Non-zero if the kernel has been tainted. Numeric values, which can be ORed together:

• 1 - a module with a non-GPL license has been loaded, this includes modules with no license (set by modutils and module-init-tools)
• 2 - a module was force loaded by insmod -f (set by modutils and module-init-tools)
• 4 - unsafe SMP processors: SMP with CPUs not designed for SMP
• 8 - a module was force unloaded by rmmod -f (set by modutils and module-init-tools)
• 16 - a machine check exception has occurred
• 32 - system has hit bad_page