diff options
| author | Johan Hovold <johan@kernel.org> | 2021-09-17 12:12:04 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-09-17 11:19:58 +0100 |
| commit | e8f69b16ee776da88589b5271e3f46020efc8f6c (patch) | |
| tree | 227611cd50cddf3faa10caa0a522ecd55643304d /drivers/net/usb/hso.c | |
| parent | fc0c0548c1a2e676d3a928aaed70f2d4d254e395 (diff) | |
| download | linux-e8f69b16ee776da88589b5271e3f46020efc8f6c.tar.gz | |
net: hso: fix muxed tty registration
If resource allocation and registration fail for a muxed tty device
(e.g. if there are no more minor numbers) the driver should not try to
deregister the never-registered (or already-deregistered) tty.
Fix up the error handling to avoid dereferencing a NULL pointer when
attempting to remove the character device.
Fixes: 72dc1c096c70 ("HSO: add option hso driver")
Cc: stable@vger.kernel.org # 2.6.27
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/usb/hso.c')
| -rw-r--r-- | drivers/net/usb/hso.c | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/drivers/net/usb/hso.c b/drivers/net/usb/hso.c index a57251ba5991..f97813a4e8d1 100644 --- a/drivers/net/usb/hso.c +++ b/drivers/net/usb/hso.c @@ -2719,14 +2719,14 @@ struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, serial = kzalloc(sizeof(*serial), GFP_KERNEL); if (!serial) - goto exit; + goto err_free_dev; hso_dev->port_data.dev_serial = serial; serial->parent = hso_dev; if (hso_serial_common_create (serial, 1, CTRL_URB_RX_SIZE, CTRL_URB_TX_SIZE)) - goto exit; + goto err_free_serial; serial->tx_data_length--; serial->write_data = hso_mux_serial_write_data; @@ -2742,11 +2742,9 @@ struct hso_device *hso_create_mux_serial_device(struct usb_interface *interface, /* done, return it */ return hso_dev; -exit: - if (serial) { - tty_unregister_device(tty_drv, serial->minor); - kfree(serial); - } +err_free_serial: + kfree(serial); +err_free_dev: kfree(hso_dev); return NULL; |