September 2024 - Linux-kselftest-mirror

[PATCH v2 1/2] exec: add a flag for "reasonable" execveat() comm

by Tycho Andersen

From: Tycho Andersen <tandersen(a)netflix.com> Zbigniew mentioned at Linux Plumber's that systemd is interested in switching to execveat() for service execution, but can't, because the contents of /proc/pid/comm are the file descriptor which was used, instead of the path to the binary. This makes the output of tools like top and ps useless, especially in a world where most fds are opened CLOEXEC so the number is truly meaningless. Change exec path to fix up /proc/pid/comm in the case where we have allocated one of these synthetic paths in bprm_init(). This way the actual exec machinery is unchanged, but cosmetically the comm looks reasonable to admins investigating things. Signed-off-by: Tycho Andersen <tandersen(a)netflix.com> Suggested-by: Zbigniew Jędrzejewski-Szmek <zbyszek(a)in.waw.pl> CC: Aleksa Sarai <cyphar(a)cyphar.com> Link: https://github.com/uapi-group/kernel-features#set-comm-field-before-exec --- v2: * drop the flag, everyone :) * change the rendered value to f_path.dentry->d_name.name instead of argv[0], Eric --- fs/exec.c | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/fs/exec.c b/fs/exec.c index dad402d55681..9520359a8dcc 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -1416,7 +1416,18 @@ int begin_new_exec(struct linux_binprm * bprm) set_dumpable(current->mm, SUID_DUMP_USER); perf_event_exec(); - __set_task_comm(me, kbasename(bprm->filename), true); + + /* + * If fdpath was set, execveat() made up a path that will + * probably not be useful to admins running ps or similar. + * Let's fix it up to be something reasonable. + */ + if (bprm->fdpath) { + BUILD_BUG_ON(TASK_COMM_LEN > DNAME_INLINE_LEN); + __set_task_comm(me, bprm->file->f_path.dentry->d_name.name, true); + } else { + __set_task_comm(me, kbasename(bprm->filename), true); + } /* An exec changes our domain. We are no longer part of the thread group */ base-commit: baeb9a7d8b60b021d907127509c44507539c15e5 -- 2.34.1

1 year

3
3
0 0

[PATCH v2] kselftest: devices: Add test to detect missing devices

by Nícolas F. R. A. Prado

Introduce a new test to identify regressions causing devices to go missing on the system. For each bus and class on the system the test checks the number of devices present against a reference file, which needs to have been generated by the program at a previous point on a known-good kernel, and if there are missing devices they are reported. Signed-off-by: Nícolas F. R. A. Prado <nfraprado(a)collabora.com> --- Hi, For details about the test, please see the README.rst included in the patch. This v2 contains changes addressing feedback received on the RFCv1 series, during the session at plumbers [1] and a few other things I noticed along the way. [1] https://www.youtube.com/live/kcr8NXEbzcg?si=QWBvJAOjj7tg264o&t=11283 For the open questions I posted in v1, the v2 changelog below should make it clear what was decided. A few clarifications are needed though: * I've decided to leave driver probe out of this test to keep it simple and avoid potential false-positives * The reference file now includes the full kernel config as part of its metadata (Example at [2]). This is clunky but seems worth it for the purposes of reproducibility, and potentially (in the future) choosing the reference that best matches the running system [2] https://github.com/kernelci/platform-test-parameters/pull/3/files Let me know your thoughts. Thanks, Nícolas --- Changes in v2: - Switched reference format from YAML to JSON - Introduced metadata to reference file, it includes: kernel version, kernel configuration and platform identifier - Added -u flag to allow updating reference file in-place if it is a superset - Added -f flag to allow specifying filename of the reference - Added a few device properties (., device, firmware_node, driver) - Un-ignored devlink device class - Refactored code to improve legibility - Added README.rst with documentation - Renamed test from exist.py to test_dev_exist.py - Link to v1: https://lore.kernel.org/r/20240724-kselftest-dev-exist-v1-1-9bc21aa761b5@co… --- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/devices/exist/Makefile | 3 + tools/testing/selftests/devices/exist/README.rst | 146 +++++++++ .../selftests/devices/exist/test_dev_exist.py | 357 +++++++++++++++++++++ 4 files changed, 507 insertions(+) diff --git a/tools/testing/selftests/Makefile b/tools/testing/selftests/Makefile index b38199965f99..eacf4b062f01 100644 --- a/tools/testing/selftests/Makefile +++ b/tools/testing/selftests/Makefile @@ -15,6 +15,7 @@ TARGETS += cpufreq TARGETS += cpu-hotplug TARGETS += damon TARGETS += devices/error_logs +TARGETS += devices/exist TARGETS += devices/probe TARGETS += dmabuf-heaps TARGETS += drivers/dma-buf diff --git a/tools/testing/selftests/devices/exist/Makefile b/tools/testing/selftests/devices/exist/Makefile new file mode 100644 index 000000000000..df85f661aa99 --- /dev/null +++ b/tools/testing/selftests/devices/exist/Makefile @@ -0,0 +1,3 @@ +TEST_PROGS := test_dev_exist.py + +include ../../lib.mk diff --git a/tools/testing/selftests/devices/exist/README.rst b/tools/testing/selftests/devices/exist/README.rst new file mode 100644 index 000000000000..1599204e355d --- /dev/null +++ b/tools/testing/selftests/devices/exist/README.rst @@ -0,0 +1,146 @@ +.. SPDX-License-Identifier: GPL-2.0 +.. Copyright (c) 2024 Collabora Ltd + +========================== +Device existence kselftest +========================== + +This test verifies whether all devices still exist on the system when compared +to a reference run, allowing detection of regressions that cause devices to go +missing. + +TL;DR +===== + +Run ``./test_dev_exist.py -g``, then run ``./test_dev_exist.py``. + +Usage +===== + +The test program can be found as ``test_dev_exist.py`` in this directory. Run it +with the ``--help`` argument to get information for all available arguments. +Detailed usage follows below. + +Reference generation +-------------------- + +Before running the test, it is necessary to generate a reference. To do that, +run it with the ``--generate-reference`` argument. This will generate a JSON +file encoding all the devices available, per subsystem (class or bus), in the +running system, as well as metadata about the system (kernel version, +configuration and system identifiers). + +By default, the file will be saved in the current directory and named based on +the system identifier, but that can be changed through the use of the +``--reference-dir`` and ``--reference-file`` flags. + +Running the test +---------------- + +To run the test, simply execute it **without** the ``--generate-reference`` +argument. By default, once again, the test will look for the reference file in +the current directory and named as the system identifier, but that can be +changed through the ``--reference-dir`` and ``--reference-file`` flags. + +Reading the results +------------------- + +The test outputs in the KTAP format, with one result per subsystem. For each +failure the output shows the devices that were expected by the reference file, +the devices that were found in the running system, and a best-effort guess for +the devices that are missing in the system. For each device, its main properties +are printed out to help in identifying it. + +As an example, below is the snippet printed when one of the three devices in the +media bus went missing:: + + # Missing devices for subsystem 'media': 1 (Expected 3, found 2) + # ================= + # Devices expected: + # + # .: + # /sys/devices/pci0000:00/0000:00:14.0/usb3/3-8/3-8.3/3-8.3.2/3-8.3.2:1.0/media2 + # uevent: + # MAJOR=237 + # MINOR=2 + # DEVNAME=media2 + # + # .: + # /sys/devices/pci0000:00/0000:00:14.0/usb3/3-9/3-9:1.0/media0 + # uevent: + # MAJOR=237 + # MINOR=0 + # DEVNAME=media0 + # + # .: + # /sys/devices/pci0000:00/0000:00:14.0/usb3/3-9/3-9:1.2/media1 + # uevent: + # MAJOR=237 + # MINOR=1 + # DEVNAME=media1 + # + # ----------------- + # Devices found: + # + # .: + # /sys/devices/pci0000:00/0000:00:14.0/usb3/3-9/3-9:1.0/media0 + # uevent: + # MAJOR=237 + # MINOR=0 + # DEVNAME=media0 + # + # .: + # /sys/devices/pci0000:00/0000:00:14.0/usb3/3-9/3-9:1.2/media1 + # uevent: + # MAJOR=237 + # MINOR=1 + # DEVNAME=media1 + # + # ----------------- + # Devices missing (best guess): + # + # .: + # /sys/devices/pci0000:00/0000:00:14.0/usb3/3-8/3-8.3/3-8.3.2/3-8.3.2:1.0/media2 + # uevent: + # MAJOR=237 + # MINOR=2 + # DEVNAME=media2 + # + # ================= + not ok 67 bus.media + +Updating the reference +---------------------- + +As time goes on, new devices might be introduced in the system. To replace a +reference file with a more up-to-date one containing more devices, pass both +``--generate-reference`` and ``--update-reference`` arguments. The program will +refuse to replace the reference if the new one doesn't contain all the devices +in the old reference, as that is usually not desirable. + +Caveats +======= + +The test relies solely on the count of devices per subsystem to detect missing +devices. [#f1]_ That means that it is possible for the test to fail to detect a +missing device. + +For example, if the running system contains one extra device and one missing +device on the same subsystem compared to the reference, no test will fail since +the count is the same. To minimize the risk of this happening, it is recommended +to keep the reference file as up-to-date as possible. + +.. [#f1] The reason for this is that there aren't any device properties that are + used for every device and that are guaranteed to uniquely identify them and be + stable across kernel releases, so any attempt to match devices based on their + properties would lead to false-positives. + +Pre-existing reference files +============================ + +Due to the per-platform nature of the reference files, it is not viable to keep +them in-tree. + +To facilitate running the test, especially by CI systems, a collection of +pre-existing reference files is kept at +https://github.com/kernelci/platform-test-parameters. diff --git a/tools/testing/selftests/devices/exist/test_dev_exist.py b/tools/testing/selftests/devices/exist/test_dev_exist.py new file mode 100755 index 000000000000..58bff5ea99e7 --- /dev/null +++ b/tools/testing/selftests/devices/exist/test_dev_exist.py @@ -0,0 +1,357 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0 +# Copyright (c) 2024 Collabora Ltd + +import os +import sys +import argparse +import gzip +import json + +# Allow ksft module to be imported from different directory +this_dir = os.path.dirname(os.path.realpath(__file__)) +sys.path.append(os.path.join(this_dir, "../../kselftest/")) + +import ksft + + +def generate_ref_metadata(): + metadata = {} + + config_file = "/proc/config.gz" + if os.path.isfile(config_file): + with gzip.open(config_file, "r") as f: + config = str(f.read()) + metadata["config"] = config + + metadata["version"] = os.uname().release + + metadata["platform_ids"] = get_possible_ref_filenames() + + return metadata + + +def generate_dev_data(): + data = {} + + device_subsys_types = [ + { + "type": "class", + "base_dir": "/sys/class", + "add_path": "", + "ignored": [], + }, + { + "type": "bus", + "base_dir": "/sys/bus", + "add_path": "devices", + "ignored": [], + }, + ] + + properties = sorted( + [ + ".", + "uevent", + "name", + "device", + "firmware_node", + "driver", + "device/uevent", + "firmware_node/uevent", + ] + ) + + for dev_subsys_type in device_subsys_types: + subsystems = {} + for subsys_name in sorted(os.listdir(dev_subsys_type["base_dir"])): + if subsys_name in dev_subsys_type["ignored"]: + continue + + devs_path = os.path.join( + dev_subsys_type["base_dir"], subsys_name, dev_subsys_type["add_path"] + ) + # Filter out non-symlinks as they're not devices + dev_dirs = [dev for dev in os.scandir(devs_path) if dev.is_symlink()] + devs_data = [] + for dev_dir in dev_dirs: + dev_path = os.path.join(devs_path, dev_dir) + dev_data = {"info": {}} + for prop in properties: + prop_path = os.path.join(dev_path, prop) + if os.path.isfile(prop_path): + with open(prop_path) as f: + dev_data["info"][prop] = f.read() + elif os.path.isdir(prop_path): + dev_data["info"][prop] = os.path.realpath(prop_path) + devs_data.append(dev_data) + if len(dev_dirs): + subsystems[subsys_name] = { + "count": len(dev_dirs), + "devices": devs_data, + } + data[dev_subsys_type["type"]] = subsystems + + return data + + +def generate_reference(): + return {"metadata": generate_ref_metadata(), "data": generate_dev_data()} + + +def commented(s): + return s.replace("\n", "\n# ") + + +def indented(s, n): + return " " * n + s.replace("\n", "\n" + " " * n) + + +def stripped(s): + return s.strip("\n") + + +def devices_difference(dev1, dev2): + difference = 0 + + for prop in dev1["info"].keys(): + for l1, l2 in zip( + dev1["info"].get(prop, "").split("\n"), + dev2["info"].get(prop, "").split("\n"), + ): + if l1 != l2: + difference += 1 + return difference + + +def guess_missing_devices(cur_subsys_data, ref_subsys_data): + # Detect what devices on the current system are the most similar to devices + # on the reference one by one until the leftovers are the most dissimilar + # devices and therefore most likely the missing ones. + found_count = cur_subsys_data["count"] + expected_count = ref_subsys_data["count"] + missing_count = found_count - expected_count + + diffs = [] + for cur_d in cur_subsys_data["devices"]: + for ref_d in ref_subsys_data["devices"]: + diffs.append((devices_difference(cur_d, ref_d), cur_d, ref_d)) + + diffs.sort(key=lambda x: x[0]) + + assigned_ref_devs = [] + assigned_cur_devs = [] + for diff in diffs: + if len(assigned_ref_devs) >= expected_count - missing_count: + break + if diff[1] in assigned_cur_devs or diff[2] in assigned_ref_devs: + continue + assigned_cur_devs.append(diff[1]) + assigned_ref_devs.append(diff[2]) + + missing_devices = [] + for d in ref_subsys_data["devices"]: + if d not in assigned_ref_devs: + missing_devices.append(d) + + return missing_devices + + +def dump_devices_info(cur_subsys_data, ref_subsys_data): + def dump_device_info(dev): + for name, val in dev["info"].items(): + ksft.print_msg(indented(name + ":", 2)) + val = stripped(val) + if val: + ksft.print_msg(commented(indented(val, 4))) + ksft.print_msg("") + + ksft.print_msg("=================") + ksft.print_msg("Devices expected:") + ksft.print_msg("") + for d in ref_subsys_data["devices"]: + dump_device_info(d) + ksft.print_msg("-----------------") + ksft.print_msg("Devices found:") + ksft.print_msg("") + for d in cur_subsys_data["devices"]: + dump_device_info(d) + ksft.print_msg("-----------------") + ksft.print_msg("Devices missing (best guess):") + ksft.print_msg("") + missing_devices = guess_missing_devices(cur_subsys_data, ref_subsys_data) + for d in missing_devices: + dump_device_info(d) + ksft.print_msg("=================") + + +def load_reference(ref_filename): + with open(ref_filename) as f: + ref = json.load(f) + return ref + + +def run_test(ref_filename): + ksft.print_msg(f"Using reference file: '{ref_filename}'") + + ref_data = load_reference(ref_filename)["data"] + + num_tests = 0 + for subsys_type in ref_data.values(): + num_tests += len(subsys_type) + ksft.set_plan(num_tests) + + cur_data = generate_dev_data() + + reference_outdated = False + + for subsys_type_name, ref_subsys_type_data in ref_data.items(): + for subsys_name, ref_subsys_data in ref_subsys_type_data.items(): + test_name = f"{subsys_type_name}.{subsys_name}" + if not ( + cur_data.get(subsys_type_name) + and cur_data.get(subsys_type_name).get(subsys_name) + ): + ksft.print_msg(f"Device subsystem '{subsys_name}' missing") + ksft.test_result_fail(test_name) + continue + cur_subsys_data = cur_data[subsys_type_name][subsys_name] + + found_count = cur_subsys_data["count"] + expected_count = ref_subsys_data["count"] + if found_count < expected_count: + ksft.print_msg( + f"Missing devices for subsystem '{subsys_name}': {expected_count - found_count} (Expected {expected_count}, found {found_count})" + ) + dump_devices_info(cur_subsys_data, ref_subsys_data) + ksft.test_result_fail(test_name) + else: + ksft.test_result_pass(test_name) + if found_count > expected_count: + reference_outdated = True + + if len(cur_data[subsys_type_name]) > len(ref_subsys_type_data): + reference_outdated = True + + if reference_outdated: + ksft.print_msg( + "Warning: The current system contains more devices and/or subsystems than the reference. Updating the reference is recommended." + ) + + +def ref_is_superset(new_ref_data, old_ref_data): + for subsys_type in old_ref_data: + for subsys in old_ref_data[subsys_type]: + if subsys not in new_ref_data[subsys_type]: + return False + if ( + new_ref_data[subsys_type][subsys]["count"] + < old_ref_data[subsys_type][subsys]["count"] + ): + return False + return True + + +def get_possible_ref_filenames(): + filenames = [] + + dt_board_compatible_file = "/proc/device-tree/compatible" + if os.path.exists(dt_board_compatible_file): + with open(dt_board_compatible_file) as f: + for line in f: + compatibles = [compat for compat in line.split("\0") if compat] + filenames.extend(compatibles) + else: + dmi_id_dir = "/sys/devices/virtual/dmi/id" + vendor_dmi_file = os.path.join(dmi_id_dir, "sys_vendor") + product_dmi_file = os.path.join(dmi_id_dir, "product_name") + + with open(vendor_dmi_file) as f: + vendor = f.read().replace("\n", "") + with open(product_dmi_file) as f: + product = f.read().replace("\n", "") + + filenames = [vendor + "," + product] + + return filenames + + +def get_ref_filename(ref_dir, should_exist=True): + chosen_ref_filename = "" + full_ref_paths = [ + os.path.join(ref_dir, f + ".json") for f in get_possible_ref_filenames() + ] + if not should_exist: + return full_ref_paths[0] + + for path in full_ref_paths: + if os.path.exists(path): + chosen_ref_filename = path + break + + if not chosen_ref_filename: + tried_paths = ",".join(["'" + p + "'" for p in full_ref_paths]) + ksft.print_msg(f"No matching reference file found (tried {tried_paths})") + ksft.exit_fail() + + return chosen_ref_filename + + +parser = argparse.ArgumentParser() +parser.add_argument( + "--reference-dir", + "-d", + default=".", + help="Directory containing the reference files", +) +parser.add_argument( + "--reference-file", "-f", help="File name of the reference to read from or write to" +) +parser.add_argument( + "--generate-reference", + "-g", + action="store_true", + help="Generate a reference file with the devices on the running system", +) +parser.add_argument( + "--update-reference", + "-u", + action="store_true", + help="Allow overwriting the reference in-place if the existing reference is a subset of the new one", +) +args = parser.parse_args() + +if args.reference_file: + ref_filename = os.path.join(args.reference_dir, args.reference_file) + if not os.path.exists(ref_filename) and not args.generate_reference: + ksft.print_msg(f"Reference file not found: '{ref_filename}'") + ksft.exit_fail() +else: + ref_filename = get_ref_filename(args.reference_dir, not args.generate_reference) + +if args.generate_reference: + if os.path.exists(ref_filename) and not args.update_reference: + print( + f"Reference file '{ref_filename}' already exists; won't overwrite; aborting" + ) + sys.exit(1) + + gen_ref = generate_reference() + if args.update_reference and os.path.exists(ref_filename): + loaded_ref = load_reference(ref_filename) + if not ref_is_superset(gen_ref["data"], loaded_ref["data"]): + print( + f"New reference is not a superset of the existing one; skipping update for '{ref_filename}'" + ) + sys.exit(1) + + with open(ref_filename, "w") as f: + json.dump(gen_ref, f, indent=4) + print(f"Reference generated to file '{ref_filename}'") + sys.exit(0) + +ksft.print_header() + +run_test(ref_filename) + +ksft.finished() --- base-commit: 40e0c9d414f57d450e3ad03c12765e797fc3fede change-id: 20240724-kselftest-dev-exist-bb1bcf884654 Best regards, -- Nícolas F. R. A. Prado <nfraprado(a)collabora.com>

1 year

1
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[PATCH bpf-next v6 0/8] libbpf, selftests/bpf: Support cross-endian usage

by Tony Ambardar

Hello all, This patch series targets a long-standing BPF usability issue - the lack of general cross-compilation support - by enabling cross-endian usage of libbpf and bpftool, as well as supporting cross-endian build targets for selftests/bpf. Benefits include improved BPF development and testing for embedded systems based on e.g. big-endian MIPS, more build options e.g for s390x systems, and better accessibility to the very latest test tools e.g. 'test_progs'. The series touches many functional areas: BTF.ext handling; object access, introspection, and linking; generation of normal and "light" skeletons. Initial development and testing used mips64, since this arch makes switching the build byte-order trivial and is thus very handy for A/B testing. However, it lacks some key features (bpf2bpf call, kfuncs, etc) making for poor selftests/bpf coverage. Final testing takes the kernel and selftests/bpf cross-built from x86_64 to s390x, and runs the result under QEMU/s390x. That same configuration could also be used on kernel-patches/bpf CI for regression testing endian support or perhaps load-sharing s390x builds across x86_64 systems. This thread includes some background regarding testing on QEMU/s390x and the generally favourable results: https://lore.kernel.org/bpf/ZsEcsaa3juxxQBUf@kodidev-ubuntu/ Earlier versions and related discussion of the series are here: v1: https://lore.kernel.org/bpf/cover.1724216108.git.tony.ambardar@gmail.com/ v2: https://lore.kernel.org/bpf/cover.1724313164.git.tony.ambardar@gmail.com/ v3: https://lore.kernel.org/bpf/cover.1724843049.git.tony.ambardar@gmail.com/ v4: https://lore.kernel.org/bpf/cover.1724976539.git.tony.ambardar@gmail.com/ v5: https://lore.kernel.org/bpf/cover.1725347944.git.tony.ambardar@gmail.com/ Feedback and suggestions are welcome! Best regards, Tony Changelog: --------- v5 -> v6: (comments from Andrii, Alexei, Eduard) - clarify info_blob_bswap() by making it explicitly conditional on non-native target endianness, and merge a pair of related debug statements - reformat debug statement in bpf_object_bswap_progs() on single line - update existing info setup functions to validate and parse info section metadata prior to any byte-swapping, and drop earlier added validation checks - rework cross-endian BTF.ext handling by using callback functions to byte-swap different types of info records, but after initial parsing - fix a bug always outputting BTF.ext raw data in native endianness - include v5 "Acked-by:" from Alexei, Yonghong v4 -> v5: (feedback from Andrii and Eduard) - add separate functions to byte-swap info metadata and records, and ensure ordering so record bswaps occur when metadata is native endian - use new and existing macros to iterate through info sections/records, and check embedded record sizes match that of info structs used - drop use of <cough> evil callbacks - move setting swapped_endian flag to after byte-swapping functions are called during initialization, allowing funcs to infer endianness and drop a 'bool native' call parameter - simplify byte-swapping macro used to generate light skeleton, and use internal lib funcs to swap info records instead of assuming all __u32 - change info bswap library funcs to void return - rework/consolidate new debug statements to reduce their number - remove some unneeded handling of impossible errors, and drop a safety check already handled elsewhere - add and clarify some comments v3 -> v4: - fix a use-after-free ELF data-handling error causing rare CI failures - move bswap functions for func/line/core-relo records to internal header - use bswap functions also for info blobs in light skeleton v2 -> v3: (feedback from Andrii) - improve some log and commit message formatting - restructure BTF.ext endianness safety checks and byte-swapping - use BTF.ext info record definitions for swapping, require BTF v1 - follow BTF API implementation more closely for BTF.ext - explicitly reject loading non-native endianness program into kernel - simplify linker output byte-order setting - drop redundant safety checks during linking - simplify endianness macro and improve blob setup code for light skel - no unexpected test failures after cross-compiling x86_64 -> s390x v1 -> v2: - fixed a light skeleton bug causing test_progs 'map_ptr' failure - simplified some BTF.ext related endianness logic - remove an 'inline' usage related to CI checkpatch failure - improve some formatting noted by checkpatch warnings - unexpected 'test_progs' failures drop 3 -> 2 (x86_64 to s390x cross) Tony Ambardar (8): libbpf: Improve log message formatting libbpf: Fix header comment typos for BTF.ext libbpf: Fix output .symtab byte-order during linking libbpf: Support BTF.ext loading and output in either endianness libbpf: Support opening bpf objects of either endianness libbpf: Support linking bpf objects of either endianness libbpf: Support creating light skeleton of either endianness selftests/bpf: Support cross-endian building tools/lib/bpf/bpf_gen_internal.h | 1 + tools/lib/bpf/btf.c | 284 +++++++++++++++++++++------ tools/lib/bpf/btf.h | 3 + tools/lib/bpf/btf_dump.c | 2 +- tools/lib/bpf/btf_relocate.c | 2 +- tools/lib/bpf/gen_loader.c | 187 +++++++++++++----- tools/lib/bpf/libbpf.c | 56 ++++-- tools/lib/bpf/libbpf.map | 2 + tools/lib/bpf/libbpf_internal.h | 45 ++++- tools/lib/bpf/linker.c | 80 ++++++-- tools/lib/bpf/relo_core.c | 2 +- tools/lib/bpf/skel_internal.h | 3 +- tools/testing/selftests/bpf/Makefile | 7 +- 13 files changed, 527 insertions(+), 147 deletions(-) -- 2.34.1

1 year

3
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kselftest/next kselftest-seccomp: 2 runs, 1 regressions (linux_kselftest-next-6.12-rc1-1-g4b721fcc094e)

by kernelci.org bot

kselftest/next kselftest-seccomp: 2 runs, 1 regressions (linux_kselftest-next-6.12-rc1-1-g4b721fcc094e) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/linux_kselftest-… Test: kselftest-seccomp Tree: kselftest Branch: next Describe: linux_kselftest-next-6.12-rc1-1-g4b721fcc094e URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 4b721fcc094e9eb6dd4702df8d79ab11e120833d Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/66f71c2a254fc0e2a4c8685e Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/linux_kselftest-next-6.12-rc1-… HTML log: https://storage.kernelci.org//kselftest/next/linux_kselftest-next-6.12-rc1-… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-seccomp.login: https://kernelci.org/test/case/id/66f71c2a254fc0e2a4c8685f failing since 59 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

1 year

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kselftest/next kselftest-lib: 2 runs, 1 regressions (linux_kselftest-next-6.12-rc1-1-g4b721fcc094e)

by kernelci.org bot

kselftest/next kselftest-lib: 2 runs, 1 regressions (linux_kselftest-next-6.12-rc1-1-g4b721fcc094e) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/linux_kselftest-… Test: kselftest-lib Tree: kselftest Branch: next Describe: linux_kselftest-next-6.12-rc1-1-g4b721fcc094e URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 4b721fcc094e9eb6dd4702df8d79ab11e120833d Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/66f71aaef3b0ef5235c8685f Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/linux_kselftest-next-6.12-rc1-… HTML log: https://storage.kernelci.org//kselftest/next/linux_kselftest-next-6.12-rc1-… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lib.login: https://kernelci.org/test/case/id/66f71aaef3b0ef5235c86860 failing since 59 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

1 year

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kselftest/next kselftest-lkdtm: 2 runs, 1 regressions (linux_kselftest-next-6.12-rc1-1-g4b721fcc094e)

by kernelci.org bot

kselftest/next kselftest-lkdtm: 2 runs, 1 regressions (linux_kselftest-next-6.12-rc1-1-g4b721fcc094e) Regressions Summary ------------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/job/kselftest/branch/next/kernel/linux_kselftest-… Test: kselftest-lkdtm Tree: kselftest Branch: next Describe: linux_kselftest-next-6.12-rc1-1-g4b721fcc094e URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git SHA: 4b721fcc094e9eb6dd4702df8d79ab11e120833d Test Regressions ---------------- platform | arch | lab | compiler | defconfig | regressions ----------------------------+------+-------------+----------+------------------------------+------------ stm32mp157a-dhcor-avenger96 | arm | lab-broonie | gcc-12 | multi_v7_defconfig+kselftest | 1 Details: https://kernelci.org/test/plan/id/66f7209fe5e957750ac8686a Results: 0 PASS, 1 FAIL, 0 SKIP Full config: multi_v7_defconfig+kselftest Compiler: gcc-12 (arm-linux-gnueabihf-gcc (Debian 12.2.0-14) 12.2.0) Plain log: https://storage.kernelci.org//kselftest/next/linux_kselftest-next-6.12-rc1-… HTML log: https://storage.kernelci.org//kselftest/next/linux_kselftest-next-6.12-rc1-… Rootfs: http://storage.kernelci.org/images/rootfs/debian/bookworm-kselftest/2024031… * kselftest-lkdtm.login: https://kernelci.org/test/case/id/66f7209fe5e957750ac8686b failing since 59 days (last pass: v6.10-rc7-29-gdf09b0bb09ea, first fail: v6.11-rc1)

1 year

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[PATCH -next] selftests/bpf: Use ARRAY_SIZE for array length

by Jiapeng Chong

Use of macro ARRAY_SIZE to calculate array size minimizes the redundant code and improves code reusability. ./tools/testing/selftests/bpf/prog_tests/core_reloc_raw.c:98:34-35: WARNING: Use ARRAY_SIZE. ./tools/testing/selftests/bpf/prog_tests/core_reloc_raw.c:93:29-30: WARNING: Use ARRAY_SIZE. ./tools/testing/selftests/bpf/prog_tests/core_reloc_raw.c:101:34-35: WARNING: Use ARRAY_SIZE. Reported-by: Abaci Robot <abaci(a)linux.alibaba.com> Closes: https://bugzilla.openanolis.cn/show_bug.cgi?id=11167 Signed-off-by: Jiapeng Chong <jiapeng.chong(a)linux.alibaba.com> --- tools/testing/selftests/bpf/prog_tests/core_reloc_raw.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tools/testing/selftests/bpf/prog_tests/core_reloc_raw.c b/tools/testing/selftests/bpf/prog_tests/core_reloc_raw.c index a18d3680fb16..5e576c6cecca 100644 --- a/tools/testing/selftests/bpf/prog_tests/core_reloc_raw.c +++ b/tools/testing/selftests/bpf/prog_tests/core_reloc_raw.c @@ -7,7 +7,7 @@ #include <sys/syscall.h> #include <bpf/libbpf.h> #include <bpf/btf.h> - +#include "kselftest.h" #include "test_progs.h" #include "test_btf.h" #include "bpf/libbpf_internal.h" @@ -90,15 +90,15 @@ static void test_bad_local_id(void) attr.prog_type = BPF_TRACE_RAW_TP; attr.license = (__u64)"GPL"; attr.insns = (__u64)&insns; - attr.insn_cnt = sizeof(insns) / sizeof(*insns); + attr.insn_cnt = ARRAY_SIZE(insns); attr.log_buf = (__u64)log; attr.log_size = sizeof(log); attr.log_level = log_level; attr.func_info = (__u64)funcs; - attr.func_info_cnt = sizeof(funcs) / sizeof(*funcs); + attr.func_info_cnt = ARRAY_SIZE(funcs); attr.func_info_rec_size = sizeof(*funcs); attr.core_relos = (__u64)relos; - attr.core_relo_cnt = sizeof(relos) / sizeof(*relos); + attr.core_relo_cnt = ARRAY_SIZE(relos); attr.core_relo_rec_size = sizeof(*relos); prog_fd = sys_bpf_prog_load(&attr, sizeof(attr), 1); saved_errno = errno; -- 2.32.0.3.g01195cf9f

1 year

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kselftest/next build: 7 builds: 2 failed, 5 passed, 1 warning (linux_kselftest-next-6.12-rc1-1-g4b721fcc094e)

by kernelci.org bot

kselftest/next build: 7 builds: 2 failed, 5 passed, 1 warning (linux_kselftest-next-6.12-rc1-1-g4b721fcc094e) Full Build Summary: https://kernelci.org/build/kselftest/branch/next/kernel/linux_kselftest-nex… Tree: kselftest Branch: next Git Describe: linux_kselftest-next-6.12-rc1-1-g4b721fcc094e Git Commit: 4b721fcc094e9eb6dd4702df8d79ab11e120833d Git URL: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git Built: 4 unique architectures Build Failures Detected: arm64: defconfig+kselftest+arm64-chromebook: (clang-16) FAIL defconfig+kselftest+arm64-chromebook: (gcc-12) FAIL Warnings Detected: arm64: arm: i386: x86_64: x86_64_defconfig+kselftest (clang-16): 1 warning Warnings summary: 1 vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x39: relocation to !ENDBR: .text+0x14ef94 ================================================================================ Detailed per-defconfig build reports: -------------------------------------------------------------------------------- defconfig+kselftest (arm64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, gcc-12) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- defconfig+kselftest+arm64-chromebook (arm64, clang-16) — FAIL, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- i386_defconfig+kselftest (i386, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- multi_v7_defconfig+kselftest (arm, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, gcc-12) — PASS, 0 errors, 0 warnings, 0 section mismatches -------------------------------------------------------------------------------- x86_64_defconfig+kselftest (x86_64, clang-16) — PASS, 0 errors, 1 warning, 0 section mismatches Warnings: vmlinux.o: warning: objtool: set_ftrace_ops_ro+0x39: relocation to !ENDBR: .text+0x14ef94 --- For more info write to <info(a)kernelci.org>

1 year

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[linus:master] [selftests] ecb8bd70d5: kernel-selftests.vDSO.vdso_standalone_test_x86.fail

by kernel test robot

Hello, kernel test robot noticed "kernel-selftests.vDSO.vdso_standalone_test_x86.fail" on: commit: ecb8bd70d51ccf9009219a6097cef293deada65b ("selftests: vDSO: build tests with O2 optimization") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master in testcase: kernel-selftests version: kernel-selftests-x86_64-977d51cf-1_20240508 with following parameters: group: group-03 compiler: gcc-12 test machine: 36 threads 1 sockets Intel(R) Core(TM) i9-10980XE CPU @ 3.00GHz (Cascade Lake) with 32G memory (please refer to attached dmesg/kmsg for entire log/backtrace) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <oliver.sang(a)intel.com> | Closes: https://lore.kernel.org/oe-lkp/202409241558.98e13f6f-oliver.sang@intel.com # timeout set to 300 # selftests: vDSO: vdso_standalone_test_x86 # Segmentation fault not ok 5 selftests: vDSO: vdso_standalone_test_x86 # exit=139 The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20240924/202409241558.98e13f6f-oliv… -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki

1 year

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[PATCH] selftests/mm: Fixed incorrect buffer->mirror size in hmm2 double_map test

by Donet Tom

The hmm2 double_map test was failing due to an incorrect buffer->mirror size. The buffer->mirror size was 6, while buffer->ptr size was 6 * PAGE_SIZE. The test failed because the kernel's copy_to_user function was attempting to copy a 6 * PAGE_SIZE buffer to buffer->mirror. Since the size of buffer->mirror was incorrect, copy_to_user failed. This patch corrects the buffer->mirror size to 6 * PAGE_SIZE. Test Result without this patch ============================== # RUN hmm2.hmm2_device_private.double_map ... # hmm-tests.c:1680:double_map:Expected ret (-14) == 0 (0) # double_map: Test terminated by assertion # FAIL hmm2.hmm2_device_private.double_map not ok 53 hmm2.hmm2_device_private.double_map Test Result with this patch =========================== # RUN hmm2.hmm2_device_private.double_map ... # OK hmm2.hmm2_device_private.double_map ok 53 hmm2.hmm2_device_private.double_map Signed-off-by: Donet Tom <donettom(a)linux.ibm.com> --- tools/testing/selftests/mm/hmm-tests.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/mm/hmm-tests.c b/tools/testing/selftests/mm/hmm-tests.c index d2cfc9b494a0..141bf63cbe05 100644 --- a/tools/testing/selftests/mm/hmm-tests.c +++ b/tools/testing/selftests/mm/hmm-tests.c @@ -1657,7 +1657,7 @@ TEST_F(hmm2, double_map) buffer->fd = -1; buffer->size = size; - buffer->mirror = malloc(npages); + buffer->mirror = malloc(size); ASSERT_NE(buffer->mirror, NULL); /* Reserve a range of addresses. */ -- 2.43.5

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