Files
kernel/include/linux
Gaurav Kohli b027e2298b tty: fix data race between tty_init_dev and flush of buf
There can be a race, if receive_buf call comes before
tty initialization completes in n_tty_open and tty->disc_data
may be NULL.

CPU0					CPU1
----					----
 000|n_tty_receive_buf_common()   	n_tty_open()
-001|n_tty_receive_buf2()		tty_ldisc_open.isra.3()
-002|tty_ldisc_receive_buf(inline)	tty_ldisc_setup()

Using ldisc semaphore lock in tty_init_dev till disc_data
initializes completely.

Signed-off-by: Gaurav Kohli <gkohli@codeaurora.org>
Reviewed-by: Alan Cox <alan@linux.intel.com>
Cc: stable <stable@vger.kernel.org>

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-01-23 08:57:37 +01:00
..
2017-11-30 16:55:35 +00:00
2017-11-13 01:34:49 +01:00
2017-12-20 11:10:17 -07:00
2017-12-21 02:15:41 +01:00
2017-11-22 21:40:54 +01:00
2017-11-15 18:21:04 -08:00
2017-11-05 16:42:02 -08:00
2017-11-13 01:41:20 +01:00
2017-11-15 18:21:06 -08:00
2017-11-17 16:10:04 -08:00
2017-11-15 18:21:05 -08:00
2017-12-29 21:13:04 +01:00
2017-11-15 18:21:01 -08:00
2017-11-17 16:10:04 -08:00
2017-10-12 15:41:05 +02:00
2017-11-15 18:21:01 -08:00
2017-12-01 13:09:40 -08:00
2017-10-19 10:08:56 +02:00
2017-11-15 18:21:04 -08:00
2017-11-29 18:40:42 -08:00
2017-11-15 18:21:04 -08:00
2017-11-17 16:10:00 -08:00
2017-10-20 09:37:32 +02:00
2017-12-14 16:00:49 -08:00
2017-11-15 18:21:03 -08:00
2017-11-15 18:21:06 -08:00
2017-11-09 10:23:28 +01:00
2017-11-17 16:10:04 -08:00
2017-11-17 16:10:04 -08:00
2017-11-13 01:33:48 +01:00
2017-12-11 10:52:23 -05:00
2017-11-15 18:21:04 -08:00
2017-11-07 12:22:21 +01:00
2017-12-11 08:41:08 +01:00
2017-11-15 18:21:01 -08:00
2017-11-15 18:21:06 -08:00
2017-11-15 18:21:01 -08:00
2017-10-11 22:36:54 -04:00