Hi, This fifth series fixes _metadata reset and fixes the last patch to handle code set with direct calls to _exit(). As reported by Kernel Test Robot [1], some pidfd tests fail. This is due to the use of vfork() which introduced some side effects. Similarly, while making it more generic, a previous commit made some Landlock file system tests flaky, and subject to the host's file system mount configuration. This series fixes all these side effects by replacing vfork() with clone3() and CLONE_VFORK, which is cleaner (no arbitrary shared memory) and makes the Kselftest framework more robust. I tried different approaches and I found this one to be the cleaner and less invasive for current test cases. I successfully ran the following tests (using TEST_F and fork/clone/clone3, and KVM_ONE_VCPU_TEST) with this series: - kvm:fix_hypercall_test - kvm:sync_regs_test - kvm:userspace_msr_exit_test - kvm:vmx_pmu_caps_test - landlock:fs_test - landlock:net_test - landlock:ptrace_test - move_mount_set_group:move_mount_set_group_test - net/af_unix:scm_pidfd - perf_events:remove_on_exec - pidfd:pidfd_getfd_test - pidfd:pidfd_setns_test - seccomp:seccomp_bpf - user_events:abi_test [1] https://lore.kernel.org/oe-lkp/202403291015.1fcfa957-oliver.sang@xxxxxxxxx Previous versions: v1: https://lore.kernel.org/r/20240426172252.1862930-1-mic@xxxxxxxxxxx v2: https://lore.kernel.org/r/20240429130931.2394118-1-mic@xxxxxxxxxxx v3: https://lore.kernel.org/r/20240429191911.2552580-1-mic@xxxxxxxxxxx v4: https://lore.kernel.org/r/20240502210926.145539-1-mic@xxxxxxxxxxx Regards, Mickaël Salaün (10): selftests/pidfd: Fix config for pidfd_setns_test selftests/landlock: Fix FS tests when run on a private mount point selftests/harness: Fix fixture teardown selftests/harness: Fix interleaved scheduling leading to race conditions selftests/landlock: Do not allocate memory in fixture data selftests/harness: Constify fixture variants selftests/pidfd: Fix wrong expectation selftests/harness: Share _metadata between forked processes selftests/harness: Fix vfork() side effects selftests/harness: Handle TEST_F()'s explicit exit codes tools/testing/selftests/kselftest_harness.h | 122 +++++++++++++----- tools/testing/selftests/landlock/fs_test.c | 83 +++++++----- tools/testing/selftests/pidfd/config | 2 + .../selftests/pidfd/pidfd_setns_test.c | 2 +- 4 files changed, 143 insertions(+), 66 deletions(-) base-commit: e67572cd2204894179d89bd7b984072f19313b03 -- 2.45.0
