From: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Unprotected list walks are not necessarily safe.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Signed-off-by: John Ogness <john.ogness@xxxxxxxxxxxxx>
Reviewed-by: Sergey Senozhatsky <senozhatsky@xxxxxxxxxxxx>
---
drivers/tty/serial/kgdboc.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c
index 79b7db8580e0..af2aa76bae15 100644
--- a/drivers/tty/serial/kgdboc.c
+++ b/drivers/tty/serial/kgdboc.c
@@ -193,7 +193,8 @@ static int configure_kgdboc(void)
if (!p)
goto noconfig;
- for_each_console(cons) {
+ console_list_lock();
+ for_each_registered_console(cons) {
int idx;
if (cons->device && cons->device(cons, &idx) == p &&
idx == tty_line) {
@@ -201,6 +202,7 @@ static int configure_kgdboc(void)
break;
}
}
+ console_list_unlock();
kgdb_tty_driver = p;
kgdb_tty_line = tty_line;
--
2.30.2
