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When running the memfd_secret test run_vmtests.sh unconditionally tries to confgiure the YAMA LSM's ptrace_scope configuration, leading to an error if YAMA is not in the running kernel: # ./run_vmtests.sh: line 432: /proc/sys/kernel/yama/ptrace_scope: No such file or directory # # ---------------------- # # running ./memfd_secret # # ---------------------- Check that this file is present before trying to write to it. The indentation here is a bit odd, and it doesn't seem great that we configure but don't restore ptrace_scope. Link: https://lkml.kernel.org/r/20250610-selftest-mm-enable-yama-v1-1-0097b6713116@kernel.org Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org> Acked-by: David Hildenbrand <david@redhat.com> Cc: Shuah Khan <shuah@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>