diff options
| author | Johan Hovold <johan@kernel.org> | 2018-07-04 17:02:16 +0200 |
|---|---|---|
| committer | Johan Hovold <johan@kernel.org> | 2018-07-06 10:32:14 +0200 |
| commit | 01b3cdfca263a17554f7b249d20a247b2a751521 (patch) | |
| tree | c711b2e066902b210528b6ea49fae3d2d436b391 /drivers | |
| parent | 367b160fe4717c14a2a978b6f9ffb75a7762d3ed (diff) | |
USB: serial: keyspan_pda: fix modem-status error handling
Fix broken modem-status error handling which could lead to bits of slab
data leaking to user space.
Fixes: 3b36a8fd6777 ("usb: fix uninitialized variable warning in keyspan_pda")
Cc: stable <stable@vger.kernel.org> # 2.6.27
Signed-off-by: Johan Hovold <johan@kernel.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/serial/keyspan_pda.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/usb/serial/keyspan_pda.c b/drivers/usb/serial/keyspan_pda.c index 5169624d8b11..38d43c4b7ce5 100644 --- a/drivers/usb/serial/keyspan_pda.c +++ b/drivers/usb/serial/keyspan_pda.c @@ -369,8 +369,10 @@ static int keyspan_pda_get_modem_info(struct usb_serial *serial, 3, /* get pins */ USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN, 0, 0, data, 1, 2000); - if (rc >= 0) + if (rc == 1) *value = *data; + else if (rc >= 0) + rc = -EIO; kfree(data); return rc; |