test_sysctl: add dedicated proc sysctl test driver
authorLuis R. Rodriguez <mcgrof@kernel.org>
Wed, 12 Jul 2017 21:33:43 +0000 (14:33 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Wed, 12 Jul 2017 23:26:00 +0000 (16:26 -0700)
commit9308f2f9e7f055cf3934645ec622bb5259dc1c14
tree6f7d2602a0290ffef6fb7834563f1d6b13e26196
parent61d9b56a89208d8cccd0b4cfec7e6959717e16e3
test_sysctl: add dedicated proc sysctl test driver

The existing tools/testing/selftests/sysctl/ tests include two test
cases, but these use existing production kernel sysctl interfaces.  We
want to expand test coverage but we can't just be looking for random
safe production values to poke at, that's just insane!

Instead just dedicate a test driver for debugging purposes and port the
existing scripts to use it.  This will make it easier for further tests
to be added.

Subsequent patches will extend our test coverage for sysctl.

The stress test driver uses a new license (GPL on Linux, copyleft-next
outside of Linux).  Linus was fine with this [0] and later due to Ted's
and Alans's request ironed out an "or" language clause to use [1] which
is already present upstream.

[0] https://lkml.kernel.org/r/CA+55aFyhxcvD+q7tp+-yrSFDKfR0mOHgyEAe=f_94aKLsOu0Og@mail.gmail.com
[1] https://lkml.kernel.org/r/1495234558.7848.122.camel@linux.intel.com

Link: http://lkml.kernel.org/r/20170630224431.17374-2-mcgrof@kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
lib/Kconfig.debug
lib/Makefile
lib/test_sysctl.c [new file with mode: 0644]
tools/testing/selftests/sysctl/config [new file with mode: 0644]
tools/testing/selftests/sysctl/run_numerictests
tools/testing/selftests/sysctl/run_stringtests