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USB: serial: console: fix use-after-free after failed setup

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Make sure to reset the USB-console port pointer when console setup fails
in order to avoid having the struct usb_serial be prematurely freed by
the console code when the device is later disconnected.

Fixes: 73e487fdb7 ("[PATCH] USB console: fix disconnection issues")
Cc: stable <stable@vger.kernel.org>	# 2.6.18
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
This commit is contained in:
Johan Hovold 2017-10-04 11:01:13 +02:00
parent bd998c2e0d
commit 299d7572e4
1 changed files with 1 additions and 0 deletions
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1
drivers/usb/serial/console.c
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@ -186,6 +186,7 @@ static int usb_console_setup(struct console *co, char *options)
tty_kref_put(tty);
reset_open_count:
port->port.count = 0;
info->port = NULL;
usb_autopm_put_interface(serial->interface);
error_get_interface:
usb_serial_put(serial);