From 2fbd69c4e33360383907cf0abb245440e62a6f37 Mon Sep 17 00:00:00 2001 From: Johan Hovold Date: Tue, 8 Nov 2016 13:26:50 +0100 Subject: [PATCH] USB: serial: fix invalid user-pointer checks Drop invalid user-pointer checks from ioctl handlers. A NULL-pointer can be valid in user space and copy_to_user() takes care of sanity checking. Signed-off-by: Johan Hovold --- drivers/usb/serial/ftdi_sio.c | 5 ----- drivers/usb/serial/io_edgeport.c | 3 --- drivers/usb/serial/io_ti.c | 3 --- drivers/usb/serial/mos7720.c | 3 --- drivers/usb/serial/mos7840.c | 3 --- drivers/usb/serial/opticon.c | 3 --- drivers/usb/serial/quatech2.c | 3 --- drivers/usb/serial/ssu100.c | 3 --- drivers/usb/serial/ti_usb_3410_5052.c | 3 --- drivers/usb/serial/usb_wwan.c | 3 --- 10 files changed, 32 deletions(-) diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c index b2d767e743fc..bf750e98d204 100644 --- a/drivers/usb/serial/ftdi_sio.c +++ b/drivers/usb/serial/ftdi_sio.c @@ -1452,8 +1452,6 @@ static int get_serial_info(struct usb_serial_port *port, struct ftdi_private *priv = usb_get_serial_port_data(port); struct serial_struct tmp; - if (!retinfo) - return -EFAULT; memset(&tmp, 0, sizeof(tmp)); tmp.flags = priv->flags; tmp.baud_base = priv->baud_base; @@ -1535,9 +1533,6 @@ static int get_lsr_info(struct usb_serial_port *port, struct ftdi_private *priv = usb_get_serial_port_data(port); unsigned int result = 0; - if (!retinfo) - return -EFAULT; - if (priv->transmit_empty) result = TIOCSER_TEMT; diff --git a/drivers/usb/serial/io_edgeport.c b/drivers/usb/serial/io_edgeport.c index 11c05ce2f35f..dcc0c58aaad5 100644 --- a/drivers/usb/serial/io_edgeport.c +++ b/drivers/usb/serial/io_edgeport.c @@ -1554,9 +1554,6 @@ static int get_serial_info(struct edgeport_port *edge_port, { struct serial_struct tmp; - if (!retinfo) - return -EFAULT; - memset(&tmp, 0, sizeof(tmp)); tmp.type = PORT_16550A; diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c index fce82fd79f77..c339163698eb 100644 --- a/drivers/usb/serial/io_ti.c +++ b/drivers/usb/serial/io_ti.c @@ -2459,9 +2459,6 @@ static int get_serial_info(struct edgeport_port *edge_port, struct serial_struct tmp; unsigned cwait; - if (!retinfo) - return -EFAULT; - cwait = edge_port->port->port.closing_wait; if (cwait != ASYNC_CLOSING_WAIT_NONE) cwait = jiffies_to_msecs(cwait) / 10; diff --git a/drivers/usb/serial/mos7720.c b/drivers/usb/serial/mos7720.c index de9992b492b0..d52caa03679c 100644 --- a/drivers/usb/serial/mos7720.c +++ b/drivers/usb/serial/mos7720.c @@ -1861,9 +1861,6 @@ static int get_serial_info(struct moschip_port *mos7720_port, { struct serial_struct tmp; - if (!retinfo) - return -EFAULT; - memset(&tmp, 0, sizeof(tmp)); tmp.type = PORT_16550A; diff --git a/drivers/usb/serial/mos7840.c b/drivers/usb/serial/mos7840.c index 57426d703a09..9a220b8e810f 100644 --- a/drivers/usb/serial/mos7840.c +++ b/drivers/usb/serial/mos7840.c @@ -1956,9 +1956,6 @@ static int mos7840_get_serial_info(struct moschip_port *mos7840_port, if (mos7840_port == NULL) return -1; - if (!retinfo) - return -EFAULT; - memset(&tmp, 0, sizeof(tmp)); tmp.type = PORT_16550A; diff --git a/drivers/usb/serial/opticon.c b/drivers/usb/serial/opticon.c index 4b7bfb394a32..5ded6f524d59 100644 --- a/drivers/usb/serial/opticon.c +++ b/drivers/usb/serial/opticon.c @@ -336,9 +336,6 @@ static int get_serial_info(struct usb_serial_port *port, { struct serial_struct tmp; - if (!serial) - return -EFAULT; - memset(&tmp, 0x00, sizeof(tmp)); /* fake emulate a 16550 uart to make userspace code happy */ diff --git a/drivers/usb/serial/quatech2.c b/drivers/usb/serial/quatech2.c index 85acb50a7ee2..659cb8606bd9 100644 --- a/drivers/usb/serial/quatech2.c +++ b/drivers/usb/serial/quatech2.c @@ -463,9 +463,6 @@ static int get_serial_info(struct usb_serial_port *port, { struct serial_struct tmp; - if (!retinfo) - return -EFAULT; - memset(&tmp, 0, sizeof(tmp)); tmp.line = port->minor; tmp.port = 0; diff --git a/drivers/usb/serial/ssu100.c b/drivers/usb/serial/ssu100.c index 70a098de429f..2a156144c76c 100644 --- a/drivers/usb/serial/ssu100.c +++ b/drivers/usb/serial/ssu100.c @@ -318,9 +318,6 @@ static int get_serial_info(struct usb_serial_port *port, { struct serial_struct tmp; - if (!retinfo) - return -EFAULT; - memset(&tmp, 0, sizeof(tmp)); tmp.line = port->minor; tmp.port = 0; diff --git a/drivers/usb/serial/ti_usb_3410_5052.c b/drivers/usb/serial/ti_usb_3410_5052.c index a8b9bdba314f..8db9d071d940 100644 --- a/drivers/usb/serial/ti_usb_3410_5052.c +++ b/drivers/usb/serial/ti_usb_3410_5052.c @@ -1426,9 +1426,6 @@ static int ti_get_serial_info(struct ti_port *tport, struct serial_struct ret_serial; unsigned cwait; - if (!ret_arg) - return -EFAULT; - cwait = port->port.closing_wait; if (cwait != ASYNC_CLOSING_WAIT_NONE) cwait = jiffies_to_msecs(cwait) / 10; diff --git a/drivers/usb/serial/usb_wwan.c b/drivers/usb/serial/usb_wwan.c index 3dfdfc81254b..59bfcb3da116 100644 --- a/drivers/usb/serial/usb_wwan.c +++ b/drivers/usb/serial/usb_wwan.c @@ -140,9 +140,6 @@ static int get_serial_info(struct usb_serial_port *port, { struct serial_struct tmp; - if (!retinfo) - return -EFAULT; - memset(&tmp, 0, sizeof(tmp)); tmp.line = port->minor; tmp.port = port->port_number; -- GitLab