Re: Linux 6.1.165

[Peter Schneider]

Hi Sasha,


Am 04.03.2026 um 14:15 schrieb Sasha Levin:
> I'm announcing the release of the 6.1.165 kernel.
>
> All users of the 6.1 kernel series must upgrade.
>
> The updated 6.1.y git tree can be found at:
>          git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-6.1.y
> and can be browsed at the normal kernel.org git web browser:
>          https://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=summary
>
>
> Thanks,
> Sasha


In the now released 6.1.165, I get the same build error as I have reported in the 1st incarnation of 6.1.165-rc2 (see [1])

  CC      arch/x86/kernel/setup.o
arch/x86/kernel/setup.c: In function ‘ima_get_kexec_buffer’:
arch/x86/kernel/setup.c:385:15: error: implicit declaration of function ‘ima_validate_range’ 
[-Wimplicit-function-declaration]
  385 |         ret = ima_validate_range(ima_kexec_buffer_phys, ima_kexec_buffer_size);
      |               ^~~~~~~~~~~~~~~~~~
make[3]: *** [scripts/Makefile.build:250: arch/x86/kernel/setup.o] Fehler 1
make[2]: *** [scripts/Makefile.build:503: arch/x86/kernel] Fehler 2
make[1]: *** [scripts/Makefile.build:503: arch/x86] Fehler 2
make: *** [Makefile:2025: .] Fehler 2
root@linus:/usr/src/linux-stable# git status
HEAD losgelöst bei v6.1.165


So the offending patch seems to be still in, although in the 2nd incarnation of -rc2 which you force pushed over the 1st 
one of -rc2, it was then reverted after my report [2]. When i git blame arch/x86/kernel/setup.c and look at the 
offending line I see:

37f18915a261a arch/x86/kernel/setup.c    (Harshit Mogalapalli           2025-12-30 22:16:09 -0800  385)         ret = 
ima_validate_range(ima_kexec_buffer_phys, ima_kexec_buffer_size);
37f18915a261a arch/x86/kernel/setup.c    (Harshit Mogalapalli           2025-12-30 22:16:09 -0800  386)         if (ret)
37f18915a261a arch/x86/kernel/setup.c    (Harshit Mogalapalli           2025-12-30 22:16:09 -0800  387) 
return ret;
37f18915a261a arch/x86/kernel/setup.c    (Harshit Mogalapalli           2025-12-30 22:16:09 -0800  388)


which is this, now with a different commit SHA1: ( in [1] I found it was 73b97ee06bd635433d1c429ecdbc9167da5de588 )


commit 37f18915a261afe84dab462624ed829cddb77a9b
Author: Harshit Mogalapalli <harshit.m.mogalapalli@xxxxxxxxxx>
Date:   Tue Dec 30 22:16:09 2025 -0800

    x86/kexec: add a sanity check on previous kernel's ima kexec buffer

    [ Upstream commit c5489d04337b47e93c0623e8145fcba3f5739efd ]

    When the second-stage kernel is booted via kexec with a limiting command
    line such as "mem=<size>", the physical range that contains the carried
    over IMA measurement list may fall outside the truncated RAM leading to a
    kernel panic.


So, somehow this has come back between the new -rc2 and the release?!? But how and why? Did you retest this before the 
release?


Not good...


[1] https://lore.kernel.org/stable/66461c13-1bb3-473c-b57f-adba9db4f756@xxxxxxxxxxxxxx/
[2] https://lore.kernel.org/stable/a04b1aa6-ba46-4368-9dfe-6320a2dafa79@xxxxxxxxxxxxxx/

Beste Grüße,
Peter Schneider

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