diff options
| author | Marcel Holtmann <marcel@holtmann.org> | 2006-10-15 19:30:22 +0400 |
|---|---|---|
| committer | David S. Miller <davem@sunset.davemloft.net> | 2006-10-16 10:14:27 +0400 |
| commit | e9c5702e3c5558dade169949abd730173e87ef9c (patch) | |
| tree | 58ec8dcd1497b51e1d6a447d8c4a34a0bd2f108d /net/bluetooth/cmtp | |
| parent | 39c850863d5e36e72ecf9bc3537ec717bcce97fd (diff) | |
| download | linux-e9c5702e3c5558dade169949abd730173e87ef9c.tar.xz | |
[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.c | 33 |
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, |