This is a note to let you know that I've just added the patch titled USB: serial: io_ti: fix NULL-deref in interrupt callback to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch. The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.) The patch will hopefully also be merged in Linus's tree for the next -rc kernel release. If you have any questions about this process, please let me know. >From 0b1d250afb8eb9d65afb568bac9b9f9253a82b49 Mon Sep 17 00:00:00 2001 From: Johan Hovold <johan@xxxxxxxxxx> Date: Mon, 6 Mar 2017 17:36:37 +0100 Subject: 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@xxxxxxxxxxxxxxx> Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> --- drivers/usb/serial/io_ti.c | 6 ++++++ 1 file changed, 6 insertions(+) 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) { -- 2.12.0