Patch "USB: serial: ti_usb_3410_5052: fix NULL-deref at open" has been added to the 4.9-stable tree

Patch "USB: serial: ti_usb_3410_5052: fix NULL-deref at open" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    USB: serial: ti_usb_3410_5052: fix NULL-deref at open

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-ti_usb_3410_5052-fix-null-deref-at-open.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@vger.kernel.org> know about it.


>From ef079936d3cd09e63612834fe2698eeada0d8e3f Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Tue, 3 Jan 2017 16:40:03 +0100
Subject: USB: serial: ti_usb_3410_5052: fix NULL-deref at open

From: Johan Hovold <johan@kernel.org>

commit ef079936d3cd09e63612834fe2698eeada0d8e3f upstream.

Fix NULL-pointer dereference in open() should a malicious device lack
the expected endpoints:

Unable to handle kernel NULL pointer dereference at virtual address 00000030
..
[<bf06a6b0>] (ti_open [ti_usb_3410_5052]) from [<bf02e118>] (serial_port_activate+0x68/0x98 [usbserial])

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/usb/serial/ti_usb_3410_5052.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/usb/serial/ti_usb_3410_5052.c
+++ b/drivers/usb/serial/ti_usb_3410_5052.c
@@ -579,6 +579,13 @@ static int ti_startup(struct usb_serial
 		goto free_tdev;
 	}
 
+	if (serial->num_bulk_in < serial->num_ports ||
+			serial->num_bulk_out < serial->num_ports) {
+		dev_err(&serial->interface->dev, "missing endpoints\n");
+		status = -ENODEV;
+		goto free_tdev;
+	}
+
 	return 0;
 
 free_tdev:


Patches currently in stable-queue which might be from johan@kernel.org are

queue-4.9/usb-serial-io_ti-fix-i-o-after-disconnect.patch
queue-4.9/usb-serial-ti_usb_3410_5052-fix-null-deref-at-open.patch
queue-4.9/usb-serial-kobil_sct-fix-null-deref-in-write.patch
queue-4.9/usb-serial-spcp8x5-fix-null-deref-at-open.patch
queue-4.9/usb-serial-mos7720-fix-parallel-probe.patch
queue-4.9/usb-serial-cyberjack-fix-null-deref-at-open.patch
queue-4.9/usb-serial-mos7720-fix-null-deref-at-open.patch
queue-4.9/usb-serial-garmin_gps-fix-memory-leak-on-failed-urb-submit.patch
queue-4.9/usb-serial-io_ti-fix-null-deref-at-open.patch
queue-4.9/usb-serial-pl2303-fix-null-deref-at-open.patch
queue-4.9/usb-serial-quatech2-fix-sleep-while-atomic-in-close.patch
queue-4.9/usb-serial-iuu_phoenix-fix-null-deref-at-open.patch
queue-4.9/usb-serial-oti6858-fix-null-deref-at-open.patch
queue-4.9/usb-serial-io_edgeport-fix-null-deref-at-open.patch
queue-4.9/usb-serial-mos7720-fix-parport-use-after-free-on-probe-errors.patch
queue-4.9/usb-serial-mos7720-fix-use-after-free-on-probe-errors.patch
queue-4.9/usb-serial-mos7840-fix-null-deref-at-open.patch
queue-4.9/usb-serial-omninet-fix-null-derefs-at-open-and-disconnect.patch
queue-4.9/usb-serial-keyspan_pda-verify-endpoints-at-probe.patch
queue-4.9/usb-serial-io_ti-fix-another-null-deref-at-open.patch