diff options
| author | Darrick J. Wong <darrick.wong@oracle.com> | 2013-05-10 15:40:13 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-05-21 10:13:23 -0700 |
| commit | b5325a02aa84c794cf520d6d68cae4b150988a32 (patch) | |
| tree | 1f91407c6ac96bed7c0dea018ea0315648601954 /drivers | |
| parent | 89fb9e7c3423662f4969a1e8ef0f5d44835d2381 (diff) | |
| download | linux-b5325a02aa84c794cf520d6d68cae4b150988a32.tar.bz2 | |
ttyprintk: Fix NULL pointer deref by setting tty_port ops after initializing port
tty_port_init() zeroes out the tty port, which means that we have to set the
ops pointer /after/, not before this call. Otherwise, tty_port_open will crash
when it tries to deref ops, which is now a NULL pointer.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/char/ttyprintk.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c index 4945bd3d18d0..d5d2e4a985aa 100644 --- a/drivers/char/ttyprintk.c +++ b/drivers/char/ttyprintk.c @@ -179,7 +179,6 @@ static int __init ttyprintk_init(void) { int ret = -ENOMEM; - tpk_port.port.ops = &null_ops; mutex_init(&tpk_port.port_write_mutex); ttyprintk_driver = tty_alloc_driver(1, @@ -190,6 +189,7 @@ static int __init ttyprintk_init(void) return PTR_ERR(ttyprintk_driver); tty_port_init(&tpk_port.port); + tpk_port.port.ops = &null_ops; ttyprintk_driver->driver_name = "ttyprintk"; ttyprintk_driver->name = "ttyprintk"; |