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Finding the unsigned and out-of-tree loaded kernel modules?

cn flag

I just tried the

cat /proc/sys/kernel/tainted

command and the return value is 12289.

0     1           A module with a non-GPL license has been loaded, this
                  includes modules with no license.
                  Set by modutils >= 2.4.9 and module-init-tools
12    4096        An out-of-tree module has been loaded                           
13    8192        An unsigned module has been loaded in a kernel supporting
                  module signature

My questions are:

  1. Is this normal?

  2. How can i find which modules are unsigned, and find their binary files in order to scan them with virustotal?

  3. What is an An out-of-tree module and how to find them and their corresponding binary files?

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