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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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8
net/ipv4/fib_frontend.c
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@@ -587,10 +587,9 @@ static int rtentry_to_fib_config(struct net *net, int cmd, struct rtentry *rt,
* Handle IP routing ioctl calls.
* These are used to manipulate the routing tables
*/
int ip_rt_ioctl(struct net *net, unsigned int cmd, void __user *arg)
int ip_rt_ioctl(struct net *net, unsigned int cmd, struct rtentry *rt)
{
struct fib_config cfg;
struct rtentry rt;
int err;
switch (cmd) {
@@ -599,11 +598,8 @@ int ip_rt_ioctl(struct net *net, unsigned int cmd, void __user *arg)
if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
return -EPERM;
if (copy_from_user(&rt, arg, sizeof(rt)))
return -EFAULT;
rtnl_lock();
err = rtentry_to_fib_config(net, cmd, &rt, &cfg);
err = rtentry_to_fib_config(net, cmd, rt, &cfg);
if (err == 0) {
struct fib_table *tb;