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| author | Zhang Shengju <zhangshengju@cmss.chinamobile.com> | 2017-09-20 08:12:23 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-09-20 13:46:45 -0700 |
| commit | 07850a4f74ea0433fe26dccb1ab9556c738a6584 (patch) | |
| tree | 2b9074c71bf60184418d05ce69e89b1ae24d1b05 | |
| parent | d4e1b299ec2853dd3d90b71ae86fa2626e60dc25 (diff) | |
| download | linux-0-day-07850a4f74ea0433fe26dccb1ab9556c738a6584.tar.gz linux-0-day-07850a4f74ea0433fe26dccb1ab9556c738a6584.tar.xz | |
macvlan: code refine to check data before using
This patch checks data first at one place, return if it's null.
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/macvlan.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/net/macvlan.c b/drivers/net/macvlan.c index d2aea961e0f41..1ffe77e95d46c 100644 --- a/drivers/net/macvlan.c +++ b/drivers/net/macvlan.c @@ -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; |