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tty/vt: prevent registration of console with invalid number

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

Suggested-by: Jiri Slaby <jirislaby@kernel.org>
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Link: https://lore.kernel.org/r/20221209112737.3222509-3-svens@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sven Schnelle 2022-12-09 12:27:37 +01:00 committed by Greg Kroah-Hartman
parent db4df8e9d7
commit 7370a25f93
1 changed files with 6 additions and 0 deletions
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6
drivers/tty/vt/vt.c
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@ -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,