diff options
Diffstat (limited to 'net/core/ethtool.c')
| -rw-r--r-- | net/core/ethtool.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/core/ethtool.c b/net/core/ethtool.c index 43e9add58340..1a0196fbb49c 100644 --- a/net/core/ethtool.c +++ b/net/core/ethtool.c @@ -1359,13 +1359,16 @@ static int ethtool_get_regs(struct net_device *dev, char __user *useraddr) if (!regbuf) return -ENOMEM; + if (regs.len < reglen) + reglen = regs.len; + ops->get_regs(dev, ®s, regbuf); ret = -EFAULT; if (copy_to_user(useraddr, ®s, sizeof(regs))) goto out; useraddr += offsetof(struct ethtool_regs, data); - if (regbuf && copy_to_user(useraddr, regbuf, regs.len)) + if (copy_to_user(useraddr, regbuf, reglen)) goto out; ret = 0; |