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kselftest: vm: check errnos in mdwe_test

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Invalid prctls return a negative code and set errno.  It's good practice
to check that errno is set as expected.

Link: https://lkml.kernel.org/r/20230828150858.393570-4-revest@chromium.org
Signed-off-by: Florent Revest <revest@chromium.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Cc: Alexey Izbyshev <izbyshev@ispras.ru>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Ayush Jain <ayush.jain3@amd.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Greg Thelen <gthelen@google.com>
Cc: Joey Gouly <joey.gouly@arm.com>
Cc: KP Singh <kpsingh@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Ryan Roberts <ryan.roberts@arm.com>
Cc: Szabolcs Nagy <Szabolcs.Nagy@arm.com>
Cc: Topi Miettinen <toiwoton@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Florent Revest 2023-08-28 17:08:55 +02:00 committed by Andrew Morton
parent a27e2e2d46
commit c93d05a729
1 changed files with 8 additions and 0 deletions
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8
tools/testing/selftests/mm/mdwe_test.c
View file

@ -23,14 +23,22 @@
TEST(prctl_flags)
{
EXPECT_LT(prctl(PR_SET_MDWE, 7L, 0L, 0L, 0L), 0);
EXPECT_EQ(errno, EINVAL);
EXPECT_LT(prctl(PR_SET_MDWE, 0L, 7L, 0L, 0L), 0);
EXPECT_EQ(errno, EINVAL);
EXPECT_LT(prctl(PR_SET_MDWE, 0L, 0L, 7L, 0L), 0);
EXPECT_EQ(errno, EINVAL);
EXPECT_LT(prctl(PR_SET_MDWE, 0L, 0L, 0L, 7L), 0);
EXPECT_EQ(errno, EINVAL);
EXPECT_LT(prctl(PR_GET_MDWE, 7L, 0L, 0L, 0L), 0);
EXPECT_EQ(errno, EINVAL);
EXPECT_LT(prctl(PR_GET_MDWE, 0L, 7L, 0L, 0L), 0);
EXPECT_EQ(errno, EINVAL);
EXPECT_LT(prctl(PR_GET_MDWE, 0L, 0L, 7L, 0L), 0);
EXPECT_EQ(errno, EINVAL);
EXPECT_LT(prctl(PR_GET_MDWE, 0L, 0L, 0L, 7L), 0);
EXPECT_EQ(errno, EINVAL);
}
FIXTURE(mdwe)