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 the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: usb-serial-io_ti-fix-null-deref-in-interrupt-callback.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >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 From: Johan Hovold <johan@xxxxxxxxxx> commit 0b1d250afb8eb9d65afb568bac9b9f9253a82b49 upstream. 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") Signed-off-by: Johan Hovold <johan@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/usb/serial/io_ti.c | 6 ++++++ 1 file changed, 6 insertions(+) --- a/drivers/usb/serial/io_ti.c +++ b/drivers/usb/serial/io_ti.c @@ -1674,6 +1674,12 @@ static void edge_interrupt_callback(stru 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) { Patches currently in stable-queue which might be from johan@xxxxxxxxxx are queue-4.9/usb-serial-digi_acceleport-fix-oob-event-processing.patch queue-4.9/usb-serial-omninet-fix-reference-leaks-at-open.patch queue-4.9/usb-serial-digi_acceleport-fix-oob-data-sanity-check.patch queue-4.9/usb-iowarrior-fix-null-deref-in-write.patch queue-4.9/usb-iowarrior-fix-null-deref-at-probe.patch queue-4.9/usb-serial-io_ti-fix-null-deref-in-interrupt-callback.patch queue-4.9/usb-serial-io_ti-fix-information-leak-in-completion-handler.patch queue-4.9/usb-serial-safe_serial-fix-information-leak-in-completion-handler.patch