linux-kernel - [PATCH 1/2] Allow hvc tty's to pose as vt's

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:	Fri, 14 May 2010 18:10:12 +0200
From:	Soren Hansen <soren@...ux2go.dk>
To:	linux-kernel@...r.kernel.org
Subject: [PATCH 1/2] Allow hvc tty's to pose as vt's

Allow for hvc based tty's to take over the vt driver's major number
and namespace.

Signed-off-by: Soren Hansen <soren@...ux2go.dk>
Tested-By: Major Hayden <major.hayden@...kspace.com>

---
 drivers/char/Kconfig       |    9 ++++++++-
 drivers/char/hvc_console.c |    9 +++++++++
 2 files changed, 17 insertions(+), 1 deletions(-)

diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 6aad99e..8610179 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -5,7 +5,7 @@
 menu "Character devices"
 
 config VT
-	bool "Virtual terminal" if EMBEDDED
+	bool "Virtual terminal"
 	depends on !S390
 	select INPUT
 	default y
@@ -602,6 +602,13 @@ config PPDEV
 
 	  If unsure, say N.
 
+config HVC_TTY_HACK
+	bool "Apply various hacks to make hvc[0-] pretend to be tty[1-]"
+	depends on !VT
+	help
+	  Make unsuspecting guests work happily with the hvc concoles by
+	  tricking them into thinking they're plain old ttys.
+
 config HVC_DRIVER
 	bool
 	help
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index a632f25..4c6b03d 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -43,7 +43,11 @@
 
 #include "hvc_console.h"
 
+#ifdef CONFIG_HVC_TTY_HACK
+#define HVC_MAJOR	4
+#else /* CONFIG_HVC_TTY_HACK */
 #define HVC_MAJOR	229
+#endif /* CONFIG_HVC_TTY_HACK */
 #define HVC_MINOR	0
 
 /*
@@ -848,7 +852,12 @@ static int hvc_init(void)
 
 	drv->owner = THIS_MODULE;
 	drv->driver_name = "hvc";
+#ifdef CONFIG_HVC_TTY_HACK
+	drv->name = "tty";
+	drv->name_base = 1;
+#else /* CONFIG_HVC_TTY_HACK */
 	drv->name = "hvc";
+#endif /* CONFIG_HVC_TTY_HACK */
 	drv->major = HVC_MAJOR;
 	drv->minor_start = HVC_MINOR;
 	drv->type = TTY_DRIVER_TYPE_SYSTEM;
-- 
1.7.0.4

--
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/