This is a note to let you know that I've just added the patch titled
usb: chipidea: host: fix NULL ptr dereference during shutdown
to the 4.8-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:
usb-chipidea-host-fix-null-ptr-dereference-during-shutdown.patch
and it can be found in the queue-4.8 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 991d5add50a5bb6ab8f12f2129f5c7487f6baaf6 Mon Sep 17 00:00:00 2001
From: Stefan Wahren <stefan.wahren@xxxxxxxx>
Date: Sat, 10 Sep 2016 12:53:21 +0000
Subject: usb: chipidea: host: fix NULL ptr dereference during shutdown
From: Stefan Wahren <stefan.wahren@xxxxxxxx>
commit 991d5add50a5bb6ab8f12f2129f5c7487f6baaf6 upstream.
After commit b09b5224fe86 ("usb: chipidea: implement platform shutdown
callback") and commit 43a404577a93 ("usb: chipidea: host: set host to
be null after hcd is freed") a NULL pointer dereference is caused
on i.MX23 during shutdown. So ensure that role is set to CI_ROLE_END and
we finish interrupt handling before the hcd is deallocated. This avoids
the NULL pointer dereference.
Suggested-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx>
Fixes: b09b5224fe86 ("usb: chipidea: implement platform shutdown callback")
Signed-off-by: Peter Chen <peter.chen@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/chipidea/host.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -185,6 +185,8 @@ static void host_stop(struct ci_hdrc *ci
if (hcd) {
usb_remove_hcd(hcd);
+ ci->role = CI_ROLE_END;
+ synchronize_irq(ci->irq);
usb_put_hcd(hcd);
if (ci->platdata->reg_vbus && !ci_otg_is_fsm_mode(ci) &&
(ci->platdata->flags & CI_HDRC_TURN_VBUS_EARLY_ON))
Patches currently in stable-queue which might be from stefan.wahren@xxxxxxxx are
queue-4.8/usb-chipidea-host-fix-null-ptr-dereference-during-shutdown.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