From dc13c8761c91c06acd3d98cd107f371cba9811b9 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 18 May 2020 08:28:08 +0200 Subject: ipv4,appletalk: move SIOCADDRT and SIOCDELRT handling into ->compat_ioctl 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 Signed-off-by: David S. Miller --- net/appletalk/ddp.c | 49 ++++++++++++++++++++++++++++++++++++++++++++----- 1 file changed, 44 insertions(+), 5 deletions(-) (limited to 'net/appletalk') diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c index 4177a74f6543..15787e8c0629 100644 --- a/net/appletalk/ddp.c +++ b/net/appletalk/ddp.c @@ -57,6 +57,7 @@ #include #include #include +#include #include #include @@ -1839,20 +1840,58 @@ static int atalk_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) #ifdef CONFIG_COMPAT +static int atalk_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; + + switch (cmd) { + case SIOCDELRT: + if (rt.rt_dst.sa_family != AF_APPLETALK) + return -EINVAL; + return atrtr_delete(&((struct sockaddr_at *) + &rt.rt_dst)->sat_addr); + + case SIOCADDRT: + rt.rt_dev = compat_ptr(rtdev); + return atrtr_ioctl_addrt(&rt); + default: + return -EINVAL; + } +} static int atalk_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) { + void __user *argp = compat_ptr(arg); + struct sock *sk = sock->sk; + + switch (cmd) { + case SIOCADDRT: + case SIOCDELRT: + return atalk_compat_routing_ioctl(sk, cmd, argp); /* * SIOCATALKDIFADDR is a SIOCPROTOPRIVATE ioctl number, so we * cannot handle it in common code. The data we access if ifreq * here is compatible, so we can simply call the native * handler. */ - if (cmd == SIOCATALKDIFADDR) - return atalk_ioctl(sock, cmd, (unsigned long)compat_ptr(arg)); - - return -ENOIOCTLCMD; + case SIOCATALKDIFADDR: + return atalk_ioctl(sock, cmd, (unsigned long)argp); + default: + return -ENOIOCTLCMD; + } } -#endif +#endif /* CONFIG_COMPAT */ static const struct net_proto_family atalk_family_ops = { -- cgit v1.2.3