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ip_rt_ioctl(): take copyin to caller

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Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2017-07-01 08:03:10 -04:00
parent 03aef17bb7
commit ca25c30040
4 changed files with 10 additions and 20 deletions
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7
net/ipv4/af_inet.c
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@@ -874,6 +874,7 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
struct net *net = sock_net(sk);
void __user *p = (void __user *)arg;
struct ifreq ifr;
struct rtentry rt;
switch (cmd) {
case SIOCGSTAMP:
@@ -884,8 +885,12 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
break;
case SIOCADDRT:
case SIOCDELRT:
if (copy_from_user(&rt, p, sizeof(struct rtentry)))
return -EFAULT;
err = ip_rt_ioctl(net, cmd, &rt);
break;
case SIOCRTMSG:
err = ip_rt_ioctl(net, cmd, (void __user *)arg);
err = -EINVAL;
break;
case SIOCDARP:
case SIOCGARP: