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kunit.py will attempt to catch SIGINT / ^C in order to ensure the TTY isn't messed up, but never actually attempts to terminate the running kernel (be it UML or QEMU). This can lead to a bit of frustration if the kernel has crashed or hung. Terminate the kernel process in the signal handler, if it's running. This requires plumbing through the process handle in a few more places (and having some checks to see if the kernel is still running in places where it may have already been killed). Reported-by: Andy Shevchenko <andriy.shevchenko@intel.com> Closes: https://lore.kernel.org/all/aaFmiAmg9S18EANA@smile.fi.intel.com/ Signed-off-by: David Gow <david@davidgow.net> Reviewed-by: Andy Shevchenko <andriy.shevchenko@intel.com> Tested-by: Andy Shevchenko <andriy.shevchenko@intel.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>