%guile-static-stripped crashes with a sigsegv (i.e. the guile used in the initrd (?))

root symptom:

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i think this is the guile binary that is used in initrd. it's been a while i noted this bug. but if it's so, then if error happens early in the boot, then it just dies with a sigsegv; i.e. it's a major hindrance to debuggability.

reproducer:

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guix shell -e '(begin (use-modules (gnu packages make-bootstrap)) %guile-static-stripped)'

and then start guile. or alternatively:

guile -c '(use-modules (ice-9 readline))'

analysis:

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make-guile-static-stripped calls (remove-store-references guile2) without checking the return code.

if i remove that call, then building fails with: "... is not allowed to refer to path `/gnu/store/3zl03prdg07ax4dny78hrzykillr6vcy-glibc-2.35'"

i.e. there's some reference in the binary to glibc, which is corrupted by remove-store-references.

i'm not sure this is the cause, but i suspect.

note that the `guile --version` test in make-guile-static-stripped runs fine; i.e. it's an insufficient test.

--

• attila lendvai

• PGP: 963F 5D5F 45C7 DFCD 0A39

--

“How much truth can a spirit bear, how much truth can a spirit dare? […] that became for me more and more the real measure of value.”

— Friedrich Nietzsche (1844–1900)

the reproducer still crashes on a recent x86_64, but i originally noticed this long ago (maybe a year even). back then i investigated an early crash in the boot, and i reached %GUILE-STATIC-STRIPPED, and made a TODO note to further investigate. then i forgot most of what happened, and recently i opened this bug report based on my note.

since then EXPRESSION->INITRD may have changed, because it now uses %GUILE-STATIC-INITRD, but it's created with the same MAKE-GUILE-STATIC-STRIPPED that produces the faulty %GUILE-STATIC-STRIPPED, so they're essentially the same.

in short: the reproducer crashes both %GUILE-STATIC-STRIPPED and %GUILE-STATIC-INITRD on x86_64, and i believe that it crashes the same way in the early phase of the boot when/if it tries to enter the debugger.

--

• attila lendvai

• PGP: 963F 5D5F 45C7 DFCD 0A39

--

“If instead of teaching other people what government should be and should do, you'd teach yourself what government actually is and does do, you'd be a libertarian.”

— François-René Rideau

May 26, 2024 at 11:26 AM, "Attila Lendvai" <attila@lendvai.name> wrote:

If it's that easy, to crash guile, then I'll try it on my T400. I'll resond if a few

if it crashes for me.

Hi,

Attila Lendvai <attila@lendvai.name> skribis:

Indeed:

It’s hard to see exactly where it segfaults, but it’s not surprising:

it’s built with a different libc than the ‘guile-readline’ package I’ve

installed, and it’s not capable of dlopening things. That’s a

restriction we have to be aware of, but that’s ok.

Thanks,

Ludo’.

tags 71211 notabug

close 71211

quit