X-Loop: help-debbugs@HIDDEN
Subject: [bug#50698] [PATCH] WIP patches for recently-known hurd security vulnerabilities
Resent-From: Maxime Devos <maximedevos@HIDDEN>
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From: Maxime Devos <maximedevos@HIDDEN>
Date: Mon, 20 Sep 2021 12:40:48 +0200
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Hi,
I've tried to patch the glibc package for the problems noted at
<https://lists.gnu.org/archive/html/bug-hurd/2021-08/msg00007.html>;.
I've found two recent patches (glibc-hurd-proc-reauth.patch and
glibc-hurd-sendmsg-SCM_CREDS.patch) that appeared relevant. I tried
to patch our glibc package with those patches.
The modified tarball builds fine for --system=3Dx86_64-linux, but not
for --system=3Di586-gnu (tested with ./pre-inst-env guix build hello
--system=3Di586-gnu). Any idea what's happening here?
Greetings,
Maxime.
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Date: Mon, 04 Oct 2021 15:52:27 +0200
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(Maxime Devos's message of "Mon, 20 Sep 2021 12:40:48 +0200")
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Hi Maxime,
Maxime Devos <maximedevos@HIDDEN> skribis:
> I've tried to patch the glibc package for the problems noted at
> <https://lists.gnu.org/archive/html/bug-hurd/2021-08/msg00007.html>;.
>
> I've found two recent patches (glibc-hurd-proc-reauth.patch and
> glibc-hurd-sendmsg-SCM_CREDS.patch) that appeared relevant. I tried
> to patch our glibc package with those patches.
>
> The modified tarball builds fine for --system=3Dx86_64-linux, but not
> for --system=3Di586-gnu (tested with ./pre-inst-env guix build hello
> --system=3Di586-gnu). Any idea what's happening here?
Thanks for looking into it!
> From cdf38fbfcba4c87777d7ba2175f08e877dafe86a Mon Sep 17 00:00:00 2001
> From: Maxime Devos <maximedevos@HIDDEN>
> Date: Mon, 13 Sep 2021 11:23:21 +0200
> Subject: [PATCH] WIP gnu: glibc: New security patches.
> MIME-Version: 1.0
> Content-Type: text/plain; charset=3DUTF-8
> Content-Transfer-Encoding: 8bit
>
> The existence of the vulnerabilities was noted at
> <https://lists.gnu.org/archive/html/bug-hurd/2021-08/msg00007.html>.
>
> TODO: check if these are all necessary packages for glibc.
> TODO: why does the glibc tarball build for --system=3Dx86_64-linux but not
> for --system=3Di586-gnu?
>
> Build error:
> =E2=80=98patching file hurd/hurdinit.c
> Hunk #1 FAILED at 177.
> 1 out of 1 hunk FAILED -- saving rejects to file hurd/hurdinit.c.rej=E2=
=80=99
>
> but this file isn't modified by the new patches!
>
> * gnu/local.mk (dist_patch_DATA): Register new patches.
> * gnu/packages/base.scm (glibc)[replacement]: Register replacement.
> (glibc/fixed): New variable.
> * gnu/packages/patches/glibc-hurd-proc-reauth.patch: New file.
> * gnu/packages/patches/glibc-hurd-sendmsg-SCM_CREDS.patch.
[...]
> --- a/gnu/packages/base.scm
> +++ b/gnu/packages/base.scm
> @@ -706,6 +706,7 @@ the store.")
> (package
> (name "glibc")
> (version "2.31")
> + (replacement glibc/fixed)
> (source (origin
> (method url-fetch)
> (uri (string-append "mirror://gnu/glibc/glibc-" version ".ta=
r.xz"))
> @@ -966,6 +967,12 @@ with the Linux kernel.")
> (license lgpl2.0+)
> (home-page "https://www.gnu.org/software/libc/")))
>=20=20
> +(define glibc/fixed
> + (package-with-extra-patches
> + glibc
> + (search-patches "glibc-hurd-sendmsg-SCM_CREDS.patch"
> + "glibc-hurd-proc-reauth.patch")))
Instead of a replacement, which makes no sense on GNU/Linux, could you
add a conditional phase for (hurd-target?) that applies the patches?
(On =E2=80=98core-updates=E2=80=99 (or =E2=80=98-frozen=E2=80=99?) we will =
apply patches
unconditionally.)
Not answering your initial question, but maybe the problem will vanish
if you do things this way, who knows. :-)
> +++ b/gnu/packages/patches/glibc-hurd-proc-reauth.patch
> @@ -0,0 +1,114 @@
> +Index: glibc-2.31/hurd/hurdsig.c
Please add a comment explaining what this patch does, what its status
is, with a link to upstream discussions.
Thank you!
Ludo=E2=80=99.
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Ludovic Court=C3=A8s schreef op ma 04-10-2021 om 15:52 [+0200]:
> > +(define glibc/fixed
> > + (package-with-extra-patches
> > + glibc
> > + (search-patches "glibc-hurd-sendmsg-SCM_CREDS.patch"
> > + "glibc-hurd-proc-reauth.patch")))
>=20
> Instead of a replacement, which makes no sense on GNU/Linux, could you
> add a conditional phase for (hurd-target?) that applies the patches?
A replacement would be useless on GNU/Linux, but harmless.
Adding a phase (conditional on (hurd-target?)) to glibc
calling 'patch' on these patches would be possible, but would
cause a world-rebuild for GNU/Hurd (though not for GNU/Linux).
Because i586-gnu is =E2=80=98experimental and under development=E2=80=99
(according to (guix)GNU Distribution), I suppose the (partial)
world-rebuild is acceptable here?=20
Greetings,
Maxime.
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Maxime Devos <maximedevos@HIDDEN> skribis:
> Ludovic Court=C3=A8s schreef op ma 04-10-2021 om 15:52 [+0200]:
>> > +(define glibc/fixed
>> > + (package-with-extra-patches
>> > + glibc
>> > + (search-patches "glibc-hurd-sendmsg-SCM_CREDS.patch"
>> > + "glibc-hurd-proc-reauth.patch")))
>>=20
>> Instead of a replacement, which makes no sense on GNU/Linux, could you
>> add a conditional phase for (hurd-target?) that applies the patches?
>
> A replacement would be useless on GNU/Linux, but harmless.
Performance-wise it would have an impact on GNU/Linux because we=E2=80=99d =
end
up grafting the new glibc on each and every package.
> Adding a phase (conditional on (hurd-target?)) to glibc
> calling 'patch' on these patches would be possible, but would
> cause a world-rebuild for GNU/Hurd (though not for GNU/Linux).
>
> Because i586-gnu is =E2=80=98experimental and under development=E2=80=99
> (according to (guix)GNU Distribution), I suppose the (partial)
> world-rebuild is acceptable here?=20
Yes, I think it=E2=80=99s okay to have a world-rebuild limited to i586-gnu,=
even
more so that the =E2=80=9Cworld=E2=80=9D is pretty small there. :-)
(It essentially stops at =E2=80=98util-linux=E2=80=99 currently.)
Thanks,
Ludo=E2=80=99.
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From: Maxim Cournoyer <maxim.cournoyer@HIDDEN>
In-Reply-To: <87wnmo55if.fsf@HIDDEN> ("Ludovic =?UTF-8?Q?Court=C3=A8s?="'s message of "Fri, 08 Oct 2021 09:40:08 +0200")
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Hi Janneke,
Would you know if this series is still relevant, following your recent
series that update most of the Hurd components?
--
Thanks,
Maxim
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Subject: [bug#50698] [PATCH] WIP patches for recently-known hurd security vulnerabilities
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Maxim Cournoyer writes:
Hey Maxim,
> Would you know if this series is still relevant, following your recent
> series that update most of the Hurd components?
Yes. Debian is still carrying these agains their glibc:
<https://salsa.debian.org/glibc-team/glibc/-/blob/sid/debian/patches/hurd-i=
386/tg-sendmsg-SCM_CREDS.diff>
<https://salsa.debian.org/glibc-team/glibc/-/blob/sid/debian/patches/hurd-i=
386/proc_reauth.diff>
I have no idea about their status or why Debian hasn't upstreamed them.
Maybe now is a good time to add these to glibc/hurd (it seems we still
have a hook for a custom glibc library in place, yay!).
Would you like to rebase/create a patch for the hurd-team branch?
Greetings,
Janneke
--=20
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