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Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c178
1 files changed, 6 insertions, 172 deletions
diff --git a/net/socket.c b/net/socket.c
index 2dd739fba866..976426d03f09 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -924,14 +924,9 @@ EXPORT_SYMBOL(sock_recvmsg);
int kernel_recvmsg(struct socket *sock, struct msghdr *msg,
struct kvec *vec, size_t num, size_t size, int flags)
{
- mm_segment_t oldfs = get_fs();
- int result;
-
+ msg->msg_control_is_user = false;
iov_iter_kvec(&msg->msg_iter, READ, vec, num, size);
- set_fs(KERNEL_DS);
- result = sock_recvmsg(sock, msg, flags);
- set_fs(oldfs);
- return result;
+ return sock_recvmsg(sock, msg, flags);
}
EXPORT_SYMBOL(kernel_recvmsg);
@@ -2239,7 +2234,8 @@ int __copy_msghdr_from_user(struct msghdr *kmsg,
if (copy_from_user(&msg, umsg, sizeof(*umsg)))
return -EFAULT;
- kmsg->msg_control = (void __force *)msg.msg_control;
+ kmsg->msg_control_is_user = true;
+ kmsg->msg_control_user = msg.msg_control;
kmsg->msg_controllen = msg.msg_controllen;
kmsg->msg_flags = msg.msg_flags;
@@ -2331,16 +2327,10 @@ static int ____sys_sendmsg(struct socket *sock, struct msghdr *msg_sys,
goto out;
}
err = -EFAULT;
- /*
- * Careful! Before this, msg_sys->msg_control contains a user pointer.
- * Afterwards, it will be a kernel pointer. Thus the compiler-assisted
- * checking falls down on this.
- */
- if (copy_from_user(ctl_buf,
- (void __user __force *)msg_sys->msg_control,
- ctl_len))
+ if (copy_from_user(ctl_buf, msg_sys->msg_control_user, ctl_len))
goto out_freectl;
msg_sys->msg_control = ctl_buf;
+ msg_sys->msg_control_is_user = false;
}
msg_sys->msg_flags = flags;
@@ -3376,94 +3366,6 @@ static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
return err;
}
-struct rtentry32 {
- u32 rt_pad1;
- struct sockaddr rt_dst; /* target address */
- struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */
- struct sockaddr rt_genmask; /* target network mask (IP) */
- unsigned short rt_flags;
- short rt_pad2;
- u32 rt_pad3;
- unsigned char rt_tos;
- unsigned char rt_class;
- short rt_pad4;
- short rt_metric; /* +1 for binary compatibility! */
- /* char * */ u32 rt_dev; /* forcing the device at add */
- u32 rt_mtu; /* per route MTU/Window */
- u32 rt_window; /* Window clamping */
- unsigned short rt_irtt; /* Initial RTT */
-};
-
-struct in6_rtmsg32 {
- struct in6_addr rtmsg_dst;
- struct in6_addr rtmsg_src;
- struct in6_addr rtmsg_gateway;
- u32 rtmsg_type;
- u16 rtmsg_dst_len;
- u16 rtmsg_src_len;
- u32 rtmsg_metric;
- u32 rtmsg_info;
- u32 rtmsg_flags;
- s32 rtmsg_ifindex;
-};
-
-static int routing_ioctl(struct net *net, struct socket *sock,
- unsigned int cmd, void __user *argp)
-{
- int ret;
- void *r = NULL;
- struct in6_rtmsg r6;
- struct rtentry r4;
- char devname[16];
- u32 rtdev;
- mm_segment_t old_fs = get_fs();
-
- if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */
- struct in6_rtmsg32 __user *ur6 = argp;
- ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst),
- 3 * sizeof(struct in6_addr));
- ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type));
- ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len));
- ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len));
- ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric));
- ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info));
- ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags));
- ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex));
-
- r = (void *) &r6;
- } else { /* ipv4 */
- struct rtentry32 __user *ur4 = argp;
- ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst),
- 3 * sizeof(struct sockaddr));
- ret |= get_user(r4.rt_flags, &(ur4->rt_flags));
- ret |= get_user(r4.rt_metric, &(ur4->rt_metric));
- ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu));
- ret |= get_user(r4.rt_window, &(ur4->rt_window));
- ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt));
- ret |= get_user(rtdev, &(ur4->rt_dev));
- if (rtdev) {
- ret |= copy_from_user(devname, compat_ptr(rtdev), 15);
- r4.rt_dev = (char __user __force *)devname;
- devname[15] = 0;
- } else
- r4.rt_dev = NULL;
-
- r = (void *) &r4;
- }
-
- if (ret) {
- ret = -EFAULT;
- goto out;
- }
-
- set_fs(KERNEL_DS);
- ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r);
- set_fs(old_fs);
-
-out:
- return ret;
-}
-
/* Since old style bridge ioctl's endup using SIOCDEVPRIVATE
* for some operations; this forces use of the newer bridge-utils that
* use compatible ioctls
@@ -3502,9 +3404,6 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCGIFMAP:
case SIOCSIFMAP:
return compat_sioc_ifmap(net, cmd, argp);
- case SIOCADDRT:
- case SIOCDELRT:
- return routing_ioctl(net, sock, cmd, argp);
case SIOCGSTAMP_OLD:
case SIOCGSTAMPNS_OLD:
if (!sock->ops->gettstamp)
@@ -3726,71 +3625,6 @@ int kernel_getpeername(struct socket *sock, struct sockaddr *addr)
EXPORT_SYMBOL(kernel_getpeername);
/**
- * kernel_getsockopt - get a socket option (kernel space)
- * @sock: socket
- * @level: API level (SOL_SOCKET, ...)
- * @optname: option tag
- * @optval: option value
- * @optlen: option length
- *
- * Assigns the option length to @optlen.
- * Returns 0 or an error.
- */
-
-int kernel_getsockopt(struct socket *sock, int level, int optname,
- char *optval, int *optlen)
-{
- mm_segment_t oldfs = get_fs();
- char __user *uoptval;
- int __user *uoptlen;
- int err;
-
- uoptval = (char __user __force *) optval;
- uoptlen = (int __user __force *) optlen;
-
- set_fs(KERNEL_DS);
- if (level == SOL_SOCKET)
- err = sock_getsockopt(sock, level, optname, uoptval, uoptlen);
- else
- err = sock->ops->getsockopt(sock, level, optname, uoptval,
- uoptlen);
- set_fs(oldfs);
- return err;
-}
-EXPORT_SYMBOL(kernel_getsockopt);
-
-/**
- * kernel_setsockopt - set a socket option (kernel space)
- * @sock: socket
- * @level: API level (SOL_SOCKET, ...)
- * @optname: option tag
- * @optval: option value
- * @optlen: option length
- *
- * Returns 0 or an error.
- */
-
-int kernel_setsockopt(struct socket *sock, int level, int optname,
- char *optval, unsigned int optlen)
-{
- mm_segment_t oldfs = get_fs();
- char __user *uoptval;
- int err;
-
- uoptval = (char __user __force *) optval;
-
- set_fs(KERNEL_DS);
- if (level == SOL_SOCKET)
- err = sock_setsockopt(sock, level, optname, uoptval, optlen);
- else
- err = sock->ops->setsockopt(sock, level, optname, uoptval,
- optlen);
- set_fs(oldfs);
- return err;
-}
-EXPORT_SYMBOL(kernel_setsockopt);
-
-/**
* kernel_sendpage - send a &page through a socket (kernel space)
* @sock: socket
* @page: page
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-21 20:02:18 +0100