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Commit 07850a4f authored by Zhang Shengju's avatar Zhang Shengju Committed by David S. Miller
Browse files

macvlan: code refine to check data before using 



This patch checks data first at one place, return if it's null.

Signed-off-by: default avatarZhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent d4e1b299

drivers/net/macvlan.c

+8 −5
Original line number Diff line number Diff line
@@ -1231,11 +1231,14 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], 
			return -EADDRNOTAVAIL;

	}



	if (data && data[IFLA_MACVLAN_FLAGS] &&

	if (!data)

		return 0;



	if (data[IFLA_MACVLAN_FLAGS] &&

	    nla_get_u16(data[IFLA_MACVLAN_FLAGS]) & ~MACVLAN_FLAG_NOPROMISC)

		return -EINVAL;



	if (data && data[IFLA_MACVLAN_MODE]) {

	if (data[IFLA_MACVLAN_MODE]) {

		switch (nla_get_u32(data[IFLA_MACVLAN_MODE])) {

		case MACVLAN_MODE_PRIVATE:

		case MACVLAN_MODE_VEPA:
@@ -1248,7 +1251,7 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], 
		}

	}



	if (data && data[IFLA_MACVLAN_MACADDR_MODE]) {

	if (data[IFLA_MACVLAN_MACADDR_MODE]) {

		switch (nla_get_u32(data[IFLA_MACVLAN_MACADDR_MODE])) {

		case MACVLAN_MACADDR_ADD:

		case MACVLAN_MACADDR_DEL:
@@ -1260,7 +1263,7 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], 
		}

	}



	if (data && data[IFLA_MACVLAN_MACADDR]) {

	if (data[IFLA_MACVLAN_MACADDR]) {

		if (nla_len(data[IFLA_MACVLAN_MACADDR]) != ETH_ALEN)

			return -EINVAL;
@@ -1268,7 +1271,7 @@ static int macvlan_validate(struct nlattr *tb[], struct nlattr *data[], 
			return -EADDRNOTAVAIL;

	}



	if (data && data[IFLA_MACVLAN_MACADDR_COUNT])

	if (data[IFLA_MACVLAN_MACADDR_COUNT])

		return -EINVAL;



	return 0;