linux-kernel - Re: [regression] 2.6.30 leaking keys on console switch

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 14 Oct 2009 00:50:24 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Jiri Kosina <jkosina@...e.cz>, rjw@...k.pl,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [regression] 2.6.30 leaking keys on console switch

On Wed, Oct 14, 2009 at 12:39:28AM -0700, Dmitry Torokhov wrote:
> On Wed, Oct 14, 2009 at 09:19:50AM +0200, Andi Kleen wrote:
> > > Btw, what kind of keyboard is this? I was playing today but I could not
> > > get my USB keyboards to report release of more than 1 key per report....
> > 
> > The log was with a PS/2<->USB adapter, with a PS/2 keyboard connected
> > to a USB port through it.
> > 
> 
> Hmm, I don't think I have one of those... It is curious beast - we have
> software autorepeat for HID but PS/2 keyboards do autorepeat
> themselves... What will combination do?
> 

Could you please try this incredibly stupid patch?

-- 
Dmitry


Input: autorepeat debug patch

From: Dmitry Torokhov <dmitry.torokhov@...il.com>

Signed-off-by: Dmitry Torokhov <dtor@...l.ru>
---

 drivers/input/input.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)


diff --git a/drivers/input/input.c b/drivers/input/input.c
index 6ba676b..77fa3da 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -137,7 +137,7 @@ static void input_repeat_key(unsigned long data)
 	if (test_bit(dev->repeat_key, dev->key) &&
 	    is_event_supported(dev->repeat_key, dev->keybit, KEY_MAX)) {
 
-		input_pass_event(dev, EV_KEY, dev->repeat_key, 2);
+		input_pass_event(dev, EV_KEY, dev->repeat_key, 200);
 
 		if (dev->sync) {
 			/*
@@ -208,7 +208,15 @@ static void input_handle_event(struct input_dev *dev,
 		if (is_event_supported(code, dev->keybit, KEY_MAX) &&
 		    !!test_bit(code, dev->key) != value) {
 
-			if (value != 2) {
+			if (value == 2 || value == 200) {
+				/* autorepeat */
+				if (!test_bit(code, dev->key)) {
+					printk(KERN_ERR "%s autorepeat for released key %d\n",
+						value == 200 ? "software" : "hardware", code);
+					break;
+				}
+				value = 2;
+			} else {
 				__change_bit(code, dev->key);
 				if (value)
 					input_start_autorepeat(dev, code);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/