Peter Hurley
b848305276
n_tty: Fix unsafe update of available buffer space ...
receive_room is used to control the amount of data the flip
buffer work can push to the read buffer. This update is unsafe:
CPU 0 | CPU 1
|
| n_tty_read()
| n_tty_set_room()
| left = <calc of space>
n_tty_receive_buf() |
<push data to buffer> |
n_tty_set_room() |
left = <calc of space> |
tty->receive_room = left |
| tty->receive_room = left
receive_room is now updated with a stale calculation of the
available buffer space, and the subsequent work loop will likely
overwrite unread data in the input buffer.
Update receive_room atomically with the calculation of the
available buffer space.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2013-06-17 12:55:30 -07:00
2013-06-10 13:00:29 +02:00
2013-06-03 17:55:09 +09:00
2013-04-29 13:26:48 -04:00
2013-06-03 18:07:38 +01:00
2013-05-17 14:31:05 -04:00
2013-06-12 16:42:39 -07:00
2013-06-12 10:20:54 -04:00
2013-04-11 17:05:37 +00:00
2013-05-07 02:16:21 -04:00
2013-06-03 14:31:39 -07:00
2013-05-30 18:27:24 -07:00
2013-05-07 11:28:42 -07:00
2013-06-05 13:51:29 +02:00
2013-04-26 22:30:25 +02:00
2013-06-10 13:25:50 -07:00
2013-06-08 02:13:44 +05:30
2013-05-21 09:13:11 +02:00
2013-04-29 09:30:25 -07:00
2013-05-09 09:59:16 -07:00
2013-05-09 10:11:48 -07:00
2013-05-13 20:20:02 +01:00
2013-05-23 18:24:10 -07:00
2013-06-11 19:38:27 +10:00
2013-06-12 11:13:38 +02:00
2013-05-21 09:56:55 -07:00
2013-06-07 12:29:31 -07:00
2013-05-07 14:01:27 -07:00
2013-05-21 11:11:45 -07:00
2013-05-07 02:16:21 -04:00
2013-05-11 15:23:17 -07:00
2013-06-04 18:46:45 +01:00
2013-06-04 17:06:46 -07:00
2013-06-05 09:11:06 +09:00
2013-05-06 14:59:13 -07:00
2013-06-08 15:50:42 -07:00
2013-05-20 13:38:14 -07:00
2013-05-24 16:22:51 -07:00
2013-05-08 10:49:18 +09:30
2013-05-02 10:16:16 -07:00
2013-06-13 10:13:29 -07:00
2013-06-01 19:53:41 +09:00
2013-05-18 11:55:52 +02:00
2013-05-07 02:16:21 -04:00
2013-05-08 10:13:35 -07:00
2013-05-22 07:18:41 -07:00
2013-06-14 19:15:36 -10:00
2013-05-26 14:23:11 -04:00
2013-05-18 11:55:55 +02:00
2013-06-13 17:09:40 -07:00
2013-05-21 10:48:41 +02:00
2013-05-15 10:58:22 -07:00
2013-05-04 14:47:26 -04:00
2013-06-13 22:12:14 +01:00
2013-06-01 14:44:25 +02:00
2013-06-01 14:46:42 +02:00
2013-05-30 10:51:20 -07:00
2013-06-07 18:11:02 -07:00
2013-06-01 23:51:48 +02:00
2013-05-02 10:16:16 -07:00
2013-05-25 20:32:49 -07:00
2013-05-01 17:51:54 -07:00
2013-05-25 21:24:15 -07:00
2013-05-18 11:55:58 +02:00
2013-05-24 16:22:51 -07:00
2013-05-30 11:58:40 +01:00
2013-05-07 14:04:56 -07:00
2013-04-12 10:26:24 +02:00
2013-05-07 14:02:00 -07:00
2013-06-12 16:29:46 -07:00
2013-06-13 17:41:18 -07:00
2013-06-01 20:05:20 +09:00
2013-06-04 18:52:05 +01:00
2013-05-09 10:15:46 -07:00
2013-06-06 16:34:11 -07:00
2013-05-31 01:21:28 -07:00
2013-05-18 11:57:30 +02:00
2013-06-17 12:55:30 -07:00
2013-05-21 10:13:23 -07:00
2013-06-17 12:00:22 -07:00
2013-04-29 18:28:43 -07:00
2013-06-05 08:54:16 -06:00
2013-06-11 02:46:21 -07:00
2013-06-08 21:23:33 -07:00
2013-05-18 11:58:03 +02:00
2013-05-18 11:58:04 +02:00
2013-06-10 10:14:33 -04:00
2013-05-01 17:29:18 -04:00
2013-05-04 12:31:18 -07:00
2013-05-04 12:31:18 -07:00
b848305276