diff options
| author | Arnd Bergmann <arnd@arndb.de> | 2021-07-27 16:44:59 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-07-27 22:11:43 +0300 |
| commit | 043393d8b4786534cd070e0c071a2716313c5558 (patch) | |
| tree | 6efb3dd510aacd6605a21faabece6b03305003fd | |
| parent | d92f7b59d32bfeace7315b416f5244dd5c3935fa (diff) | |
| download | linux-043393d8b4786534cd070e0c071a2716313c5558.tar.xz | |
fddi: use ndo_siocdevprivate
The skfddi driver has a private ioctl and passes the data correctly
through ifr_data, but the use of a pointer in s_skfp_ioctl is
broken in compat mode.
Change the driver to use ndo_siocdevprivate and disallow calling
it in compat mode until a conversion handler is added.
Cc: "Maciej W. Rozycki" <macro@orcam.me.uk>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/fddi/skfp/skfddi.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/drivers/net/fddi/skfp/skfddi.c b/drivers/net/fddi/skfp/skfddi.c index 69c29a2ef95d..f62e98fada1a 100644 --- a/drivers/net/fddi/skfp/skfddi.c +++ b/drivers/net/fddi/skfp/skfddi.c @@ -70,6 +70,7 @@ static const char * const boot_msg = /* Include files */ #include <linux/capability.h> +#include <linux/compat.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/errno.h> @@ -103,7 +104,8 @@ static struct net_device_stats *skfp_ctl_get_stats(struct net_device *dev); static void skfp_ctl_set_multicast_list(struct net_device *dev); static void skfp_ctl_set_multicast_list_wo_lock(struct net_device *dev); static int skfp_ctl_set_mac_address(struct net_device *dev, void *addr); -static int skfp_ioctl(struct net_device *dev, struct ifreq *rq, int cmd); +static int skfp_siocdevprivate(struct net_device *dev, struct ifreq *rq, + void __user *data, int cmd); static netdev_tx_t skfp_send_pkt(struct sk_buff *skb, struct net_device *dev); static void send_queued_packets(struct s_smc *smc); @@ -164,7 +166,7 @@ static const struct net_device_ops skfp_netdev_ops = { .ndo_get_stats = skfp_ctl_get_stats, .ndo_set_rx_mode = skfp_ctl_set_multicast_list, .ndo_set_mac_address = skfp_ctl_set_mac_address, - .ndo_do_ioctl = skfp_ioctl, + .ndo_siocdevprivate = skfp_siocdevprivate, }; /* @@ -932,9 +934,9 @@ static int skfp_ctl_set_mac_address(struct net_device *dev, void *addr) /* - * ============== - * = skfp_ioctl = - * ============== + * ======================= + * = skfp_siocdevprivate = + * ======================= * * Overview: * @@ -954,16 +956,19 @@ static int skfp_ctl_set_mac_address(struct net_device *dev, void *addr) */ -static int skfp_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +static int skfp_siocdevprivate(struct net_device *dev, struct ifreq *rq, void __user *data, int cmd) { struct s_smc *smc = netdev_priv(dev); skfddi_priv *lp = &smc->os; struct s_skfp_ioctl ioc; int status = 0; - if (copy_from_user(&ioc, rq->ifr_data, sizeof(struct s_skfp_ioctl))) + if (copy_from_user(&ioc, data, sizeof(struct s_skfp_ioctl))) return -EFAULT; + if (in_compat_syscall()) + return -EOPNOTSUPP; + switch (ioc.cmd) { case SKFP_GET_STATS: /* Get the driver statistics */ ioc.len = sizeof(lp->MacStat); |