[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-kernel
Subject:    [26/37] tehuti: check register size (CVE-2008-1675)
From:       Greg KH <gregkh () suse ! de>
Date:       2008-04-29 17:18:58
Message-ID: 20080429171858.GA14724 () suse ! de
[Download RAW message or body]

2.6.25-stable review patch.  If anyone has any objections, please let us
know.

------------------
From: Francois Romieu <romieu@fr.zoreil.com>

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>

---
 drivers/net/tehuti.c |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

--- a/drivers/net/tehuti.c
+++ b/drivers/net/tehuti.c
@@ -625,6 +625,12 @@ static void __init bdx_firmware_endianes
 		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_dev
 	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_dev
 		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;

-- 
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/
[prev in list] [next in list] [prev in thread] [next in thread] 

Configure | About | News | Add a list | Sponsored by KoreLogic