From: Eric Blake <eblake@redhat.com>
To: Sam James <sam@gentoo.org>
Cc: "Carlos O'Donell via Libc-alpha" <libc-alpha@sourceware.org>,
autoconf@gnu.org, c-std-porting@lists.linux.dev,
"Zack Weinberg" <zack@owlfolio.org>,
"David Seifert" <soap@gentoo.org>,
"Gentoo Toolchain" <toolchain@gentoo.org>,
"Arsen Arsenović" <arsen@aarsen.me>,
"Paul Eggert" <eggert@cs.ucla.edu>,
berrange@redhat.com, rjones@redhat.com
Subject: Re: On time64 and Large File Support
Date: Wed, 1 Mar 2023 16:38:59 -0600 [thread overview]
Message-ID: <20230301223859.chl5o3bedqckf3tx@redhat.com> (raw)
In-Reply-To: <A6582515-25ED-4F71-B924-4431F8139376@gentoo.org>
[replying to the original post, because I'm not sure where else in the
more recent activity on this thread would be more appropriate]
On Fri, Nov 11, 2022 at 08:38:18AM +0000, Sam James wrote:
> Hi all,
>
> In Gentoo, we've been planning out what we should do for time64 on glibc [0]
> and concluded that we need some support in glibc for a newer option. I'll outline
> why below.
>
...
>
> Indeed, the gnulib version of change #2 is exactly how we ended up with
> wget/gnutls breaking [1]. I feel this shows that the only approach
> "supported" by glibc right now is untenable.
> [1] https://bugs.gentoo.org/828001
Now Fedora is also being hit by the gnutls ABI change due to time_t in
public interfaces being silently changed. From an IRC conversation I
had with Dan Berrange and Rich Jones (I think Rich mean i686 below):
<danpb> rjones (IRC): oh wow, the certificates created on i696 are not quite right .....
<danpb> Validity:
<danpb> Not Before: Sat Sep 05 00:23:57 UTC 2703
<danpb> Not After: Sun Sep 06 00:23:57 UTC 2703
<danpb> just a few years too early
<danpb> i think this is looking like a gnutls regression, downgrading gnutls makes it work
...
<danpb> rjones (IRC): hmm, i'm beginning to think gnutls has been miscompiled by gcc
<danpb> gnutls_x509_crt_get_activation_time inside the gnutls verification api returns garbage
<danpb> but the very same call done from a demo program returns the right answer
...
<danpb> OMG, gnulib-- has silently changed gnutls to use 64-bit time_t
<danpb> ...which is an ABI incompatibility because gnutls has public APIs which have time_t parameters
<danpb> so apps talking to gnutls will expect 32-bit time_t, but gnutls is processing 64-bit time_t
<danpb> this is utterly insane
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
next prev parent reply other threads:[~2023-03-01 22:39 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-11 8:38 Sam James
2022-11-11 9:16 ` Paul Eggert
2022-11-11 9:19 ` Sam James
2022-11-11 23:48 ` Joseph Myers
2022-11-11 9:19 ` Florian Weimer
2022-11-11 9:27 ` Sam James
2022-11-11 11:38 ` Florian Weimer
2022-11-11 20:12 ` Paul Eggert
2022-11-12 2:20 ` Zack Weinberg
2022-11-12 3:57 ` Sam James
2022-11-12 14:16 ` Zack Weinberg
2022-11-12 17:41 ` Paul Eggert
2022-11-12 18:50 ` Bruno Haible
2022-11-12 19:15 ` Paul Eggert
2022-11-12 20:23 ` Wookey
2022-11-12 20:54 ` Russ Allbery
2022-11-12 21:31 ` Paul Eggert
2022-11-15 5:09 ` Sam James
2022-11-12 18:19 ` Paul Eggert
2022-11-11 9:40 ` Andreas K. Huettel
2022-11-11 11:30 ` Florian Weimer
2022-11-11 19:01 ` Andreas K. Huettel
2022-11-11 19:28 ` Palmer Dabbelt
2022-11-11 9:46 ` Paul Eggert
2022-11-11 11:22 ` Florian Weimer
2022-11-11 19:56 ` Paul Eggert
2022-11-12 4:20 ` Wookey
2022-11-12 4:28 ` Sam James
2022-11-12 4:56 ` Wookey
2022-11-12 4:59 ` Sam James
2022-11-12 18:33 ` Paul Eggert
2022-11-14 8:39 ` Adam Sampson
2022-11-14 11:47 ` Florian Weimer
2022-11-14 20:26 ` Arsen Arsenović
2022-11-14 20:52 ` Florian Weimer
2022-11-15 7:39 ` Arsen Arsenović
2022-11-11 10:25 ` Richard Purdie
2023-03-01 22:38 ` Eric Blake [this message]
2023-03-02 0:29 ` Demi Marie Obenour
2023-03-02 9:04 ` Daniel P. Berrangé
2023-03-02 10:28 ` Paul Eggert
2023-03-02 10:38 ` Andreas Schwab
2023-03-03 5:46 ` Paul Eggert
2023-03-06 8:58 ` Andreas Schwab
2023-03-06 10:19 ` Florian Weimer
2023-03-02 11:02 ` Richard W.M. Jones
2023-03-02 12:17 ` Bruno Haible
2023-03-02 13:24 ` Daniel P. Berrangé
2023-03-03 3:30 ` Wookey
2023-03-03 5:50 ` Paul Eggert
2023-03-03 14:01 ` Wookey
2023-03-03 14:14 ` Daniel P. Berrangé
2023-03-03 23:21 ` Arsen Arsenović
2023-03-03 11:49 ` Florian Weimer
2023-03-03 12:39 ` Richard W.M. Jones
2023-03-02 8:30 ` Richard W.M. Jones
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