diff options
| author | Gaurav Kohli <[email protected]> | 2018-01-23 13:16:34 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2018-01-23 08:57:37 +0100 |
| commit | b027e2298bd588d6fa36ed2eda97447fb3eac078 (patch) | |
| tree | 3b90cee88ac74c2828b90b67d67cf7adf6e9e310 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 09df0b3464e528c6a4ca2c48d9ff6d2fd7cbd775 (diff) | |
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 <[email protected]>
Reviewed-by: Alan Cox <[email protected]>
Cc: stable <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions