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authorStefan Schmidt <stefan@osg.samsung.com>2015-08-20 12:09:47 +0200
committerMarcel Holtmann <marcel@holtmann.org>2015-08-28 21:00:37 +0200
commit4e1795de10903ae561872c54a72fa1bcf78f49cd (patch)
tree079a1a8ccd4fa1aae16d18c14d5e40d0b1d31f23 /net
parentdf945360ce07ca592464e44fdd2ce61ee1536e1e (diff)
nl802154: stricter input checking for boolean inputs
So far we handled boolean input by forcing them with !! and assigning them into a bool. This allowed userspace to send values > 1 which were used as 1. We should be stricter here and return -EINVAL for all but 0 or 1. Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com> Acked-by: Alexander Aring <alex.aring@gmail.com> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
-rw-r--r--net/ieee802154/nl802154.c16
1 files changed, 12 insertions, 4 deletions
diff --git a/net/ieee802154/nl802154.c b/net/ieee802154/nl802154.c
index 1b00a14850cb..3f89c0abdab1 100644
--- a/net/ieee802154/nl802154.c
+++ b/net/ieee802154/nl802154.c
@@ -1034,7 +1034,7 @@ static int nl802154_set_lbt_mode(struct sk_buff *skb, struct genl_info *info)
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
- bool mode;
+ int mode;
if (netif_running(dev))
return -EBUSY;
@@ -1042,7 +1042,11 @@ static int nl802154_set_lbt_mode(struct sk_buff *skb, struct genl_info *info)
if (!info->attrs[NL802154_ATTR_LBT_MODE])
return -EINVAL;
- mode = !!nla_get_u8(info->attrs[NL802154_ATTR_LBT_MODE]);
+ mode = nla_get_u8(info->attrs[NL802154_ATTR_LBT_MODE]);
+
+ if (mode != 0 && mode != 1)
+ return -EINVAL;
+
if (!wpan_phy_supported_bool(mode, rdev->wpan_phy.supported.lbt))
return -EINVAL;
@@ -1055,7 +1059,7 @@ nl802154_set_ackreq_default(struct sk_buff *skb, struct genl_info *info)
struct cfg802154_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wpan_dev *wpan_dev = dev->ieee802154_ptr;
- bool ackreq;
+ int ackreq;
if (netif_running(dev))
return -EBUSY;
@@ -1063,7 +1067,11 @@ nl802154_set_ackreq_default(struct sk_buff *skb, struct genl_info *info)
if (!info->attrs[NL802154_ATTR_ACKREQ_DEFAULT])
return -EINVAL;
- ackreq = !!nla_get_u8(info->attrs[NL802154_ATTR_ACKREQ_DEFAULT]);
+ ackreq = nla_get_u8(info->attrs[NL802154_ATTR_ACKREQ_DEFAULT]);
+
+ if (ackreq != 0 && ackreq != 1)
+ return -EINVAL;
+
return rdev_set_ackreq_default(rdev, wpan_dev, ackreq);
}