linux-kernel - Re: [PATCH -next] tty: ipwireless: Fix potential NULL pointer dereference

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Message-ID: <6797e409-2cad-fb22-c430-28c7915a2812@huawei.com>
Date:   Wed, 30 Jan 2019 18:28:47 +0800
From:   YueHaibing <yuehaibing@...wei.com>
To:     <dsterba@...e.com>, <gregkh@...uxfoundation.org>, <jslaby@...e.com>
CC:     <linux-kernel@...r.kernel.org>, <jikos@...nel.org>
Subject: Re: [PATCH -next] tty: ipwireless: Fix potential NULL pointer
 dereference

Pls ignore this, sorry.

On 2019/1/30 18:26, YueHaibing wrote:
> 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@...wei.com>
> ---
>  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 b0baa4c..1e21ae3 100644
> --- a/drivers/tty/ipwireless/hardware.c
> +++ b/drivers/tty/ipwireless/hardware.c
> @@ -1516,6 +1516,8 @@ 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 -ENOMEM;
>  	ver_packet->header.length = sizeof(struct tl_setup_get_version_qry);
>  
>  	/*
>