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 <stable@xxxxxxxxxxxxxxx> know about it. >From 9ef3c5112139cc5c5666ee096e05bc1e00e94015 Mon Sep 17 00:00:00 2001 From: Sudeep Holla <sudeep.holla@xxxxxxx> Date: Tue, 24 May 2016 17:12:04 +0100 Subject: mailbox: mailbox-test: set tdev->signal to NULL after freeing From: Sudeep Holla <sudeep.holla@xxxxxxx> 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 <sudeep.holla@xxxxxxx> Acked-by: Lee Jones <lee.jones@xxxxxxxxxx> Signed-off-by: Jassi Brar <jaswinder.singh@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- 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@xxxxxxx 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 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html