- Linux-kselftest-mirror - lists.linaro.org

[PATCH] selftests: timers: Fix grammar and clarify comments in nanosleep.c

by Rahul Kumar

Improved the clarity and grammar in the header comment of nanosleep.c for better readability and consistency with kernel documentation style. Signed-off-by: Rahul Kumar <rk0006818(a)gmail.com> --- tools/testing/selftests/timers/nanosleep.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/tools/testing/selftests/timers/nanosleep.c b/tools/testing/selftests/timers/nanosleep.c index 252c6308c569..84adf8a4ab5d 100644 --- a/tools/testing/selftests/timers/nanosleep.c +++ b/tools/testing/selftests/timers/nanosleep.c @@ -1,12 +1,12 @@ -/* Make sure timers don't return early - * by: john stultz (johnstul(a)us.ibm.com) - * John Stultz (john.stultz(a)linaro.org) - * (C) Copyright IBM 2012 - * (C) Copyright Linaro 2013 2015 - * Licensed under the GPLv2 + /* + * Ensure timers do not return early. + * Author: John Stultz (john.stultz(a)linaro.org) + * Copyright (C) IBM 2012 + * Copyright (C) Linaro 2013, 2015 + * Licensed under the GPLv2 * - * To build: - * $ gcc nanosleep.c -o nanosleep -lrt + * To build: + * $ gcc nanosleep.c -o nanosleep -lrt * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -61,7 +61,7 @@ char *clockstring(int clockid) case CLOCK_TAI: return "CLOCK_TAI"; }; - return "UNKNOWN_CLOCKID"; + return "UNKNOWN_CLOCKID"; // Could not identify clockid } /* returns 1 if a <= b, 0 otherwise */ @@ -90,7 +90,7 @@ int nanosleep_test(int clockid, long long ns) { struct timespec now, target, rel; - /* First check abs time */ + /* First, check absolute time using clock_nanosleep with TIMER_ABSTIME */ if (clock_gettime(clockid, &now)) return UNSUPPORTED; target = timespec_add(now, ns); @@ -102,7 +102,7 @@ int nanosleep_test(int clockid, long long ns) if (!in_order(target, now)) return -1; - /* Second check reltime */ + /* Then, test relative time sleep */ clock_gettime(clockid, &now); rel.tv_sec = 0; rel.tv_nsec = 0; -- 2.43.0

1 month, 1 week

2
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[PATCH] selftests: size: fix grammar and align output formatting

by Abdelrahman Fekry

Improve the grammar in the test name by changing "get runtime memory use" to "get runtime memory usage". Also adjust spacing in output lines ("Total:", "Free:", etc.) to ensure consistent alignment and readability. Signed-off-by: Abdelrahman Fekry <AbdelrahmanFekry375(a)gmail.com> --- tools/testing/selftests/size/get_size.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/size/get_size.c b/tools/testing/selftests/size/get_size.c index 2980b1a63366..d5b67c073d8e 100644 --- a/tools/testing/selftests/size/get_size.c +++ b/tools/testing/selftests/size/get_size.c @@ -86,7 +86,7 @@ void _start(void) int ccode; struct sysinfo info; unsigned long used; - static const char *test_name = " get runtime memory use\n"; + static const char *test_name = " get runtime memory usage\n"; print("TAP version 13\n"); print("# Testing system size.\n"); @@ -105,8 +105,8 @@ void _start(void) used = info.totalram - info.freeram - info.bufferram; print("# System runtime memory report (units in Kilobytes):\n"); print(" ---\n"); - print_k_value(" Total: ", info.totalram, info.mem_unit); - print_k_value(" Free: ", info.freeram, info.mem_unit); + print_k_value(" Total : ", info.totalram, info.mem_unit); + print_k_value(" Free : ", info.freeram, info.mem_unit); print_k_value(" Buffer: ", info.bufferram, info.mem_unit); print_k_value(" In use: ", used, info.mem_unit); print(" ...\n"); -- 2.25.1

1 month, 1 week

2
1
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[PATCH v4 0/7] futex: Create set_robust_list2

by André Almeida

This patch adds a new robust_list() syscall. The current syscall can't be expanded to cover the following use case, so a new one is needed. This new syscall allows users to set multiple robust lists per process and to have either 32bit or 64bit pointers in the list. * Use case FEX-Emu[1] is an application that runs x86 and x86-64 binaries on an AArch64 Linux host. One of the tasks of FEX-Emu is to translate syscalls from one platform to another. Existing set_robust_list() can't be easily translated because of two limitations: 1) x86 apps can have 32bit pointers robust lists. For a x86-64 kernel this is not a problem, because of the compat entry point. But there's no such compat entry point for AArch64, so the kernel would do the pointer arithmetic wrongly. Is also unviable to userspace to keep track every addition/removal to the robust list and keep a 64bit version of it somewhere else to feed the kernel. Thus, the new interface has an option of telling the kernel if the list is filled with 32bit or 64bit pointers. 2) Apps can set just one robust list (in theory, x86-64 can set two if they also use the compat entry point). That means that when a x86 app asks FEX-Emu to call set_robust_list(), FEX have two options: to overwrite their own robust list pointer and make the app robust, or to ignore the app robust list and keep the emulator robust. The new interface allows for multiple robust lists per application, solving this. * Interface This is the proposed interface: long set_robust_list2(void *head, int index, unsigned int flags) `head` is the head of the userspace struct robust_list_head, just as old set_robust_list(). It needs to be a void pointer since it can point to a normal robust_list_head or a compat_robust_list_head. `flags` can be used for defining the list type: enum robust_list_type { ROBUST_LIST_32BIT, ROBUST_LIST_64BIT, }; `index` is the index in the internal robust_list's linked list (the naming starts to get confusing, I reckon). If `index == -1`, that means that user wants to set a new robust_list, and the kernel will append it in the end of the list, assign a new index and return this index to the user. If `index >= 0`, that means that user wants to re-set `*head` of an already existing list (similarly to what happens when you call set_robust_list() twice with different `*head`). If `index` is out of range, or it points to a non-existing robust_list, or if the internal list is full, an error is returned. * Implementation The implementation re-uses most of the existing robust list interface as possible. The new task_struct member `struct list_head robust_list2` is just a linked list where new lists are appended as the user requests more lists, and by futex_cleanup(), the kernel walks through the internal list feeding exit_robust_list() with the robust_list's. This implementation supports up to 10 lists (defined at ROBUST_LISTS_PER_TASK), but it was an arbitrary number for this RFC. For the described use case above, 4 should be enough, I'm not sure which should be the limit. It doesn't support list removal (should it support?). It doesn't have a proper get_robust_list2() yet as well, but I can add it in a next revision. We could also have a generic robust_list() syscall that can be used to set/get and be controlled by flags. The new interface has a `unsigned int flags` argument, making it extensible for future use cases as well. It refuses unaligned `head` addresses. It doesn't have a limit for elements in a single list (like ROBUST_LIST_LIMIT), it destroys the list as it is parsed to be safe against circular lists. * Testing This patcheset has a selftest patch that expands this one: https://lore.kernel.org/lkml/20250212131123.37431-1-andrealmeid@igalia.com/ Also, FEX-Emu added support for this interface to validate it: https://github.com/FEX-Emu/FEX/pull/3966 Feedback is very welcomed! Thanks, André [1] https://github.com/FEX-Emu/FEX Changelog: - Rebased on top of new futex work (private hash) v4: https://lore.kernel.org/lkml/20250225183531.682556-1-andrealmeid@igalia.com/ - Refuse unaligned head pointers - Ignore ROBUST_LIST_LIMIT for lists created with this interface and make it robust against circular lists - Fix a get_robust_list() syscall bug for getting the list from another thread - Adapt selftest to use the new interface v3: https://lore.kernel.org/lkml/20241217174958.477692-1-andrealmeid@igalia.com/ - Old syscall set_robust_list() adds new head to the internal linked list of robust lists pointers, instead of having a field just for them. Remove tsk->robust_list and use only tsk->robust_list2 v2: https://lore.kernel.org/lkml/20241101162147.284993-1-andrealmeid@igalia.com/ - Added a patch to properly deal with exit_robust_list() in 64bit vs 32bit - Wired-up syscall for all archs - Added more of the cover letter to the commit message v1: https://lore.kernel.org/lkml/20241024145735.162090-1-andrealmeid@igalia.com/ --- André Almeida (7): selftests/futex: Add ASSERT_ macros selftests/futex: Create test for robust list futex: Use explicit sizes for compat_exit_robust_list futex: Create set_robust_list2 futex: Wire up set_robust_list2 syscall futex: Remove the limit of elements for sys_set_robust_list2 lists selftests: futex: Expand robust list test for the new interface arch/alpha/kernel/syscalls/syscall.tbl | 1 + arch/arm/tools/syscall.tbl | 1 + arch/m68k/kernel/syscalls/syscall.tbl | 1 + arch/microblaze/kernel/syscalls/syscall.tbl | 1 + arch/mips/kernel/syscalls/syscall_n32.tbl | 1 + arch/mips/kernel/syscalls/syscall_n64.tbl | 1 + arch/mips/kernel/syscalls/syscall_o32.tbl | 1 + arch/parisc/kernel/syscalls/syscall.tbl | 1 + arch/powerpc/kernel/syscalls/syscall.tbl | 1 + arch/s390/kernel/syscalls/syscall.tbl | 1 + arch/sh/kernel/syscalls/syscall.tbl | 1 + arch/sparc/kernel/syscalls/syscall.tbl | 1 + arch/x86/entry/syscalls/syscall_32.tbl | 1 + arch/x86/entry/syscalls/syscall_64.tbl | 1 + arch/xtensa/kernel/syscalls/syscall.tbl | 1 + include/linux/compat.h | 12 +- include/linux/futex.h | 16 +- include/linux/sched.h | 5 +- include/uapi/asm-generic/unistd.h | 2 + include/uapi/linux/futex.h | 24 + kernel/futex/core.c | 165 ++++- kernel/futex/futex.h | 5 + kernel/futex/syscalls.c | 85 ++- kernel/sys_ni.c | 1 + scripts/syscall.tbl | 1 + .../testing/selftests/futex/functional/.gitignore | 1 + tools/testing/selftests/futex/functional/Makefile | 3 +- .../selftests/futex/functional/robust_list.c | 706 +++++++++++++++++++++ tools/testing/selftests/futex/include/logging.h | 38 ++ 29 files changed, 1026 insertions(+), 53 deletions(-) --- base-commit: 3ee84e3dd88e39b55b534e17a7b9a181f1d46809 change-id: 20250225-tonyk-robust_futex-60adeedac695 Best regards, -- André Almeida <andrealmeid(a)igalia.com>

1 month, 1 week

2
11
0 0

[PATCH][next] selftests/futex: Fix spelling mistake "manaul" -> "manual"

by Colin Ian King

There is a spelling mistake in a ksft_test_result message. Fix it. Signed-off-by: Colin Ian King <colin.i.king(a)gmail.com> --- tools/testing/selftests/futex/functional/futex_priv_hash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/futex/functional/futex_priv_hash.c b/tools/testing/selftests/futex/functional/futex_priv_hash.c index 2dca18fefedc..0213eb0bb4af 100644 --- a/tools/testing/selftests/futex/functional/futex_priv_hash.c +++ b/tools/testing/selftests/futex/functional/futex_priv_hash.c @@ -242,7 +242,7 @@ int main(int argc, char *argv[]) join_max_threads(); ret = futex_hash_slots_get(); - ksft_test_result(ret == 2, "No more auto-resize after manaul setting, got %d\n", + ksft_test_result(ret == 2, "No more auto-resize after manual setting, got %d\n", ret); futex_hash_slots_set_must_fail(1 << 29, 0); -- 2.49.0

1 month, 1 week

1
0
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[PATCH] selftests/mm: Fix test result reporting in gup_longterm

by Mark Brown

The kselftest framework uses the string logged when a test result is reported as the unique identifier for a test, using it to track test results between runs. The gup_longterm test completely fails to follow this pattern, it runs a single test function repeatedly with various parameters but each result report is a string logging an error message which is fixed between runs. Since the code already logs each test uniquely before it starts refactor to also print this to a buffer, then use that name as the test result. This isn't especially pretty, really this test could use a more substantial cleanup. Signed-off-by: Mark Brown <broonie(a)kernel.org> --- tools/testing/selftests/mm/gup_longterm.c | 163 ++++++++++++++++++++---------- 1 file changed, 107 insertions(+), 56 deletions(-) diff --git a/tools/testing/selftests/mm/gup_longterm.c b/tools/testing/selftests/mm/gup_longterm.c index 21595b20bbc3..a849537f9372 100644 --- a/tools/testing/selftests/mm/gup_longterm.c +++ b/tools/testing/selftests/mm/gup_longterm.c @@ -35,6 +35,8 @@ static int nr_hugetlbsizes; static size_t hugetlbsizes[10]; static int gup_fd; +static char test_name[1024]; + static __fsword_t get_fs_type(int fd) { struct statfs fs; @@ -93,33 +95,48 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) __fsword_t fs_type = get_fs_type(fd); bool should_work; char *mem; + int result = KSFT_PASS; int ret; + if (fd < 0) { + result = KSFT_FAIL; + goto report; + } + if (ftruncate(fd, size)) { if (errno == ENOENT) { skip_test_dodgy_fs("ftruncate()"); } else { - ksft_test_result_fail("ftruncate() failed (%s)\n", strerror(errno)); + ksft_print_msg("ftruncate() failed (%s)\n", + strerror(errno)); + result = KSFT_FAIL; + goto report; } return; } if (fallocate(fd, 0, 0, size)) { - if (size == pagesize) - ksft_test_result_fail("fallocate() failed (%s)\n", strerror(errno)); - else - ksft_test_result_skip("need more free huge pages\n"); - return; + if (size == pagesize) { + ksft_print_msg("fallocate() failed (%s)\n", strerror(errno)); + result = KSFT_FAIL; + } else { + ksft_print_msg("need more free huge pages\n"); + result = KSFT_SKIP; + } + goto report; } mem = mmap(NULL, size, PROT_READ | PROT_WRITE, shared ? MAP_SHARED : MAP_PRIVATE, fd, 0); if (mem == MAP_FAILED) { - if (size == pagesize || shared) - ksft_test_result_fail("mmap() failed (%s)\n", strerror(errno)); - else - ksft_test_result_skip("need more free huge pages\n"); - return; + if (size == pagesize || shared) { + ksft_print_msg("mmap() failed (%s)\n", strerror(errno)); + result = KSFT_FAIL; + } else { + ksft_print_msg("need more free huge pages\n"); + result = KSFT_SKIP; + } + goto report; } /* Fault in the page such that GUP-fast can pin it directly. */ @@ -134,7 +151,8 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) */ ret = mprotect(mem, size, PROT_READ); if (ret) { - ksft_test_result_fail("mprotect() failed (%s)\n", strerror(errno)); + ksft_print_msg("mprotect() failed (%s)\n", strerror(errno)); + result = KSFT_FAIL; goto munmap; } /* FALLTHROUGH */ @@ -147,12 +165,14 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) type == TEST_TYPE_RW_FAST; if (gup_fd < 0) { - ksft_test_result_skip("gup_test not available\n"); + ksft_print_msg("gup_test not available\n"); + result = KSFT_SKIP; break; } if (rw && shared && fs_is_unknown(fs_type)) { - ksft_test_result_skip("Unknown filesystem\n"); + ksft_print_msg("Unknown filesystem\n"); + result = KSFT_SKIP; return; } /* @@ -169,14 +189,19 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) args.flags |= rw ? PIN_LONGTERM_TEST_FLAG_USE_WRITE : 0; ret = ioctl(gup_fd, PIN_LONGTERM_TEST_START, &args); if (ret && errno == EINVAL) { - ksft_test_result_skip("PIN_LONGTERM_TEST_START failed (EINVAL)n"); + ksft_print_msg("PIN_LONGTERM_TEST_START failed (EINVAL)n"); + result = KSFT_SKIP; break; } else if (ret && errno == EFAULT) { - ksft_test_result(!should_work, "Should have failed\n"); + if (should_work) + result = KSFT_FAIL; + else + result = KSFT_PASS; break; } else if (ret) { - ksft_test_result_fail("PIN_LONGTERM_TEST_START failed (%s)\n", - strerror(errno)); + ksft_print_msg("PIN_LONGTERM_TEST_START failed (%s)\n", + strerror(errno)); + result = KSFT_FAIL; break; } @@ -189,7 +214,10 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) * some previously unsupported filesystems, we might want to * perform some additional tests for possible data corruptions. */ - ksft_test_result(should_work, "Should have worked\n"); + if (should_work) + result = KSFT_PASS; + else + result = KSFT_FAIL; break; } #ifdef LOCAL_CONFIG_HAVE_LIBURING @@ -199,8 +227,9 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) /* io_uring always pins pages writable. */ if (shared && fs_is_unknown(fs_type)) { - ksft_test_result_skip("Unknown filesystem\n"); - return; + ksft_print_msg("Unknown filesystem\n"); + result = KSFT_SKIP; + goto report; } should_work = !shared || fs_supports_writable_longterm_pinning(fs_type); @@ -208,8 +237,9 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) /* Skip on errors, as we might just lack kernel support. */ ret = io_uring_queue_init(1, &ring, 0); if (ret < 0) { - ksft_test_result_skip("io_uring_queue_init() failed (%s)\n", - strerror(-ret)); + ksft_print_msg("io_uring_queue_init() failed (%s)\n", + strerror(-ret)); + result = KSFT_SKIP; break; } /* @@ -222,17 +252,28 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) /* Only new kernels return EFAULT. */ if (ret && (errno == ENOSPC || errno == EOPNOTSUPP || errno == EFAULT)) { - ksft_test_result(!should_work, "Should have failed (%s)\n", - strerror(errno)); + if (should_work) { + ksft_print_msg("Should have failed (%s)\n", + strerror(errno)); + result = KSFT_FAIL; + } else { + result = KSFT_PASS; + } } else if (ret) { /* * We might just lack support or have insufficient * MEMLOCK limits. */ - ksft_test_result_skip("io_uring_register_buffers() failed (%s)\n", - strerror(-ret)); + ksft_print_msg("io_uring_register_buffers() failed (%s)\n", + strerror(-ret)); + result = KSFT_SKIP; } else { - ksft_test_result(should_work, "Should have worked\n"); + if (should_work) { + result = KSFT_PASS; + } else { + ksft_print_msg("Should have worked\n"); + result = KSFT_FAIL; + } io_uring_unregister_buffers(&ring); } @@ -246,21 +287,32 @@ static void do_test(int fd, size_t size, enum test_type type, bool shared) munmap: munmap(mem, size); +report: + ksft_test_result(result, "%s\n", test_name); } typedef void (*test_fn)(int fd, size_t size); +static void log_test_start(const char *name, ...) +{ + va_list args; + va_start(args, name); + + vsnprintf(test_name, sizeof(test_name), name, args); + ksft_print_msg("[RUN] %s\n", test_name); + + va_end(args); +} + static void run_with_memfd(test_fn fn, const char *desc) { int fd; - ksft_print_msg("[RUN] %s ... with memfd\n", desc); + log_test_start("%s ... with memfd", desc); fd = memfd_create("test", 0); - if (fd < 0) { - ksft_test_result_fail("memfd_create() failed (%s)\n", strerror(errno)); - return; - } + if (fd < 0) + ksft_print_msg("memfd_create() failed (%s)\n", strerror(errno)); fn(fd, pagesize); close(fd); @@ -271,23 +323,23 @@ static void run_with_tmpfile(test_fn fn, const char *desc) FILE *file; int fd; - ksft_print_msg("[RUN] %s ... with tmpfile\n", desc); + log_test_start("%s ... with tmpfile", desc); file = tmpfile(); if (!file) { - ksft_test_result_fail("tmpfile() failed (%s)\n", strerror(errno)); - return; - } - - fd = fileno(file); - if (fd < 0) { - ksft_test_result_fail("fileno() failed (%s)\n", strerror(errno)); - goto close; + ksft_print_msg("tmpfile() failed (%s)\n", strerror(errno)); + fd = -1; + } else { + fd = fileno(file); + if (fd < 0) { + ksft_print_msg("fileno() failed (%s)\n", strerror(errno)); + } } fn(fd, pagesize); -close: - fclose(file); + + if (file) + fclose(file); } static void run_with_local_tmpfile(test_fn fn, const char *desc) @@ -295,22 +347,22 @@ static void run_with_local_tmpfile(test_fn fn, const char *desc) char filename[] = __FILE__"_tmpfile_XXXXXX"; int fd; - ksft_print_msg("[RUN] %s ... with local tmpfile\n", desc); + log_test_start("%s ... with local tmpfile", desc); fd = mkstemp(filename); - if (fd < 0) { - ksft_test_result_fail("mkstemp() failed (%s)\n", strerror(errno)); - return; - } + if (fd < 0) + ksft_print_msg("mkstemp() failed (%s)\n", strerror(errno)); if (unlink(filename)) { - ksft_test_result_fail("unlink() failed (%s)\n", strerror(errno)); - goto close; + ksft_print_msg("unlink() failed (%s)\n", strerror(errno)); + close(fd); + fd = -1; } fn(fd, pagesize); -close: - close(fd); + + if (fd >= 0) + close(fd); } static void run_with_memfd_hugetlb(test_fn fn, const char *desc, @@ -319,15 +371,14 @@ static void run_with_memfd_hugetlb(test_fn fn, const char *desc, int flags = MFD_HUGETLB; int fd; - ksft_print_msg("[RUN] %s ... with memfd hugetlb (%zu kB)\n", desc, + log_test_start("%s ... with memfd hugetlb (%zu kB)", desc, hugetlbsize / 1024); flags |= __builtin_ctzll(hugetlbsize) << MFD_HUGE_SHIFT; fd = memfd_create("test", flags); if (fd < 0) { - ksft_test_result_skip("memfd_create() failed (%s)\n", strerror(errno)); - return; + ksft_print_msg("memfd_create() failed (%s)\n", strerror(errno)); } fn(fd, hugetlbsize); --- base-commit: 82f2b0b97b36ee3fcddf0f0780a9a0825d52fec3 change-id: 20250514-selftests-mm-gup-longterm-dups-68aa4e0fcc88 Best regards, -- Mark Brown <broonie(a)kernel.org>

1 month, 1 week

3
14
0 0

[PATCH v7 00/14] riscv: add SBI FWFT misaligned exception delegation support

by Clément Léger

The SBI Firmware Feature extension allows the S-mode to request some specific features (either hardware or software) to be enabled. This series uses this extension to request misaligned access exception delegation to S-mode in order to let the kernel handle it. It also adds support for the KVM FWFT SBI extension based on the misaligned access handling infrastructure. FWFT SBI extension is part of the SBI V3.0 specifications [1]. It can be tested using the qemu provided at [2] which contains the series from [3]. Upstream kvm-unit-tests can be used inside kvm to tests the correct delegation of misaligned exceptions. Upstream OpenSBI can be used. Note: Since SBI V3.0 is not yet ratified, FWFT extension API is split between interface only and implementation, allowing to pick only the interface which do not have hard dependencies on SBI. The tests can be run using the kselftest from series [4]. $ qemu-system-riscv64 \ -cpu rv64,trap-misaligned-access=true,v=true \ -M virt \ -m 1024M \ -bios fw_dynamic.bin \ -kernel Image ... # ./misaligned TAP version 13 1..23 # Starting 23 tests from 1 test cases. # RUN global.gp_load_lh ... # OK global.gp_load_lh ok 1 global.gp_load_lh # RUN global.gp_load_lhu ... # OK global.gp_load_lhu ok 2 global.gp_load_lhu # RUN global.gp_load_lw ... # OK global.gp_load_lw ok 3 global.gp_load_lw # RUN global.gp_load_lwu ... # OK global.gp_load_lwu ok 4 global.gp_load_lwu # RUN global.gp_load_ld ... # OK global.gp_load_ld ok 5 global.gp_load_ld # RUN global.gp_load_c_lw ... # OK global.gp_load_c_lw ok 6 global.gp_load_c_lw # RUN global.gp_load_c_ld ... # OK global.gp_load_c_ld ok 7 global.gp_load_c_ld # RUN global.gp_load_c_ldsp ... # OK global.gp_load_c_ldsp ok 8 global.gp_load_c_ldsp # RUN global.gp_load_sh ... # OK global.gp_load_sh ok 9 global.gp_load_sh # RUN global.gp_load_sw ... # OK global.gp_load_sw ok 10 global.gp_load_sw # RUN global.gp_load_sd ... # OK global.gp_load_sd ok 11 global.gp_load_sd # RUN global.gp_load_c_sw ... # OK global.gp_load_c_sw ok 12 global.gp_load_c_sw # RUN global.gp_load_c_sd ... # OK global.gp_load_c_sd ok 13 global.gp_load_c_sd # RUN global.gp_load_c_sdsp ... # OK global.gp_load_c_sdsp ok 14 global.gp_load_c_sdsp # RUN global.fpu_load_flw ... # OK global.fpu_load_flw ok 15 global.fpu_load_flw # RUN global.fpu_load_fld ... # OK global.fpu_load_fld ok 16 global.fpu_load_fld # RUN global.fpu_load_c_fld ... # OK global.fpu_load_c_fld ok 17 global.fpu_load_c_fld # RUN global.fpu_load_c_fldsp ... # OK global.fpu_load_c_fldsp ok 18 global.fpu_load_c_fldsp # RUN global.fpu_store_fsw ... # OK global.fpu_store_fsw ok 19 global.fpu_store_fsw # RUN global.fpu_store_fsd ... # OK global.fpu_store_fsd ok 20 global.fpu_store_fsd # RUN global.fpu_store_c_fsd ... # OK global.fpu_store_c_fsd ok 21 global.fpu_store_c_fsd # RUN global.fpu_store_c_fsdsp ... # OK global.fpu_store_c_fsdsp ok 22 global.fpu_store_c_fsdsp # RUN global.gen_sigbus ... [12797.988647] misaligned[618]: unhandled signal 7 code 0x1 at 0x0000000000014dc0 in misaligned[4dc0,10000+76000] [12797.988990] CPU: 0 UID: 0 PID: 618 Comm: misaligned Not tainted 6.13.0-rc6-00008-g4ec4468967c9-dirty #51 [12797.989169] Hardware name: riscv-virtio,qemu (DT) [12797.989264] epc : 0000000000014dc0 ra : 0000000000014d00 sp : 00007fffe165d100 [12797.989407] gp : 000000000008f6e8 tp : 0000000000095760 t0 : 0000000000000008 [12797.989544] t1 : 00000000000965d8 t2 : 000000000008e830 s0 : 00007fffe165d160 [12797.989692] s1 : 000000000000001a a0 : 0000000000000000 a1 : 0000000000000002 [12797.989831] a2 : 0000000000000000 a3 : 0000000000000000 a4 : ffffffffdeadbeef [12797.989964] a5 : 000000000008ef61 a6 : 626769735f6e0000 a7 : fffffffffffff000 [12797.990094] s2 : 0000000000000001 s3 : 00007fffe165d838 s4 : 00007fffe165d848 [12797.990238] s5 : 000000000000001a s6 : 0000000000010442 s7 : 0000000000010200 [12797.990391] s8 : 000000000000003a s9 : 0000000000094508 s10: 0000000000000000 [12797.990526] s11: 0000555567460668 t3 : 00007fffe165d070 t4 : 00000000000965d0 [12797.990656] t5 : fefefefefefefeff t6 : 0000000000000073 [12797.990756] status: 0000000200004020 badaddr: 000000000008ef61 cause: 0000000000000006 [12797.990911] Code: 8793 8791 3423 fcf4 3783 fc84 c737 dead 0713 eef7 (c398) 0001 # OK global.gen_sigbus ok 23 global.gen_sigbus # PASSED: 23 / 23 tests passed. # Totals: pass:23 fail:0 xfail:0 xpass:0 skip:0 error:0 With kvm-tools: # lkvm run -k sbi.flat -m 128 Info: # lkvm run -k sbi.flat -m 128 -c 1 --name guest-97 Info: Removed ghost socket file "/root/.lkvm//guest-97.sock". ########################################################################## # kvm-unit-tests ########################################################################## ... [test messages elided] PASS: sbi: fwft: FWFT extension probing no error PASS: sbi: fwft: get/set reserved feature 0x6 error == SBI_ERR_DENIED PASS: sbi: fwft: get/set reserved feature 0x3fffffff error == SBI_ERR_DENIED PASS: sbi: fwft: get/set reserved feature 0x80000000 error == SBI_ERR_DENIED PASS: sbi: fwft: get/set reserved feature 0xbfffffff error == SBI_ERR_DENIED PASS: sbi: fwft: misaligned_deleg: Get misaligned deleg feature no error PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature invalid value error PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature invalid value error PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value no error PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value 0 PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value no error PASS: sbi: fwft: misaligned_deleg: Set misaligned deleg feature value 1 PASS: sbi: fwft: misaligned_deleg: Verify misaligned load exception trap in supervisor SUMMARY: 50 tests, 2 unexpected failures, 12 skipped This series is available at [5]. Link: https://github.com/riscv-non-isa/riscv-sbi-doc/releases/download/vv3.0-rc2/… [1] Link: https://github.com/rivosinc/qemu/tree/dev/cleger/misaligned [2] Link: https://lore.kernel.org/all/20241211211933.198792-3-fkonrad@amd.com/T/ [3] Link: https://lore.kernel.org/linux-riscv/20250414123543.1615478-1-cleger@rivosin… [4] Link: https://github.com/rivosinc/linux/tree/dev/cleger/fwft [5] --- V7: - Fix ifdefery build problems - Move sbi_fwft_is_supported with fwft_set_req struct - Added Atish Reviewed-by - Updated KVM vcpu cfg hedeleg value in set_delegation - Changed SBI ETIME error mapping to ETIMEDOUT - Fixed a few typo reported by Alok V6: - Rename FWFT interface to remove "_local" - Fix test for MEDELEG values in KVM FWFT support - Add __init for unaligned_access_init() - Rebased on master V5: - Return ERANGE as mapping for SBI_ERR_BAD_RANGE - Removed unused sbi_fwft_get() - Fix kernel for sbi_fwft_local_set_cpumask() - Fix indentation for sbi_fwft_local_set() - Remove spurious space in kvm_sbi_fwft_ops. - Rebased on origin/master - Remove fixes commits and sent them as a separate series [4] V4: - Check SBI version 3.0 instead of 2.0 for FWFT presence - Use long for kvm_sbi_fwft operation return value - Init KVM sbi extension even if default_disabled - Remove revert_on_fail parameter for sbi_fwft_feature_set(). - Fix comments for sbi_fwft_set/get() - Only handle local features (there are no globals yet in the spec) - Add new SBI errors to sbi_err_map_linux_errno() V3: - Added comment about kvm sbi fwft supported/set/get callback requirements - Move struct kvm_sbi_fwft_feature in kvm_sbi_fwft.c - Add a FWFT interface V2: - Added Kselftest for misaligned testing - Added get_user() usage instead of __get_user() - Reenable interrupt when possible in misaligned access handling - Document that riscv supports unaligned-traps - Fix KVM extension state when an init function is present - Rework SBI misaligned accesses trap delegation code - Added support for CPU hotplugging - Added KVM SBI reset callback - Added reset for KVM SBI FWFT lock - Return SBI_ERR_DENIED_LOCKED when LOCK flag is set Clément Léger (14): riscv: sbi: add Firmware Feature (FWFT) SBI extensions definitions riscv: sbi: remove useless parenthesis riscv: sbi: add new SBI error mappings riscv: sbi: add FWFT extension interface riscv: sbi: add SBI FWFT extension calls riscv: misaligned: request misaligned exception from SBI riscv: misaligned: use on_each_cpu() for scalar misaligned access probing riscv: misaligned: use correct CONFIG_ ifdef for misaligned_access_speed riscv: misaligned: move emulated access uniformity check in a function riscv: misaligned: add a function to check misalign trap delegability RISC-V: KVM: add SBI extension init()/deinit() functions RISC-V: KVM: add SBI extension reset callback RISC-V: KVM: add support for FWFT SBI extension RISC-V: KVM: add support for SBI_FWFT_MISALIGNED_DELEG arch/riscv/include/asm/cpufeature.h | 12 +- arch/riscv/include/asm/kvm_host.h | 5 +- arch/riscv/include/asm/kvm_vcpu_sbi.h | 12 + arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h | 29 +++ arch/riscv/include/asm/sbi.h | 60 +++++ arch/riscv/include/uapi/asm/kvm.h | 1 + arch/riscv/kernel/sbi.c | 81 ++++++- arch/riscv/kernel/traps_misaligned.c | 112 ++++++++- arch/riscv/kernel/unaligned_access_speed.c | 8 +- arch/riscv/kvm/Makefile | 1 + arch/riscv/kvm/vcpu.c | 4 +- arch/riscv/kvm/vcpu_sbi.c | 54 +++++ arch/riscv/kvm/vcpu_sbi_fwft.c | 257 +++++++++++++++++++++ arch/riscv/kvm/vcpu_sbi_sta.c | 3 +- 14 files changed, 620 insertions(+), 19 deletions(-) create mode 100644 arch/riscv/include/asm/kvm_vcpu_sbi_fwft.h create mode 100644 arch/riscv/kvm/vcpu_sbi_fwft.c -- 2.49.0

1 month, 1 week

3
19
0 0

[PATCH] kunit: Fix wrong parameter to kunit_deactivate_static_stub()

by Tzung-Bi Shih

kunit_deactivate_static_stub() accepts real_fn_addr instead of replacement_addr. In the case, it always passes NULL to kunit_deactivate_static_stub(). Fix it. Fixes: e047c5eaa763 ("kunit: Expose 'static stub' API to redirect functions") Signed-off-by: Tzung-Bi Shih <tzungbi(a)kernel.org> --- lib/kunit/static_stub.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/kunit/static_stub.c b/lib/kunit/static_stub.c index 92b2cccd5e76..484fd85251b4 100644 --- a/lib/kunit/static_stub.c +++ b/lib/kunit/static_stub.c @@ -96,7 +96,7 @@ void __kunit_activate_static_stub(struct kunit *test, /* If the replacement address is NULL, deactivate the stub. */ if (!replacement_addr) { - kunit_deactivate_static_stub(test, replacement_addr); + kunit_deactivate_static_stub(test, real_fn_addr); return; } -- 2.49.0.1101.gccaa498523-goog

1 month, 1 week

2
2
0 0

[PATCH] kunit: Add test for static stub

by Tzung-Bi Shih

__kunit_activate_static_stub() works effectively as kunit_deactivate_static_stub() if `replacement_addr` is NULL. Add a test case for that. For running the test: $ ./tools/testing/kunit/kunit.py run \ --arch=x86_64 \ kunit_stub Signed-off-by: Tzung-Bi Shih <tzungbi(a)kernel.org> --- lib/kunit/kunit-test.c | 46 +++++++++++++++++++++++++++++++++++++++++- 1 file changed, 45 insertions(+), 1 deletion(-) diff --git a/lib/kunit/kunit-test.c b/lib/kunit/kunit-test.c index d9c781c859fd..f8f567196ca9 100644 --- a/lib/kunit/kunit-test.c +++ b/lib/kunit/kunit-test.c @@ -8,6 +8,7 @@ #include "linux/gfp_types.h" #include <kunit/test.h> #include <kunit/test-bug.h> +#include <kunit/static_stub.h> #include <linux/device.h> #include <kunit/device.h> @@ -868,10 +869,53 @@ static struct kunit_suite kunit_current_test_suite = { .test_cases = kunit_current_test_cases, }; +static void kunit_stub_test(struct kunit *test) +{ + struct kunit fake_test; + const unsigned long fake_real_fn_addr = 0x1234; + const unsigned long fake_replacement_addr = 0x5678; + struct kunit_resource *res; + struct { + void *real_fn_addr; + void *replacement_addr; + } *stub_ctx; + + kunit_init_test(&fake_test, "kunit_stub_fake_test", NULL); + KUNIT_ASSERT_EQ(test, fake_test.status, KUNIT_SUCCESS); + KUNIT_ASSERT_EQ(test, list_count_nodes(&fake_test.resources), 0); + + __kunit_activate_static_stub(&fake_test, (void *)fake_real_fn_addr, + (void *)fake_replacement_addr); + KUNIT_ASSERT_EQ(test, fake_test.status, KUNIT_SUCCESS); + KUNIT_ASSERT_EQ(test, list_count_nodes(&fake_test.resources), 1); + + res = list_first_entry(&fake_test.resources, struct kunit_resource, node); + KUNIT_EXPECT_NOT_NULL(test, res); + + stub_ctx = res->data; + KUNIT_EXPECT_NOT_NULL(test, stub_ctx); + KUNIT_EXPECT_EQ(test, (unsigned long)stub_ctx->real_fn_addr, fake_real_fn_addr); + KUNIT_EXPECT_EQ(test, (unsigned long)stub_ctx->replacement_addr, fake_replacement_addr); + + __kunit_activate_static_stub(&fake_test, (void *)fake_real_fn_addr, NULL); + KUNIT_ASSERT_EQ(test, fake_test.status, KUNIT_SUCCESS); + KUNIT_ASSERT_EQ(test, list_count_nodes(&fake_test.resources), 0); +} + +static struct kunit_case kunit_stub_test_cases[] = { + KUNIT_CASE(kunit_stub_test), + {} +}; + +static struct kunit_suite kunit_stub_test_suite = { + .name = "kunit_stub", + .test_cases = kunit_stub_test_cases, +}; + kunit_test_suites(&kunit_try_catch_test_suite, &kunit_resource_test_suite, &kunit_log_test_suite, &kunit_status_test_suite, &kunit_current_test_suite, &kunit_device_test_suite, - &kunit_fault_test_suite); + &kunit_fault_test_suite, &kunit_stub_test_suite); MODULE_DESCRIPTION("KUnit test for core test infrastructure"); MODULE_LICENSE("GPL v2"); -- 2.49.0.1143.g0be31eac6b-goog

1 month, 1 week

1
0
0 0

[PATCHv6 net-next 0/2] wireguard: selftests: use nftables for testing

by Hangbin Liu

This patch set convert the wireguard selftest to nftables, as iptables is deparated and nftables is the default framework of most releases. v6: fix typo in patch 1/2. Update the description (Phil Sutter) v5: remove the counter in nft rules and link nft statically (Jason A. Donenfeld) v4: no update, just re-send v3: drop iptables directly (Jason A. Donenfeld) Also convert to using nft for qemu testing (Jason A. Donenfeld) v2: use one nft table for testing (Phil Sutter) Hangbin Liu (2): wireguard: selftests: convert iptables to nft wireguard: selftests: update to using nft for qemu test tools/testing/selftests/wireguard/netns.sh | 29 +++++++++------ .../testing/selftests/wireguard/qemu/Makefile | 36 ++++++++++++++----- .../selftests/wireguard/qemu/kernel.config | 7 ++-- 3 files changed, 49 insertions(+), 23 deletions(-) -- 2.46.0

1 month, 1 week

2
5
0 0

[PATCH v3 0/4] Introducing Hornet LSM

by Blaise Boscaccy

This patch series introduces the Hornet LSM. The goal of Hornet is to provide a signature verification mechanism for eBPF programs. eBPF has similar requirements to that of modules when it comes to loading: find symbol addresses, fix up ELF relocations, some struct field offset handling stuff called CO-RE (compile-once run-anywhere), and some other miscellaneous bookkeeping. During eBPF program compilation, pseudo-values get written to the immediate operands of instructions. During loading, those pseudo-values get rewritten with concrete addresses or data applicable to the currently running system, e.g., a kallsyms address or an fd for a map. This needs to happen before the instructions for a bpf program are loaded into the kernel via the bpf() syscall. Unlike modules, an in-kernel loader unfortunately doesn't exist. Typically, the instruction rewriting is done dynamically in userspace via libbpf. Since the relocations and instruction modifications are happening in userspace, and their values may change depending upon the running system, this breaks known signature verification mechanisms. Light skeleton programs were introduced in order to support early loading of eBPF programs along with user-mode drivers. They utilize a separate eBPF program that can load a target eBPF program and perform all necessary relocations in-kernel without needing a working userspace. Light skeletons were mentioned as a possible path forward for signature verification. Hornet takes a simple approach to light-skeleton-based eBPF signature verification. A PKCS#7 signature of a data buffer containing the raw instructions of an eBPF program, followed by the initial values of any maps used by the program is used. A utility script is provided to parse and extract the contents of autogenerated header files created via bpftool. That payload can then be signed and appended to the light skeleton executable. Maps are checked that they are frozen to prevent TOCTOU bugs where a sufficiently privileged user could rewrite map data between the calls to BPF_PROG_LOAD and BPF_PROG_RUN. Additionally, both sparse-array-based and fd_array_cnt-based map fd arrays are supported for signature verification. References: [1] https://lore.kernel.org/bpf/20220209054315.73833-1-alexei.starovoitov@gmail… [2] https://lore.kernel.org/bpf/CAADnVQ+wPK1KKZhCgb-Nnf0Xfjk8M1UpX5fnXC=cBzdEYb… Change list: - v2 -> v3 - Remove any and all usage of proprietary bpf APIs - Add optional systemd/pid1 whitelisting - Minor Makefile cleanup - Fixed buffer leak - Handled null current task - Made magic number required - Defensive checks against invalid buffer signature reads - v1 -> v2 - Jargon clarification, maintainer entry and a few cosmetic fixes Revisions: - v1 https://lore.kernel.org/bpf/20250321164537.16719-1-bboscaccy@linux.microsof… - v2 https://lore.kernel.org/linux-security-module/20250404215527.1563146-1-bbos… Blaise Boscaccy (4): security: Hornet LSM hornet: Introduce sign-ebpf hornet: Add a light skeleton data extractor script selftests/hornet: Add a selftest for the Hornet LSM Documentation/admin-guide/LSM/Hornet.rst | 65 +++ Documentation/admin-guide/LSM/index.rst | 1 + MAINTAINERS | 9 + crypto/asymmetric_keys/pkcs7_verify.c | 10 + include/linux/kernel_read_file.h | 1 + include/linux/verification.h | 1 + include/uapi/linux/lsm.h | 1 + scripts/Makefile | 1 + scripts/hornet/Makefile | 5 + scripts/hornet/extract-skel.sh | 29 ++ scripts/hornet/sign-ebpf.c | 411 ++++++++++++++++++ security/Kconfig | 3 +- security/Makefile | 1 + security/hornet/Kconfig | 24 + security/hornet/Makefile | 4 + security/hornet/hornet_lsm.c | 250 +++++++++++ security/selinux/hooks.c | 12 +- security/selinux/include/classmap.h | 2 +- tools/testing/selftests/Makefile | 1 + tools/testing/selftests/hornet/Makefile | 58 +++ tools/testing/selftests/hornet/fail_loader.sh | 3 + tools/testing/selftests/hornet/frozen_skel.h | 393 +++++++++++++++++ tools/testing/selftests/hornet/loader.c | 22 + tools/testing/selftests/hornet/trivial.bpf.c | 33 ++ 24 files changed, 1336 insertions(+), 4 deletions(-) create mode 100644 Documentation/admin-guide/LSM/Hornet.rst create mode 100644 scripts/hornet/Makefile create mode 100755 scripts/hornet/extract-skel.sh create mode 100644 scripts/hornet/sign-ebpf.c create mode 100644 security/hornet/Kconfig create mode 100644 security/hornet/Makefile create mode 100644 security/hornet/hornet_lsm.c create mode 100644 tools/testing/selftests/hornet/Makefile create mode 100755 tools/testing/selftests/hornet/fail_loader.sh create mode 100644 tools/testing/selftests/hornet/frozen_skel.h create mode 100644 tools/testing/selftests/hornet/loader.c create mode 100644 tools/testing/selftests/hornet/trivial.bpf.c -- 2.48.1

1 month, 1 week

7
40
0 0

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