diff options
| -rw-r--r-- | net/core/ethtool.c | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 03111a2d6653..674b6c9cec18 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -2322,16 +2322,12 @@ static int ethtool_set_tunable(struct net_device *dev, void __user *useraddr) ret = ethtool_tunable_valid(&tuna); if (ret) return ret; - data = kmalloc(tuna.len, GFP_USER); - if (!data) - return -ENOMEM; useraddr += sizeof(tuna); - ret = -EFAULT; - if (copy_from_user(data, useraddr, tuna.len)) - goto out; + data = memdup_user(useraddr, tuna.len); + if (IS_ERR(data)) + return PTR_ERR(data); ret = ops->set_tunable(dev, &tuna, data); -out: kfree(data); return ret; } @@ -2507,18 +2503,14 @@ static int set_phy_tunable(struct net_device *dev, void __user *useraddr) ret = ethtool_phy_tunable_valid(&tuna); if (ret) return ret; - data = kmalloc(tuna.len, GFP_USER); - if (!data) - return -ENOMEM; useraddr += sizeof(tuna); - ret = -EFAULT; - if (copy_from_user(data, useraddr, tuna.len)) - goto out; + data = memdup_user(useraddr, tuna.len); + if (IS_ERR(data)) + return PTR_ERR(data); mutex_lock(&phydev->lock); ret = phydev->drv->set_tunable(phydev, &tuna, data); mutex_unlock(&phydev->lock); -out: kfree(data); return ret; } |