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From: Arnd Bergmann <arnd@kernel.org>
To: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, Jakub Kicinski <kuba@kernel.org>,
	"David S. Miller" <davem@davemloft.net>,
	Arnd Bergmann <arnd@arndb.de>,
	"Maciej W. Rozycki" <macro@orcam.me.uk>
Subject: [PATCH net-next v3 13/31] fddi: use ndo_siocdevprivate
Date: Tue, 27 Jul 2021 15:44:59 +0200	[thread overview]
Message-ID: <20210727134517.1384504-14-arnd@kernel.org> (raw)
In-Reply-To: <20210727134517.1384504-1-arnd@kernel.org>

From: Arnd Bergmann <arnd@arndb.de>

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>
---
 drivers/net/fddi/skfp/skfddi.c | 19 ++++++++++++-------
 1 file 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);
-- 
2.29.2


  parent reply	other threads:[~2021-07-27 13:47 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-27 13:44 [PATCH net-next v3 00/31] ndo_ioctl rework Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 01/31] net: split out SIOCDEVPRIVATE handling from dev_ioctl Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 02/31] staging: rtlwifi: use siocdevprivate Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 03/31] staging: wlan-ng: " Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 04/31] hostap: use ndo_siocdevprivate Arnd Bergmann
2021-07-28  7:07   ` Kalle Valo
2021-07-27 13:44 ` [PATCH net-next v3 05/31] bridge: " Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 06/31] phonet: use siocdevprivate Arnd Bergmann
2021-07-27 16:03   ` Rémi Denis-Courmont
2021-07-27 13:44 ` [PATCH net-next v3 07/31] tulip: use ndo_siocdevprivate Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 08/31] bonding: use siocdevprivate Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 09/31] appletalk: use ndo_siocdevprivate Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 10/31] hamachi: " Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 11/31] tehuti: " Arnd Bergmann
2021-07-27 13:44 ` [PATCH net-next v3 12/31] eql: " Arnd Bergmann
2021-07-27 13:44 ` Arnd Bergmann [this message]
2021-07-27 13:45 ` [PATCH net-next v3 14/31] net: usb: " Arnd Bergmann
2021-07-28 13:02   ` Petko Manolov
2021-07-27 13:45 ` [PATCH net-next v3 15/31] slip/plip: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 16/31] qeth: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 17/31] cxgb3: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 18/31] hamradio: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 19/31] airo: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 20/31] ip_tunnel: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 21/31] hippi: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 22/31] sb1000: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 23/31] ppp: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 24/31] wan: " Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 25/31] wan: cosa: remove dead cosa_net_ioctl() function Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 26/31] dev_ioctl: pass SIOCDEVPRIVATE data separately Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 27/31] dev_ioctl: split out ndo_eth_ioctl Arnd Bergmann
2021-07-27 16:30   ` Jason Gunthorpe
2021-07-27 13:45 ` [PATCH net-next v3 28/31] net: split out ndo_siowandev ioctl Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 29/31] net: socket: return changed ifreq from SIOCDEVPRIVATE Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 30/31] net: bridge: move bridge ioctls out of .ndo_do_ioctl Arnd Bergmann
2021-07-27 13:45 ` [PATCH net-next v3 31/31] net: bonding: move ioctl handling to private ndo operation Arnd Bergmann
2021-07-27 20:00 ` [PATCH net-next v3 00/31] ndo_ioctl rework patchwork-bot+netdevbpf

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