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USB: serial: kl5kusb105: abort on open exception path

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commit 3c3dd1e058 upstream.

Function klsi_105_open() calls usb_control_msg() (to "enable read") and
checks its return value. When the return value is unexpected, it only
assigns the error code to the return variable retval, but does not
terminate the exception path. This patch fixes the bug by inserting
"goto err_generic_close;" when the call to usb_control_msg() fails.

Fixes: 1da177e4c3 ("Linux-2.6.12-rc2")
Signed-off-by: Pan Bian <bianpan2016@163.com>
[johan: rebase on prerequisite fix and amend commit message]
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pan Bian
2016-11-29 16:55:02 +01:00
committed by Greg Kroah-Hartman
parent e7c72dccd7
commit 8da83724d4
1 changed files with 2 additions and 0 deletions
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2
drivers/usb/serial/kl5kusb105.c
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@@ -311,6 +311,7 @@ static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port)
if (rc < 0) {
dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc);
retval = rc;
goto err_generic_close;
} else
dev_dbg(&port->dev, "%s - enabled reading\n", __func__);
@@ -337,6 +338,7 @@ err_disable_read:
0, /* index */
NULL, 0,
KLSI_TIMEOUT);
err_generic_close:
usb_serial_generic_close(port);
err_free_cfg:
kfree(cfg);