March 2024 - Linux-kselftest-mirror

[PATCH v2 0/3] riscv: mm: Use hint address in mmap if available

by Charlie Jenkins

On riscv, mmap currently returns an address from the largest address space that can fit entirely inside of the hint address. This makes it such that the hint address is almost never returned. This patch raises the mappable area up to and including the hint address. This allows mmap to often return the hint address, which allows a performance improvement over searching for a valid address as well as making the behavior more similar to other architectures. Note that a previous patch introduced stronger semantics compared to other architectures for riscv mmap. On riscv, mmap will not use bits in the upper bits of the virtual address depending on the hint address. On other architectures, a random address is returned in the address space requested. On all architectures the hint address will be returned if it is available. This allows riscv applications to configure how many bits in the virtual address should be left empty. This has the two benefits of being able to request address spaces that are smaller than the default and doesn't require the application to know the page table layout of riscv. Signed-off-by: Charlie Jenkins <charlie(a)rivosinc.com> --- Changes in v2: - Add back forgotten "mmap_end = STACK_TOP_MAX" - Link to v1: https://lore.kernel.org/r/20240129-use_mmap_hint_address-v1-0-4c74da813ba1@… --- Charlie Jenkins (3): riscv: mm: Use hint address in mmap if available selftests: riscv: Generalize mm selftests docs: riscv: Define behavior of mmap Documentation/arch/riscv/vm-layout.rst | 16 ++-- arch/riscv/include/asm/processor.h | 22 +++--- tools/testing/selftests/riscv/mm/mmap_bottomup.c | 20 +---- tools/testing/selftests/riscv/mm/mmap_default.c | 20 +---- tools/testing/selftests/riscv/mm/mmap_test.h | 93 +++++++++++++----------- 5 files changed, 67 insertions(+), 104 deletions(-) --- base-commit: 556e2d17cae620d549c5474b1ece053430cd50bc change-id: 20240119-use_mmap_hint_address-f9f4b1b6f5f1 -- - Charlie

1 year, 2 months

3
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[RFC v3 0/3] move_phys_pages syscall - migrate page contents given

by Gregory Price

v3: - pull forward to v6.8 - style and small fixups recommended by jcameron - update syscall number (will do all archs when RFC tag drops) - update for new folio code - added OCP link to device-tracked address hotness proposal - kept void* over __u64 simply because it integrates cleanly with existing migration code. If there's strong opinions, I can refactor. This patch set is a proposal for a syscall analogous to move_pages, that migrates pages between NUMA nodes using physical addressing. The intent is to better enable user-land system-wide memory tiering as CXL devices begin to provide memory resources on the PCIe bus. For example, user-land software which is making decisions based on data sources which expose physical address information no longer must convert that information to virtual addressing to act upon it (see background for info on how physical addresses are acquired). The syscall requires CAP_SYS_ADMIN, since physical address source information is typically protected by the same (or CAP_SYS_NICE). This patch set broken into 3 patches: 1) refactor of existing migration code for code reuse 2) The sys_move_phys_pages system call. 3) ktest of the syscall The sys_move_phys_pages system call validates the page may be migrated by checking migratable-status of each vma mapping the page, and the intersection of cpuset policies each vma's task. Background: Userspace job schedulers, memory managers, and tiering software solutions depend on page migration syscalls to reallocate resources across NUMA nodes. Currently, these calls enable movement of memory associated with a specific PID. Moves can be requested in coarse, process-sized strokes (as with migrate_pages), and on specific virtual pages (via move_pages). However, a number of profiling mechanisms provide system-wide information that would benefit from a physical-addressing version move_pages. There are presently at least 4 ways userland can acquire physical address information for use with this interface, and 1 hardware offload mechanism being proposed by opencompute. 1) /proc/pid/pagemap: can be used to do page table translations. This is only really useful for testing, and the ktest was written using this functionality. 2) X86: IBS (AMD) and PEBS (Intel) can be configured to return physical and/or vitual address information. 3) zoneinfo: /proc/zoneinfo exposes the start PFN of zones 4) /sys/kernel/mm/page_idle: A way to query whether a PFN is idle. So long as the page size is known, this can be used to identify system-wide idle pages that could be migrated to lower tiers. https://docs.kernel.org/admin-guide/mm/idle_page_tracking.html 5) CXL Offloaded Hotness Monitoring (Proposed): a CXL memory device may provide hot/cold information about its memory. For example, it may report the hottest device addresses (0-based) or a physical address (if it has access to decoders for convert bases). DPA can be cheaply converted to HPA by combining it with data exposed by /sys/bus/cxl/ information (region address bases). See: https://www.opencompute.org/documents/ocp-cms-hotness-tracking-requirements… Information from these sources facilitates systemwide resource management, but with the limitations of migrate_pages and move_pages applying to individual tasks, their outputs must be converted back to virtual addresses and re-associated with specific PIDs. Doing this reverse-translation outside of the kernel requires considerable space and compute, and it will have to be performed again by the existing system calls. Much of this work can be avoided if the pages can be migrated directly with physical memory addressing. Gregory Price (3): mm/migrate: refactor add_page_for_migration for code re-use mm/migrate: Create move_phys_pages syscall ktest: sys_move_phys_pages ktest arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + include/linux/syscalls.h | 5 + include/uapi/asm-generic/unistd.h | 8 +- kernel/sys_ni.c | 1 + mm/migrate.c | 288 ++++++++++++++++++++---- tools/include/uapi/asm-generic/unistd.h | 8 +- tools/testing/selftests/mm/migration.c | 99 ++++++++ 8 files changed, 370 insertions(+), 41 deletions(-) -- 2.39.1

1 year, 2 months

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[PATCH v2] tools/testing/selftests/bpf/test_tc_tunnel.sh: Prevent client connect before server bind

by Alessandro Carminati (Red Hat)

In some systems, the netcat server can incur in delay to start listening. When this happens, the test can randomly fail in various points. This is an example error message: # ip gre none gso # encap 192.168.1.1 to 192.168.1.2, type gre, mac none len 2000 # test basic connectivity # Ncat: Connection refused. The issue stems from a race condition between the netcat client and server. The test author had addressed this problem by implementing a sleep, which I have removed in this patch. This patch introduces a function capable of sleeping for up to two seconds. However, it can terminate the waiting period early if the port is reported to be listening. Signed-off-by: Alessandro Carminati (Red Hat) <alessandro.carminati(a)gmail.com> --- tools/testing/selftests/bpf/test_tc_tunnel.sh | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/test_tc_tunnel.sh b/tools/testing/selftests/bpf/test_tc_tunnel.sh index 910044f08908..7989ec608454 100755 --- a/tools/testing/selftests/bpf/test_tc_tunnel.sh +++ b/tools/testing/selftests/bpf/test_tc_tunnel.sh @@ -72,7 +72,6 @@ cleanup() { server_listen() { ip netns exec "${ns2}" nc "${netcat_opt}" -l "${port}" > "${outfile}" & server_pid=$! - sleep 0.2 } client_connect() { @@ -93,6 +92,16 @@ verify_data() { fi } +wait_for_port() { + for i in $(seq 20); do + if ip netns exec "${ns2}" ss ${2:--4}OHntl | grep -q "$1"; then + return 0 + fi + sleep 0.1 + done + return 1 +} + set -e # no arguments: automated test, run all @@ -193,6 +202,7 @@ setup # basic communication works echo "test basic connectivity" server_listen +wait_for_port ${port} ${netcat_opt} client_connect verify_data @@ -204,6 +214,7 @@ ip netns exec "${ns1}" tc filter add dev veth1 egress \ section "encap_${tuntype}_${mac}" echo "test bpf encap without decap (expect failure)" server_listen +wait_for_port ${port} ${netcat_opt} ! client_connect if [[ "$tuntype" =~ "udp" ]]; then -- 2.34.1

1 year, 2 months

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[PATCH 0/4] SNC support for resctrl selftests

by Maciej Wieczor-Retman

Sub-Numa Clustering (SNC) allows splitting CPU cores, caches and memory into multiple NUMA nodes. When enabled, NUMA-aware applications can achieve better performance on bigger server platforms. The series adding SNC support to the kernel is currently in review [1] but the selftests for resctrl need NUMA-aware adjustments to use these changes. Issues with resctrl selftests not working properly with SNC enabled were originally reported by Shaopeng Tan [2][3] and the following series resolves them. The main concept currently missing from resctrl selftests is that while resctrl tracks memory accesses on a single NUMA node (which normally is the same as the CPU socket) on machines with SNC enabled memory accesses can leak outside of the local NUMA node and into other NUMA nodes on the same socket. In that case resctrl could report a diminished value in one of its monitoring technologies: Cache Monitoring Technology (CMT) or Memory Bandwidth Monitoring (MBM) . Implemented solutions for both CMT and MBM follow the same idea which is to simply sum values reported by different NUMA nodes for a single Resource Monitoring ID (RMID). Series was tested on Ice Lake server platforms with SNC disabled, SNC-2 and SNC-4. The tests were also ran with and without kernel support for SNC. Series applies cleanly on kselftest/next. [1] https://lore.kernel.org/all/20240228112215.8044-tony.luck@intel.com/ [2] https://lore.kernel.org/all/TYAPR01MB6330B9B17686EF426D2C3F308B25A@TYAPR01M… [3] https://lore.kernel.org/lkml/TYAPR01MB6330A4EB3633B791939EA45E8B39A@TYAPR01… Maciej Wieczor-Retman (4): selftests/resctrl: Adjust effective L3 cache size with SNC enabled selftests/resctrl: SNC support for CMT selftests/resctrl: SNC support for MBM selftests/resctrl: Adjust SNC support messages tools/testing/selftests/resctrl/cache.c | 17 ++- tools/testing/selftests/resctrl/cat_test.c | 2 +- tools/testing/selftests/resctrl/cmt_test.c | 6 +- tools/testing/selftests/resctrl/mba_test.c | 3 +- tools/testing/selftests/resctrl/mbm_test.c | 4 +- tools/testing/selftests/resctrl/resctrl.h | 13 +- tools/testing/selftests/resctrl/resctrl_val.c | 46 ++++--- tools/testing/selftests/resctrl/resctrlfs.c | 128 +++++++++++++++++- 8 files changed, 185 insertions(+), 34 deletions(-) -- 2.44.0

1 year, 2 months

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Re: [Test Failure Report] exec: Test failures in execveat

by Khannanov Lenar

Try to disable tomoyo lsm.

1 year, 2 months

1
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[BUG] selftests/net: icmp_redirect.sh: 12 out of 40 test result with [FAIL]

by Mirsad Todorovac

Hi, With the commit v6.8-11167-g4438a810f396 in vanilla torvalds tree, there seem to be problems with the icmp_redirect.sh tests. The iproute2-next tools were used, commit 7a6d30c95da9. # timeout set to 3600 # selftests: net: icmp_redirect.sh # # ########################################################################### # Legacy routing # ########################################################################### # # TEST: IPv4: redirect exception [FAIL] # TEST: IPv6: redirect exception [ OK ] # TEST: IPv4: redirect exception plus mtu [FAIL] # TEST: IPv6: redirect exception plus mtu [ OK ] # TEST: IPv4: routing reset [ OK ] # TEST: IPv6: routing reset [ OK ] # TEST: IPv4: mtu exception [ OK ] # TEST: IPv6: mtu exception [ OK ] # TEST: IPv4: mtu exception plus redirect [FAIL] # TEST: IPv6: mtu exception plus redirect [ OK ] # # ########################################################################### # Legacy routing with VRF # ########################################################################### # # TEST: IPv4: redirect exception [FAIL] # TEST: IPv6: redirect exception [ OK ] # TEST: IPv4: redirect exception plus mtu [FAIL] # TEST: IPv6: redirect exception plus mtu [ OK ] # TEST: IPv4: routing reset [ OK ] # TEST: IPv6: routing reset [ OK ] # TEST: IPv4: mtu exception [ OK ] # TEST: IPv6: mtu exception [ OK ] # TEST: IPv4: mtu exception plus redirect [FAIL] # TEST: IPv6: mtu exception plus redirect [ OK ] # # ########################################################################### # Routing with nexthop objects # ########################################################################### # # TEST: IPv4: redirect exception [FAIL] # TEST: IPv6: redirect exception [ OK ] # TEST: IPv4: redirect exception plus mtu [FAIL] # TEST: IPv6: redirect exception plus mtu [ OK ] # TEST: IPv4: routing reset [ OK ] # TEST: IPv6: routing reset [ OK ] # TEST: IPv4: mtu exception [ OK ] # TEST: IPv6: mtu exception [ OK ] # TEST: IPv4: mtu exception plus redirect [FAIL] # TEST: IPv6: mtu exception plus redirect [ OK ] # # ########################################################################### # Routing with nexthop objects and VRF # ########################################################################### # # TEST: IPv4: redirect exception [FAIL] # TEST: IPv6: redirect exception [ OK ] # TEST: IPv4: redirect exception plus mtu [FAIL] # TEST: IPv6: redirect exception plus mtu [ OK ] # TEST: IPv4: routing reset [ OK ] # TEST: IPv6: routing reset [ OK ] # TEST: IPv4: mtu exception [ OK ] # TEST: IPv6: mtu exception [ OK ] # TEST: IPv4: mtu exception plus redirect [FAIL] # TEST: IPv6: mtu exception plus redirect [ OK ] # # Tests passed: 28 # Tests failed: 12 # Tests xfailed: 0 not ok 45 selftests: net: icmp_redirect.sh # exit=1 These errors are not introduced with this commit, but were already present at least in 6.8-rc7. Hope this helps. Best regards, Mirsad Todorovac

1 year, 2 months

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[PATCH V2 bpf-next 1/2] bpf: add bpf_task_get_cgroup kfunc

by Jose Fernandez

This patch enhances the BPF helpers by adding a kfunc to retrieve the cgroup v2 of a task, addressing a previous limitation where only bpf_task_get_cgroup1 was available for cgroup v1. The new kfunc is particularly useful for scenarios where obtaining the cgroup ID of a task other than the "current" one is necessary, which the existing bpf_get_current_cgroup_id helper cannot accommodate. A specific use case at Netflix involved the sched_switch tracepoint, where we had to get the cgroup IDs of both the prev and next tasks. The bpf_task_get_cgroup kfunc acquires and returns a reference to a task's default cgroup, ensuring thread-safe access by correctly implementing RCU read locking and unlocking. It leverages the existing cgroup.h helper, and cgroup_tryget to safely acquire a reference to it. Signed-off-by: Jose Fernandez <josef(a)netflix.com> Reviewed-by: Tycho Andersen <tycho(a)tycho.pizza> --- V1 -> V2: Return a pointer to the cgroup instead of the cgroup ID kernel/bpf/helpers.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index a89587859571..bbd19d5eedb6 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -2266,6 +2266,31 @@ bpf_task_get_cgroup1(struct task_struct *task, int hierarchy_id) return NULL; return cgrp; } + +/** + * bpf_task_get_cgroup - Acquire a reference to the default cgroup of a task. + * @task: The target task + * + * This function returns the task's default cgroup, primarily + * designed for use with cgroup v2. In cgroup v1, the concept of default + * cgroup varies by subsystem, and while this function will work with + * cgroup v1, it's recommended to use bpf_task_get_cgroup1 instead. + * A cgroup returned by this kfunc which is not subsequently stored in a + * map, must be released by calling bpf_cgroup_release(). + * + * Return: On success, the cgroup is returned. On failure, NULL is returned. + */ +__bpf_kfunc struct cgroup *bpf_task_get_cgroup(struct task_struct *task) +{ + struct cgroup *cgrp; + + rcu_read_lock(); + cgrp = task_dfl_cgroup(task); + if (!cgroup_tryget(cgrp)) + cgrp = NULL; + rcu_read_unlock(); + return cgrp; +} #endif /* CONFIG_CGROUPS */ /** @@ -2573,6 +2598,7 @@ BTF_ID_FLAGS(func, bpf_cgroup_ancestor, KF_ACQUIRE | KF_RCU | KF_RET_NULL) BTF_ID_FLAGS(func, bpf_cgroup_from_id, KF_ACQUIRE | KF_RET_NULL) BTF_ID_FLAGS(func, bpf_task_under_cgroup, KF_RCU) BTF_ID_FLAGS(func, bpf_task_get_cgroup1, KF_ACQUIRE | KF_RCU | KF_RET_NULL) +BTF_ID_FLAGS(func, bpf_task_get_cgroup, KF_ACQUIRE | KF_RCU | KF_RET_NULL) #endif BTF_ID_FLAGS(func, bpf_task_from_pid, KF_ACQUIRE | KF_RET_NULL) BTF_ID_FLAGS(func, bpf_throw) base-commit: 4c8644f86c854c214aaabbcc24a27fa4c7e6a951 -- 2.40.1

1 year, 2 months

6
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[PATCH v4] kunit: tool: add ability to parse multiple files

by Rae Moar

Add ability to parse multiple files. Additionally add the ability to parse all results in the KUnit debugfs repository. How to parse multiple files: ./tools/testing/kunit/kunit.py parse results.log results2.log How to parse all files in directory: ./tools/testing/kunit/kunit.py parse directory_path/* How to parse KUnit debugfs repository: ./tools/testing/kunit/kunit.py parse debugfs For each file, the parser outputs the file name, results, and test summary. At the end of all parsing, the parser outputs a total summary line. This feature can be easily tested on the tools/testing/kunit/test_data/ directory. Signed-off-by: Rae Moar <rmoar(a)google.com> --- Changes since v3: - Changing from input() to stdin - Add checking for non-regular files - Spacing fix - Small printing fix tools/testing/kunit/kunit.py | 54 +++++++++++++++++++++++++----------- 1 file changed, 38 insertions(+), 16 deletions(-) diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py index bc74088c458a..641b8ca83e3e 100755 --- a/tools/testing/kunit/kunit.py +++ b/tools/testing/kunit/kunit.py @@ -511,19 +511,40 @@ def exec_handler(cli_args: argparse.Namespace) -> None: def parse_handler(cli_args: argparse.Namespace) -> None: - if cli_args.file is None: - sys.stdin.reconfigure(errors='backslashreplace') # type: ignore - kunit_output = sys.stdin # type: Iterable[str] - else: - with open(cli_args.file, 'r', errors='backslashreplace') as f: - kunit_output = f.read().splitlines() - # We know nothing about how the result was created! - metadata = kunit_json.Metadata() - request = KunitParseRequest(raw_output=cli_args.raw_output, - json=cli_args.json) - result, _ = parse_tests(request, metadata, kunit_output) - if result.status != KunitStatus.SUCCESS: - sys.exit(1) + parsed_files = cli_args.files # type: List[str] + total_test = kunit_parser.Test() + total_test.status = kunit_parser.TestStatus.SUCCESS + if not parsed_files: + parsed_files.append('/dev/stdin') + elif len(parsed_files) == 1 and parsed_files[0] == "debugfs": + parsed_files.pop() + for (root, _, files) in os.walk("/sys/kernel/debug/kunit"): + parsed_files.extend(os.path.join(root, f) for f in files if f == "results") + if not parsed_files: + print("No files found.") + + for file in parsed_files: + if os.path.isdir(file): + print(f'Ignoring directory "{file}"') + elif os.path.exists(file): + print(file) + with open(file, 'r', errors='backslashreplace') as f: + kunit_output = f.read().splitlines() + # We know nothing about how the result was created! + metadata = kunit_json.Metadata() + request = KunitParseRequest(raw_output=cli_args.raw_output, + json=cli_args.json) + _, test = parse_tests(request, metadata, kunit_output) + total_test.subtests.append(test) + else: + print(f'Could not find "{file}"') + + if len(parsed_files) > 1: # if more than one file was parsed output total summary + print('All files parsed.') + if not request.raw_output: + stdout.print_with_timestamp(kunit_parser.DIVIDER) + kunit_parser.bubble_up_test_results(total_test) + kunit_parser.print_summary_line(total_test) subcommand_handlers_map = { @@ -569,9 +590,10 @@ def main(argv: Sequence[str]) -> None: help='Parses KUnit results from a file, ' 'and parses formatted results.') add_parse_opts(parse_parser) - parse_parser.add_argument('file', - help='Specifies the file to read results from.', - type=str, nargs='?', metavar='input_file') + parse_parser.add_argument('files', + help='List of file paths to read results from or keyword' + '"debugfs" to read all results from the debugfs directory.', + type=str, nargs='*', metavar='input_files') cli_args = parser.parse_args(massage_argv(argv)) base-commit: 806cb2270237ce2ec672a407d66cee17a07d3aa2 -- 2.44.0.291.gc1ea87d7ee-goog

1 year, 2 months

1
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[PATCH v3] kunit: tool: add ability to parse multiple files

by Rae Moar

Add ability to parse multiple files. Additionally add the ability to parse all results in the KUnit debugfs repository. How to parse multiple files: ./tools/testing/kunit/kunit.py parse results.log results2.log How to parse all files in directory: ./tools/testing/kunit/kunit.py parse directory_path/* How to parse KUnit debugfs repository: ./tools/testing/kunit/kunit.py parse debugfs For each file, the parser outputs the file name, results, and test summary. At the end of all parsing, the parser outputs a total summary line. This feature can be easily tested on the tools/testing/kunit/test_data/ directory. Signed-off-by: Rae Moar <rmoar(a)google.com> --- Changes since v2: - Fixed bug with input from command line. I changed this to use input(). Daniel, let me know if this works for you. - Add more specific warning messages tools/testing/kunit/kunit.py | 56 +++++++++++++++++++++++++----------- 1 file changed, 40 insertions(+), 16 deletions(-) diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py index bc74088c458a..1aa3d736d80c 100755 --- a/tools/testing/kunit/kunit.py +++ b/tools/testing/kunit/kunit.py @@ -511,19 +511,42 @@ def exec_handler(cli_args: argparse.Namespace) -> None: def parse_handler(cli_args: argparse.Namespace) -> None: - if cli_args.file is None: - sys.stdin.reconfigure(errors='backslashreplace') # type: ignore - kunit_output = sys.stdin # type: Iterable[str] - else: - with open(cli_args.file, 'r', errors='backslashreplace') as f: - kunit_output = f.read().splitlines() - # We know nothing about how the result was created! - metadata = kunit_json.Metadata() - request = KunitParseRequest(raw_output=cli_args.raw_output, - json=cli_args.json) - result, _ = parse_tests(request, metadata, kunit_output) - if result.status != KunitStatus.SUCCESS: - sys.exit(1) + parsed_files = cli_args.files # type: List[str] + total_test = kunit_parser.Test() + total_test.status = kunit_parser.TestStatus.SUCCESS + if not parsed_files: + parsed_files.append(input("File path: ")) + + if parsed_files[0] == "debugfs" and len(parsed_files) == 1: + parsed_files.pop() + for (root, _, files) in os.walk("/sys/kernel/debug/kunit"): + parsed_files.extend(os.path.join(root, f) for f in files if f == "results") + + if not parsed_files: + print("No files found.") + + for file in parsed_files: + if os.path.isfile(file): + print(file) + with open(file, 'r', errors='backslashreplace') as f: + kunit_output = f.read().splitlines() + # We know nothing about how the result was created! + metadata = kunit_json.Metadata() + request = KunitParseRequest(raw_output=cli_args.raw_output, + json=cli_args.json) + _, test = parse_tests(request, metadata, kunit_output) + total_test.subtests.append(test) + elif os.path.isdir(file): + print("Ignoring directory ", file) + else: + print("Could not find ", file) + + if len(parsed_files) > 1: # if more than one file was parsed output total summary + print('All files parsed.') + if not request.raw_output: + stdout.print_with_timestamp(kunit_parser.DIVIDER) + kunit_parser.bubble_up_test_results(total_test) + kunit_parser.print_summary_line(total_test) subcommand_handlers_map = { @@ -569,9 +592,10 @@ def main(argv: Sequence[str]) -> None: help='Parses KUnit results from a file, ' 'and parses formatted results.') add_parse_opts(parse_parser) - parse_parser.add_argument('file', - help='Specifies the file to read results from.', - type=str, nargs='?', metavar='input_file') + parse_parser.add_argument('files', + help='List of file paths to read results from or keyword' + '"debugfs" to read all results from the debugfs directory.', + type=str, nargs='*', metavar='input_files') cli_args = parser.parse_args(massage_argv(argv)) base-commit: 806cb2270237ce2ec672a407d66cee17a07d3aa2 -- 2.44.0.278.ge034bb2e1d-goog

1 year, 2 months

2
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[PATCH] selftests/exec: Convert remaining /bin/sh to /bin/bash

by Kees Cook

As was intended with commit 17107429947b ("selftests/exec: Perform script checks with /bin/bash"), convert the other instance of /bin/sh to /bin/bash. It appears that at least Debian Bookworm's /bin/sh (dash) does not conform to POSIX's "return 127 when script not found" requirement. Fixes: 17107429947b ("selftests/exec: Perform script checks with /bin/bash") Reported-by: Muhammad Usama Anjum <usama.anjum(a)collabora.com> Closes: https://lore.kernel.org/lkml/02c8bf8e-1934-44ab-a886-e065b37366a7@collabora… Signed-off-by: Kees Cook <keescook(a)chromium.org> --- Cc: Muhammad Usama Anjum <usama.anjum(a)collabora.com> Cc: Eric Biederman <ebiederm(a)xmission.com> Cc: Shuah Khan <shuah(a)kernel.org> Cc: "kernelci.org bot" <bot(a)kernelci.org> Cc: Yang Yingliang <yangyingliang(a)huawei.com> Cc: linux-mm(a)kvack.org Cc: linux-kselftest(a)vger.kernel.org --- tools/testing/selftests/exec/Makefile | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/exec/Makefile b/tools/testing/selftests/exec/Makefile index a0b8688b0836..fb4472ddffd8 100644 --- a/tools/testing/selftests/exec/Makefile +++ b/tools/testing/selftests/exec/Makefile @@ -19,8 +19,8 @@ include ../lib.mk $(OUTPUT)/subdir: mkdir -p $@ -$(OUTPUT)/script: - echo '#!/bin/sh' > $@ +$(OUTPUT)/script: Makefile + echo '#!/bin/bash' > $@ echo 'exit $$*' >> $@ chmod +x $@ $(OUTPUT)/execveat.symlink: $(OUTPUT)/execveat -- 2.34.1

1 year, 2 months

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Linux-kselftest-mirror March 2024