From 9646e7ce3d1955478aa0573b36c151ab4b649486 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Fri, 6 Nov 2009 22:51:16 -0800 Subject: net, compat_ioctl: handle socket ioctl abuses in tty drivers Slip and a few other drivers use the same ioctl numbers on tty devices that are normally meant for sockets. This causes problems with our compat_ioctl handling that tries to convert the data structures in a different format. Fortunately, these five drivers all use 32 bit compatible data structures in the ioctl numbers, so we can just add a trivial compat_ioctl conversion function to each of them. SIOCSIFENCAP and SIOCGIFENCAP do not need to live in fs/compat_ioctl.c after this any more, and they are not used on any sockets. Signed-off-by: Arnd Bergmann Signed-off-by: David S. Miller --- drivers/net/hamradio/6pack.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers/net/hamradio/6pack.c') diff --git a/drivers/net/hamradio/6pack.c b/drivers/net/hamradio/6pack.c index fb588301a05..689b9bd377a 100644 --- a/drivers/net/hamradio/6pack.c +++ b/drivers/net/hamradio/6pack.c @@ -34,6 +34,7 @@ #include #include #include +#include #include #define SIXPACK_VERSION "Revision: 0.3.0" @@ -777,6 +778,23 @@ static int sixpack_ioctl(struct tty_struct *tty, struct file *file, return err; } +#ifdef CONFIG_COMPAT +static long sixpack_compat_ioctl(struct tty_struct * tty, struct file * file, + unsigned int cmd, unsigned long arg) +{ + switch (cmd) { + case SIOCGIFNAME: + case SIOCGIFENCAP: + case SIOCSIFENCAP: + case SIOCSIFHWADDR: + return sixpack_ioctl(tty, file, cmd, + (unsigned long)compat_ptr(arg)); + } + + return -ENOIOCTLCMD; +} +#endif + static struct tty_ldisc_ops sp_ldisc = { .owner = THIS_MODULE, .magic = TTY_LDISC_MAGIC, @@ -784,6 +802,9 @@ static struct tty_ldisc_ops sp_ldisc = { .open = sixpack_open, .close = sixpack_close, .ioctl = sixpack_ioctl, +#ifdef CONFIG_COMPAT + .compat_ioctl = sixpack_compat_ioctl, +#endif .receive_buf = sixpack_receive_buf, .write_wakeup = sixpack_write_wakeup, }; -- cgit v1.2.3-70-g09d2