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authorFrancois Romieu <romieu@fr.zoreil.com>2008-04-20 19:32:34 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2008-05-01 14:44:37 -0700
commit492d59860bd9a36deac6c3189ba98af355108324 (patch)
tree35f0475966174771617dfa864394c2ad0338b218
parentbc7f6557b7d084a64236ec7fbe64383e89d94602 (diff)
tehuti: check register size (CVE-2008-1675)
commit 6131a2601f42cd7fdbac0e960713396fe68af59f upstream Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--drivers/net/tehuti.c14
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;