On Sat, Jun 9, 2018 at 5:26 PM Ian Zimmerman <i...@very.loosely.org> wrote: > > 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. > > -- > Please don't Cc: me privately on mailing lists and Usenet, > if you also post the followup to the list or newsgroup. > To reply privately _only_ on Usenet and on broken lists > which rewrite From, fetch the TXT record for no-use.mooo.com. >
I appreciate that this has been a frustrating experience for you, but when you get a change, could you please run 'readelf -h' on the module concerned and show the output below: readelf -h /path/to/module.ko ELF Header: Magic: Class: Machine: Size of this header: This will either confirm or refute my assumption about the ELF header being the wrong size and causing the 'Exec format error' message to be printed. Thanks.
