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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAJfpegtcU_=hhmq9C-n1dkCBOcTX7VzkdXDpOZZNh1iZ73-t0w@mail.gmail.com>
Date:   Thu, 29 Oct 2020 16:25:47 +0100
From:   Miklos Szeredi <miklos@...redi.hu>
To:     Zhiqiang Liu <liuzhiqiang26@...wei.com>
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 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,
Miklos