Heikki Krogerus 7c96edc6e7 usb: typec: ucsi: Prevent mode overrun ... commit 386e15a650 upstream. Sometimes the embedded controller firmware does not terminate the list of alternate modes that the partner supports in its response to the GET_ALTERNATE_MODES command. Instead the firmware returns the supported alternate modes over and over again until the driver stops requesting them. If that happens, the number of modes for each alternate mode will exceed the maximum 6 that is defined in the USB Power Delivery specification. Making sure that can't happen by adding a check for it. This fixes NULL pointer dereference that is caused by the overrun. Fixes: ad74b8649b ("usb: typec: ucsi: Preliminary support for alternate modes") Cc: stable@vger.kernel.org Reported-by: Zwane Mwaikambo <zwanem@gmail.com> Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Link: https://lore.kernel.org/r/20200916090034.25119-3-heikki.krogerus@linux.intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2020-09-23 12:40:44 +02:00
..
Kconfig	USB: add missing SPDX lines to Kconfig and Makefiles	2019-01-22 09:08:17 +01:00
Makefile	usb: typec: ucsi: Support for DisplayPort alt mode	2019-04-25 11:04:55 +02:00
displayport.c	usb: typec: ucsi: displayport: Fix a potential race during registration	2020-03-25 08:25:51 +01:00
trace.c	usb: typec: ucsi: Preliminary support for alternate modes	2019-04-25 11:03:53 +02:00
trace.h	usb: typec: ucsi: Preliminary support for alternate modes	2019-04-25 11:03:53 +02:00
ucsi.c	usb: typec: ucsi: Prevent mode overrun	2020-09-23 12:40:44 +02:00
ucsi.h	usb: typec: ucsi: ccg: enable runtime pm support	2019-06-08 00:09:20 +02:00
ucsi_acpi.c	usb: typec: ucsi: acpi: Check the _DEP dependencies	2020-09-17 13:47:56 +02:00
ucsi_ccg.c	usb: typec: ucsi: ccg: Remove run_isr flag	2019-10-04 13:51:26 +02:00