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Diffstat (limited to 'net/ipv4/tcp.c')
-rw-r--r--net/ipv4/tcp.c84
1 files changed, 33 insertions, 51 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 810cc164f795..c06d2bfd2ec4 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -2691,6 +2691,9 @@ int tcp_disconnect(struct sock *sk, int flags)
tp->window_clamp = 0;
tp->delivered = 0;
tp->delivered_ce = 0;
+ if (icsk->icsk_ca_ops->release)
+ icsk->icsk_ca_ops->release(sk);
+ memset(icsk->icsk_ca_priv, 0, sizeof(icsk->icsk_ca_priv));
tcp_set_ca_state(sk, TCP_CA_Open);
tp->is_sack_reneg = 0;
tcp_clear_retrans(tp);
@@ -2761,7 +2764,7 @@ static inline bool tcp_can_repair_sock(const struct sock *sk)
(sk->sk_state != TCP_LISTEN);
}
-static int tcp_repair_set_window(struct tcp_sock *tp, char __user *optbuf, int len)
+static int tcp_repair_set_window(struct tcp_sock *tp, sockptr_t optbuf, int len)
{
struct tcp_repair_window opt;
@@ -2771,7 +2774,7 @@ static int tcp_repair_set_window(struct tcp_sock *tp, char __user *optbuf, int l
if (len != sizeof(opt))
return -EINVAL;
- if (copy_from_user(&opt, optbuf, sizeof(opt)))
+ if (copy_from_sockptr(&opt, optbuf, sizeof(opt)))
return -EFAULT;
if (opt.max_window < opt.snd_wnd)
@@ -2793,17 +2796,18 @@ static int tcp_repair_set_window(struct tcp_sock *tp, char __user *optbuf, int l
return 0;
}
-static int tcp_repair_options_est(struct sock *sk,
- struct tcp_repair_opt __user *optbuf, unsigned int len)
+static int tcp_repair_options_est(struct sock *sk, sockptr_t optbuf,
+ unsigned int len)
{
struct tcp_sock *tp = tcp_sk(sk);
struct tcp_repair_opt opt;
+ size_t offset = 0;
while (len >= sizeof(opt)) {
- if (copy_from_user(&opt, optbuf, sizeof(opt)))
+ if (copy_from_sockptr_offset(&opt, optbuf, offset, sizeof(opt)))
return -EFAULT;
- optbuf++;
+ offset += sizeof(opt);
len -= sizeof(opt);
switch (opt.opt_code) {
@@ -2957,7 +2961,7 @@ void tcp_sock_set_user_timeout(struct sock *sk, u32 val)
}
EXPORT_SYMBOL(tcp_sock_set_user_timeout);
-static int __tcp_sock_set_keepidle(struct sock *sk, int val)
+int tcp_sock_set_keepidle_locked(struct sock *sk, int val)
{
struct tcp_sock *tp = tcp_sk(sk);
@@ -2984,7 +2988,7 @@ int tcp_sock_set_keepidle(struct sock *sk, int val)
int err;
lock_sock(sk);
- err = __tcp_sock_set_keepidle(sk, val);
+ err = tcp_sock_set_keepidle_locked(sk, val);
release_sock(sk);
return err;
}
@@ -3017,8 +3021,8 @@ EXPORT_SYMBOL(tcp_sock_set_keepcnt);
/*
* Socket option code for TCP.
*/
-static int do_tcp_setsockopt(struct sock *sk, int level,
- int optname, char __user *optval, unsigned int optlen)
+static int do_tcp_setsockopt(struct sock *sk, int level, int optname,
+ sockptr_t optval, unsigned int optlen)
{
struct tcp_sock *tp = tcp_sk(sk);
struct inet_connection_sock *icsk = inet_csk(sk);
@@ -3034,7 +3038,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
if (optlen < 1)
return -EINVAL;
- val = strncpy_from_user(name, optval,
+ val = strncpy_from_sockptr(name, optval,
min_t(long, TCP_CA_NAME_MAX-1, optlen));
if (val < 0)
return -EFAULT;
@@ -3053,7 +3057,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
if (optlen < 1)
return -EINVAL;
- val = strncpy_from_user(name, optval,
+ val = strncpy_from_sockptr(name, optval,
min_t(long, TCP_ULP_NAME_MAX - 1,
optlen));
if (val < 0)
@@ -3076,7 +3080,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
optlen != TCP_FASTOPEN_KEY_BUF_LENGTH)
return -EINVAL;
- if (copy_from_user(key, optval, optlen))
+ if (copy_from_sockptr(key, optval, optlen))
return -EFAULT;
if (optlen == TCP_FASTOPEN_KEY_BUF_LENGTH)
@@ -3092,7 +3096,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
if (optlen < sizeof(int))
return -EINVAL;
- if (get_user(val, (int __user *)optval))
+ if (copy_from_sockptr(&val, optval, sizeof(val)))
return -EFAULT;
lock_sock(sk);
@@ -3171,9 +3175,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
if (!tp->repair)
err = -EINVAL;
else if (sk->sk_state == TCP_ESTABLISHED)
- err = tcp_repair_options_est(sk,
- (struct tcp_repair_opt __user *)optval,
- optlen);
+ err = tcp_repair_options_est(sk, optval, optlen);
else
err = -EPERM;
break;
@@ -3183,7 +3185,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
break;
case TCP_KEEPIDLE:
- err = __tcp_sock_set_keepidle(sk, val);
+ err = tcp_sock_set_keepidle_locked(sk, val);
break;
case TCP_KEEPINTVL:
if (val < 1 || val > MAX_TCP_KEEPINTVL)
@@ -3246,10 +3248,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
#ifdef CONFIG_TCP_MD5SIG
case TCP_MD5SIG:
case TCP_MD5SIG_EXT:
- if ((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_LISTEN))
- err = tp->af_specific->md5_parse(sk, optname, optval, optlen);
- else
- err = -EINVAL;
+ err = tp->af_specific->md5_parse(sk, optname, optval, optlen);
break;
#endif
case TCP_USER_TIMEOUT:
@@ -3325,7 +3324,7 @@ static int do_tcp_setsockopt(struct sock *sk, int level,
return err;
}
-int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
+int tcp_setsockopt(struct sock *sk, int level, int optname, sockptr_t optval,
unsigned int optlen)
{
const struct inet_connection_sock *icsk = inet_csk(sk);
@@ -3337,18 +3336,6 @@ int tcp_setsockopt(struct sock *sk, int level, int optname, char __user *optval,
}
EXPORT_SYMBOL(tcp_setsockopt);
-#ifdef CONFIG_COMPAT
-int compat_tcp_setsockopt(struct sock *sk, int level, int optname,
- char __user *optval, unsigned int optlen)
-{
- if (level != SOL_TCP)
- return inet_csk_compat_setsockopt(sk, level, optname,
- optval, optlen);
- return do_tcp_setsockopt(sk, level, optname, optval, optlen);
-}
-EXPORT_SYMBOL(compat_tcp_setsockopt);
-#endif
-
static void tcp_get_info_chrono_stats(const struct tcp_sock *tp,
struct tcp_info *info)
{
@@ -3514,10 +3501,12 @@ static size_t tcp_opt_stats_get_size(void)
nla_total_size(sizeof(u32)) + /* TCP_NLA_SRTT */
nla_total_size(sizeof(u16)) + /* TCP_NLA_TIMEOUT_REHASH */
nla_total_size(sizeof(u32)) + /* TCP_NLA_BYTES_NOTSENT */
+ nla_total_size_64bit(sizeof(u64)) + /* TCP_NLA_EDT */
0;
}
-struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk)
+struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk,
+ const struct sk_buff *orig_skb)
{
const struct tcp_sock *tp = tcp_sk(sk);
struct sk_buff *stats;
@@ -3571,6 +3560,8 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk)
nla_put_u16(stats, TCP_NLA_TIMEOUT_REHASH, tp->timeout_rehash);
nla_put_u32(stats, TCP_NLA_BYTES_NOTSENT,
max_t(int, 0, tp->write_seq - tp->snd_nxt));
+ nla_put_u64_64bit(stats, TCP_NLA_EDT, orig_skb->skb_mstamp_ns,
+ TCP_NLA_PAD);
return stats;
}
@@ -3896,18 +3887,6 @@ int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval,
}
EXPORT_SYMBOL(tcp_getsockopt);
-#ifdef CONFIG_COMPAT
-int compat_tcp_getsockopt(struct sock *sk, int level, int optname,
- char __user *optval, int __user *optlen)
-{
- if (level != SOL_TCP)
- return inet_csk_compat_getsockopt(sk, level, optname,
- optval, optlen);
- return do_tcp_getsockopt(sk, level, optname, optval, optlen);
-}
-EXPORT_SYMBOL(compat_tcp_getsockopt);
-#endif
-
#ifdef CONFIG_TCP_MD5SIG
static DEFINE_PER_CPU(struct tcp_md5sig_pool, tcp_md5sig_pool);
static DEFINE_MUTEX(tcp_md5sig_mutex);
@@ -4033,11 +4012,14 @@ EXPORT_SYMBOL(tcp_md5_hash_skb_data);
int tcp_md5_hash_key(struct tcp_md5sig_pool *hp, const struct tcp_md5sig_key *key)
{
+ u8 keylen = READ_ONCE(key->keylen); /* paired with WRITE_ONCE() in tcp_md5_do_add */
struct scatterlist sg;
- sg_init_one(&sg, key->key, key->keylen);
- ahash_request_set_crypt(hp->md5_req, &sg, NULL, key->keylen);
- return crypto_ahash_update(hp->md5_req);
+ sg_init_one(&sg, key->key, keylen);
+ ahash_request_set_crypt(hp->md5_req, &sg, NULL, keylen);
+
+ /* We use data_race() because tcp_md5_do_add() might change key->key under us */
+ return data_race(crypto_ahash_update(hp->md5_req));
}
EXPORT_SYMBOL(tcp_md5_hash_key);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.