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Bug#1070986: linux-source-6.7: Signing error building 6.7 custom kernel

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  Bug#1070986: linux-source-6.7: Signing error building 6.7 custom kernel Tom Overlund <tomov@dilacero.org> - 2024-05-12 17:00 +0200
    Bug#1070986: linux-source-6.7: Signing error building 6.7 custom kernel Tom Overlund <tomov@dilacero.org> - 2024-05-14 01:10 +0200
    Bug#1070986: This is a bug in debian scripts not upstream Tom Overlund <tomov@dilacero.org> - 2024-05-14 23:50 +0200

#82405 — Bug#1070986: linux-source-6.7: Signing error building 6.7 custom kernel

Package: linux-source-6.7
Version: 6.7.12-1
Severity: normal
X-Debbugs-Cc: tomov@dilacero.org

Dear Maintainer,

I'm following the directions at the Kernel Handbook, "4.2. Building a custom kernel from Debian kernel source".

I apt-get installed: linux-source libncurses-dev pahole

I configured with:
$ make localmodconfig

and took defaults to any prompts.

I then ran:
$ make menuconfig

and turned on:
Kernel hacking->Generic Kernel Debugging Instruments->KGDB: kernel debugger (KGDB=y)

And finally, ran:
$ make bindeb-pkg

The kernel compiled, but then failed with:
  ...
  HDRINST usr/include/asm/types.h
  INSTALL debian/linux-libc-dev/usr/include
  SIGN    debian/linux-image/lib/modules/6.7.12/kernel/arch/x86/crypto/aesni-intel.ko
At main.c:298:
- SSL error:FFFFFFFF80000002:system library::No such file or directory: ../crypto/bio/bss_file.c:67
- SSL error:10000080:BIO routines::no such file: ../crypto/bio/bss_file.c:75
sign-file: debian/linux-image/lib/modules/6.7.12/kernel/arch/x86/crypto/aesni-intel.ko
make[6]: *** [scripts/Makefile.modinst:137: debian/linux-image/lib/modules/6.7.12/kernel/arch/x86/crypto/aesni-intel.ko] Error 1
make[5]: *** [Makefile:1844: modules_install] Error 2
make[4]: *** [Makefile:2059: run-command] Error 2
make[3]: *** [debian/rules:17: binary-arch] Error 2
ESC[1mdpkg-buildpackage: ESC[0mESC[1;31merrorESC[0m: make -f debian/rules binary subprocess returned exit status 2
make[2]: *** [scripts/Makefile.package:144: bindeb-pkg] Error 2
make[1]: *** [/home/virt/linux-source-6.7/Makefile:1560: bindeb-pkg] Error 2
make: *** [Makefile:246: __sub-make] Error 2

I did some digging, and it looks like it's trying to double-sign the .ko files. For example, earlier in the make output, it says:

run-command KBUILD_RUN_COMMAND=+./scripts/package/builddeb
  SYMLINK debian/linux-image/lib/modules/6.7.12/build
  INSTALL debian/linux-image/lib/modules/6.7.12/modules.order
  INSTALL debian/linux-image/lib/modules/6.7.12/modules.builtin
  INSTALL debian/linux-image/lib/modules/6.7.12/modules.builtin.modinfo
  INSTALL debian/linux-image/lib/modules/6.7.12/kernel/arch/x86/crypto/aesni-intel.ko
  SIGN    debian/linux-image/lib/modules/6.7.12/kernel/arch/x86/crypto/aesni-intel.ko
  XZ      debian/linux-image/lib/modules/6.7.12/kernel/arch/x86/crypto/aesni-intel.ko.xz

And ls shows the .xz file is there:
$ ls debian/linux-image/lib/modules/6.7.12/kernel/arch/x86/crypto/aesni-intel*
debian/linux-image/lib/modules/6.7.12/kernel/arch/x86/crypto/aesni-intel.ko.xz

So then when it tries to sign the .ko file again, it can't find it, because it's been compressed to .xz.

-- System Information:
Debian Release: trixie/sid
  APT prefers unstable
  APT policy: (500, 'unstable')
Architecture: amd64 (x86_64)

Kernel: Linux 6.7.12-amd64 (SMP w/1 CPU thread; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages linux-source-6.7 depends on:
ii  binutils  2.42-4
ii  xz-utils  5.6.1+really5.4.5-1

Versions of packages linux-source-6.7 recommends:
ii  bc                1.07.1-4
ii  bison             2:3.8.2+dfsg-1+b1
ii  build-essential   12.10
ii  cpio              2.15+dfsg-1
ii  flex              2.6.4-8.2+b2
ii  kmod              32-1
ii  libelf-dev        0.191-1+b1
ii  libssl-dev        3.2.1-3
ii  linux-config-6.7  6.7.12-1
ii  rsync             3.3.0-1

Versions of packages linux-source-6.7 suggests:
ii  libncurses-dev [ncurses-dev]  6.4+20240414-1
ii  pkgconf [pkg-config]          1.8.1-1+b2
pn  qtbase5-dev                   <none>

-- no debconf information

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#82410

This works in the 6.8.9 upstream kernel. So I guess the good news is it wil be fixed in Debian eventually.

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#82413 — Bug#1070986: This is a bug in debian scripts not upstream

It's actually upstream. I ran the same:

  $ make bindeb-pkg

on the upstream source as I did on the Debian source, and yes, it gave me .deb packages.

Here's the repo for the upstream script that was part of the problem:

https://github.com/torvalds/linux/commits/master/scripts/package/builddeb

Note the recent changes.

I may be wrong, and it's a Debian patch that is causing the problem, but from what I've seen of the code it's 
probably upstream. I suppose I could download an upstream version of 6.7, and verify it has the same problem, 
but since nobody on the Debian maintainer side seems to care, I won't bother.

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