linux-kernel - [RFC 07/14] bootsplash: Add VT keyboard hook

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, 25 Oct 2017 14:45:55 +0200
From:   Max Staudt <mstaudt@...e.de>
To:     b.zolnierkie@...sung.com, linux-fbdev@...r.kernel.org
Cc:     mstaudt@...e.de, tiwai@...e.com, oneukum@...e.com, msrb@...e.com,
        sndirsch@...e.com, michal@...kovi.net, linux-kernel@...r.kernel.org
Subject: [RFC 07/14] bootsplash: Add VT keyboard hook

Let's disable the splash if the user presses ESC or F1-F12 on a VT.

The F1-F12 check is to disable the splash on VT switches.

Signed-off-by: Max Staudt <mstaudt@...e.de>
Reviewed-by: Oliver Neukum <oneukum@...e.com>
---
 drivers/tty/vt/keyboard.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c
index f4166263bb3a..177b35182b7c 100644
--- a/drivers/tty/vt/keyboard.c
+++ b/drivers/tty/vt/keyboard.c
@@ -47,6 +47,8 @@
 
 #include <asm/irq_regs.h>
 
+#include <linux/bootsplash.h>
+
 extern void ctrl_alt_del(void);
 
 /*
@@ -1353,6 +1355,15 @@ static void kbd_keycode(unsigned int keycode, int down, int hw_raw)
 	}
 #endif
 
+	/* Deactivate bootsplash on ESC or Alt+Fxx VT switch */
+	if (((keycode >= KEY_F1 && keycode <= KEY_F12) || keycode == KEY_ESC)
+	    && bootsplash_is_enabled()) {
+		bootsplash_disable();
+
+		if (keycode == KEY_ESC)
+			return;
+	}
+
 	if (kbd->kbdmode == VC_MEDIUMRAW) {
 		/*
 		 * This is extended medium raw mode, with keys above 127
-- 
2.12.3