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    Subject[PATCH AUTOSEL 4.9 048/251] tty: ipwireless: Fix potential NULL pointer dereference
    Date
    From: YueHaibing <yuehaibing@huawei.com>

    [ Upstream commit 7dd50e205b3348dc7784efbdf85723551de64a25 ]

    There is a potential NULL pointer dereference in case
    alloc_ctrl_packet() fails and returns NULL.

    Fixes: 099dc4fb6265 ("ipwireless: driver for PC Card 3G/UMTS modem")
    Signed-off-by: YueHaibing <yuehaibing@huawei.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/tty/ipwireless/hardware.c | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/drivers/tty/ipwireless/hardware.c b/drivers/tty/ipwireless/hardware.c
    index df0204b6148f..4417f7568422 100644
    --- a/drivers/tty/ipwireless/hardware.c
    +++ b/drivers/tty/ipwireless/hardware.c
    @@ -1515,6 +1515,8 @@ static void ipw_send_setup_packet(struct ipw_hardware *hw)
    sizeof(struct ipw_setup_get_version_query_packet),
    ADDR_SETUP_PROT, TL_PROTOCOLID_SETUP,
    TL_SETUP_SIGNO_GET_VERSION_QRY);
    + if (!ver_packet)
    + return;
    ver_packet->header.length = sizeof(struct tl_setup_get_version_qry);

    /*
    --
    2.20.1
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