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tulip: use ndo_siocdevprivate

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The tulip driver has a debugging method over ioctl built-in, but it
does not actually check the command type, which may end up leading
to random behavior when trying to run other ioctls on it.

Change the driver to use ndo_siocdevprivate and limit the execution
further to the first private command code. If anyone still has tools
to run these debugging commands, they might have to be patched for
it if they pass different ioctl command.

The function has existed in this form since the driver was merged in
Linux-1.1.86.

Cc: linux-parisc@vger.kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2021-07-27 15:44:53 +02:00 committed by David S. Miller
parent 4747c1a8bc
commit 029a4fef6b
1 changed files with 8 additions and 3 deletions
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11
drivers/net/ethernet/dec/tulip/de4x5.c
View file

@ -443,6 +443,7 @@
=========================================================================
*/
#include <linux/compat.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
@ -902,7 +903,8 @@ static int de4x5_close(struct net_device *dev);
static struct net_device_stats *de4x5_get_stats(struct net_device *dev);
static void de4x5_local_stats(struct net_device *dev, char *buf, int pkt_len);
static void set_multicast_list(struct net_device *dev);
static int de4x5_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
static int de4x5_siocdevprivate(struct net_device *dev, struct ifreq *rq,
void __user *data, int cmd);
/*
** Private functions
@ -1084,7 +1086,7 @@ static const struct net_device_ops de4x5_netdev_ops = {
.ndo_start_xmit = de4x5_queue_pkt,
.ndo_get_stats = de4x5_get_stats,
.ndo_set_rx_mode = set_multicast_list,
.ndo_do_ioctl = de4x5_ioctl,
.ndo_siocdevprivate = de4x5_siocdevprivate,
.ndo_set_mac_address= eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
};
@ -5357,7 +5359,7 @@ de4x5_dbg_rx(struct sk_buff *skb, int len)
** this function is only used for my testing.
*/
static int
de4x5_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
de4x5_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd)
{
struct de4x5_private *lp = netdev_priv(dev);
struct de4x5_ioctl *ioc = (struct de4x5_ioctl *) &rq->ifr_ifru;
@ -5371,6 +5373,9 @@ de4x5_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
} tmp;
u_long flags = 0;
if (cmd != SIOCDEVPRIVATE || in_compat_syscall())
return -EOPNOTSUPP;
switch(ioc->cmd) {
case DE4X5_GET_HWADDR: /* Get the hardware address */
ioc->len = ETH_ALEN;