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authorArnd Bergmann2021-07-27 15:45:01 +0200
committerDavid S. Miller2021-07-27 20:11:44 +0100
commit76b5878cffab379dd4fd84c04bdf20d21177729d (patch)
treebbccab3b97d1853fe101be1b3df14790a381eebe
parentef1b5b0c30bc61587a9da19cc0ab078bba53ebcc (diff)
slip/plip: use ndo_siocdevprivate
slip and plip both use a couple of SIOCDEVPRIVATE ioctl commands that overload the ifreq layout in a way that is incompatible with compat mode. Convert to use ndo_siocdevprivate to allow passing the data this way, but return an error in compat mode anyway because the private structure is still incompatible. This could be fixed as well to make compat work properly. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--drivers/net/plip/plip.c12
-rw-r--r--drivers/net/slip/slip.c13
2 files changed, 18 insertions, 7 deletions
diff --git a/drivers/net/plip/plip.c b/drivers/net/plip/plip.c
index e26cf91bdec2..82d609401711 100644
--- a/drivers/net/plip/plip.c
+++ b/drivers/net/plip/plip.c
@@ -84,6 +84,7 @@ static const char version[] = "NET3 PLIP version 2.4-parport gniibe@mri.co.jp\n"
extra grounds are 18,19,20,21,22,23,24
*/
+#include <linux/compat.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
@@ -150,7 +151,8 @@ static int plip_hard_header_cache(const struct neighbour *neigh,
struct hh_cache *hh, __be16 type);
static int plip_open(struct net_device *dev);
static int plip_close(struct net_device *dev);
-static int plip_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
+static int plip_siocdevprivate(struct net_device *dev, struct ifreq *ifr,
+ void __user *data, int cmd);
static int plip_preempt(void *handle);
static void plip_wakeup(void *handle);
@@ -265,7 +267,7 @@ static const struct net_device_ops plip_netdev_ops = {
.ndo_open = plip_open,
.ndo_stop = plip_close,
.ndo_start_xmit = plip_tx_packet,
- .ndo_do_ioctl = plip_ioctl,
+ .ndo_siocdevprivate = plip_siocdevprivate,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
};
@@ -1207,7 +1209,8 @@ plip_wakeup(void *handle)
}
static int
-plip_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+plip_siocdevprivate(struct net_device *dev, struct ifreq *rq,
+ void __user *data, int cmd)
{
struct net_local *nl = netdev_priv(dev);
struct plipconf *pc = (struct plipconf *) &rq->ifr_ifru;
@@ -1215,6 +1218,9 @@ plip_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
if (cmd != SIOCDEVPLIP)
return -EOPNOTSUPP;
+ if (in_compat_syscall())
+ return -EOPNOTSUPP;
+
switch(pc->pcmd) {
case PLIP_GET_TIMEOUT:
pc->trigger = nl->trigger;
diff --git a/drivers/net/slip/slip.c b/drivers/net/slip/slip.c
index dc84cb844319..5435b5689ce6 100644
--- a/drivers/net/slip/slip.c
+++ b/drivers/net/slip/slip.c
@@ -62,6 +62,7 @@
*/
#define SL_CHECK_TRANSMIT
+#include <linux/compat.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
@@ -108,7 +109,7 @@ static void slip_unesc6(struct slip *sl, unsigned char c);
#ifdef CONFIG_SLIP_SMART
static void sl_keepalive(struct timer_list *t);
static void sl_outfill(struct timer_list *t);
-static int sl_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
+static int sl_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd);
#endif
/********************************
@@ -647,7 +648,7 @@ static const struct net_device_ops sl_netdev_ops = {
.ndo_change_mtu = sl_change_mtu,
.ndo_tx_timeout = sl_tx_timeout,
#ifdef CONFIG_SLIP_SMART
- .ndo_do_ioctl = sl_ioctl,
+ .ndo_siocdevprivate = sl_siocdevprivate,
#endif
};
@@ -1179,11 +1180,12 @@ static int slip_ioctl(struct tty_struct *tty, struct file *file,
/* VSV changes start here */
#ifdef CONFIG_SLIP_SMART
-/* function do_ioctl called from net/core/dev.c
+/* function sl_siocdevprivate called from net/core/dev.c
to allow get/set outfill/keepalive parameter
by ifconfig */
-static int sl_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+static int sl_siocdevprivate(struct net_device *dev, struct ifreq *rq,
+ void __user *data, int cmd)
{
struct slip *sl = netdev_priv(dev);
unsigned long *p = (unsigned long *)&rq->ifr_ifru;
@@ -1191,6 +1193,9 @@ static int sl_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
if (sl == NULL) /* Allocation failed ?? */
return -ENODEV;
+ if (in_compat_syscall())
+ return -EOPNOTSUPP;
+
spin_lock_bh(&sl->lock);
if (!sl->tty) {