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authorMarcel Holtmann <marcel@holtmann.org>2006-10-15 17:30:22 +0200
committerDavid S. Miller <davem@sunset.davemloft.net>2006-10-15 23:14:27 -0700
commite9c5702e3c5558dade169949abd730173e87ef9c (patch)
tree58ec8dcd1497b51e1d6a447d8c4a34a0bd2f108d /net/bluetooth/cmtp
parent39c850863d5e36e72ecf9bc3537ec717bcce97fd (diff)
downloadlinux-e9c5702e3c5558dade169949abd730173e87ef9c.tar.bz2
[Bluetooth] Fix compat ioctl for BNEP, CMTP and HIDP
There exists no attempt do deal with the fact that a structure with a uint32_t followed by a pointer is going to be different for 32-bit and 64-bit userspace. Any 32-bit process trying to use it will be failing with -EFAULT if it's lucky; suffering from having data dumped at a random address if it's not. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net/bluetooth/cmtp')
-rw-r--r--net/bluetooth/cmtp/sock.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/net/bluetooth/cmtp/sock.c b/net/bluetooth/cmtp/sock.c
index 10ad7fd91d83..0547edd57734 100644
--- a/net/bluetooth/cmtp/sock.c
+++ b/net/bluetooth/cmtp/sock.c
@@ -34,6 +34,7 @@
#include <linux/socket.h>
#include <linux/ioctl.h>
#include <linux/file.h>
+#include <linux/compat.h>
#include <net/sock.h>
#include <linux/isdn/capilli.h>
@@ -137,11 +138,43 @@ static int cmtp_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long
return -EINVAL;
}
+#ifdef CONFIG_COMPAT
+static int cmtp_sock_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ if (cmd == CMTPGETCONNLIST) {
+ struct cmtp_connlist_req cl;
+ uint32_t uci;
+ int err;
+
+ if (get_user(cl.cnum, (uint32_t __user *) arg) ||
+ get_user(uci, (u32 __user *) (arg + 4)))
+ return -EFAULT;
+
+ cl.ci = compat_ptr(uci);
+
+ if (cl.cnum <= 0)
+ return -EINVAL;
+
+ err = cmtp_get_connlist(&cl);
+
+ if (!err && put_user(cl.cnum, (uint32_t __user *) arg))
+ err = -EFAULT;
+
+ return err;
+ }
+
+ return cmtp_sock_ioctl(sock, cmd, arg);
+}
+#endif
+
static const struct proto_ops cmtp_sock_ops = {
.family = PF_BLUETOOTH,
.owner = THIS_MODULE,
.release = cmtp_sock_release,
.ioctl = cmtp_sock_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = cmtp_sock_compat_ioctl,
+#endif
.bind = sock_no_bind,
.getname = sock_no_getname,
.sendmsg = sock_no_sendmsg,