xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ipv4,appletalk: move SIOCADDRT and SIOCDELRT handling into ->compat_ioctl

Browse Source 
To prepare removing the global routing_ioctl hack start lifting the code
into the ipv4 and appletalk ->compat_ioctl handlers.  Unlike the existing
handler we don't bother copying in the name - there are no compat issues for
char arrays.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig
2020-05-18 08:28:08 +02:00
committed by David S. Miller
parent a500492354
commit dc13c8761c
4 changed files with 94 additions and 73 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
net/ipv4/af_inet.c
View File

@@ -116,6 +116,7 @@
#include <linux/mroute.h>
#endif
#include <net/l3mdev.h>
#include <net/compat.h>
#include <trace/events/sock.h>
@@ -970,17 +971,42 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
EXPORT_SYMBOL(inet_ioctl);
#ifdef CONFIG_COMPAT
static int inet_compat_routing_ioctl(struct sock *sk, unsigned int cmd,
struct compat_rtentry __user *ur)
{
compat_uptr_t rtdev;
struct rtentry rt;
if (copy_from_user(&rt.rt_dst, &ur->rt_dst,
3 * sizeof(struct sockaddr)) ||
get_user(rt.rt_flags, &ur->rt_flags) ||
get_user(rt.rt_metric, &ur->rt_metric) ||
get_user(rt.rt_mtu, &ur->rt_mtu) ||
get_user(rt.rt_window, &ur->rt_window) ||
get_user(rt.rt_irtt, &ur->rt_irtt) ||
get_user(rtdev, &ur->rt_dev))
return -EFAULT;
rt.rt_dev = compat_ptr(rtdev);
return ip_rt_ioctl(sock_net(sk), cmd, &rt);
}
static int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
void __user *argp = compat_ptr(arg);
struct sock *sk = sock->sk;
int err = -ENOIOCTLCMD;
if (sk->sk_prot->compat_ioctl)
err = sk->sk_prot->compat_ioctl(sk, cmd, arg);
return err;
switch (cmd) {
case SIOCADDRT:
case SIOCDELRT:
return inet_compat_routing_ioctl(sk, cmd, argp);
default:
if (!sk->sk_prot->compat_ioctl)
return -ENOIOCTLCMD;
return sk->sk_prot->compat_ioctl(sk, cmd, arg);
}
}
#endif
#endif /* CONFIG_COMPAT */
const struct proto_ops inet_stream_ops = {
.family = PF_INET,