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
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