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Commit 11f6dff8 authored by Patrick McHardy's avatar Patrick McHardy Committed by David S. Miller
Browse files

[NETFILTER]: arp_tables: resync get_entries() with ip_tables 



Resync get_entries() with ip_tables.c by moving the checks from the
setsockopt handler to the function itself.

Signed-off-by: default avatarPatrick McHardy <kaber@trash.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 41acd975

net/ipv4/netfilter/arp_tables.c

+19 −20
Original line number Diff line number Diff line
@@ -825,23 +825,35 @@ static int get_info(void __user *user, int *len) 
	return ret;

}



static int get_entries(const struct arpt_get_entries *entries,

		       struct arpt_get_entries __user *uptr)

static int get_entries(struct arpt_get_entries __user *uptr, int *len)

{

	int ret;

	struct arpt_get_entries get;

	struct arpt_table *t;



	t = xt_find_table_lock(NF_ARP, entries->name);

	if (*len < sizeof(get)) {

		duprintf("get_entries: %u < %Zu\n", *len, sizeof(get));

		return -EINVAL;

	}

	if (copy_from_user(&get, uptr, sizeof(get)) != 0)

		return -EFAULT;

	if (*len != sizeof(struct arpt_get_entries) + get.size) {

		duprintf("get_entries: %u != %Zu\n", *len,

			 sizeof(struct arpt_get_entries) + get.size);

		return -EINVAL;

	}



	t = xt_find_table_lock(NF_ARP, get.name);

	if (t && !IS_ERR(t)) {

		struct xt_table_info *private = t->private;

		duprintf("t->private->number = %u\n",

			 private->number);

		if (entries->size == private->size)

		if (get.size == private->size)

			ret = copy_entries_to_user(private->size,

						   t, uptr->entrytable);

		else {

			duprintf("get_entries: I've got %u not %u!\n",

				 private->size, entries->size);

				 private->size, get.size);

			ret = -EINVAL;

		}

		module_put(t->me);
@@ -1055,22 +1067,9 @@ static int do_arpt_get_ctl(struct sock *sk, int cmd, void __user *user, int *len 
		ret = get_info(user, len);

		break;



	case ARPT_SO_GET_ENTRIES: {

		struct arpt_get_entries get;



		if (*len < sizeof(get)) {

			duprintf("get_entries: %u < %Zu\n", *len, sizeof(get));

			ret = -EINVAL;

		} else if (copy_from_user(&get, user, sizeof(get)) != 0) {

			ret = -EFAULT;

		} else if (*len != sizeof(struct arpt_get_entries) + get.size) {

			duprintf("get_entries: %u != %Zu\n", *len,

				 sizeof(struct arpt_get_entries) + get.size);

			ret = -EINVAL;

		} else

			ret = get_entries(&get, user);

	case ARPT_SO_GET_ENTRIES:

		ret = get_entries(user, len);

		break;

	}



	case ARPT_SO_GET_REVISION_TARGET: {

		struct xt_get_revision rev;