[RFC PATCH 3/6] testing/pkeys: Add additional test for pkey_alloc()
From: <hidden>
Date: 2022-06-10 23:36:36
Also in:
linux-api, linux-kselftest, linux-mm, lkml
Subsystem:
kernel selftest framework, the rest · Maintainers:
Shuah Khan, Shuah Khan, Linus Torvalds
From: Ira Weiny <redacted> When pkeys are not available on the hardware pkey_alloc() has specific behavior which was previously untested. Add test for this. Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Aneesh Kumar K.V <redacted> Signed-off-by: Ira Weiny <redacted> --- tools/testing/selftests/vm/protection_keys.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c
index 43e47de19c0d..4b733a75606f 100644
--- a/tools/testing/selftests/vm/protection_keys.c
+++ b/tools/testing/selftests/vm/protection_keys.c@@ -1554,6 +1554,16 @@ void test_implicit_mprotect_exec_only_memory(int *ptr, u16 pkey) do_not_expect_pkey_fault("plain read on recently PROT_EXEC area"); } +void test_pkey_alloc_on_unsupported_cpu(void) +{ + int test_pkey = sys_pkey_alloc(0, 0); + + dprintf1("pkey_alloc: %d (%d %s)\n", test_pkey, errno, + strerror(errno)); + pkey_assert(test_pkey < 0); + pkey_assert(errno == ENOSPC); +} + void test_mprotect_pkey_on_unsupported_cpu(int *ptr, u16 pkey) { int size = PAGE_SIZE;
@@ -1688,6 +1698,8 @@ int main(int argc, char *argv[]) printf("running PKEY tests for unsupported CPU/OS\n"); + test_pkey_alloc_on_unsupported_cpu(); + ptr = mmap(NULL, size, PROT_NONE, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); assert(ptr != (void *)-1); test_mprotect_pkey_on_unsupported_cpu(ptr, 1);
--
2.35.1