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    Subject[PATCH 4.4 33/91] mwifiex: fix unbalanced locking in mwifiex_process_country_ie()
    Date
    From: Brian Norris <briannorris@chromium.org>

    commit 65b1aae0d9d5962faccc06bdb8e91a2a0b09451c upstream.

    We called rcu_read_lock(), so we need to call rcu_read_unlock() before
    we return.

    Fixes: 3d94a4a8373b ("mwifiex: fix possible heap overflow in mwifiex_process_country_ie()")
    Cc: stable@vger.kernel.org
    Cc: huangwen <huangwenabc@gmail.com>
    Cc: Ganapathi Bhat <ganapathi.bhat@nxp.com>
    Signed-off-by: Brian Norris <briannorris@chromium.org>
    Acked-by: Ganapathi Bhat <ganapathi.bhat@nxp.com>
    Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/net/wireless/mwifiex/sta_ioctl.c | 1 +
    1 file changed, 1 insertion(+)

    --- a/drivers/net/wireless/mwifiex/sta_ioctl.c
    +++ b/drivers/net/wireless/mwifiex/sta_ioctl.c
    @@ -232,6 +232,7 @@ static int mwifiex_process_country_ie(st

    if (country_ie_len >
    (IEEE80211_COUNTRY_STRING_LEN + MWIFIEX_MAX_TRIPLET_802_11D)) {
    + rcu_read_unlock();
    mwifiex_dbg(priv->adapter, ERROR,
    "11D: country_ie_len overflow!, deauth AP\n");
    return -EINVAL;

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