diff options
| author | Sven Schnelle <svens@linux.ibm.com> | 2022-12-09 12:27:37 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-01-19 15:04:56 +0100 |
| commit | 7370a25f9315e732ab7538d6c7e85208176d8fa2 (patch) | |
| tree | ed55ba55ea473b35a2072d3a48d57f6a470021dc /drivers/tty/vt | |
| parent | db4df8e9d79e7d37732c1a1b560958e8dadfefa1 (diff) | |
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: 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>
Diffstat (limited to 'drivers/tty/vt')
| -rw-r--r-- | drivers/tty/vt/vt.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c index 981d2bfcf9a5..62c8a45ad731 100644 --- a/drivers/tty/vt/vt.c +++ b/drivers/tty/vt/vt.c @@ -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, |