Commit 9e409c47 authored by Thomas Gleixner's avatar Thomas Gleixner Committed by Petr Mladek
Browse files

serial: kgdboc: Lock console list in probe function 



Unprotected list walks are not necessarily safe.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarJohn Ogness <john.ogness@linutronix.de>
Reviewed-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: default avatarDouglas Anderson <dianders@chromium.org>
Reviewed-by: default avatarSergey Senozhatsky <senozhatsky@chromium.org>
Reviewed-by: default avatarPetr Mladek <pmladek@suse.com>
Reviewed-by: default avatarDaniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: default avatarPetr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20221116162152.193147-2-john.ogness@linutronix.de
parent 51f5f78a

drivers/tty/serial/kgdboc.c

+2 −0
Original line number Diff line number Diff line
@@ -193,6 +193,7 @@ static int configure_kgdboc(void) 
	if (!p)

		goto noconfig;



	console_lock();

	for_each_console(cons) {

		int idx;

		if (cons->device && cons->device(cons, &idx) == p &&
@@ -201,6 +202,7 @@ static int configure_kgdboc(void) 
			break;

		}

	}

	console_unlock();



	kgdb_tty_driver = p;

	kgdb_tty_line = tty_line;