GNU bug report logs - #46212
ci.guix.gnu.org narinfos with excessive NarSize

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Package: guix; Severity: important; Reported by: Christopher Baines <mail@HIDDEN>; dated Sun, 31 Jan 2021 14:48:02 UTC; Maintainer for guix is bug-guix@HIDDEN.

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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Christopher Baines <mail@HIDDEN>
Subject: Re: bug#46212: ci.guix.gnu.org narinfos with excessive NarSize
References: <87zh0pf9ip.fsf@HIDDEN> <87y2g9nneh.fsf@HIDDEN>
Date: Mon, 01 Feb 2021 10:15:56 +0100
In-Reply-To: <87y2g9nneh.fsf@HIDDEN> ("Ludovic =?utf-8?Q?Court=C3=A8s=22'?=
 =?utf-8?Q?s?= message of "Sun, 31 Jan 2021 16:20:38 +0100")
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Ludovic Court=C3=A8s <ludo@HIDDEN> skribis:

> The key point here is that =E2=80=98narSize=E2=80=99 in the database is n=
egative:

With commit 13a7d2a538b00aa0a8cf9b999f1a4ff3e5959af9, =E2=80=98register-ite=
ms=E2=80=99 &
co. will now detect invalid nar size values early on.

Ludo=E2=80=99.




Information forwarded to bug-guix@HIDDEN:
bug#46212; Package guix. Full text available.

Message received at 46212 <at> debbugs.gnu.org:


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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Christopher Baines <mail@HIDDEN>
Subject: Re: bug#46212: ci.guix.gnu.org narinfos with excessive NarSize
References: <87zh0pf9ip.fsf@HIDDEN>
Date: Sun, 31 Jan 2021 16:20:38 +0100
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 "Sun, 31 Jan 2021 14:47:42 +0000")
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Christopher Baines <mail@HIDDEN> skribis:

> /gnu/store/qln574djfgl8h9glij9id8jips7nnrlw-flightgear-2018.3.5
> NarSize: 18446744072099351584
>
> /gnu/store/qhix6afvy2a6n7hlx4qgdns461p8kdnv-repeat-masker-4.1.1
> NarSize: 18446744071612438544
>
> /gnu/store/wd9z64xpck56xzf52jwlpg8vb610b0ym-repeat-masker-4.1.1
> NarSize: 18446744071612438544

The key point here is that =E2=80=98narSize=E2=80=99 in the database is neg=
ative:

--8<---------------cut here---------------start------------->8---
sqlite> select * from validpaths where path =3D '/gnu/store/qhix6afvy2a6n7h=
lx4qgdns461p8kdnv-repeat-masker-4.1.1';
43262123|/gnu/store/qhix6afvy2a6n7hlx4qgdns461p8kdnv-repeat-masker-4.1.1|sh=
a256:33328e16d8d83dcf1a6e031598dbc517aff18e6c7ccd55f7894102bab55fcdb9|16118=
49907|/gnu/store/rr532q5fmwj1gafdgk6nhxg9khnbsw3z-repeat-masker-4.1.1.drv|-=
2097113072
--8<---------------cut here---------------end--------------->8---

The actual nar size in this case is just above 2=C2=B3=C2=B9 so most likely=
 we=E2=80=99re
seeing a signed integer wrapping error.

I believe this is a very recent regression (the registration data for
the item above is Jan. 28th); we have older store items with a correct
=E2=80=98narSize=E2=80=99, such as
<https://ci.guix.gnu.org/nm6w84c9zj3yiylal3dk1sqzxq11sjzw.narinfo>.

Thoughts?

Ludo=E2=80=99.




Information forwarded to bug-guix@HIDDEN:
bug#46212; Package guix. Full text available.
Severity set to 'important' from 'normal' Request was from Ludovic Courtès <ludo@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: Christopher Baines <mail@HIDDEN>
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Subject: ci.guix.gnu.org narinfos with excessive NarSize
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--=-=-=
Content-Type: text/plain

I noticed through the Guix Data Service that some narinfo files from
ci.guix.gnu.org have an excessive NarSize.

These are the three that I've found, but there could be more.


/gnu/store/qln574djfgl8h9glij9id8jips7nnrlw-flightgear-2018.3.5
NarSize: 18446744072099351584

/gnu/store/qhix6afvy2a6n7hlx4qgdns461p8kdnv-repeat-masker-4.1.1
NarSize: 18446744071612438544

/gnu/store/wd9z64xpck56xzf52jwlpg8vb610b0ym-repeat-masker-4.1.1
NarSize: 18446744071612438544


There's additional information on IRC: http://logs.guix.gnu.org/guix/2021-01-31.log#152751

Cc'ing Mathieu in case this is related to the new offloading mechanism.

--=-=-=
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--=-=-=--




Acknowledgement sent to Christopher Baines <mail@HIDDEN>:
New bug report received and forwarded. Copy sent to othacehe@HIDDEN, bug-guix@HIDDEN. Full text available.
Report forwarded to othacehe@HIDDEN, bug-guix@HIDDEN:
bug#46212; Package guix. Full text available.
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