Commit 894cfbc0 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by David S. Miller
Browse files

net/ipv6: switch do_ipv6_setsockopt to sockptr_t 



Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b84d2b73

net/ipv6/ipv6_sockglue.c

+33 −33
Original line number Diff line number Diff line
@@ -136,15 +136,15 @@ static bool setsockopt_needs_rtnl(int optname) 
	return false;

}



static int copy_group_source_from_user(struct group_source_req *greqs,

		void __user *optval, int optlen)

static int copy_group_source_from_sockptr(struct group_source_req *greqs,

		sockptr_t optval, int optlen)

{

	if (in_compat_syscall()) {

		struct compat_group_source_req gr32;



		if (optlen < sizeof(gr32))

			return -EINVAL;

		if (copy_from_user(&gr32, optval, sizeof(gr32)))

		if (copy_from_sockptr(&gr32, optval, sizeof(gr32)))

			return -EFAULT;

		greqs->gsr_interface = gr32.gsr_interface;

		greqs->gsr_group = gr32.gsr_group;
@@ -152,7 +152,7 @@ static int copy_group_source_from_user(struct group_source_req *greqs, 
	} else {

		if (optlen < sizeof(*greqs))

			return -EINVAL;

		if (copy_from_user(greqs, optval, sizeof(*greqs)))

		if (copy_from_sockptr(greqs, optval, sizeof(*greqs)))

			return -EFAULT;

	}
@@ -160,13 +160,13 @@ static int copy_group_source_from_user(struct group_source_req *greqs, 
}



static int do_ipv6_mcast_group_source(struct sock *sk, int optname,

		void __user *optval, int optlen)

		sockptr_t optval, int optlen)

{

	struct group_source_req greqs;

	int omode, add;

	int ret;



	ret = copy_group_source_from_user(&greqs, optval, optlen);

	ret = copy_group_source_from_sockptr(&greqs, optval, optlen);

	if (ret)

		return ret;
@@ -200,7 +200,7 @@ static int do_ipv6_mcast_group_source(struct sock *sk, int optname, 
	return ip6_mc_source(add, omode, sk, &greqs);

}



static int ipv6_set_mcast_msfilter(struct sock *sk, void __user *optval,

static int ipv6_set_mcast_msfilter(struct sock *sk, sockptr_t optval,

		int optlen)

{

	struct group_filter *gsf;
@@ -211,7 +211,7 @@ static int ipv6_set_mcast_msfilter(struct sock *sk, void __user *optval, 
	if (optlen > sysctl_optmem_max)

		return -ENOBUFS;



	gsf = memdup_user(optval, optlen);

	gsf = memdup_sockptr(optval, optlen);

	if (IS_ERR(gsf))

		return PTR_ERR(gsf);
@@ -231,7 +231,7 @@ out_free_gsf: 
	return ret;

}



static int compat_ipv6_set_mcast_msfilter(struct sock *sk, void __user *optval,

static int compat_ipv6_set_mcast_msfilter(struct sock *sk, sockptr_t optval,

		int optlen)

{

	const int size0 = offsetof(struct compat_group_filter, gf_slist);
@@ -251,7 +251,7 @@ static int compat_ipv6_set_mcast_msfilter(struct sock *sk, void __user *optval, 


	gf32 = p + 4; /* we want ->gf_group and ->gf_slist aligned */

	ret = -EFAULT;

	if (copy_from_user(gf32, optval, optlen))

	if (copy_from_sockptr(gf32, optval, optlen))

		goto out_free_p;



	/* numsrc >= (4G-140)/128 overflow in 32 bits */
@@ -276,14 +276,14 @@ out_free_p: 
}



static int ipv6_mcast_join_leave(struct sock *sk, int optname,

		void __user *optval, int optlen)

		sockptr_t optval, int optlen)

{

	struct sockaddr_in6 *psin6;

	struct group_req greq;



	if (optlen < sizeof(greq))

		return -EINVAL;

	if (copy_from_user(&greq, optval, sizeof(greq)))

	if (copy_from_sockptr(&greq, optval, sizeof(greq)))

		return -EFAULT;



	if (greq.gr_group.ss_family != AF_INET6)
@@ -296,14 +296,14 @@ static int ipv6_mcast_join_leave(struct sock *sk, int optname, 
}



static int compat_ipv6_mcast_join_leave(struct sock *sk, int optname,

		void __user *optval, int optlen)

		sockptr_t optval, int optlen)

{

	struct compat_group_req gr32;

	struct sockaddr_in6 *psin6;



	if (optlen < sizeof(gr32))

		return -EINVAL;

	if (copy_from_user(&gr32, optval, sizeof(gr32)))

	if (copy_from_sockptr(&gr32, optval, sizeof(gr32)))

		return -EFAULT;



	if (gr32.gr_group.ss_family != AF_INET6)
@@ -315,7 +315,7 @@ static int compat_ipv6_mcast_join_leave(struct sock *sk, int optname, 
	return ipv6_sock_mc_drop(sk, gr32.gr_interface, &psin6->sin6_addr);

}



static int ipv6_set_opt_hdr(struct sock *sk, int optname, void __user *optval,

static int ipv6_set_opt_hdr(struct sock *sk, int optname, sockptr_t optval,

		int optlen)

{

	struct ipv6_pinfo *np = inet6_sk(sk);
@@ -332,14 +332,14 @@ static int ipv6_set_opt_hdr(struct sock *sk, int optname, void __user *optval, 
	 * length, per RFC3542.

	 */

	if (optlen > 0) {

		if (!optval)

		if (sockptr_is_null(optval))

			return -EINVAL;

		if (optlen < sizeof(struct ipv6_opt_hdr) ||

		    optlen & 0x7 ||

		    optlen > 8 * 255)

			return -EINVAL;



		new = memdup_user(optval, optlen);

		new = memdup_sockptr(optval, optlen);

		if (IS_ERR(new))

			return PTR_ERR(new);

		if (unlikely(ipv6_optlen(new) > optlen)) {
@@ -390,7 +390,7 @@ sticky_done: 
}



static int do_ipv6_setsockopt(struct sock *sk, int level, int optname,

		    char __user *optval, unsigned int optlen)

		   sockptr_t optval, unsigned int optlen)

{

	struct ipv6_pinfo *np = inet6_sk(sk);

	struct net *net = sock_net(sk);
@@ -398,11 +398,11 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 
	int retv = -ENOPROTOOPT;

	bool needs_rtnl = setsockopt_needs_rtnl(optname);



	if (!optval)

	if (sockptr_is_null(optval))

		val = 0;

	else {

		if (optlen >= sizeof(int)) {

			if (get_user(val, (int __user *) optval))

			if (copy_from_sockptr(&val, optval, sizeof(val)))

				return -EFAULT;

		} else

			val = 0;
@@ -411,8 +411,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 
	valbool = (val != 0);



	if (ip6_mroute_opt(optname))

		return ip6_mroute_setsockopt(sk, optname, USER_SOCKPTR(optval),

					     optlen);

		return ip6_mroute_setsockopt(sk, optname, optval, optlen);



	if (needs_rtnl)

		rtnl_lock();
@@ -663,10 +662,11 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 


		if (optlen == 0)

			goto e_inval;

		else if (optlen < sizeof(struct in6_pktinfo) || !optval)

		else if (optlen < sizeof(struct in6_pktinfo) ||

			 sockptr_is_null(optval))

			goto e_inval;



		if (copy_from_user(&pkt, optval, sizeof(struct in6_pktinfo))) {

		if (copy_from_sockptr(&pkt, optval, sizeof(pkt))) {

			retv = -EFAULT;

			break;

		}
@@ -709,7 +709,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, 
		refcount_set(&opt->refcnt, 1);

		opt->tot_len = sizeof(*opt) + optlen;

		retv = -EFAULT;

		if (copy_from_user(opt+1, optval, optlen))

		if (copy_from_sockptr(opt + 1, optval, optlen))

			goto done;



		msg.msg_controllen = optlen;
@@ -831,7 +831,7 @@ done: 
			break;



		retv = -EFAULT;

		if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))

		if (copy_from_sockptr(&mreq, optval, sizeof(struct ipv6_mreq)))

			break;



		if (optname == IPV6_ADD_MEMBERSHIP)
@@ -849,7 +849,7 @@ done: 
			goto e_inval;



		retv = -EFAULT;

		if (copy_from_user(&mreq, optval, sizeof(struct ipv6_mreq)))

		if (copy_from_sockptr(&mreq, optval, sizeof(struct ipv6_mreq)))

			break;



		if (optname == IPV6_JOIN_ANYCAST)
@@ -929,15 +929,14 @@ done: 
		retv = 0;

		break;

	case IPV6_FLOWLABEL_MGR:

		retv = ipv6_flowlabel_opt(sk, USER_SOCKPTR(optval), optlen);

		retv = ipv6_flowlabel_opt(sk, optval, optlen);

		break;

	case IPV6_IPSEC_POLICY:

	case IPV6_XFRM_POLICY:

		retv = -EPERM;

		if (!ns_capable(net->user_ns, CAP_NET_ADMIN))

			break;

		retv = xfrm_user_policy(sk, optname, USER_SOCKPTR(optval),

					optlen);

		retv = xfrm_user_policy(sk, optname, optval, optlen);

		break;



	case IPV6_ADDR_PREFERENCES:
@@ -992,7 +991,8 @@ int ipv6_setsockopt(struct sock *sk, int level, int optname, 
	if (level != SOL_IPV6)

		return -ENOPROTOOPT;



	err = do_ipv6_setsockopt(sk, level, optname, optval, optlen);

	err = do_ipv6_setsockopt(sk, level, optname, USER_SOCKPTR(optval),

				 optlen);

#ifdef CONFIG_NETFILTER

	/* we need to exclude all possible ENOPROTOOPTs except default case */

	if (err == -ENOPROTOOPT && optname != IPV6_IPSEC_POLICY &&

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