androidlinuxinsmod

android insmod init_module failed (required key not available)

can some one help me?

I have run imsmod like this:

$ insmod /data/mm/mmdev.ko epoll_rate=100

but I got an error:

insmod: init_module failed (required key not available)

I googled it a lot, but there is no a perfect answer.

Thanks in advance.

Solution

  • I think this is because mmdev.ko module is signed.
    You can check if module is signed or not using command
    readelf -S mmdev.ko | grep module_sig

    If it is signed, try to remove module signature using following commands
    1. objcopy -R .note.module_sig mmdev.ko OR
    objcopy -R .module_sig mmdev.ko
    2. Check again output of : readelf -S mmdev.ko | grep module_sig
    3. Now check with command: # insmod /data/mm/mmdev.ko epoll_rate=100