kernel/tools/testing/selftests/net/netlink-dumps.c, branch linux-rolling-stable

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

2025-12-06T22:01:20Z

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

2025-11-27T22:24:31Z

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

selftest: net: prevent use of uninitialized variable

2025-10-25T01:43:37Z

Fix to avoid the usage of the `ret` variable uninitialized in the following macro expansions. It solves the following warning: In file included from netlink-dumps.c:21: netlink-dumps.c: In function ‘dump_extack’: ../kselftest_harness.h:788:35: warning: ‘ret’ may be used uninitialized [-Wmaybe-uninitialized] 788 | intmax_t __exp_print = (intmax_t)__exp; \ | ^~~~~~~~~~~ ../kselftest_harness.h:631:9: note: in expansion of macro ‘__EXPECT’ 631 | __EXPECT(expected, #expected, seen, #seen, ==, 0) | ^~~~~~~~ netlink-dumps.c:169:9: note: in expansion of macro ‘EXPECT_EQ’ 169 | EXPECT_EQ(ret, FOUND_EXTACK); | ^~~~~~~~~ The issue can be reproduced, building the tests, with the command: make -C tools/testing/selftests TARGETS=net Signed-off-by: Alessandro Zanni Link: https://patch.msgid.link/20251023205354.28249-1-alessandro.zanni87@gmail.com Signed-off-by: Jakub Kicinski

selftests: net: make the dump test less sensitive to mem accounting

2025-09-08T19:57:05Z

Recent changes to make netlink socket memory accounting must have broken the implicit assumption of the netlink-dump test that we can fit exactly 64 dumps into the socket. Handle the failure mode properly, and increase the dump count to 80 to make sure we still run into the error condition if the default buffer size increases in the future. Link: https://patch.msgid.link/20250906211351.3192412-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: test extacks in netlink dumps

2024-11-25T01:00:06Z

Test that extacks in dumps work. The test fills up the receive buffer to test both the inline dump (as part of sendmsg()) and delayed one (run during recvmsg()). Use YNL helpers to parse the messages. We need to add the test to YNL file to make sure the right include path are used. Reviewed-by: Jacob Keller Link: https://patch.msgid.link/20241119224432.1713040-2-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: netlink-dumps: validation checks

2024-11-19T02:42:44Z

The sanity checks are going to get silently cast to unsigned and always pass. Cast the sizeof to signed size. Reviewed-by: Simon Horman Link: https://patch.msgid.link/20241115003248.733862-1-kuba@kernel.org Signed-off-by: Jakub Kicinski

selftests: net: add a test for closing a netlink socket ith dump in progress

2024-11-07T21:45:34Z

Close a socket with dump in progress. We need a dump which generates enough info not to fit into a single skb. Policy dump fits the bill. Use the trick discovered by syzbot for keeping a ref on the socket longer than just close, with mqueue. TAP version 13 1..3 # Starting 3 tests from 1 test cases. # RUN global.test_sanity ... # OK global.test_sanity ok 1 global.test_sanity # RUN global.close_in_progress ... # OK global.close_in_progress ok 2 global.close_in_progress # RUN global.close_with_ref ... # OK global.close_with_ref ok 3 global.close_with_ref # PASSED: 3 / 3 tests passed. # Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0 Note that this test is not expected to fail but rather crash the kernel if we get the cleanup wrong. Reviewed-by: Kuniyuki Iwashima Link: https://patch.msgid.link/20241106015235.2458807-2-kuba@kernel.org Signed-off-by: Jakub Kicinski