NFC: digital: fix possible memory leak in digital_tg_listen_mdaa()

stable inclusion
from stable-v4.19.213
commit 9881b0c860649f27ef2565deef011e516390f416
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9RBHJ


CVE: CVE-2021-47443

--------------------------------

commit 58e7dcc9 upstream.

'params' is allocated in digital_tg_listen_mdaa(), but not free when
digital_send_cmd() failed, which will cause memory leak. Fix it by
freeing 'params' if digital_send_cmd() return failed.

Fixes: 1c7a4c24 ("NFC Digital: Add target NFC-DEP support")
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ziyang Xuan <william.xuanziyang@huawei.com>