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path: root/net/x25/af_x25.c
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Diffstat (limited to 'net/x25/af_x25.c')
-rw-r--r--net/x25/af_x25.c95
1 files changed, 57 insertions, 38 deletions
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index f7af98dff40..ad96ee90fe2 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -1357,11 +1357,11 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
void __user *argp = (void __user *)arg;
int rc;
- lock_kernel();
switch (cmd) {
case TIOCOUTQ: {
- int amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
+ int amount;
+ amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
if (amount < 0)
amount = 0;
rc = put_user(amount, (unsigned int __user *)argp);
@@ -1375,8 +1375,10 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
* These two are safe on a single CPU system as
* only user tasks fiddle here
*/
+ lock_sock(sk);
if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
amount = skb->len;
+ release_sock(sk);
rc = put_user(amount, (unsigned int __user *)argp);
break;
}
@@ -1422,9 +1424,11 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
rc = x25_subscr_ioctl(cmd, argp);
break;
case SIOCX25GFACILITIES: {
- struct x25_facilities fac = x25->facilities;
- rc = copy_to_user(argp, &fac,
- sizeof(fac)) ? -EFAULT : 0;
+ lock_sock(sk);
+ rc = copy_to_user(argp, &x25->facilities,
+ sizeof(x25->facilities))
+ ? -EFAULT : 0;
+ release_sock(sk);
break;
}
@@ -1435,18 +1439,19 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
sizeof(facilities)))
break;
rc = -EINVAL;
+ lock_sock(sk);
if (sk->sk_state != TCP_LISTEN &&
sk->sk_state != TCP_CLOSE)
- break;
+ goto out_fac_release;
if (facilities.pacsize_in < X25_PS16 ||
facilities.pacsize_in > X25_PS4096)
- break;
+ goto out_fac_release;
if (facilities.pacsize_out < X25_PS16 ||
facilities.pacsize_out > X25_PS4096)
- break;
+ goto out_fac_release;
if (facilities.winsize_in < 1 ||
facilities.winsize_in > 127)
- break;
+ goto out_fac_release;
if (facilities.throughput) {
int out = facilities.throughput & 0xf0;
int in = facilities.throughput & 0x0f;
@@ -1454,24 +1459,28 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
facilities.throughput |=
X25_DEFAULT_THROUGHPUT << 4;
else if (out < 0x30 || out > 0xD0)
- break;
+ goto out_fac_release;
if (!in)
facilities.throughput |=
X25_DEFAULT_THROUGHPUT;
else if (in < 0x03 || in > 0x0D)
- break;
+ goto out_fac_release;
}
if (facilities.reverse &&
(facilities.reverse & 0x81) != 0x81)
- break;
+ goto out_fac_release;
x25->facilities = facilities;
rc = 0;
+out_fac_release:
+ release_sock(sk);
break;
}
case SIOCX25GDTEFACILITIES: {
+ lock_sock(sk);
rc = copy_to_user(argp, &x25->dte_facilities,
sizeof(x25->dte_facilities));
+ release_sock(sk);
if (rc)
rc = -EFAULT;
break;
@@ -1483,26 +1492,31 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
if (copy_from_user(&dtefacs, argp, sizeof(dtefacs)))
break;
rc = -EINVAL;
+ lock_sock(sk);
if (sk->sk_state != TCP_LISTEN &&
sk->sk_state != TCP_CLOSE)
- break;
+ goto out_dtefac_release;
if (dtefacs.calling_len > X25_MAX_AE_LEN)
- break;
+ goto out_dtefac_release;
if (dtefacs.calling_ae == NULL)
- break;
+ goto out_dtefac_release;
if (dtefacs.called_len > X25_MAX_AE_LEN)
- break;
+ goto out_dtefac_release;
if (dtefacs.called_ae == NULL)
- break;
+ goto out_dtefac_release;
x25->dte_facilities = dtefacs;
rc = 0;
+out_dtefac_release:
+ release_sock(sk);
break;
}
case SIOCX25GCALLUSERDATA: {
- struct x25_calluserdata cud = x25->calluserdata;
- rc = copy_to_user(argp, &cud,
- sizeof(cud)) ? -EFAULT : 0;
+ lock_sock(sk);
+ rc = copy_to_user(argp, &x25->calluserdata,
+ sizeof(x25->calluserdata))
+ ? -EFAULT : 0;
+ release_sock(sk);
break;
}
@@ -1516,16 +1530,19 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
rc = -EINVAL;
if (calluserdata.cudlength > X25_MAX_CUD_LEN)
break;
+ lock_sock(sk);
x25->calluserdata = calluserdata;
+ release_sock(sk);
rc = 0;
break;
}
case SIOCX25GCAUSEDIAG: {
- struct x25_causediag causediag;
- causediag = x25->causediag;
- rc = copy_to_user(argp, &causediag,
- sizeof(causediag)) ? -EFAULT : 0;
+ lock_sock(sk);
+ rc = copy_to_user(argp, &x25->causediag,
+ sizeof(x25->causediag))
+ ? -EFAULT : 0;
+ release_sock(sk);
break;
}
@@ -1534,7 +1551,9 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
rc = -EFAULT;
if (copy_from_user(&causediag, argp, sizeof(causediag)))
break;
+ lock_sock(sk);
x25->causediag = causediag;
+ release_sock(sk);
rc = 0;
break;
@@ -1543,31 +1562,37 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
case SIOCX25SCUDMATCHLEN: {
struct x25_subaddr sub_addr;
rc = -EINVAL;
+ lock_sock(sk);
if(sk->sk_state != TCP_CLOSE)
- break;
+ goto out_cud_release;
rc = -EFAULT;
if (copy_from_user(&sub_addr, argp,
sizeof(sub_addr)))
- break;
+ goto out_cud_release;
rc = -EINVAL;
if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN)
- break;
+ goto out_cud_release;
x25->cudmatchlength = sub_addr.cudmatchlength;
rc = 0;
+out_cud_release:
+ release_sock(sk);
break;
}
case SIOCX25CALLACCPTAPPRV: {
rc = -EINVAL;
+ lock_kernel();
if (sk->sk_state != TCP_CLOSE)
break;
clear_bit(X25_ACCPT_APPRV_FLAG, &x25->flags);
+ unlock_kernel();
rc = 0;
break;
}
case SIOCX25SENDCALLACCPT: {
rc = -EINVAL;
+ lock_kernel();
if (sk->sk_state != TCP_ESTABLISHED)
break;
/* must call accptapprv above */
@@ -1575,6 +1600,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
break;
x25_write_internal(sk, X25_CALL_ACCEPTED);
x25->state = X25_STATE_3;
+ unlock_kernel();
rc = 0;
break;
}
@@ -1583,7 +1609,6 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
rc = -ENOIOCTLCMD;
break;
}
- unlock_kernel();
return rc;
}
@@ -1619,16 +1644,20 @@ static int compat_x25_subscr_ioctl(unsigned int cmd,
dev_put(dev);
if (cmd == SIOCX25GSUBSCRIP) {
+ read_lock_bh(&x25_neigh_list_lock);
x25_subscr.extended = nb->extended;
x25_subscr.global_facil_mask = nb->global_facil_mask;
+ read_unlock_bh(&x25_neigh_list_lock);
rc = copy_to_user(x25_subscr32, &x25_subscr,
sizeof(*x25_subscr32)) ? -EFAULT : 0;
} else {
rc = -EINVAL;
if (x25_subscr.extended == 0 || x25_subscr.extended == 1) {
rc = 0;
+ write_lock_bh(&x25_neigh_list_lock);
nb->extended = x25_subscr.extended;
nb->global_facil_mask = x25_subscr.global_facil_mask;
+ write_unlock_bh(&x25_neigh_list_lock);
}
}
x25_neigh_put(nb);
@@ -1654,19 +1683,15 @@ static int compat_x25_ioctl(struct socket *sock, unsigned int cmd,
break;
case SIOCGSTAMP:
rc = -EINVAL;
- lock_kernel();
if (sk)
rc = compat_sock_get_timestamp(sk,
(struct timeval __user*)argp);
- unlock_kernel();
break;
case SIOCGSTAMPNS:
rc = -EINVAL;
- lock_kernel();
if (sk)
rc = compat_sock_get_timestampns(sk,
(struct timespec __user*)argp);
- unlock_kernel();
break;
case SIOCGIFADDR:
case SIOCSIFADDR:
@@ -1685,22 +1710,16 @@ static int compat_x25_ioctl(struct socket *sock, unsigned int cmd,
rc = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
- lock_kernel();
rc = x25_route_ioctl(cmd, argp);
- unlock_kernel();
break;
case SIOCX25GSUBSCRIP:
- lock_kernel();
rc = compat_x25_subscr_ioctl(cmd, argp);
- unlock_kernel();
break;
case SIOCX25SSUBSCRIP:
rc = -EPERM;
if (!capable(CAP_NET_ADMIN))
break;
- lock_kernel();
rc = compat_x25_subscr_ioctl(cmd, argp);
- unlock_kernel();
break;
case SIOCX25GFACILITIES:
case SIOCX25SFACILITIES:
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-30 23:20:27 +0000