[gentoo-user] Re: Latest 4.9 kernels broken?

[Ian Zimmerman]

On 2018-06-09 14:15, Alexander Kapshuk wrote:

> I had a look at the source code for kmod-25. If I read it right, dmesg
> should have records along the lines of:
> kmod-25/libkmod/libkmod-module.c:886:           INFO(mod->ctx, "Failed
> to insert module '%s': %m\n", path);
>
> modprobe returns Exec format error.

> Now, if my understanding of the source code above is right, you either
> have CONFIG_X86_32 set in your kernel, e.i. your Elf_Ehdr is set to
> Elf32_Ehdr, or the module's header is for the architecture that is
> different from what is expected by the kernel.

The former is definitely false.  If the latter holds, it is not due to
any action on my part, but due to how the module is built by the kernel
build system (at the same time as the kernel proper).  Again, I strongly
suspect this is due to all the "objtool" churn in 4.9.106 and later.

I'm afraid I'm at the limit of my patience diving into this for now.
You see, I have to remove the broken kernel from grub manually every
time (and then re-add it for another test), otherwise it breaks
unattended boots.

Sorry about that.  Maybe in a few days I'll have time to sit down and
track it properly.

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