The patch titled
Subject: tools/testing/selftests/mm/run_vmtests.sh: lower the ptrace permissions
has been added to the -mm mm-nonmm-unstable branch. Its filename is
lower-the-ptrace-permissions-so-that-the-memfd_secrect-test-program-runs-without-an-issue.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/lower-the-ptrace-permissions-so-that-the-memfd_secrect-test-program-runs-without-an-issue.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Itaru Kitayama <itaru.kitayama@xxxxxxxxx>
Subject: tools/testing/selftests/mm/run_vmtests.sh: lower the ptrace permissions
Date: Mon, 30 Oct 2023 17:54:45 +0900
On Ubuntu and probably other distros, ptrace permissions are tightend a
bit by default; i.e., /proc/sys/kernel/yama/ptrace_score is set to 1.
This cases memfd_secret's ptrace attach test fails with a permission
error. Set it to 0 piror to running the program.
Link: https://lkml.kernel.org/r/20231030-selftest-v1-1-743df68bb996@xxxxxxxxx
Signed-off-by: Itaru Kitayama <itaru.kitayama@xxxxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/mm/run_vmtests.sh | 1 +
1 file changed, 1 insertion(+)
--- a/tools/testing/selftests/mm/run_vmtests.sh~lower-the-ptrace-permissions-so-that-the-memfd_secrect-test-program-runs-without-an-issue
+++ a/tools/testing/selftests/mm/run_vmtests.sh
@@ -309,6 +309,7 @@ CATEGORY="hmm" run_test bash ./test_hmm.
# MADV_POPULATE_READ and MADV_POPULATE_WRITE tests
CATEGORY="madv_populate" run_test ./madv_populate
+echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
CATEGORY="memfd_secret" run_test ./memfd_secret
# KSM KSM_MERGE_TIME_HUGE_PAGES test with size of 100
_
Patches currently in -mm which might be from itaru.kitayama@xxxxxxxxx are
lower-the-ptrace-permissions-so-that-the-memfd_secrect-test-program-runs-without-an-issue.patch
