Commit 0ce7fd9f authored Jun 12, 2019 by Heikki Krogerus Committed by Will McVicker Mar 12, 2020

UPSTREAM: usb: typec: Make sure an alt mode exist before getting its partner



Adding check to typec_altmode_get_partner() to prevent
potential NULL pointer dereference.

Bug: 150877929
Reported-by: Vladimir Yerilov <openmindead@gmail.com>
Fixes: ad74b8649bea ("usb: typec: ucsi: Preliminary support for alternate modes")
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Change-Id: I600cfd688ed936e45f45aad409d3b166664038d4
Signed-off-by: Will McVicker <willmcvicker@google.com>
(cherry picked from commit 5f54a85db5df67df8161739a4b2f9c2b7ab219fe)

parent 20859c29

drivers/usb/typec/bus.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -192,7 +192,7 @@ EXPORT_SYMBOL_GPL(typec_altmode_vdm);
		const struct typec_altmode *
		typec_altmode_get_partner(struct typec_altmode *adev)
		{
		return &to_altmode(adev)->partner->adev;
		return adev ? &to_altmode(adev)->partner->adev : NULL;
		}
		EXPORT_SYMBOL_GPL(typec_altmode_get_partner);