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From: Andi Kleen <andi@firstfloor.org>
To: speck@linutronix.de
Cc: Andi Kleen <ak@linux.intel.com>
Subject: [MODERATED] [PATCH v6 29/43] MDSv6
Date: Sun, 24 Feb 2019 07:07:35 -0800	[thread overview]
Message-ID: <be3c72dad9a46b412581aeddce4ca8d3f9dc916a.1551019522.git.ak@linux.intel.com> (raw)
In-Reply-To: <cover.1551019522.git.ak@linux.intel.com>
In-Reply-To: <cover.1551019522.git.ak@linux.intel.com>

From: Andi Kleen <ak@linux.intel.com>
Subject:  mds sweep: Clear cpu on processing input layer data

Schedule a clear cpu if input layer data is processed from an interrupt
or timer. User key presses and mouse data is considered sensitive.
We patch some strategic places in the input subsystem
to avoid touching a lot of drivers.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
---
 drivers/input/input.c       | 3 +++
 drivers/input/serio/serio.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/input/input.c b/drivers/input/input.c
index 3304aaaffe87..c22e8e167025 100644
--- a/drivers/input/input.c
+++ b/drivers/input/input.c
@@ -27,6 +27,7 @@
 #include <linux/device.h>
 #include <linux/mutex.h>
 #include <linux/rcupdate.h>
+#include <linux/clearcpu.h>
 #include "input-compat.h"
 
 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
@@ -436,6 +437,7 @@ void input_event(struct input_dev *dev,
 		input_handle_event(dev, type, code, value);
 		spin_unlock_irqrestore(&dev->event_lock, flags);
 	}
+	lazy_clear_cpu_interrupt();
 }
 EXPORT_SYMBOL(input_event);
 
@@ -468,6 +470,7 @@ void input_inject_event(struct input_handle *handle,
 
 		spin_unlock_irqrestore(&dev->event_lock, flags);
 	}
+	lazy_clear_cpu_interrupt();
 }
 EXPORT_SYMBOL(input_inject_event);
 
diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c
index 2e1fb0649260..9b3af41dc05b 100644
--- a/drivers/input/serio/serio.c
+++ b/drivers/input/serio/serio.c
@@ -32,6 +32,7 @@
 #include <linux/slab.h>
 #include <linux/workqueue.h>
 #include <linux/mutex.h>
+#include <linux/clearcpu.h>
 
 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>");
 MODULE_DESCRIPTION("Serio abstraction core");
@@ -1017,6 +1018,8 @@ irqreturn_t serio_interrupt(struct serio *serio,
 		ret = IRQ_HANDLED;
 	}
 
+	lazy_clear_cpu_interrupt();
+
 	spin_unlock_irqrestore(&serio->lock, flags);
 
 	return ret;
-- 
2.17.2

  parent reply	other threads:[~2019-02-24 15:11 UTC|newest]

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-02-24 15:07 [MODERATED] [PATCH v6 00/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 01/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 02/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 03/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 04/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 05/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 06/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 07/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 08/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 09/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 10/43] MDSv6 Andi Kleen
2019-02-25 16:11   ` [MODERATED] " Greg KH
2019-02-25 16:42     ` Andi Kleen
2019-02-25 16:30   ` Greg KH
2019-02-25 16:41     ` [MODERATED] Encrypted Message Jon Masters
2019-02-25 16:58     ` [MODERATED] Re: [PATCH v6 10/43] MDSv6 Andi Kleen
2019-02-25 17:18   ` Dave Hansen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 11/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 12/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 13/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 14/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 15/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 16/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 17/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 18/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 19/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 20/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 21/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 22/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 23/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 24/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 25/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 26/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 27/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 28/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` Andi Kleen [this message]
2019-02-24 15:07 ` [MODERATED] [PATCH v6 30/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 31/43] MDSv6 Andi Kleen
2019-02-25 15:19   ` [MODERATED] " Greg KH
2019-02-25 15:34     ` Andi Kleen
2019-02-25 15:49       ` Greg KH
2019-02-25 15:52         ` [MODERATED] Encrypted Message Jon Masters
2019-02-25 16:00           ` [MODERATED] " Greg KH
2019-02-25 16:19             ` [MODERATED] " Jon Masters
2019-02-25 16:19         ` [MODERATED] Re: [PATCH v6 31/43] MDSv6 Andi Kleen
2019-02-25 16:24         ` mark gross
2019-02-25 16:24         ` Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 32/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 33/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 34/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 35/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [FROZEN] [PATCH v6 36/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 37/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 38/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 39/43] MDSv6 Andi Kleen
2019-02-25 15:26   ` [MODERATED] " Greg KH
2019-02-25 16:28     ` Andi Kleen
2019-02-25 16:47       ` Greg KH
2019-02-25 17:05         ` Andi Kleen
2019-02-25 17:49           ` Greg KH
2019-02-25 18:10             ` Andi Kleen
2019-02-25 20:11               ` Greg KH
2019-02-25 21:00                 ` Greg KH
2019-02-25 21:19                 ` Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 40/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 41/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 42/43] MDSv6 Andi Kleen
2019-02-24 15:07 ` [MODERATED] [PATCH v6 43/43] MDSv6 Andi Kleen

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