cdc-acm: fix uninitialized variable
authorOliver Neukum <oneukum@suse.com>
Wed, 2 Nov 2016 13:42:52 +0000 (14:42 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Mon, 7 Nov 2016 09:15:22 +0000 (10:15 +0100)
commit7309aa847ead3fa561663b16779a0dde8c64cc7c
treebaeaaec22975af8624363b49e9ee4881277313cc
parentc289d0eff3d5a594c577c0dc162412a2cad075a4
cdc-acm: fix uninitialized variable

variable struct usb_cdc_parsed_header h may be used
uninitialized in acm_probe.

In kernel 4.8.

    /* handle quirks deadly to normal probing*/
    if (quirks == NO_UNION_NORMAL)

        ...

        goto skip_normal_probe;
    }

we bypass call to

    cdc_parse_cdc_header(&h, intf, buffer, buflen);

but later use h in

    if (h.usb_cdc_country_functional_desc) { /* export the country data */

Signed-off-by: Oliver Neukum <oneukum@suse.com>
CC: stable@vger.kernel.org
Reported-by: Victor Sologoubov <victor0@rambler.ru>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/usb/class/cdc-acm.c