From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:40238 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752404AbeBZPzX (ORCPT ); Mon, 26 Feb 2018 10:55:23 -0500 Subject: Patch "iio: buffer: check if a buffer has been set up when poll is called" has been added to the 4.4-stable tree To: stefan.windfeldt@axis.com, Jonathan.Cameron@huawei.com, gregkh@linuxfoundation.org Cc: , From: Date: Mon, 26 Feb 2018 16:55:11 +0100 Message-ID: <151966051177186@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 iio: buffer: check if a buffer has been set up when poll is called to the 4.4-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: iio-buffer-check-if-a-buffer-has-been-set-up-when-poll-is-called.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 4cd140bda6494543f1c1b0ccceceaa44b676eef6 Mon Sep 17 00:00:00 2001 From: Stefan Windfeldt-Prytz Date: Thu, 15 Feb 2018 15:02:53 +0100 Subject: iio: buffer: check if a buffer has been set up when poll is called From: Stefan Windfeldt-Prytz commit 4cd140bda6494543f1c1b0ccceceaa44b676eef6 upstream. If no iio buffer has been set up and poll is called return 0. Without this check there will be a null pointer dereference when calling poll on a iio driver without an iio buffer. Cc: stable@vger.kernel.org Signed-off-by: Stefan Windfeldt-Prytz Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/industrialio-buffer.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/iio/industrialio-buffer.c +++ b/drivers/iio/industrialio-buffer.c @@ -174,7 +174,7 @@ unsigned int iio_buffer_poll(struct file struct iio_dev *indio_dev = filp->private_data; struct iio_buffer *rb = indio_dev->buffer; - if (!indio_dev->info) + if (!indio_dev->info || rb == NULL) return 0; poll_wait(filp, &rb->pollq, wait); Patches currently in stable-queue which might be from stefan.windfeldt@axis.com are queue-4.4/iio-buffer-check-if-a-buffer-has-been-set-up-when-poll-is-called.patch