From b9cbe7e8f27b4e4ab38db5ba5634d12f86574ca7 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Wed, 4 Oct 2023 11:55:10 +0300 Subject: [PATCH] serial: 8250: Check for valid console index Let's not allow negative numbers for console index. Signed-off-by: Tony Lindgren Link: https://lore.kernel.org/r/20231004085511.42645-1-tony@atomide.com Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/8250/8250_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/tty/serial/8250/8250_core.c b/drivers/tty/serial/8250/8250_core.c index 904e319e6b4a..912733151858 100644 --- a/drivers/tty/serial/8250/8250_core.c +++ b/drivers/tty/serial/8250/8250_core.c @@ -611,7 +611,7 @@ static int univ8250_console_setup(struct console *co, char *options) * if so, search for the first available port that does have * console support. */ - if (co->index >= UART_NR) + if (co->index < 0 || co->index >= UART_NR) co->index = 0; /*