From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:41849 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751958AbcFRRC4 (ORCPT ); Sat, 18 Jun 2016 13:02:56 -0400 Subject: Patch "gpiolib: Fix NULL pointer deference" has been added to the 4.6-stable tree To: ricardo.ribalda@gmail.com, gregkh@linuxfoundation.org, linus.walleij@linaro.org Cc: , From: Date: Sat, 18 Jun 2016 10:02:55 -0700 Message-ID: <1466269375130130@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled gpiolib: Fix NULL pointer deference to the 4.6-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: gpiolib-fix-null-pointer-deference.patch and it can be found in the queue-4.6 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 11f33a6d15bfa397867ac0d7f3481b6dd683286f Mon Sep 17 00:00:00 2001 From: Ricardo Ribalda Delgado Date: Fri, 3 Jun 2016 19:10:01 +0200 Subject: gpiolib: Fix NULL pointer deference From: Ricardo Ribalda Delgado commit 11f33a6d15bfa397867ac0d7f3481b6dd683286f upstream. Under some circumstances, a gpiochip might be half cleaned from the gpio_device list. This patch makes sure that the chip pointer is still valid, before calling the match function. [ 104.088296] BUG: unable to handle kernel NULL pointer dereference at 0000000000000090 [ 104.089772] IP: [] of_gpiochip_find_and_xlate+0x15/0x80 [ 104.128273] Call Trace: [ 104.129802] [] ? of_parse_own_gpio+0x1f0/0x1f0 [ 104.131353] [] gpiochip_find+0x60/0x90 [ 104.132868] [] of_get_named_gpiod_flags+0x9a/0x120 ... [ 104.141586] [] gpio_led_probe+0x11b/0x360 Signed-off-by: Ricardo Ribalda Delgado Signed-off-by: Linus Walleij Signed-off-by: Greg Kroah-Hartman --- drivers/gpio/gpiolib.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -841,7 +841,7 @@ struct gpio_chip *gpiochip_find(void *da spin_lock_irqsave(&gpio_lock, flags); list_for_each_entry(gdev, &gpio_devices, list) - if (match(gdev->chip, data)) + if (gdev->chip && match(gdev->chip, data)) break; /* No match? */ Patches currently in stable-queue which might be from ricardo.ribalda@gmail.com are queue-4.6/gpiolib-fix-unaligned-used-of-reference-counters.patch queue-4.6/gpiolib-fix-null-pointer-deference.patch