From d2ccde1c8e90d38cee87a1b0309ad2827f3fd30d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Mon, 11 Dec 2023 02:45:28 +0000
Subject: [PATCH] add boot partition size
---
kernel/net/l2tp/l2tp_ppp.c | 176 ++++++++++++++++++++++++----------------------------------
1 files changed, 73 insertions(+), 103 deletions(-)
diff --git a/kernel/net/l2tp/l2tp_ppp.c b/kernel/net/l2tp/l2tp_ppp.c
index c095678..aea85f9 100644
--- a/kernel/net/l2tp/l2tp_ppp.c
+++ b/kernel/net/l2tp/l2tp_ppp.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*****************************************************************************
* Linux PPP over L2TP (PPPoX/PPPoL2TP) Sockets
*
@@ -11,11 +12,6 @@
* Based on original work by Martijn van Oosterhout <kleptog@svana.org>
*
* License:
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
*/
/* This driver handles only L2TP data frames; control frames are handled by a
@@ -121,8 +117,7 @@
int owner; /* pid that opened the socket */
struct mutex sk_lock; /* Protects .sk */
- struct sock __rcu *sk; /* Pointer to the session
- * PPPoX socket */
+ struct sock __rcu *sk; /* Pointer to the session PPPoX socket */
struct sock *__sk; /* Copy of .sk, for cleanup */
struct rcu_head rcu; /* For asynchronous release */
};
@@ -159,17 +154,20 @@
{
struct l2tp_session *session;
- if (sk == NULL)
+ if (!sk)
return NULL;
sock_hold(sk);
session = (struct l2tp_session *)(sk->sk_user_data);
- if (session == NULL) {
+ if (!session) {
sock_put(sk);
goto out;
}
-
- BUG_ON(session->magic != L2TP_SESSION_MAGIC);
+ if (WARN_ON(session->magic != L2TP_SESSION_MAGIC)) {
+ session = NULL;
+ sock_put(sk);
+ goto out;
+ }
out:
return session;
@@ -222,7 +220,7 @@
*/
rcu_read_lock();
sk = rcu_dereference(ps->sk);
- if (sk == NULL)
+ if (!sk)
goto no_sock;
/* If the first two bytes are 0xFF03, consider that it is the PPP's
@@ -239,17 +237,9 @@
if (sk->sk_state & PPPOX_BOUND) {
struct pppox_sock *po;
- l2tp_dbg(session, L2TP_MSG_DATA,
- "%s: recv %d byte data frame, passing to ppp\n",
- session->name, data_len);
-
po = pppox_sk(sk);
ppp_input(&po->chan, skb);
} else {
- l2tp_dbg(session, L2TP_MSG_DATA,
- "%s: recv %d byte data frame, passing to L2TP socket\n",
- session->name, data_len);
-
if (sock_queue_rcv_skb(sk, skb) < 0) {
atomic_long_inc(&session->stats.rx_errors);
kfree_skb(skb);
@@ -261,7 +251,7 @@
no_sock:
rcu_read_unlock();
- l2tp_info(session, L2TP_MSG_DATA, "%s: no socket\n", session->name);
+ pr_warn_ratelimited("%s: no socket in recv\n", session->name);
kfree_skb(skb);
}
@@ -290,7 +280,7 @@
/* Get session and tunnel contexts */
error = -EBADF;
session = pppol2tp_sock_to_session(sk);
- if (session == NULL)
+ if (!session)
goto error;
tunnel = session->tunnel;
@@ -326,7 +316,7 @@
}
local_bh_disable();
- l2tp_xmit_skb(session, skb, session->hdr_len);
+ l2tp_xmit_skb(session, skb);
local_bh_enable();
sock_put(sk);
@@ -355,7 +345,7 @@
*/
static int pppol2tp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
{
- struct sock *sk = (struct sock *) chan->private;
+ struct sock *sk = (struct sock *)chan->private;
struct l2tp_session *session;
struct l2tp_tunnel *tunnel;
int uhlen, headroom;
@@ -365,7 +355,7 @@
/* Get session and tunnel contexts from the socket */
session = pppol2tp_sock_to_session(sk);
- if (session == NULL)
+ if (!session)
goto abort;
tunnel = session->tunnel;
@@ -385,7 +375,7 @@
skb->data[1] = PPP_UI;
local_bh_disable();
- l2tp_xmit_skb(session, skb, session->hdr_len);
+ l2tp_xmit_skb(session, skb);
local_bh_enable();
sock_put(sk);
@@ -424,7 +414,8 @@
if (session) {
sk->sk_user_data = NULL;
- BUG_ON(session->magic != L2TP_SESSION_MAGIC);
+ if (WARN_ON(session->magic != L2TP_SESSION_MAGIC))
+ return;
l2tp_session_dec_refcount(session);
}
}
@@ -708,10 +699,9 @@
* tunnel id.
*/
if (!info.session_id && !info.peer_session_id) {
- if (tunnel == NULL) {
+ if (!tunnel) {
struct l2tp_tunnel_cfg tcfg = {
.encap = L2TP_ENCAPTYPE_UDP,
- .debug = 0,
};
/* Prevent l2tp_tunnel_register() from trying to set up
@@ -722,7 +712,7 @@
goto end;
}
- error = l2tp_tunnel_create(sock_net(sk), info.fd,
+ error = l2tp_tunnel_create(info.fd,
info.version,
info.tunnel_id,
info.peer_tunnel_id, &tcfg,
@@ -743,11 +733,11 @@
} else {
/* Error if we can't find the tunnel */
error = -ENOENT;
- if (tunnel == NULL)
+ if (!tunnel)
goto end;
/* Error if socket is not prepped */
- if (tunnel->sock == NULL)
+ if (!tunnel->sock)
goto end;
}
@@ -807,8 +797,7 @@
* the internal context for use by ioctl() and sockopt()
* handlers.
*/
- if ((session->session_id == 0) &&
- (session->peer_session_id == 0)) {
+ if (session->session_id == 0 && session->peer_session_id == 0) {
error = 0;
goto out_no_ppp;
}
@@ -842,8 +831,6 @@
drop_refcnt = false;
sk->sk_state = PPPOX_CONNECTED;
- l2tp_info(session, L2TP_MSG_CONTROL, "%s: created\n",
- session->name);
end:
if (error) {
@@ -916,22 +903,23 @@
struct pppol2tp_session *pls;
error = -ENOTCONN;
- if (sk == NULL)
+ if (!sk)
goto end;
if (!(sk->sk_state & PPPOX_CONNECTED))
goto end;
error = -EBADF;
session = pppol2tp_sock_to_session(sk);
- if (session == NULL)
+ if (!session)
goto end;
pls = l2tp_session_priv(session);
tunnel = session->tunnel;
inet = inet_sk(tunnel->sock);
- if ((tunnel->version == 2) && (tunnel->sock->sk_family == AF_INET)) {
+ if (tunnel->version == 2 && tunnel->sock->sk_family == AF_INET) {
struct sockaddr_pppol2tp sp;
+
len = sizeof(sp);
memset(&sp, 0, len);
sp.sa_family = AF_PPPOX;
@@ -947,8 +935,7 @@
sp.pppol2tp.addr.sin_addr.s_addr = inet->inet_daddr;
memcpy(uaddr, &sp, len);
#if IS_ENABLED(CONFIG_IPV6)
- } else if ((tunnel->version == 2) &&
- (tunnel->sock->sk_family == AF_INET6)) {
+ } else if (tunnel->version == 2 && tunnel->sock->sk_family == AF_INET6) {
struct sockaddr_pppol2tpin6 sp;
len = sizeof(sp);
@@ -966,8 +953,7 @@
memcpy(&sp.pppol2tp.addr.sin6_addr, &tunnel->sock->sk_v6_daddr,
sizeof(tunnel->sock->sk_v6_daddr));
memcpy(uaddr, &sp, len);
- } else if ((tunnel->version == 3) &&
- (tunnel->sock->sk_family == AF_INET6)) {
+ } else if (tunnel->version == 3 && tunnel->sock->sk_family == AF_INET6) {
struct sockaddr_pppol2tpv3in6 sp;
len = sizeof(sp);
@@ -988,6 +974,7 @@
#endif
} else if (tunnel->version == 3) {
struct sockaddr_pppol2tpv3 sp;
+
len = sizeof(sp);
memset(&sp, 0, len);
sp.sa_family = AF_PPPOX;
@@ -1070,7 +1057,6 @@
{
struct pppol2tp_ioc_stats stats;
struct l2tp_session *session;
- int val;
switch (cmd) {
case PPPIOCGMRU:
@@ -1078,6 +1064,9 @@
session = sock->sk->sk_user_data;
if (!session)
return -ENOTCONN;
+
+ if (WARN_ON(session->magic != L2TP_SESSION_MAGIC))
+ return -EBADF;
/* Not defined for tunnels */
if (!session->session_id && !session->peer_session_id)
@@ -1093,11 +1082,14 @@
if (!session)
return -ENOTCONN;
+ if (WARN_ON(session->magic != L2TP_SESSION_MAGIC))
+ return -EBADF;
+
/* Not defined for tunnels */
if (!session->session_id && !session->peer_session_id)
return -ENOSYS;
- if (get_user(val, (int __user *)arg))
+ if (!access_ok((int __user *)arg, sizeof(int)))
return -EFAULT;
break;
@@ -1105,6 +1097,9 @@
session = sock->sk->sk_user_data;
if (!session)
return -ENOTCONN;
+
+ if (WARN_ON(session->magic != L2TP_SESSION_MAGIC))
+ return -EBADF;
/* Session 0 represents the parent tunnel */
if (!session->session_id && !session->peer_session_id) {
@@ -1160,9 +1155,7 @@
switch (optname) {
case PPPOL2TP_SO_DEBUG:
- tunnel->debug = val;
- l2tp_info(tunnel, L2TP_MSG_CONTROL, "%s: set debug=%x\n",
- tunnel->name, tunnel->debug);
+ /* Tunnel debug flags option is deprecated */
break;
default:
@@ -1183,18 +1176,15 @@
switch (optname) {
case PPPOL2TP_SO_RECVSEQ:
- if ((val != 0) && (val != 1)) {
+ if (val != 0 && val != 1) {
err = -EINVAL;
break;
}
session->recv_seq = !!val;
- l2tp_info(session, L2TP_MSG_CONTROL,
- "%s: set recv_seq=%d\n",
- session->name, session->recv_seq);
break;
case PPPOL2TP_SO_SENDSEQ:
- if ((val != 0) && (val != 1)) {
+ if (val != 0 && val != 1) {
err = -EINVAL;
break;
}
@@ -1206,33 +1196,22 @@
PPPOL2TP_L2TP_HDR_SIZE_NOSEQ;
}
l2tp_session_set_header_len(session, session->tunnel->version);
- l2tp_info(session, L2TP_MSG_CONTROL,
- "%s: set send_seq=%d\n",
- session->name, session->send_seq);
break;
case PPPOL2TP_SO_LNSMODE:
- if ((val != 0) && (val != 1)) {
+ if (val != 0 && val != 1) {
err = -EINVAL;
break;
}
session->lns_mode = !!val;
- l2tp_info(session, L2TP_MSG_CONTROL,
- "%s: set lns_mode=%d\n",
- session->name, session->lns_mode);
break;
case PPPOL2TP_SO_DEBUG:
- session->debug = val;
- l2tp_info(session, L2TP_MSG_CONTROL, "%s: set debug=%x\n",
- session->name, session->debug);
+ /* Session debug flags option is deprecated */
break;
case PPPOL2TP_SO_REORDERTO:
session->reorder_timeout = msecs_to_jiffies(val);
- l2tp_info(session, L2TP_MSG_CONTROL,
- "%s: set reorder_timeout=%d\n",
- session->name, session->reorder_timeout);
break;
default:
@@ -1249,7 +1228,7 @@
* session or the special tunnel type.
*/
static int pppol2tp_setsockopt(struct socket *sock, int level, int optname,
- char __user *optval, unsigned int optlen)
+ sockptr_t optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
struct l2tp_session *session;
@@ -1263,23 +1242,22 @@
if (optlen < sizeof(int))
return -EINVAL;
- if (get_user(val, (int __user *)optval))
+ if (copy_from_sockptr(&val, optval, sizeof(int)))
return -EFAULT;
err = -ENOTCONN;
- if (sk->sk_user_data == NULL)
+ if (!sk->sk_user_data)
goto end;
/* Get session context from the socket */
err = -EBADF;
session = pppol2tp_sock_to_session(sk);
- if (session == NULL)
+ if (!session)
goto end;
/* Special case: if session_id == 0x0000, treat as operation on tunnel
*/
- if ((session->session_id == 0) &&
- (session->peer_session_id == 0)) {
+ if (session->session_id == 0 && session->peer_session_id == 0) {
tunnel = session->tunnel;
err = pppol2tp_tunnel_setsockopt(sk, tunnel, optname, val);
} else {
@@ -1301,9 +1279,8 @@
switch (optname) {
case PPPOL2TP_SO_DEBUG:
- *val = tunnel->debug;
- l2tp_info(tunnel, L2TP_MSG_CONTROL, "%s: get debug=%x\n",
- tunnel->name, tunnel->debug);
+ /* Tunnel debug flags option is deprecated */
+ *val = 0;
break;
default:
@@ -1325,32 +1302,23 @@
switch (optname) {
case PPPOL2TP_SO_RECVSEQ:
*val = session->recv_seq;
- l2tp_info(session, L2TP_MSG_CONTROL,
- "%s: get recv_seq=%d\n", session->name, *val);
break;
case PPPOL2TP_SO_SENDSEQ:
*val = session->send_seq;
- l2tp_info(session, L2TP_MSG_CONTROL,
- "%s: get send_seq=%d\n", session->name, *val);
break;
case PPPOL2TP_SO_LNSMODE:
*val = session->lns_mode;
- l2tp_info(session, L2TP_MSG_CONTROL,
- "%s: get lns_mode=%d\n", session->name, *val);
break;
case PPPOL2TP_SO_DEBUG:
- *val = session->debug;
- l2tp_info(session, L2TP_MSG_CONTROL, "%s: get debug=%d\n",
- session->name, *val);
+ /* Session debug flags option is deprecated */
+ *val = 0;
break;
case PPPOL2TP_SO_REORDERTO:
- *val = (int) jiffies_to_msecs(session->reorder_timeout);
- l2tp_info(session, L2TP_MSG_CONTROL,
- "%s: get reorder_timeout=%d\n", session->name, *val);
+ *val = (int)jiffies_to_msecs(session->reorder_timeout);
break;
default:
@@ -1386,18 +1354,17 @@
return -EINVAL;
err = -ENOTCONN;
- if (sk->sk_user_data == NULL)
+ if (!sk->sk_user_data)
goto end;
/* Get the session context */
err = -EBADF;
session = pppol2tp_sock_to_session(sk);
- if (session == NULL)
+ if (!session)
goto end;
/* Special case: if session_id == 0x0000, treat as operation on tunnel */
- if ((session->session_id == 0) &&
- (session->peer_session_id == 0)) {
+ if (session->session_id == 0 && session->peer_session_id == 0) {
tunnel = session->tunnel;
err = pppol2tp_tunnel_getsockopt(sk, tunnel, optname, &val);
if (err)
@@ -1412,7 +1379,7 @@
if (put_user(len, optlen))
goto end_put_sess;
- if (copy_to_user((void __user *) optval, &val, len))
+ if (copy_to_user((void __user *)optval, &val, len))
goto end_put_sess;
err = 0;
@@ -1468,7 +1435,7 @@
pd->session = l2tp_session_get_nth(pd->tunnel, pd->session_idx);
pd->session_idx++;
- if (pd->session == NULL) {
+ if (!pd->session) {
pd->session_idx = 0;
pppol2tp_next_tunnel(net, pd);
}
@@ -1483,17 +1450,21 @@
if (!pos)
goto out;
- BUG_ON(m->private == NULL);
+ if (WARN_ON(!m->private)) {
+ pd = NULL;
+ goto out;
+ }
+
pd = m->private;
net = seq_file_net(m);
- if (pd->tunnel == NULL)
+ if (!pd->tunnel)
pppol2tp_next_tunnel(net, pd);
else
pppol2tp_next_session(net, pd);
/* NULL tunnel and session indicates end of list */
- if ((pd->tunnel == NULL) && (pd->session == NULL))
+ if (!pd->tunnel && !pd->session)
pd = NULL;
out:
@@ -1535,7 +1506,7 @@
(tunnel == tunnel->sock->sk_user_data) ? 'Y' : 'N',
refcount_read(&tunnel->ref_count) - 1);
seq_printf(m, " %08x %ld/%ld/%ld %ld/%ld/%ld\n",
- tunnel->debug,
+ 0,
atomic_long_read(&tunnel->stats.tx_packets),
atomic_long_read(&tunnel->stats.tx_bytes),
atomic_long_read(&tunnel->stats.tx_errors),
@@ -1556,6 +1527,7 @@
if (tunnel->sock) {
struct inet_sock *inet = inet_sk(tunnel->sock);
+
ip = ntohl(inet->inet_saddr);
port = ntohs(inet->inet_sport);
}
@@ -1569,8 +1541,7 @@
user_data_ok = 'N';
}
- seq_printf(m, " SESSION '%s' %08X/%d %04X/%04X -> "
- "%04X/%04X %d %c\n",
+ seq_printf(m, " SESSION '%s' %08X/%d %04X/%04X -> %04X/%04X %d %c\n",
session->name, ip, port,
tunnel->tunnel_id,
session->session_id,
@@ -1581,7 +1552,7 @@
session->recv_seq ? 'R' : '-',
session->send_seq ? 'S' : '-',
session->lns_mode ? "LNS" : "LAC",
- session->debug,
+ 0,
jiffies_to_msecs(session->reorder_timeout));
seq_printf(m, " %hu/%hu %ld/%ld/%ld %ld/%ld/%ld\n",
session->nr, session->ns,
@@ -1609,8 +1580,7 @@
seq_puts(m, "PPPoL2TP driver info, " PPPOL2TP_DRV_VERSION "\n");
seq_puts(m, "TUNNEL name, user-data-ok session-count\n");
seq_puts(m, " debug tx-pkts/bytes/errs rx-pkts/bytes/errs\n");
- seq_puts(m, " SESSION name, addr/port src-tid/sid "
- "dest-tid/sid state user-data-ok\n");
+ seq_puts(m, " SESSION name, addr/port src-tid/sid dest-tid/sid state user-data-ok\n");
seq_puts(m, " mtu/mru/rcvseq/sendseq/lns debug reorderto\n");
seq_puts(m, " nr/ns tx-pkts/bytes/errs rx-pkts/bytes/errs\n");
goto out;
@@ -1643,7 +1613,7 @@
int err = 0;
pde = proc_create_net("pppol2tp", 0444, net->proc_net,
- &pppol2tp_seq_ops, sizeof(struct pppol2tp_seq_data));
+ &pppol2tp_seq_ops, sizeof(struct pppol2tp_seq_data));
if (!pde) {
err = -ENOMEM;
goto out;
--
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