Re: 6.18.14: VirtualBox modules don't build anymore; bisected

[Greg KH <gregkh@linuxfoundation.org>]

On Fri, Feb 27, 2026 at 04:33:34PM +0100, Rainer Fiebig wrote:
> In case this hasn't been reported already: with 6.18.14 the
> VirtualBox-7.1.16 modules won't build during the boot process, as they
> usually do.  Bisecting between 6.18.13/14 led to this:
> 
> f056c340b73962ebaffe93997b582bdf16dc6270 is the first bad commit
> commit f056c340b73962ebaffe93997b582bdf16dc6270 (HEAD)
> Author: Josh Poimboeuf <jpoimboe@kernel.org>
> Date:   Tue Feb 10 13:45:22 2026 -0800
> 
>     kbuild: Add objtool to top-level clean target
> 
>     [ Upstream commit 68b4fe32d73789dea23e356f468de67c8367ef8f ]
> 
>     Objtool is an integral part of the build, make sure it gets cleaned
>     by "make clean" and "make mrproper".
> [...]
> 
> 
> The script I use for building my kernels includes "make mrproper" before
> compiling and "make clean" after the kernel and modules have been
> installed.
> 
> Perhaps it would be more appropriate to report this to the
> VirtualBox-devs but I won't do that because the registration procedure
> asks for too many private data.

We obviously can not do anything about external modules, so if you rely
on these, you are going to have to work with them on this, sorry.

thanks,

greg k-h