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I try to install a module using this command: 

sudo insmod mymod.ko [arg1] [arg2]

but I get this error while loading the module: 

insmod: error inserting 'mymod.ko': -1 Invalid module format

my current kernel: 

uname -r
4.4.6-040406-generic

To compile the module for my linux kernel, I downloaded linux 4.4.6 since I couldn't find any source code for 4.4.6-040506-generic. This is the information about the module: 

modinfo mymod.ko
vermagic:       4.4.6 SMP mod_unload modversions

When I try to boot the kernel from the compiled source code, it fails to boot. It stuck with busybox and prompt initramfs.

Any suggestion?

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  • Can you include a little bit more information? For example, what command did you use to load the module? Commented Mar 31, 2016 at 23:29
  • I used "sudo insmod mymod.ko [arg1] [arg2] " Commented Mar 31, 2016 at 23:33
  • 1
    Great, could you edit your question to include that info? Commented Mar 31, 2016 at 23:35

1 Answer 1

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Run that insmod command, and after getting the error you mentioned of invalid module format, run dmesg and look at the last 4 lines. Usually it describes in such a case inconsistency between version of the module and version of the running kernel. If you have trouble understanding those lines, post them here.

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