diff options
| author | Johan Hovold <johan@kernel.org> | 2017-03-06 17:36:37 +0100 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2017-03-08 16:14:36 +0100 |
| commit | 0b1d250afb8eb9d65afb568bac9b9f9253a82b49 (patch) | |
| tree | 7afcb58437e1546ecf0cb2779b17572ae32a3862 /drivers/usb | |
| parent | 2e46565cf622dd0534a9d8bffe152a577b48d7aa (diff) | |
USB: serial: io_ti: fix NULL-deref in interrupt callback
Fix a NULL-pointer dereference in the interrupt callback should a
malicious device send data containing a bad port number by adding the
missing sanity check.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/serial/io_ti.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/serial/io_ti.c b/drivers/usb/serial/io_ti.c index ceaeebaa6f90..4561dd4cde8b 100644 --- a/drivers/usb/serial/io_ti.c +++ b/drivers/usb/serial/io_ti.c @@ -1674,6 +1674,12 @@ static void edge_interrupt_callback(struct urb *urb) function = TIUMP_GET_FUNC_FROM_CODE(data[0]); dev_dbg(dev, "%s - port_number %d, function %d, info 0x%x\n", __func__, port_number, function, data[1]); + + if (port_number >= edge_serial->serial->num_ports) { + dev_err(dev, "bad port number %d\n", port_number); + goto exit; + } + port = edge_serial->serial->port[port_number]; edge_port = usb_get_serial_port_data(port); if (!edge_port) { |