From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:55289 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752425AbcJENPT (ORCPT ); Wed, 5 Oct 2016 09:15:19 -0400 Subject: Patch "mailbox: mailbox-test: set tdev->signal to NULL after freeing" has been added to the 4.7-stable tree To: sudeep.holla@arm.com, gregkh@linuxfoundation.org, jaswinder.singh@linaro.org, lee.jones@linaro.org Cc: , From: Date: Wed, 05 Oct 2016 15:10:16 +0200 Message-ID: <14756730161112@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 mailbox: mailbox-test: set tdev->signal to NULL after freeing to the 4.7-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: mailbox-mailbox-test-set-tdev-signal-to-null-after-freeing.patch and it can be found in the queue-4.7 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 9ef3c5112139cc5c5666ee096e05bc1e00e94015 Mon Sep 17 00:00:00 2001 From: Sudeep Holla Date: Tue, 24 May 2016 17:12:04 +0100 Subject: mailbox: mailbox-test: set tdev->signal to NULL after freeing From: Sudeep Holla commit 9ef3c5112139cc5c5666ee096e05bc1e00e94015 upstream. tdev->signal is not set NULL after it's freed. This will cause random exceptions when the stale pointer is accessed after tdev->signal is freed. Also, since tdev->signal allocation is skipped the next time it's written, this leads to continuous fault finally leading to the total death of the system. Fixes: d1c2f87c9a8f ("mailbox: mailbox-test: Prevent memory leak") Signed-off-by: Sudeep Holla Acked-by: Lee Jones Signed-off-by: Jassi Brar Signed-off-by: Greg Kroah-Hartman --- drivers/mailbox/mailbox-test.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/mailbox/mailbox-test.c +++ b/drivers/mailbox/mailbox-test.c @@ -133,6 +133,7 @@ static ssize_t mbox_test_message_write(s out: kfree(tdev->signal); kfree(tdev->message); + tdev->signal = NULL; return ret < 0 ? ret : count; } Patches currently in stable-queue which might be from sudeep.holla@arm.com are queue-4.7/arm-dts-imx6sx-sabreauto-fix-misspelled-property.patch queue-4.7/mailbox-mailbox-test-set-tdev-signal-to-null-after-freeing.patch