Re: [PATCH] Selftests/powerpc: Add a signal fuzzer selftest

On Thu, 2019-01-17 at 17:01:54 UTC, Breno Leitao wrote:

This is a new selftest that raises SIGUSR1 signals and handles it in a set
of different ways, trying to create different scenario for testing
purpose.

This test works raising a signal and calling sigreturn interleaved with
TM operations, as starting, suspending and terminating a transaction. The
test depends on random numbers, and, based on them, it sets different TM
states.

Other than that, the test fills out the user context struct that is passed
to the sigreturn system call with random data, in order to make sure that
the signal handler syscall can handle different and invalid states
properly.

This selftest has command line parameters to control what kind of tests the
user wants to run, as for example, if a transaction should be started prior
to signal being raised, or, after the signal being raised and before the
sigreturn. If no parameter is given, the default is enabling all options.

This test does not check if the user context is being read and set
properly by the kernel. Its purpose, at this time, is basically
guaranteeing that the kernel does not crash on invalid scenarios.

Signed-off-by: Breno Leitao <leitao@debian.org>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/83e367f9ad18d42a1883ee29f20608a2

cheers