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Diffstat (limited to 'net/ipv4/inet_diag.c')
-rw-r--r--net/ipv4/inet_diag.c92
1 files changed, 75 insertions, 17 deletions
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index 125f4f8a36b4..366a4507b5a3 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -52,6 +52,11 @@ static DEFINE_MUTEX(inet_diag_table_mutex);
static const struct inet_diag_handler *inet_diag_lock_handler(int proto)
{
+ if (proto < 0 || proto >= IPPROTO_MAX) {
+ mutex_lock(&inet_diag_table_mutex);
+ return ERR_PTR(-ENOENT);
+ }
+
if (!inet_diag_table[proto])
sock_load_diag_module(AF_INET, proto);
@@ -120,6 +125,7 @@ int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
bool net_admin)
{
const struct inet_sock *inet = inet_sk(sk);
+ struct inet_diag_sockopt inet_sockopt;
if (nla_put_u8(skb, INET_DIAG_SHUTDOWN, sk->sk_shutdown))
goto errout;
@@ -175,12 +181,54 @@ int inet_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
r->idiag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
r->idiag_inode = sock_i_ino(sk);
+ memset(&inet_sockopt, 0, sizeof(inet_sockopt));
+ inet_sockopt.recverr = inet->recverr;
+ inet_sockopt.is_icsk = inet->is_icsk;
+ inet_sockopt.freebind = inet->freebind;
+ inet_sockopt.hdrincl = inet->hdrincl;
+ inet_sockopt.mc_loop = inet->mc_loop;
+ inet_sockopt.transparent = inet->transparent;
+ inet_sockopt.mc_all = inet->mc_all;
+ inet_sockopt.nodefrag = inet->nodefrag;
+ inet_sockopt.bind_address_no_port = inet->bind_address_no_port;
+ inet_sockopt.recverr_rfc4884 = inet->recverr_rfc4884;
+ inet_sockopt.defer_connect = inet->defer_connect;
+ if (nla_put(skb, INET_DIAG_SOCKOPT, sizeof(inet_sockopt),
+ &inet_sockopt))
+ goto errout;
+
return 0;
errout:
return 1;
}
EXPORT_SYMBOL_GPL(inet_diag_msg_attrs_fill);
+static int inet_diag_parse_attrs(const struct nlmsghdr *nlh, int hdrlen,
+ struct nlattr **req_nlas)
+{
+ struct nlattr *nla;
+ int remaining;
+
+ nlmsg_for_each_attr(nla, nlh, hdrlen, remaining) {
+ int type = nla_type(nla);
+
+ if (type == INET_DIAG_REQ_PROTOCOL && nla_len(nla) != sizeof(u32))
+ return -EINVAL;
+
+ if (type < __INET_DIAG_REQ_MAX)
+ req_nlas[type] = nla;
+ }
+ return 0;
+}
+
+static int inet_diag_get_protocol(const struct inet_diag_req_v2 *req,
+ const struct inet_diag_dump_data *data)
+{
+ if (data->req_nlas[INET_DIAG_REQ_PROTOCOL])
+ return nla_get_u32(data->req_nlas[INET_DIAG_REQ_PROTOCOL]);
+ return req->sdiag_protocol;
+}
+
#define MAX_DUMP_ALLOC_SIZE (KMALLOC_MAX_SIZE - SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
@@ -198,7 +246,7 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
void *info = NULL;
cb_data = cb->data;
- handler = inet_diag_table[req->sdiag_protocol];
+ handler = inet_diag_table[inet_diag_get_protocol(req, cb_data)];
BUG_ON(!handler);
nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
@@ -539,20 +587,28 @@ EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
static int inet_diag_cmd_exact(int cmd, struct sk_buff *in_skb,
const struct nlmsghdr *nlh,
+ int hdrlen,
const struct inet_diag_req_v2 *req)
{
const struct inet_diag_handler *handler;
- int err;
+ struct inet_diag_dump_data dump_data;
+ int err, protocol;
- handler = inet_diag_lock_handler(req->sdiag_protocol);
+ memset(&dump_data, 0, sizeof(dump_data));
+ err = inet_diag_parse_attrs(nlh, hdrlen, dump_data.req_nlas);
+ if (err)
+ return err;
+
+ protocol = inet_diag_get_protocol(req, &dump_data);
+
+ handler = inet_diag_lock_handler(protocol);
if (IS_ERR(handler)) {
err = PTR_ERR(handler);
} else if (cmd == SOCK_DIAG_BY_FAMILY) {
- struct inet_diag_dump_data empty_dump_data = {};
struct netlink_callback cb = {
.nlh = nlh,
.skb = in_skb,
- .data = &empty_dump_data,
+ .data = &dump_data,
};
err = handler->dump_one(&cb, req);
} else if (cmd == SOCK_DESTROY && handler->destroy) {
@@ -1103,13 +1159,16 @@ EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
const struct inet_diag_req_v2 *r)
{
+ struct inet_diag_dump_data *cb_data = cb->data;
const struct inet_diag_handler *handler;
u32 prev_min_dump_alloc;
- int err = 0;
+ int protocol, err = 0;
+
+ protocol = inet_diag_get_protocol(r, cb_data);
again:
prev_min_dump_alloc = cb->min_dump_alloc;
- handler = inet_diag_lock_handler(r->sdiag_protocol);
+ handler = inet_diag_lock_handler(protocol);
if (!IS_ERR(handler))
handler->dump(skb, cb, r);
else
@@ -1139,20 +1198,17 @@ static int __inet_diag_dump_start(struct netlink_callback *cb, int hdrlen)
struct inet_diag_dump_data *cb_data;
struct sk_buff *skb = cb->skb;
struct nlattr *nla;
- int rem, err;
+ int err;
cb_data = kzalloc(sizeof(*cb_data), GFP_KERNEL);
if (!cb_data)
return -ENOMEM;
- nla_for_each_attr(nla, nlmsg_attrdata(nlh, hdrlen),
- nlmsg_attrlen(nlh, hdrlen), rem) {
- int type = nla_type(nla);
-
- if (type < __INET_DIAG_REQ_MAX)
- cb_data->req_nlas[type] = nla;
+ err = inet_diag_parse_attrs(nlh, hdrlen, cb_data->req_nlas);
+ if (err) {
+ kfree(cb_data);
+ return err;
}
-
nla = cb_data->inet_diag_nla_bc;
if (nla) {
err = inet_diag_bc_audit(nla, skb);
@@ -1237,7 +1293,8 @@ static int inet_diag_get_exact_compat(struct sk_buff *in_skb,
req.idiag_states = rc->idiag_states;
req.id = rc->id;
- return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh, &req);
+ return inet_diag_cmd_exact(SOCK_DIAG_BY_FAMILY, in_skb, nlh,
+ sizeof(struct inet_diag_req), &req);
}
static int inet_diag_rcv_msg_compat(struct sk_buff *skb, struct nlmsghdr *nlh)
@@ -1279,7 +1336,8 @@ static int inet_diag_handler_cmd(struct sk_buff *skb, struct nlmsghdr *h)
return netlink_dump_start(net->diag_nlsk, skb, h, &c);
}
- return inet_diag_cmd_exact(h->nlmsg_type, skb, h, nlmsg_data(h));
+ return inet_diag_cmd_exact(h->nlmsg_type, skb, h, hdrlen,
+ nlmsg_data(h));
}
static
generated by cgit v1.2.3-70-g09d2 (git 2.51.1) at 2025-11-02 02:01:19 +0000