Patch "ACPI / watchdog: Fix off-by-one error at resource assignment" has been added to the 4.9-stable tree

Patch "ACPI / watchdog: Fix off-by-one error at resource assignment" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    ACPI / watchdog: Fix off-by-one error at resource assignment

to the 4.9-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:
     acpi-watchdog-fix-off-by-one-error-at-resource-assignment.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From b1abf6fc49829d89660c961fafe3f90f3d843c55 Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Mon, 19 Mar 2018 14:51:49 +0100
Subject: ACPI / watchdog: Fix off-by-one error at resource assignment

From: Takashi Iwai <tiwai@suse.de>

commit b1abf6fc49829d89660c961fafe3f90f3d843c55 upstream.

The resource allocation in WDAT watchdog has off-one-by error, it sets
one byte more than the actual end address.  This may eventually lead
to unexpected resource conflicts.

Fixes: 058dfc767008 (ACPI / watchdog: Add support for WDAT hardware watchdog)
Cc: 4.9+ <stable@vger.kernel.org> # 4.9+
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/acpi/acpi_watchdog.c |    4 ++--
 drivers/watchdog/wdat_wdt.c  |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/acpi/acpi_watchdog.c
+++ b/drivers/acpi/acpi_watchdog.c
@@ -74,10 +74,10 @@ void __init acpi_watchdog_init(void)
 		res.start = gas->address;
 		if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
 			res.flags = IORESOURCE_MEM;
-			res.end = res.start + ALIGN(gas->access_width, 4);
+			res.end = res.start + ALIGN(gas->access_width, 4) - 1;
 		} else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
 			res.flags = IORESOURCE_IO;
-			res.end = res.start + gas->access_width;
+			res.end = res.start + gas->access_width - 1;
 		} else {
 			pr_warn("Unsupported address space: %u\n",
 				gas->space_id);
--- a/drivers/watchdog/wdat_wdt.c
+++ b/drivers/watchdog/wdat_wdt.c
@@ -392,7 +392,7 @@ static int wdat_wdt_probe(struct platfor
 
 		memset(&r, 0, sizeof(r));
 		r.start = gas->address;
-		r.end = r.start + gas->access_width;
+		r.end = r.start + gas->access_width - 1;
 		if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
 			r.flags = IORESOURCE_MEM;
 		} else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) {


Patches currently in stable-queue which might be from tiwai@suse.de are

queue-4.9/alsa-aloop-fix-access-to-not-yet-ready-substream-via-cable.patch
queue-4.9/bluetooth-btusb-fix-quirk-for-atheros-1525-qca6174.patch
queue-4.9/alsa-hda-realtek-always-immediately-update-mute-led-with-pin-vref.patch
queue-4.9/alsa-usb-audio-fix-parsing-descriptor-of-uac2-processing-unit.patch
queue-4.9/alsa-aloop-sync-stale-timer-before-release.patch
queue-4.9/acpi-watchdog-fix-off-by-one-error-at-resource-assignment.patch