From: Miklos Szeredi <miklos@szeredi.hu>
To: Yao Haidong <yaohaidong369@gmail.com>
Cc: Orson Zhai <orsonzhai@gmail.com>,
Chunyan Zhang <zhang.lyra@gmail.com>,
Chunyan Zhang <Chunyan.Zhang@unisoc.com>,
Orson Zhai <Orson.Zhai@unisoc.com>,
Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@kernel.org>,
overlayfs <linux-unionfs@vger.kernel.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
network dev <netdev@vger.kernel.org>, bpf <bpf@vger.kernel.org>,
stable <stable@vger.kernel.org>,
Haidong Yao <haidong.yao@unisoc.com>
Subject: Re: [PATCH] ovl: useing ovl_revert_creds() instead of revert_creds(),
Date: Wed, 19 May 2021 06:03:41 +0200 [thread overview]
Message-ID: <CAJfpegv_TPLFumONsoCOKP5vuO7Gdy91TkV3LUvNg4tdPSs6zA@mail.gmail.com> (raw)
In-Reply-To: <CA+kUaCcaZCb4+zqQthsUvEApG4xFdGsSZ_vQ_1s=G49JHQQh9w@mail.gmail.com>
On Wed, 19 May 2021 at 05:29, Yao Haidong <yaohaidong369@gmail.com> wrote:
> Miklos Szeredi <miklos@szeredi.hu> 于2021年5月18日周二 下午9:41写道:
> >
> > On Tue, 18 May 2021 at 14:21, Haidong Yao <yaohaidong369@gmail.com> wrote:
> > >
> > > From: Haidong Yao <haidong.yao@unisoc.com>
[...]
> > > diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
> > > index 4d53d3b7e5fe..d9bc658f22ee 100644
> > > --- a/fs/overlayfs/file.c
> > > +++ b/fs/overlayfs/file.c
> > > @@ -60,7 +60,7 @@ static struct file *ovl_open_realfile(const struct file *file,
> > > realfile = open_with_fake_path(&file->f_path, flags, realinode,
> > > current_cred());
> > > }
> > > - revert_creds(old_cred);
> > > + ovl_revert_creds(inode->i_sb, old_cred);
> >
> > Upstream kernel doesn't have ovl_revert_creds().
> Hi Miklos:
>
> Sorry,
> Sometimes,old_cred is NULL.
> Do you think this is a problem?
> Can I add ovl_revert_creds()? or You have a better way?
old_cred can't be NULL on upstream (Linus) kernel.
From the taint flags I can see that this is some weird setup. Please
contact the distro that is providing the kerne/modules about this
issue. It's not anything the upstream kernel maintainers can help
with.
Thanks,
Miklos
prev parent reply other threads:[~2021-05-19 4:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-18 12:21 [PATCH] ovl: useing ovl_revert_creds() instead of revert_creds(), Haidong Yao
2021-05-18 13:41 ` Miklos Szeredi
2021-05-19 3:29 ` Yao Haidong
2021-05-19 4:03 ` Miklos Szeredi [this message]
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