Commit 7370a25f authored by Sven Schnelle's avatar Sven Schnelle Committed by Greg Kroah-Hartman
Browse files

tty/vt: prevent registration of console with invalid number 



If a user specifies an invalid console like 'console=tty3000',
the vt driver should prevent setting up a vt entry for that.

Suggested-by: default avatarJiri Slaby <jirislaby@kernel.org>
Signed-off-by: default avatarSven Schnelle <svens@linux.ibm.com>
Link: https://lore.kernel.org/r/20221209112737.3222509-3-svens@linux.ibm.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent db4df8e9

drivers/tty/vt/vt.c

+6 −0
Original line number Diff line number Diff line
@@ -3156,8 +3156,14 @@ static struct tty_driver *vt_console_device(struct console *c, int *index) 
	return console_driver;

}



static int vt_console_setup(struct console *co, char *options)

{

	return co->index >= MAX_NR_CONSOLES ? -EINVAL : 0;

}



static struct console vt_console_driver = {

	.name		= "tty",

	.setup		= vt_console_setup,

	.write		= vt_console_print,

	.device		= vt_console_device,

	.unblank	= unblank_screen,