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atm: [he] limit queries to the device's register space

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From: "Robert T. Johnson" <rtjohnso@eecs.berkeley.edu>
Signed-off-by: Chas Williams <chas@cmf.nrl.navy.mil>
This commit is contained in:
Robert T. Johnson
2008-06-16 17:20:52 -07:00
committed by David S. Miller
parent 7e903c2ae3
commit 28e84ab3ab
1 changed files with 6 additions and 1 deletions
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7
drivers/atm/he.c
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@@ -2845,10 +2845,15 @@ he_ioctl(struct atm_dev *atm_dev, unsigned int cmd, void __user *arg)
if (copy_from_user(&reg, arg, if (copy_from_user(&reg, arg,
sizeof(struct he_ioctl_reg))) sizeof(struct he_ioctl_reg)))
return -EFAULT; return -EFAULT;
spin_lock_irqsave(&he_dev->global_lock, flags); spin_lock_irqsave(&he_dev->global_lock, flags);
switch (reg.type) { switch (reg.type) {
case HE_REGTYPE_PCI: case HE_REGTYPE_PCI:
if (reg.addr < 0 || reg.addr >= HE_REGMAP_SIZE) {
err = -EINVAL;
break;
}
reg.val = he_readl(he_dev, reg.addr); reg.val = he_readl(he_dev, reg.addr);
break; break;
case HE_REGTYPE_RCM: case HE_REGTYPE_RCM: