From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Liu Shixin <liushixin2@huawei.com>
Cc: Suren Baghdasaryan <surenb@google.com>,
Vlastimil Babka <vbabka@suse.cz>,
stable@vger.kernel.org, "Jann Horn," <jannh@google.com>,
Mikulas Patocka <mpatocka@redhat.com>
Subject: Re: Questions about backports of fixes for "CoW after fork() issue"
Date: Wed, 16 Jun 2021 11:36:41 +0200 [thread overview]
Message-ID: <YMnGKd79OGeOvRap@kroah.com> (raw)
In-Reply-To: <add3f456-052e-6f40-2949-0685b563fdee@huawei.com>
On Wed, Jun 16, 2021 at 05:28:54PM +0800, Liu Shixin wrote:
> On 2021/6/16 15:11, Suren Baghdasaryan wrote:
> > On Tue, Jun 15, 2021 at 11:52 PM Greg Kroah-Hartman
> > <gregkh@linuxfoundation.org> wrote:
> >> On Wed, Jun 16, 2021 at 02:47:15PM +0800, Liu Shixin wrote:
> >>> Hi, Suren,
> >>>
> >>> I read the previous discussion about fixing CVE-2020-29374 in stable 4.14 and 4.19 in
> >>> <https://lore.kernel.org/linux-mm/20210401181741.168763-1-surenb@google.com/>
> >>>
> >>> https://lore.kernel.org/linux-mm/20210401181741.168763-1-surenb@google.com/
> >>>
> >>> And the results of the discussion is that you backports of 17839856fd58 for 4.14 and
> >>>
> >>> 4.19 kernels.
> >>>
> >>> But the bug about dax and strace in the discussion has not been solved, right? I don't
> >>>
> >>> find a conclusion on this issue, am I missing something? Does this problem still exist in
> >>>
> >>> the stable 4.14 and 4.19 kernel?
> > That is my understanding after discussions with Andrea but I did not
> > verify that myself. As Greg pointed out, the best way would be to try
> > it out.
> > Thanks,
> > Suren.
> >
> >> As the code is all there for you, can you just test them and see for
> >> yourself?
> >>
> >> thanks,
> >>
> >> greg k-h
> > .
> >
> Thank you both for replies. I have tested it in stable 4.19 kernel and the bug is existed as expected.
Great, can you provide a working backport of the patches needed to solve
this for 4.19 so that we can apply them?
thanks,
greg k-h
next prev parent reply other threads:[~2021-06-16 9:36 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <f546c93e-0e36-03a1-fb08-67f46c83d2e7@huawei.com>
2021-06-16 6:52 ` Questions about backports of fixes for "CoW after fork() issue" Greg Kroah-Hartman
2021-06-16 7:11 ` Suren Baghdasaryan
2021-06-16 9:28 ` Liu Shixin
2021-06-16 9:36 ` Greg Kroah-Hartman [this message]
2021-06-16 10:17 ` Vlastimil Babka
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