GNU bug report logs - #54723
'guix publish' without '--cache' can send garbled narinfo responses

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From: Guillaume Le Vaillant <glv <at> posteo.net>
To: Ludovic Courtès <ludo <at> gnu.org>
Cc: 54723 <at> debbugs.gnu.org
Subject: [bug#54723] [PATCH] Check URI when verifying narinfo validity.
Date: Tue, 05 Apr 2022 17:51:47 +0000

[Message part 1 (text/plain, inline)]

Ludovic Courtès <ludo <at> gnu.org> skribis:

> Hi,
>
> [...]
>
> Could you grab a narinfo and share it?
>
>   wget -qO - http://192.168.0.22:8080/HASH.narinfo
>
> where HASH is the hash part of a store item.
>
> What could happen though is a situation where ‘guix publish’ only offers
> a compression method not supported by the client.  In that case,
> ‘narinfo-best-uri’ throws a match-error because ‘choices’ is the empty
> list.  We should fix that.

I tried downloading a few narinfos and they don't look broken (2 of them
in attachment).

However for one of them it looks like the guix-publish server got stuck
on the request for several minutes (the second attempt worked):

--8<---------------cut here---------------start------------->8---
wget http://192.168.0.22:8080/184b50qkcrkchc6dpwwcd7ypqb5yvrm3.narinfo
--2022-04-05 19:33:56--  http://192.168.0.22:8080/184b50qkcrkchc6dpwwcd7ypqb5yvrm3.narinfo
Connexion à 192.168.0.22:8080… connecté.
requête HTTP transmise, en attente de la réponse… Erreur de lecture (Connexion ré-initialisée par le correspondant) dans les en-têtes.
Nouvel essai.

--2022-04-05 19:36:40--  (essai :  2)  http://192.168.0.22:8080/184b50qkcrkchc6dpwwcd7ypqb5yvrm3.narinfo
Connexion à 192.168.0.22:8080… connecté.
requête HTTP transmise, en attente de la réponse… 200 OK
Taille : 7428 (7,3K) [application/x-nix-narinfo]
Sauvegarde en : « 184b50qkcrkchc6dpwwcd7ypqb5yvrm3.narinfo »

184b50qkcrkchc6dpwwcd7ypqb5yvrm3.narinfo        100%[=====================================================================================================>]   7,25K  --.-KB/s    ds 0,02s   

2022-04-05 19:36:40 (391 KB/s) — « 184b50qkcrkchc6dpwwcd7ypqb5yvrm3.narinfo » sauvegardé [7428/7428]
--8<---------------cut here---------------end--------------->8---

Could that be the cause of the issue?

[ly615k3xjapk0wq7y2n4ld6msi7307ba.narinfo (application/octet-stream, attachment)]

[184b50qkcrkchc6dpwwcd7ypqb5yvrm3.narinfo (application/octet-stream, attachment)]

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