Commit 536a3440 authored Aug 07, 2012 by Jiri Slaby Committed by Greg Kroah-Hartman Aug 10, 2012

TTY: ttyprintk, initialize tty_port earlier



After tty_register_driver is called, it is too late to initialize a
guy with which we operate in open. When a process already called
open(2) on that node, the structures may be in use uninitialized.

Move the initialization prior to tty_register_driver.

Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Samo Pogacnik <samo_pogacnik@t-2.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent ee8b593a

drivers/char/ttyprintk.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -180,6 +180,10 @@ static int __init ttyprintk_init(void)
		int ret = -ENOMEM;
		void *rp;

		tty_port_init(&tpk_port.port);
		tpk_port.port.ops = &null_ops;
		mutex_init(&tpk_port.port_write_mutex);

		ttyprintk_driver = alloc_tty_driver(1);
		if (!ttyprintk_driver)
		return ret;
		@@ -210,10 +214,6 @@ static int __init ttyprintk_init(void)
		goto error;
		}

		tty_port_init(&tpk_port.port);
		tpk_port.port.ops = &null_ops;
		mutex_init(&tpk_port.port_write_mutex);

		return 0;

		error: