tehuti: check register size

Signed-off-by: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 14 insertions, 0 deletions

diff --git a/drivers/net/tehuti.c b/drivers/net/tehuti.c
index 17585e5eed53..d2e1b219673d 100644
--- a/drivers/net/tehuti.c
+++ b/drivers/net/tehuti.c
@@ -625,6 +625,12 @@ static void __init bdx_firmware_endianess(void)
                 s_firmLoad[i] = CPU_CHIP_SWAP32(s_firmLoad[i]);
 }
 
+static int bdx_range_check(struct bdx_priv *priv, u32 offset)
+{
+        return (offset > (u32) (BDX_REGS_SIZE / priv->nic->port_num)) ?
+                -EINVAL : 0;
+}
+
 static int bdx_ioctl_priv(struct net_device *ndev, struct ifreq *ifr, int cmd)
 {
         struct bdx_priv *priv = ndev->priv;
@@ -646,6 +652,9 @@ static int bdx_ioctl_priv(struct net_device *ndev, struct ifreq *ifr, int cmd)
         switch (data[0]) {
 
         case BDX_OP_READ:
+                error = bdx_range_check(priv, data[1]);
+                if (error < 0)
+                        return error;
                 data[2] = READ_REG(priv, data[1]);
                 DBG("read_reg(0x%x)=0x%x (dec %d)\n", data[1], data[2],
                     data[2]);
@@ -655,6 +664,11 @@ static int bdx_ioctl_priv(struct net_device *ndev, struct ifreq *ifr, int cmd)
                 break;
 
         case BDX_OP_WRITE:
+                if (!capable(CAP_NET_ADMIN))
+                        return -EPERM;
+                error = bdx_range_check(priv, data[1]);
+                if (error < 0)
+                        return error;
                 WRITE_REG(priv, data[1], data[2]);
                 DBG("write_reg(0x%x, 0x%x)\n", data[1], data[2]);
                 break;