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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Nicolas Pitre <nico@linaro.org>
Subject: [PATCH 4.19 083/103] vt: always call notifier with the console lock held
Date:   Tue, 29 Jan 2019 12:36:00 +0100
Message-Id: <20190129113206.434012220@linuxfoundation.org>
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4.19-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Nicolas Pitre <nicolas.pitre@linaro.org>

commit 7e1d226345f89ad5d0216a9092c81386c89b4983 upstream.

Every invocation of notify_write() and notify_update() is performed
under the console lock, except for one case. Let's fix that.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/tty/vt/vt.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -2767,8 +2767,8 @@ rescan_last_byte:
 	con_flush(vc, draw_from, draw_to, &draw_x);
 	vc_uniscr_debug_check(vc);
 	console_conditional_schedule();
-	console_unlock();
 	notify_update(vc);
+	console_unlock();
 	return n;
 }