Commit ab214d1b authored by Christoph Hellwig's avatar Christoph Hellwig Committed by David S. Miller
Browse files

netfilter: switch xt_copy_counters 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 7e4b9dba

include/linux/netfilter/x_tables.h

+2 −2
Original line number Diff line number Diff line
@@ -301,7 +301,7 @@ int xt_target_to_user(const struct xt_entry_target *t, 
int xt_data_to_user(void __user *dst, const void *src,

		    int usersize, int size, int aligned_size);



void *xt_copy_counters_from_user(const void __user *user, unsigned int len,

void *xt_copy_counters(sockptr_t arg, unsigned int len,

		       struct xt_counters_info *info);

struct xt_counters *xt_counters_alloc(unsigned int counters);

net/ipv4/netfilter/arp_tables.c

+3 −4
Original line number Diff line number Diff line
@@ -996,8 +996,7 @@ static int do_replace(struct net *net, const void __user *user, 
	return ret;

}



static int do_add_counters(struct net *net, const void __user *user,

			   unsigned int len)

static int do_add_counters(struct net *net, sockptr_t arg, unsigned int len)

{

	unsigned int i;

	struct xt_counters_info tmp;
@@ -1008,7 +1007,7 @@ static int do_add_counters(struct net *net, const void __user *user, 
	struct arpt_entry *iter;

	unsigned int addend;



	paddc = xt_copy_counters_from_user(user, len, &tmp);

	paddc = xt_copy_counters(arg, len, &tmp);

	if (IS_ERR(paddc))

		return PTR_ERR(paddc);
@@ -1420,7 +1419,7 @@ static int do_arpt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned 
		break;



	case ARPT_SO_SET_ADD_COUNTERS:

		ret = do_add_counters(sock_net(sk), user, len);

		ret = do_add_counters(sock_net(sk), USER_SOCKPTR(user), len);

		break;



	default:

net/ipv4/netfilter/ip_tables.c

+3 −4
Original line number Diff line number Diff line
@@ -1151,8 +1151,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len) 
}



static int

do_add_counters(struct net *net, const void __user *user,

		unsigned int len)

do_add_counters(struct net *net, sockptr_t arg, unsigned int len)

{

	unsigned int i;

	struct xt_counters_info tmp;
@@ -1163,7 +1162,7 @@ do_add_counters(struct net *net, const void __user *user, 
	struct ipt_entry *iter;

	unsigned int addend;



	paddc = xt_copy_counters_from_user(user, len, &tmp);

	paddc = xt_copy_counters(arg, len, &tmp);

	if (IS_ERR(paddc))

		return PTR_ERR(paddc);
@@ -1629,7 +1628,7 @@ do_ipt_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) 
		break;



	case IPT_SO_SET_ADD_COUNTERS:

		ret = do_add_counters(sock_net(sk), user, len);

		ret = do_add_counters(sock_net(sk), USER_SOCKPTR(user), len);

		break;



	default:

net/ipv6/netfilter/ip6_tables.c

+3 −3
Original line number Diff line number Diff line
@@ -1168,7 +1168,7 @@ do_replace(struct net *net, const void __user *user, unsigned int len) 
}



static int

do_add_counters(struct net *net, const void __user *user, unsigned int len)

do_add_counters(struct net *net, sockptr_t arg, unsigned int len)

{

	unsigned int i;

	struct xt_counters_info tmp;
@@ -1179,7 +1179,7 @@ do_add_counters(struct net *net, const void __user *user, unsigned int len) 
	struct ip6t_entry *iter;

	unsigned int addend;



	paddc = xt_copy_counters_from_user(user, len, &tmp);

	paddc = xt_copy_counters(arg, len, &tmp);

	if (IS_ERR(paddc))

		return PTR_ERR(paddc);

	t = xt_find_table_lock(net, AF_INET6, tmp.name);
@@ -1637,7 +1637,7 @@ do_ip6t_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) 
		break;



	case IP6T_SO_SET_ADD_COUNTERS:

		ret = do_add_counters(sock_net(sk), user, len);

		ret = do_add_counters(sock_net(sk), USER_SOCKPTR(user), len);

		break;



	default:

net/netfilter/x_tables.c

+10 −10
Original line number Diff line number Diff line
@@ -1028,9 +1028,9 @@ int xt_check_target(struct xt_tgchk_param *par, 
EXPORT_SYMBOL_GPL(xt_check_target);



/**

 * xt_copy_counters_from_user - copy counters and metadata from userspace

 * xt_copy_counters - copy counters and metadata from a sockptr_t

 *

 * @user: src pointer to userspace memory

 * @arg: src sockptr

 * @len: alleged size of userspace memory

 * @info: where to store the xt_counters_info metadata

 *
@@ -1047,7 +1047,7 @@ EXPORT_SYMBOL_GPL(xt_check_target); 
 * Return: returns pointer that caller has to test via IS_ERR().

 * If IS_ERR is false, caller has to vfree the pointer.

 */

void *xt_copy_counters_from_user(const void __user *user, unsigned int len,

void *xt_copy_counters(sockptr_t arg, unsigned int len,

		       struct xt_counters_info *info)

{

	void *mem;
@@ -1062,12 +1062,12 @@ void *xt_copy_counters_from_user(const void __user *user, unsigned int len, 
			return ERR_PTR(-EINVAL);



		len -= sizeof(compat_tmp);

		if (copy_from_user(&compat_tmp, user, sizeof(compat_tmp)) != 0)

		if (copy_from_sockptr(&compat_tmp, arg, sizeof(compat_tmp)) != 0)

			return ERR_PTR(-EFAULT);



		memcpy(info->name, compat_tmp.name, sizeof(info->name) - 1);

		info->num_counters = compat_tmp.num_counters;

		user += sizeof(compat_tmp);

		sockptr_advance(arg, sizeof(compat_tmp));

	} else

#endif

	{
@@ -1075,10 +1075,10 @@ void *xt_copy_counters_from_user(const void __user *user, unsigned int len, 
			return ERR_PTR(-EINVAL);



		len -= sizeof(*info);

		if (copy_from_user(info, user, sizeof(*info)) != 0)

		if (copy_from_sockptr(info, arg, sizeof(*info)) != 0)

			return ERR_PTR(-EFAULT);



		user += sizeof(*info);

		sockptr_advance(arg, sizeof(*info));

	}

	info->name[sizeof(info->name) - 1] = '\0';
@@ -1092,13 +1092,13 @@ void *xt_copy_counters_from_user(const void __user *user, unsigned int len, 
	if (!mem)

		return ERR_PTR(-ENOMEM);



	if (copy_from_user(mem, user, len) == 0)

	if (copy_from_sockptr(mem, arg, len) == 0)

		return mem;



	vfree(mem);

	return ERR_PTR(-EFAULT);

}

EXPORT_SYMBOL_GPL(xt_copy_counters_from_user);

EXPORT_SYMBOL_GPL(xt_copy_counters);



#ifdef CONFIG_COMPAT

int xt_compat_target_offset(const struct xt_target *target)

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