[PATCH printk v2 01/38] serial: kgdboc: Lock console list in probe function
From: John Ogness <john.ogness@linutronix.de>
Date: 2022-10-19 15:03:05
Also in:
lkml
Subsystem:
kgdb / kdb /debug_core, the rest, tty layer and serial drivers · Maintainers:
Jason Wessel, Daniel Thompson, Linus Torvalds, Greg Kroah-Hartman, Jiri Slaby
From: Thomas Gleixner <redacted> Unprotected list walks are not necessarily safe. Signed-off-by: Thomas Gleixner <redacted> Signed-off-by: John Ogness <john.ogness@linutronix.de> Reviewed-by: Petr Mladek <pmladek@suse.com> --- drivers/tty/serial/kgdboc.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/tty/serial/kgdboc.c b/drivers/tty/serial/kgdboc.c
index 7aa37be3216a..e76f0186c335 100644
--- a/drivers/tty/serial/kgdboc.c
+++ b/drivers/tty/serial/kgdboc.c@@ -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;
--
2.30.2