Re: [PATCH] Kernel: Block non-UID-0 profiling completely

[Michael Tremer <michael.tremer@ipfire.org>]

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Hello,

> On 4 Feb 2022, at 13:45, Peter Müller <peter.mueller(a)ipfire.org> wrote:
> 
> Hello Michael,
> 
> [...]
> 
>>>> #lib/modules/KVER-ipfire/build/include/linux/perf_event.h
>>>> +#lib/modules/KVER-ipfire/build/include/linux/perf_event.h.orig
>>> 
>>> We should not install any files like this.
>> 
>> Hm. I wonder where it came from. Perhaps I forgot a "./make.sh clean" after the first attempt.
>> 
>> Will check and report back.
> 
> after running a clean build, this file stays present. It's attached to this mail.
> 
> It is odd to see this happening, as the additional "patch" command introduced by this
> patch does not differ from those already present in the kernel's LFS file, except for
> the patch file itself.

If the patch doesn’t match exactly, patch will create backup files so that you can fix anything manually if things broke.

What you can do is either to rediff the patch that it applies cleanly, or you can use this option:

       --no-backup-if-mismatch

          Do not back up a file if the patch does not match the file
          exactly and if backups are not otherwise requested.  This is
          the default if patch  is conforming to POSIX.

This should however be the default.

-Michael

> 
> Can you give me any hint on where to look next?
> 
> Thanks, and best regards,
> Peter Müller<perf_event.h.orig>