From: Nicolas Pitre <nicolas.pitre@linaro.org>
Date: Wed, 9 Jan 2019 03:55:00 +0000 (-0500)
Subject: vt: always call notifier with the console lock held
X-Git-Tag: rel_imx_4.19.35_1.1.0~6970
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=18ef43def81cebcdd3b7391b62de84b777814e08;p=linux.git

vt: always call notifier with the console lock held

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>
---

diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index adf5c896cecb..41ad46bf22c5 100644
--- 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;
 }