This is a note to let you know that I've just added the patch titled
USB: serial: fix potential NULL-dereference at probe
to the 4.8-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-fix-potential-null-dereference-at-probe.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 126d26f66d9890a69158812a6caa248c05359daa Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Fri, 21 Oct 2016 12:56:27 +0200
Subject: USB: serial: fix potential NULL-dereference at probe
From: Johan Hovold <johan@xxxxxxxxxx>
commit 126d26f66d9890a69158812a6caa248c05359daa upstream.
Make sure we have at least one port before attempting to register a
console.
Currently, at least one driver binds to a "dummy" interface and requests
zero ports for it. Should such an interface also lack endpoints, we get
a NULL-deref during probe.
Fixes: e5b1e2062e05 ("USB: serial: make minor allocation dynamic")
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/serial/usb-serial.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/usb/serial/usb-serial.c
+++ b/drivers/usb/serial/usb-serial.c
@@ -1078,7 +1078,8 @@ static int usb_serial_probe(struct usb_i
serial->disconnected = 0;
- usb_serial_console_init(serial->port[0]->minor);
+ if (num_ports > 0)
+ usb_serial_console_init(serial->port[0]->minor);
exit:
module_put(type->driver.owner);
return 0;
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-4.8/usb-serial-cp210x-fix-tiocmget-error-handling.patch
queue-4.8/usb-serial-ftdi_sio-add-support-for-infineon-triboard-tc2x7.patch
queue-4.8/usb-serial-fix-potential-null-dereference-at-probe.patch
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