This is a note to let you know that I've just added the patch titled
HID: magicmouse: sanity check report size in raw_event() callback
to the 3.16-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:
hid-magicmouse-sanity-check-report-size-in-raw_event-callback.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c54def7bd64d7c0b6993336abcffb8444795bf38 Mon Sep 17 00:00:00 2001
From: Jiri Kosina <jkosina@xxxxxxx>
Date: Wed, 27 Aug 2014 09:12:24 +0200
Subject: HID: magicmouse: sanity check report size in raw_event() callback
From: Jiri Kosina <jkosina@xxxxxxx>
commit c54def7bd64d7c0b6993336abcffb8444795bf38 upstream.
The report passed to us from transport driver could potentially be
arbitrarily large, therefore we better sanity-check it so that
magicmouse_emit_touch() gets only valid values of raw_id.
Reported-by: Steven Vittitoe <scvitti@xxxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/hid/hid-magicmouse.c | 10 ++++++++++
1 file changed, 10 insertions(+)
--- a/drivers/hid/hid-magicmouse.c
+++ b/drivers/hid/hid-magicmouse.c
@@ -290,6 +290,11 @@ static int magicmouse_raw_event(struct h
if (size < 4 || ((size - 4) % 9) != 0)
return 0;
npoints = (size - 4) / 9;
+ if (npoints > 15) {
+ hid_warn(hdev, "invalid size value (%d) for TRACKPAD_REPORT_ID\n",
+ size);
+ return 0;
+ }
msc->ntouches = 0;
for (ii = 0; ii < npoints; ii++)
magicmouse_emit_touch(msc, ii, data + ii * 9 + 4);
@@ -307,6 +312,11 @@ static int magicmouse_raw_event(struct h
if (size < 6 || ((size - 6) % 8) != 0)
return 0;
npoints = (size - 6) / 8;
+ if (npoints > 15) {
+ hid_warn(hdev, "invalid size value (%d) for MOUSE_REPORT_ID\n",
+ size);
+ return 0;
+ }
msc->ntouches = 0;
for (ii = 0; ii < npoints; ii++)
magicmouse_emit_touch(msc, ii, data + ii * 8 + 6);
Patches currently in stable-queue which might be from jkosina@xxxxxxx are
queue-3.16/hid-logitech-dj-prevent-false-errors-to-be-shown.patch
queue-3.16/hid-magicmouse-sanity-check-report-size-in-raw_event-callback.patch
queue-3.16/drm-i915-read-head-register-back-in-init_ring_common-to-enforce-ordering.patch
queue-3.16/hid-picolcd-sanity-check-report-size-in-raw_event-callback.patch
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