linux-kernel - Re: [PATCH] fuse: fix potential accessing NULL pointer problem in fuse_send

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Message-ID: <e91268c8-f384-8a98-f611-7beae329de50@huawei.com>
Date:   Fri, 30 Oct 2020 11:01:27 +0800
From:   Zhiqiang Liu <liuzhiqiang26@...wei.com>
To:     Miklos Szeredi <miklos@...redi.hu>
CC:     Miklos Szeredi <mszeredi@...hat.com>,
        linfeilong <linfeilong@...wei.com>,
        <linux-fsdevel@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        lihaotian <lihaotian9@...wei.com>
Subject: Re: [PATCH] fuse: fix potential accessing NULL pointer problem in
 fuse_send_init()



On 2020/10/29 23:25, Miklos Szeredi wrote:
> On Thu, Oct 22, 2020 at 4:52 PM Zhiqiang Liu <liuzhiqiang26@...wei.com> wrote:
>>
>>
>> In fuse_send_init func, ia is allocated by calling kzalloc func, and
>> we donot check whether ia is NULL before using it. Thus, if allocating
>> ia fails, accessing NULL pointer problem will occur.
> 
> Note the __GFP_NOFAIL flag for kzalloc(), which ensures that it will not fail.

Thanks for your reply.
Please ignore this patch.