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USB: serial: fix invalid user-pointer checks

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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 <johan@kernel.org>
This commit is contained in:
Johan Hovold 2016-11-08 13:26:50 +01:00
parent a98b69002a
commit 2fbd69c4e3
10 changed files with 0 additions and 32 deletions
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5
drivers/usb/serial/ftdi_sio.c
View File

@ -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;

3
drivers/usb/serial/io_edgeport.c
View File

@ -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;

3
drivers/usb/serial/io_ti.c
View File

@ -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;

3
drivers/usb/serial/mos7720.c
View File

@ -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;

3
drivers/usb/serial/mos7840.c
View File

@ -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;

3
drivers/usb/serial/opticon.c
View File

@ -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 */

3
drivers/usb/serial/quatech2.c
View File

@ -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;

3
drivers/usb/serial/ssu100.c
View File

@ -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;

3
drivers/usb/serial/ti_usb_3410_5052.c
View File

@ -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;

3
drivers/usb/serial/usb_wwan.c
View File

@ -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;