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authorAl Viro <viro@zeniv.linux.org.uk>2017-05-13 18:31:26 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2017-06-30 02:04:10 -0400
commit30e7e3ecf39e578ffab6d5944c79c1d30dee0d3f (patch)
treeb0512d1fbf39e90a795d0f066fe550464353d824 /net/core/ethtool.c
parenta2c841d94209f5775d354b563f4dccd76b876dc0 (diff)
ethtool: don't open-code memdup_user()
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'net/core/ethtool.c')
-rw-r--r--net/core/ethtool.c20
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;
}