.c b/net/netfilter/nf_nat_proto.c index e87b6bd6b3cd..4731d21fc3ad 100644 --- a/net/netfilter/nf_nat_proto.c +++ b/net/netfilter/nf_nat_proto.c @@ -646,8 +646,8 @@ nf_nat_ipv4_fn(void *priv, struct sk_buff *skb, } static unsigned int -nf_nat_ipv4_in(void *priv, struct sk_buff *skb, - const struct nf_hook_state *state) +nf_nat_ipv4_pre_routing(void *priv, struct sk_buff *skb, + const struct nf_hook_state *state) { unsigned int ret; __be32 daddr = ip_hdr(skb)->daddr; @@ -660,6 +660,23 @@ nf_nat_ipv4_in(void *priv, struct sk_buff *skb, } static unsigned int +nf_nat_ipv4_local_in(void *priv, struct sk_buff *skb, + const struct nf_hook_state *state) +{ + __be32 saddr = ip_hdr(skb)->saddr; + struct sock *sk = skb->sk; + unsigned int ret; + + ret = nf_nat_ipv4_fn(priv, skb, state); + + if (ret == NF_ACCEPT && sk && saddr != ip_hdr(skb)->saddr && + !inet_sk_transparent(sk)) + skb_orphan(skb); /* TCP edemux obtained wrong socket */ + + return ret; +} + +static unsigned int nf_nat_ipv4_out(void *priv, struct sk_buff *skb, const struct nf_hook_state *state) { @@ -736,7 +753,7 @@ nf_nat_ipv4_local_fn(void *priv, struct sk_buff *skb, static const struct nf_hook_ops nf_nat_ipv4_ops[] = { /* Before packet filtering, change destination */ { - .hook = nf_nat_ipv4_in, + .hook = nf_nat_ipv4_pre_routing, .pf = NFPROTO_IPV4, .hooknum = NF_INET_PRE_ROUTING, .priority = NF_IP_PRI_NAT_DST, @@ -757,7 +774,7 @@ static const struct nf_hook_ops nf_nat_ipv4_ops[] = { }, /* After packet filtering, change source */ { - .hook = nf_nat_ipv4_fn, + .hook = nf_nat_ipv4_local_in, .pf = NFPROTO_IPV4, .hooknum = NF_INET_LOCAL_IN, .priority = NF_IP_PRI_NAT_SRC, diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index c1eb5cdb3033..589d2f6978d3 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -916,6 +916,12 @@ static int nf_tables_updtable(struct nft_ctx *ctx) if (flags == ctx->table->flags) return 0; + if ((nft_table_has_owner(ctx->table) && + !(flags & NFT_TABLE_F_OWNER)) || + (!nft_table_has_owner(ctx->table) && + flags & NFT_TABLE_F_OWNER)) + return -EOPNOTSUPP; + trans = nft_trans_alloc(ctx, NFT_MSG_NEWTABLE, sizeof(struct nft_trans_table)); if (trans == NULL) @@ -5289,16 +5295,35 @@ err_expr: return -ENOMEM; } -static void nft_set_elem_expr_setup(const struct nft_set_ext *ext, int i, - struct nft_expr *expr_array[]) +static int nft_set_elem_expr_setup(struct nft_ctx *ctx, + const struct nft_set_ext *ext, + struct nft_expr *expr_array[], + u32 num_exprs) { struct nft_set_elem_expr *elem_expr = nft_set_ext_expr(ext); - struct nft_expr *expr = nft_setelem_expr_at(elem_expr, elem_expr->size); + struct nft_expr *expr; + int i, err; + + for (i = 0; i < num_exprs; i++) { + expr = nft_setelem_expr_at(elem_expr, elem_expr->size); + err = nft_expr_clone(expr, expr_array[i]); + if (err < 0) + goto err_elem_expr_setup; + + elem_expr->size += expr_array[i]->ops->size; + nft_expr_destroy(ctx, expr_array[i]); + expr_array[i] = NULL; + } + + return 0; - memcpy(expr, expr_array[i], expr_array[i]->ops->size); - elem_expr->size += expr_array[i]->ops->size; - kfree(expr_array[i]); - expr_array[i] = NULL; +err_elem_expr_setup: + for (; i < num_exprs; i++) { + nft_expr_destroy(ctx, expr_array[i]); + expr_array[i] = NULL; + } + + return -ENOMEM; } static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, @@ -5550,12 +5575,15 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, *nft_set_ext_obj(ext) = obj; obj->use++; } - for (i = 0; i < num_exprs; i++) - nft_set_elem_expr_setup(ext, i, expr_array); + err = nft_set_elem_expr_setup(ctx, ext, expr_array, num_exprs); + if (err < 0) + goto err_elem_expr; trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set); - if (trans == NULL) - goto err_trans; + if (trans == NULL) { + err = -ENOMEM; + goto err_elem_expr; + } ext->genmask = nft_genmask_cur(ctx->net) | NFT_SET_ELEM_BUSY_MASK; err = set->ops->insert(ctx->net, set, &elem, &ext2); @@ -5599,7 +5627,7 @@ err_set_full: set->ops->remove(ctx->net, set, &elem); err_element_clash: kfree(trans); -err_trans: +err_elem_expr: if (obj) obj->use--; @@ -6777,6 +6805,9 @@ static int nft_register_flowtable_net_hooks(struct net *net, list_for_each_entry(hook, hook_list, list) { list_for_each_entry(ft, &table->flowtables, list) { + if (!nft_is_active_next(net, ft)) + continue; + list_for_each_entry(hook2, &ft->hook_list, list) { if (hook->ops.dev == hook2->ops.dev && hook->ops.pf == hook2->ops.pf) { @@ -6836,6 +6867,7 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh, struct nft_hook *hook, *next; struct nft_trans *trans; bool unregister = false; + u32 flags; int err; err = nft_flowtable_parse_hook(ctx, nla[NFTA_FLOWTABLE_HOOK], @@ -6850,6 +6882,17 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh, } } + if (nla[NFTA_FLOWTABLE_FLAGS]) { + flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS])); + if (flags & ~NFT_FLOWTABLE_MASK) + return -EOPNOTSUPP; + if ((flowtable->data.flags & NFT_FLOWTABLE_HW_OFFLOAD) ^ + (flags & NFT_FLOWTABLE_HW_OFFLOAD)) + return -EOPNOTSUPP; + } else { + flags = flowtable->data.flags; + } + err = nft_register_flowtable_net_hooks(ctx->net, ctx->table, &flowtable_hook.list, flowtable); if (err < 0) @@ -6863,6 +6906,7 @@ static int nft_flowtable_update(struct nft_ctx *ctx, const struct nlmsghdr *nlh, goto err_flowtable_update_hook; } + nft_trans_flowtable_flags(trans) = flags; nft_trans_flowtable(trans) = flowtable; nft_trans_flowtable_update(trans) = true; INIT_LIST_HEAD(&nft_trans_flowtable_hooks(trans)); @@ -6957,8 +7001,10 @@ static int nf_tables_newflowtable(struct net *net, struct sock *nlsk, if (nla[NFTA_FLOWTABLE_FLAGS]) { flowtable->data.flags = ntohl(nla_get_be32(nla[NFTA_FLOWTABLE_FLAGS])); - if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) + if (flowtable->data.flags & ~NFT_FLOWTABLE_MASK) { + err = -EOPNOTSUPP; goto err3; + } } write_pnet(&flowtable->data.net, net); @@ -8170,6 +8216,8 @@ static int nf_tables_commit(struct net *net, struct sk_buff *skb) break; case NFT_MSG_NEWFLOWTABLE: if (nft_trans_flowtable_update(trans)) { + nft_trans_flowtable(trans)->data.flags = + nft_trans_flowtable_flags(trans); nf_tables_flowtable_notify(&trans->ctx, nft_trans_flowtable(trans), &nft_trans_flowtable_hooks(trans), @@ -9022,8 +9070,12 @@ static void __nft_release_hooks(struct net *net) { struct nft_table *table; - list_for_each_entry(table, &net->nft.tables, list) + list_for_each_entry(table, &net->nft.tables, list) { + if (nft_table_has_owner(table)) + continue; + __nft_release_hook(net, table); + } } static void __nft_release_table(struct net *net, struct nft_table *table) @@ -9073,13 +9125,12 @@ static void __nft_release_table(struct net *net, struct nft_table *table) nf_tables_table_destroy(&ctx); } -static void __nft_release_tables(struct net *net, u32 nlpid) +static void __nft_release_tables(struct net *net) { struct nft_table *table, *nt; list_for_each_entry_safe(table, nt, &net->nft.tables, list) { - if (nft_table_has_owner(table) && - nlpid != table->nlpid) + if (nft_table_has_owner(table)) continue; __nft_release_table(net, table); @@ -9145,7 +9196,7 @@ static void __net_exit nf_tables_exit_net(struct net *net) mutex_lock(&net->nft.commit_mutex); if (!list_empty(&net->nft.commit_list)) __nf_tables_abort(net, NFNL_ABORT_NONE); - __nft_release_tables(net, 0); + __nft_release_tables(net); mutex_unlock(&net->nft.commit_mutex); WARN_ON_ONCE(!list_empty(&net->nft.tables)); WARN_ON_ONCE(!list_empty(&net->nft.module_list)); diff --git a/net/netfilter/nft_limit.c b/net/netfilter/nft_limit.c index 0e2c315c3b5e..82ec27bdf941 100644 --- a/net/netfilter/nft_limit.c +++ b/net/netfilter/nft_limit.c @@ -76,13 +76,13 @@ static int nft_limit_init(struct nft_limit *limit, return -EOVERFLOW; if (pkts) { - tokens = div_u64(limit->nsecs, limit->rate) * limit->burst; + tokens = div64_u64(limit->nsecs, limit->rate) * limit->burst; } else { /* The token bucket size limits the number of tokens can be * accumulated. tokens_max specifies the bucket size. * tokens_max = unit * (rate + burst) / rate. */ - tokens = div_u64(limit->nsecs * (limit->rate + limit->burst), + tokens = div64_u64(limit->nsecs * (limit->rate + limit->burst), limit->rate); } diff --git a/net/netfilter/x_tables.c b/net/netfilter/x_tables.c index acce622582e3..92e9d4ebc5e8 100644 --- a/net/netfilter/x_tables.c +++ b/net/netfilter/x_tables.c @@ -330,6 +330,7 @@ static int match_revfn(u8 af, const char *name, u8 revision, int *bestp) const struct xt_match *m; int have_rev = 0; + mutex_lock(&xt[af].mutex); list_for_each_entry(m, &xt[af].match, list) { if (strcmp(m->name, name) == 0) { if (m->revision > *bestp) @@ -338,6 +339,7 @@ static int match_revfn(u8 af, const char *name, u8 revision, int *bestp) have_rev = 1; } } + mutex_unlock(&xt[af].mutex); if (af != NFPROTO_UNSPEC && !have_rev) return match_revfn(NFPROTO_UNSPEC, name, revision, bestp); @@ -350,6 +352,7 @@ static int target_revfn(u8 af, const char *name, u8 revision, int *bestp) const struct xt_target *t; int have_rev = 0; + mutex_lock(&xt[af].mutex); list_for_each_entry(t, &xt[af].target, list) { if (strcmp(t->name, name) == 0) { if (t->revision > *bestp) @@ -358,6 +361,7 @@ static int target_revfn(u8 af, const char *name, u8 revision, int *bestp) have_rev = 1; } } + mutex_unlock(&xt[af].mutex); if (af != NFPROTO_UNSPEC && !have_rev) return target_revfn(NFPROTO_UNSPEC, name, revision, bestp); @@ -371,12 +375,10 @@ int xt_find_revision(u8 af, const char *name, u8 revision, int target, { int have_rev, best = -1; - mutex_lock(&xt[af].mutex); if (target == 1) have_rev = target_revfn(af, name, revision, &best); else have_rev = match_revfn(af, name, revision, &best); - mutex_unlock(&xt[af].mutex); /* Nothing at all? Return 0 to try loading module. */ if (best == -1) { @@ -731,7 +733,7 @@ void xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr, { const struct xt_match *match = m->u.kernel.match; struct compat_xt_entry_match *cm = (struct compat_xt_entry_match *)m; - int pad, off = xt_compat_match_offset(match); + int off = xt_compat_match_offset(match); u_int16_t msize = cm->u.user.match_size; char name[sizeof(m->u.user.name)]; @@ -741,9 +743,6 @@ void xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr, match->compat_from_user(m->data, cm->data); else memcpy(m->data, cm->data, msize - sizeof(*cm)); - pad = XT_ALIGN(match->matchsize) - match->matchsize; - if (pad > 0) - memset(m->data + match->matchsize, 0, pad); msize += off; m->u.user.match_size = msize; @@ -1114,7 +1113,7 @@ void xt_compat_target_from_user(struct xt_entry_target *t, void **dstptr, { const struct xt_target *target = t->u.kernel.target; struct compat_xt_entry_target *ct = (struct compat_xt_entry_target *)t; - int pad, off = xt_compat_target_offset(target); + int off = xt_compat_target_offset(target); u_int16_t tsize = ct->u.user.target_size; char name[sizeof(t->u.user.name)]; @@ -1124,9 +1123,6 @@ void xt_compat_target_from_user(struct xt_entry_target *t, void **dstptr, target->compat_from_user(t->data, ct->data); else memcpy(t->data, ct->data, tsize - sizeof(*ct)); - pad = XT_ALIGN(target->targetsize) - target->targetsize; - if (pad > 0) - memset(t->data + target->targetsize, 0, pad); tsize += off; t->u.user.target_size = tsize; @@ -1349,14 +1345,6 @@ struct xt_counters *xt_counters_alloc(unsigned int counters) } EXPORT_SYMBOL(xt_counters_alloc); -struct xt_table_info -*xt_table_get_private_protected(const struct xt_table *table) -{ - return rcu_dereference_protected(table->private, - mutex_is_locked(&xt[table->af].mutex)); -} -EXPORT_SYMBOL(xt_table_get_private_protected); - struct xt_table_info * xt_replace_table(struct xt_table *table, unsigned int num_counters, @@ -1364,6 +1352,7 @@ xt_replace_table(struct xt_table *table, int *error) { struct xt_table_info *private; + unsigned int cpu; int ret; ret = xt_jumpstack_alloc(newinfo); @@ -1373,20 +1362,47 @@ xt_replace_table(struct xt_table *table, } /* Do the substitution. */ - private = xt_table_get_private_protected(table); + local_bh_disable(); + private = table->private; /* Check inside lock: is the old number correct? */ if (num_counters != private->number) { pr_debug("num_counters != table->private->number (%u/%u)\n", num_counters, private->number); + local_bh_enable(); *error = -EAGAIN; return NULL; } newinfo->initial_entries = private->initial_entries; + /* + * Ensure contents of newinfo are visible before assigning to + * private. + */ + smp_wmb(); + table->private = newinfo; - rcu_assign_pointer(table->private, newinfo); - synchronize_rcu(); + /* make sure all cpus see new ->private value */ + smp_mb(); + + /* + * Even though table entries have now been swapped, other CPU's + * may still be using the old entries... + */ + local_bh_enable(); + + /* ... so wait for even xt_recseq on all cpus */ + for_each_possible_cpu(cpu) { + seqcount_t *s = &per_cpu(xt_recseq, cpu); + u32 seq = raw_read_seqcount(s); + + if (seq & 1) { + do { + cond_resched(); + cpu_relax(); + } while (seq == raw_read_seqcount(s)); + } + } audit_log_nfcfg(table->name, table->af, private->number, !private->number ? AUDIT_XT_OP_REGISTER : @@ -1422,12 +1438,12 @@ struct xt_table *xt_register_table(struct net *net, } /* Simplifies replace_table code. */ - rcu_assign_pointer(table->private, bootstrap); + table->private = bootstrap; if (!xt_replace_table(table, 0, newinfo, &ret)) goto unlock; - private = xt_table_get_private_protected(table); + private = table->private; pr_debug("table->private->number = %u\n", private->number); /* save number of initial entries */ @@ -1450,8 +1466,7 @@ void *xt_unregister_table(struct xt_table *table) struct xt_table_info *private; mutex_lock(&xt[table->af].mutex); - private = xt_table_get_private_protected(table); - RCU_INIT_POINTER(table->private, NULL); + private = table->private; list_del(&table->list); mutex_unlock(&xt[table->af].mutex); audit_log_nfcfg(table->name, table->af, private->number, |