kernel/linux.git/tools/testing/selftests/pidfd, branch master

selftests: check pidfd_info->coredump_code correctness

2026-03-23T15:29:15+00:00

Extend the coredump_socket and coredump_socket_protocol selftests to verify that the field coredump_code is set as expected in struct pidfd_info. Signed-off-by: Emanuele Rocca Link: https://patch.msgid.link/acE6Eyuv2MM75pmk@NH27D9T0LF Signed-off-by: Christian Brauner

selftests/pidfd: add CLONE_PIDFD_AUTOKILL tests

2026-03-11T22:23:46+00:00

Add tests for CLONE_PIDFD_AUTOKILL: - autokill_basic: Verify closing the clone3 pidfd kills the child. - autokill_requires_pidfd: Verify AUTOKILL without CLONE_PIDFD fails. - autokill_requires_autoreap: Verify AUTOKILL without CLONE_AUTOREAP fails. - autokill_rejects_thread: Verify AUTOKILL with CLONE_THREAD fails. - autokill_pidfd_open_no_effect: Verify only the clone3 pidfd triggers autokill, not pidfd_open(). - autokill_requires_cap_sys_admin: Verify AUTOKILL without CLONE_NNP fails with -EPERM for an unprivileged caller. - autokill_without_nnp_with_cap: Verify AUTOKILL without CLONE_NNP succeeds with CAP_SYS_ADMIN. Link: https://patch.msgid.link/20260226-work-pidfs-autoreap-v5-6-d148b984a989@kernel.org Signed-off-by: Christian Brauner

selftests/pidfd: add CLONE_NNP tests

2026-03-11T22:23:31+00:00

Add tests for the new CLONE_NNP flag: - nnp_sets_no_new_privs: Verify a child created with CLONE_NNP has no_new_privs set while the parent does not. - nnp_rejects_thread: Verify CLONE_NNP | CLONE_THREAD is rejected with -EINVAL since threads share credentials. - autoreap_no_new_privs_unset: Verify a plain CLONE_AUTOREAP child does not get no_new_privs. Link: https://patch.msgid.link/20260226-work-pidfs-autoreap-v5-5-d148b984a989@kernel.org Signed-off-by: Christian Brauner

selftests/pidfd: add CLONE_AUTOREAP tests

2026-03-11T22:23:16+00:00

Add tests for the new CLONE_AUTOREAP clone3() flag: - autoreap_without_pidfd: CLONE_AUTOREAP without CLONE_PIDFD works (fire-and-forget) - autoreap_rejects_exit_signal: CLONE_AUTOREAP with non-zero exit_signal fails - autoreap_rejects_parent: CLONE_AUTOREAP with CLONE_PARENT fails - autoreap_rejects_thread: CLONE_AUTOREAP with CLONE_THREAD fails - autoreap_basic: child exits, pidfd poll works, PIDFD_GET_INFO returns correct exit code, waitpid() returns -ECHILD - autoreap_signaled: child killed by signal, exit info correct via pidfd - autoreap_reparent: autoreap grandchild reparented to subreaper still auto-reaps - autoreap_multithreaded: autoreap process with sub-threads auto-reaps after last thread exits - autoreap_no_inherit: grandchild forked without CLONE_AUTOREAP becomes a regular zombie Link: https://patch.msgid.link/20260226-work-pidfs-autoreap-v5-4-d148b984a989@kernel.org Signed-off-by: Christian Brauner

selftests/pidfd: fix typo in comment

2026-01-21T17:56:25+00:00

Fix the typo "untill" → "until" in a comment in pidfd_info_test.c. This typo is already listed in scripts/spelling.txt by commit 66b47b4a9dad ("checkpatch: look for common misspellings"). Link: https://lore.kernel.org/r/20260121094147.4187337-1-chenziyu@uniontech.com Suggested-by: Cryolitia PukNgae Signed-off-by: Ziyu Chen Signed-off-by: Shuah Khan

Merge tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-12-06T22:01:20+00:00

Pull non-MM updates from Andrew Morton: - "panic: sys_info: Refactor and fix a potential issue" (Andy Shevchenko) fixes a build issue and does some cleanup in ib/sys_info.c - "Implement mul_u64_u64_div_u64_roundup()" (David Laight) enhances the 64-bit math code on behalf of a PWM driver and beefs up the test module for these library functions - "scripts/gdb/symbols: make BPF debug info available to GDB" (Ilya Leoshkevich) makes BPF symbol names, sizes, and line numbers available to the GDB debugger - "Enable hung_task and lockup cases to dump system info on demand" (Feng Tang) adds a sysctl which can be used to cause additional info dumping when the hung-task and lockup detectors fire - "lib/base64: add generic encoder/decoder, migrate users" (Kuan-Wei Chiu) adds a general base64 encoder/decoder to lib/ and migrates several users away from their private implementations - "rbree: inline rb_first() and rb_last()" (Eric Dumazet) makes TCP a little faster - "liveupdate: Rework KHO for in-kernel users" (Pasha Tatashin) reworks the KEXEC Handover interfaces in preparation for Live Update Orchestrator (LUO), and possibly for other future clients - "kho: simplify state machine and enable dynamic updates" (Pasha Tatashin) increases the flexibility of KEXEC Handover. Also preparation for LUO - "Live Update Orchestrator" (Pasha Tatashin) is a major new feature targeted at cloud environments. Quoting the cover letter: This series introduces the Live Update Orchestrator, a kernel subsystem designed to facilitate live kernel updates using a kexec-based reboot. This capability is critical for cloud environments, allowing hypervisors to be updated with minimal downtime for running virtual machines. LUO achieves this by preserving the state of selected resources, such as memory, devices and their dependencies, across the kernel transition. As a key feature, this series includes support for preserving memfd file descriptors, which allows critical in-memory data, such as guest RAM or any other large memory region, to be maintained in RAM across the kexec reboot. Mike Rappaport merits a mention here, for his extensive review and testing work. - "kexec: reorganize kexec and kdump sysfs" (Sourabh Jain) moves the kexec and kdump sysfs entries from /sys/kernel/ to /sys/kernel/kexec/ and adds back-compatibility symlinks which can hopefully be removed one day - "kho: fixes for vmalloc restoration" (Mike Rapoport) fixes a BUG which was being hit during KHO restoration of vmalloc() regions * tag 'mm-nonmm-stable-2025-12-06-11-14' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (139 commits) calibrate: update header inclusion Reinstate "resource: avoid unnecessary lookups in find_next_iomem_res()" vmcoreinfo: track and log recoverable hardware errors kho: fix restoring of contiguous ranges of order-0 pages kho: kho_restore_vmalloc: fix initialization of pages array MAINTAINERS: TPM DEVICE DRIVER: update the W-tag init: replace simple_strtoul with kstrtoul to improve lpj_setup KHO: fix boot failure due to kmemleak access to non-PRESENT pages Documentation/ABI: new kexec and kdump sysfs interface Documentation/ABI: mark old kexec sysfs deprecated kexec: move sysfs entries to /sys/kernel/kexec test_kho: always print restore status kho: free chunks using free_page() instead of kfree() selftests/liveupdate: add kexec test for multiple and empty sessions selftests/liveupdate: add simple kexec-based selftest for LUO selftests/liveupdate: add userspace API selftests docs: add documentation for memfd preservation via LUO mm: memfd_luo: allow preserving memfd liveupdate: luo_file: add private argument to store runtime state mm: shmem: export some functions to internal.h ...

selftests: complete kselftest include centralization

2025-11-27T22:24:31+00:00

This follow-up patch completes centralization of kselftest.h and ksefltest_harness.h includes in remaining seltests files, replacing all relative paths with a non-relative paths using shared -I include path in lib.mk Tested with gcc-13.3 and clang-18.1, and cross-compiled successfully on riscv, arm64, x86_64 and powerpc arch. [reddybalavignesh9979@gmail.com: add selftests include path for kselftest.h] Link: https://lkml.kernel.org/r/20251017090201.317521-1-reddybalavignesh9979@gmail.com Link: https://lkml.kernel.org/r/20251016104409.68985-1-reddybalavignesh9979@gmail.com Signed-off-by: Bala-Vignesh-Reddy Suggested-by: Andrew Morton Link: https://lore.kernel.org/lkml/20250820143954.33d95635e504e94df01930d0@linux-foundation.org/ Reviewed-by: Wei Yang Cc: David Hildenbrand Cc: David S. Miller Cc: Eric Dumazet Cc: Günther Noack Cc: Jakub Kacinski Cc: Liam Howlett Cc: Lorenzo Stoakes Cc: Michal Hocko Cc: Mickael Salaun Cc: Ming Lei Cc: Paolo Abeni Cc: Shuah Khan Cc: Simon Horman Cc: Suren Baghdasaryan Cc: Vlastimil Babka Signed-off-by: Andrew Morton

selftests/pidfd: add second supported_mask test

2025-11-04T21:04:38+00:00

Verify that supported_mask is returned even when other fields are requested. Link: https://patch.msgid.link/20251028-work-coredump-signal-v1-11-ca449b7b7aa0@kernel.org Reviewed-by: Alexander Mikhalitsyn Signed-off-by: Christian Brauner

selftests/pidfd: add first supported_mask test

2025-11-04T21:04:36+00:00

Verify that when PIDFD_INFO_SUPPORTED_MASK is requested, the kernel returns the supported_mask field indicating which flags the kernel supports. Link: https://patch.msgid.link/20251028-work-coredump-signal-v1-10-ca449b7b7aa0@kernel.org Reviewed-by: Alexander Mikhalitsyn Signed-off-by: Christian Brauner

selftests/pidfd: update pidfd header

2025-11-04T21:04:32+00:00

Include the new defines and members. Link: https://patch.msgid.link/20251028-work-coredump-signal-v1-9-ca449b7b7aa0@kernel.org Reviewed-by: Alexander Mikhalitsyn Signed-off-by: Christian Brauner