6.6-stable review patch. If anyone has any objections, please let me know.
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From: Itaru Kitayama itaru.kitayama@linux.dev
[ Upstream commit 2ffc27b15b11c9584ac46335c2ed2248d2aa4137 ]
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@linux.dev Signed-off-by: Itaru Kitayama itaru.kitayama@linux.dev Cc: Shuah Khan shuah@kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org Stable-dep-of: 7c5e8d212d7d ("selftests: memfd_secret: don't build memfd_secret test on unsupported arches") Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/mm/run_vmtests.sh | 1 + 1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 3e2bc818d566f..7d31718ce8343 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -303,6 +303,7 @@ CATEGORY="hmm" run_test bash ./test_hmm.sh smoke # 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