linux-kernel - [PATCH] selftests/mm: on-fault-limit: run test without root privileges otherwise skip

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Date: Thu,  1 Feb 2024 12:13:06 +0500
From: Muhammad Usama Anjum <usama.anjum@...labora.com>
To: Andrew Morton <akpm@...ux-foundation.org>,
	Shuah Khan <shuah@...nel.org>,
	Muhammad Usama Anjum <usama.anjum@...labora.com>
Cc: kernel@...labora.com,
	linux-mm@...ck.org,
	linux-kselftest@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] selftests/mm: on-fault-limit: run test without root privileges otherwise skip

The mmap() respects rlimit only for normal users. This test should be
run as normal user, without root privileges.

Fixes: b6221771d468 ("selftests/mm: run_vmtests: remove sudo and conform to tap")
Signed-off-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
---
 tools/testing/selftests/mm/on-fault-limit.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/mm/on-fault-limit.c b/tools/testing/selftests/mm/on-fault-limit.c
index 0ea98ffab3589..431c1277d83a1 100644
--- a/tools/testing/selftests/mm/on-fault-limit.c
+++ b/tools/testing/selftests/mm/on-fault-limit.c
@@ -21,7 +21,7 @@ static void test_limit(void)
 	map = mmap(NULL, 2 * lims.rlim_max, PROT_READ | PROT_WRITE,
 		   MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);
 
-	ksft_test_result(map == MAP_FAILED, "Failed mmap\n");
+	ksft_test_result(map == MAP_FAILED, "The map failed respecting mlock limits\n");
 
 	if (map != MAP_FAILED)
 		munmap(map, 2 * lims.rlim_max);
@@ -33,8 +33,8 @@ int main(int argc, char **argv)
 	ksft_print_header();
 	ksft_set_plan(1);
 
-	if (getuid())
-		ksft_test_result_skip("Require root privileges to run\n");
+	if (!getuid())
+		ksft_test_result_skip("The test must be run from a normal user\n");
 	else
 		test_limit();
 
-- 
2.42.0