GNU bug report logs - #75205
guix package test failure on i686-linux (kexec-load-file test)

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Package: guix; Severity: important; Reported by: Dariqq <dariqq@HIDDEN>; dated Mon, 30 Dec 2024 16:56:01 UTC; Maintainer for guix is bug-guix@HIDDEN.

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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Ian Eure <ian@HIDDEN>
Subject: Re: bug#75205: guix package test failure on i686-linux
 (kexec-load-file test)
In-Reply-To: <87v7uuphyg.fsf@HIDDEN> ("Ludovic =?utf-8?Q?Court=C3=A8s=22'?=
 =?utf-8?Q?s?= message of "Sat, 04 Jan 2025 19:11:35 +0100")
References: <87seq3uq0q.fsf@HIDDEN> <87v7uuphyg.fsf@HIDDEN>
Date: Mon, 06 Jan 2025 14:20:42 +0100
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See <https://issues.guix.gnu.org/75402>.




Information forwarded to bug-guix@HIDDEN:
bug#75205; 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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To: 75205 <at> debbugs.gnu.org
Subject: guix package test failure on i686-linux (kexec-load-file test)
Date: Sun, 05 Jan 2025 11:31:02 -0500
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Forwarding my reply from this other relevant thread[1]:

> Hi,
> It looks like some people[1,2] including myself are running into an issue where the `guix system reconfigure` command fails, presumably because `KEXEC_FILE_DEBUG` is not supported in older kernel configurations. 
>
> The output of reconfiguring my system is the same as Simen's[2] ending in:
>
> ```
> To complete the upgrade, run 'herd restart SERVICE' to stop,
> upgrade, and restart each service that was not automatically restarted.
> Run 'herd status' to view the list of services on your system.
> WARNING: (guile-user): imported module (guix build utils) overrides core binding `delete'
> guix system: error: kexec-load-file: Invalid argument
> ```
>
> My system runs a custom kernel configuration that I created via `make menuconfig` in the kernel repo. I suspect the issue lies here:
>
> ```
> (define (kexec-loading-program os)
>   "Return a program that calls 'kexec_file_load' to allow rebooting into OS
> via 'kexec'."
>   (let ((root-device (file-system-device
>                       (operating-system-root-file-system os))))
>     (program-file
>      "kexec-load-system.scm"
>      (with-imported-modules '((guix build syscalls))
>        #~(begin
>            (use-modules (guix build syscalls))

>            (let ((kernel (open-fdes #$(operating-system-kernel-file os)
>                                     O_RDONLY))
>                  (initrd (open-fdes #$(operating-system-initrd-file os)
>                                     O_RDONLY)))
>              (kexec-load-file kernel initrd
>                               (string-join
>                                (list #$@(operating-system-kernel-arguments
>                                          os root-device)))
>                               KEXEC_FILE_DEBUG)))))))
> ```
>
> This is the relevant snippet from my kernel configuration: 
>
> ```
> #
> # Kexec and crash features
> #
> CONFIG_CRASH_CORE=y
> CONFIG_KEXEC_CORE=y
> CONFIG_KEXEC=y
> CONFIG_KEXEC_FILE=y
> CONFIG_KEXEC_JUMP=y
> CONFIG_CRASH_DUMP=y
> CONFIG_CRASH_HOTPLUG=y
> CONFIG_CRASH_MAX_MEMORY_RANGES=8192
> # end of Kexec and crash features
> # end of General setup
> ```
>
> [1] https://issues.guix.gnu.org/75320
> [2] https://issues.guix.gnu.org/75211

[1] https://issues.guix.gnu.org/75027


-- 
Boogs




Information forwarded to bug-guix@HIDDEN:
bug#75205; Package guix. Full text available.

Message received at 75205 <at> debbugs.gnu.org:


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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Ian Eure <ian@HIDDEN>
Subject: Re: guix package test failure on i686-linux (kexec-load-file test)
In-Reply-To: <87seq3uq0q.fsf@HIDDEN> (Ian Eure's message of "Tue, 31 Dec
 2024 20:17:09 -0800")
References: <87seq3uq0q.fsf@HIDDEN>
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Hello,

Ian Eure <ian@HIDDEN> skribis:

> This is failing for me on aarch64-linux also:
>
>    test-name: kexec-load-file
>    location:
>    /tmp/guix-build-guix-1.4.0-31.121e96d.drv-0/source/tests/syscalls.scm:=
688
>    source:
>    + (test-equal
>    +   "kexec-load-file"
>    +   EPERM
>    +   (catch 'system-error
>    +          (lambda ()
>    +            (let ((fd1 (open-fdes "/dev/null" O_RDONLY))
>    +                  (fd2 (open-fdes "/dev/null" O_RDONLY)))
>    +              (kexec-load-file fd1 fd2 "gnu.repl=3Dyes")))
>    +          (lambda args (system-error-errno args))))
>    expected-value: 1
>    actual-value: 38
>    result: FAIL

Could you strace it, to see if strace decodes it are =E2=80=98kexec_file_lo=
ad=E2=80=99?
For example like this:

  ./pre-inst-env strace -e kexec_file_load \
    guile -c '(use-modules (guix build syscalls)) (kexec-load-file (open-fd=
es "/dev/null" O_RDONLY) (open-fdes "/dev/null" O_RDONLY) "")'

38 is ENOSYS (=E2=80=9CFunction not implemented=E2=80=9D), not ERANGE.  Thi=
s could mean
that kexec support is missing in this kernel.

Thanks,
Ludo=E2=80=99.




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From: Ian Eure <ian@HIDDEN>
To: 75205 <at> debbugs.gnu.org
Subject: Re: guix package test failure on i686-linux (kexec-load-file test)
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Date: Tue, 31 Dec 2024 20:17:09 -0800
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Cc: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
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This is failing for me on aarch64-linux also:

    test-name: kexec-load-file
    location:=20
    /tmp/guix-build-guix-1.4.0-31.121e96d.drv-0/source/tests/syscalls.scm:6=
88
    source:
    + (test-equal
    +   "kexec-load-file"
    +   EPERM
    +   (catch 'system-error
    +          (lambda ()
    +            (let ((fd1 (open-fdes "/dev/null" O_RDONLY))
    +                  (fd2 (open-fdes "/dev/null" O_RDONLY)))
    +              (kexec-load-file fd1 fd2 "gnu.repl=3Dyes")))
    +          (lambda args (system-error-errno args))))
    expected-value: 1
    actual-value: 38
    result: FAIL

If I downgrade to commit 96cd163c14e68c66c6a4cf0b18261fc454f8c1ba,=20
guix tests pass again -- the failing test was added in the next=20
commit.  I=E2=80=99m not sure what the issue here, it seems like that=20
syscall shouldn=E2=80=99t be arch-dependent, and the errnos in the=20
failures are unhelpful.  38 is ERANGE, 14 is EFAULT, neither of=20
those seem applicable here.  EPERM is 1, and 38 doesn=E2=80=99t have its=20
LSB set, so it can=E2=80=99t be a bitmask.

I=E2=80=99m encountering the issue using Guix as a foreign package manager=
=20
on top of Debian 12 "bookworm" in a VM.  Perhaps there=E2=80=99s an=20
implicit dependency on the host system=E2=80=99s kernel in the test, which=
=20
Debian=E2=80=99s fails to meet.

Ludo=E2=80=99, any thoughts?

  -- Ian




Information forwarded to bug-guix@HIDDEN:
bug#75205; Package guix. Full text available.

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Subject: guix package test failure on i686-linux (kexec-load-file test)
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Hello,

The guix package is failing the newly added kexec-load-file syscall test 
on i686-linux:

 From https://ci.guix.gnu.org/build/7774049/details:

test-name: kexec-load-file
location: 
/tmp/guix-build-guix-1.4.0-31.121e96d.drv-0/source/tests/syscalls.scm:688
source:
+ (test-equal
+   "kexec-load-file"
+   EPERM
+   (catch 'system-error
+          (lambda ()
+            (let ((fd1 (open-fdes "/dev/null" O_RDONLY))
+                  (fd2 (open-fdes "/dev/null" O_RDONLY)))
+              (kexec-load-file fd1 fd2 "gnu.repl=yes")))
+          (lambda args (system-error-errno args))))
expected-value: 1
actual-value: 14
result: FAIL






Acknowledgement sent to Dariqq <dariqq@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-guix@HIDDEN. Full text available.
Report forwarded to bug-guix@HIDDEN:
bug#75205; Package guix. Full text available.
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