From 4352b8aee98005853aa63f57d6377282de17a33f Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sun, 23 Aug 2026 13:28:57 -0700 Subject: Merge tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux Pull I3C updates from Alexandre Belloni: "A new driver this cycle, for the AMD AXI I3C controller. There are also new features such as IBI wakeup support, SETAASA device discovery and ACPI support for the the DAA methods, meaning we can now communicate with the SPD devices on DDR5 modules. New driver: - AMD AXI I3C master controller Subsystem: - I3C Common Command Code (CCC) handling improvements, especially around GET CCCs - SETAASA device discovery support - ACPI support for all existing DAA methods like SETDASA, SETNEWDA as well as I2C devices on I3C bus - IBI-based wakeup support Drivers: - dw: SETAASA support - mipi-i3c-hci: advertise IBI wakeup capability, AMD_PT I3C controller support, PIO queue management support for HCI v1.2 - renesas: improve suspend to RAM support, add runtime PM support" * tag 'i3c/for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/i3c/linux: (70 commits) i3c: dw: reduce do_daa time if there's no client i3c: mipi-i3c-hci: Add support for AMD_PT I3C controller i3c: mipi-i3c-hci: Add PIO queue management support for HCI v1.2 i3c: mipi-i3c-hci: Fix missing STAT_IBI_STATUS_THLD in PIO mode i3c: dw: rename "pclk" to "apb" to match dt-binding i3c: dw: make struct dw_i3c_cmd smaller i3c: dw: use COMMAND_PORT_TRANSFER_ARG instead of hardcoding i3c: renesas: Don't register devices when ENTDAA times out i3c: master: dw-i3c-master: fix OD timing for first broadcast i3c: mipi-i3c-hci: Advertise IBI wakeup capability i3c: mipi-i3c-hci: Factor out i3c_hci_sysdev() i3c: mipi-i3c-hci-pci: Propagate I3C wakeup requirements to PCI i3c: master: Reject IBI requests from non-IBI-capable devices i3c: master: Add helper to query bus wakeup requirements i3c: master: Report wakeup events for IBIs i3c: master: Support IBI-based wakeup capability i3c: master: Fix potential UAF in i3c_device_match() i3c: master: Fix potential UAF in i3c_device_uevent() i3c: Make dev->desc locking assumptions explicit i3c: master: Fix use-after-free of master->this ... --- tools/perf/tests/kallsyms-split.c | 160 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 160 insertions(+) create mode 100644 tools/perf/tests/kallsyms-split.c (limited to 'tools/perf/tests/kallsyms-split.c') diff --git a/tools/perf/tests/kallsyms-split.c b/tools/perf/tests/kallsyms-split.c new file mode 100644 index 000000000..244daa01b --- /dev/null +++ b/tools/perf/tests/kallsyms-split.c @@ -0,0 +1,160 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include +#include "util/dso.h" +#include "util/map.h" +#include "util/symbol.h" +#include "util/debug.h" +#include "util/machine.h" +#include "tests.h" + +/* + * This test is to check whether a bad symbol in a module won't split kallsyms maps. + * The main_symbol[1-3] should belong to the main [kernel.kallsyms] map even if the + * bad_symbol from the module is found in the middle. + */ +static char root_template[] = "/tmp/perf-test.XXXXXX"; +static char *root_dir; + +static const char proc_version[] = "Linux version X.Y.Z (just for perf test)\n"; +static const char proc_modules[] = "module 4096 1 - Live 0xffffffffcd000000\n"; +static const char proc_kallsyms[] = + "ffffffffab200000 T _stext\n" + "ffffffffab200010 T good_symbol\n" + "ffffffffab200020 t bad_symbol\n" + "ffffffffab200030 t main_symbol1\n" + "ffffffffab200040 t main_symbol2\n" + "ffffffffab200050 t main_symbol3\n" + "ffffffffab200060 T _etext\n" + "ffffffffcd000000 T start_module\t[module]\n" + "ffffffffab200020 u bad_symbol\t[module]\n" + "ffffffffcd000040 T end_module\t[module]\n"; + +static struct { + const char *name; + const char *contents; + long len; +} proc_files[] = { + { "version", proc_version, sizeof(proc_version) - 1 }, + { "modules", proc_modules, sizeof(proc_modules) - 1 }, + { "kallsyms", proc_kallsyms, sizeof(proc_kallsyms) - 1 }, +}; + +static void remove_proc_dir(int sig __maybe_unused) +{ + char buf[128]; + + if (root_dir == NULL) + return; + + for (unsigned i = 0; i < ARRAY_SIZE(proc_files); i++) { + scnprintf(buf, sizeof(buf), "%s/proc/%s", root_dir, proc_files[i].name); + remove(buf); + } + + scnprintf(buf, sizeof(buf), "%s/proc", root_dir); + rmdir(buf); + + rmdir(root_dir); + root_dir = NULL; +} + +static int create_proc_dir(void) +{ + char buf[128]; + + root_dir = mkdtemp(root_template); + if (root_dir == NULL) + return -1; + + scnprintf(buf, sizeof(buf), "%s/proc", root_dir); + if (mkdir(buf, 0700) < 0) + goto err; + + for (unsigned i = 0; i < ARRAY_SIZE(proc_files); i++) { + int fd, len; + + scnprintf(buf, sizeof(buf), "%s/proc/%s", root_dir, proc_files[i].name); + fd = open(buf, O_RDWR | O_CREAT, 0600); + if (fd < 0) + goto err; + + len = write(fd, proc_files[i].contents, proc_files[i].len); + close(fd); + if (len != proc_files[i].len) + goto err; + } + return 0; + +err: + remove_proc_dir(0); + return -1; +} + +static int test__kallsyms_split(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) +{ + struct machine m = { 0 }; + struct map *map = NULL; + int ret = TEST_FAIL; + + pr_debug("try to create fake root directory\n"); + if (create_proc_dir() < 0) { + pr_debug("SKIP: cannot create a fake root directory\n"); + return TEST_SKIP; + } + + signal(SIGINT, remove_proc_dir); + signal(SIGPIPE, remove_proc_dir); + signal(SIGSEGV, remove_proc_dir); + signal(SIGTERM, remove_proc_dir); + + pr_debug("create kernel maps from the fake root directory\n"); + if (machine__init(&m, root_dir, HOST_KERNEL_ID)) { + pr_debug("FAIL: failed to init machine\n"); + goto out; + } + if (machine__create_kernel_maps(&m) < 0) { + pr_debug("FAIL: failed to create kernel maps\n"); + goto out; + } + + /* force to use /proc/kallsyms */ + symbol_conf.ignore_vmlinux = true; + symbol_conf.ignore_vmlinux_buildid = true; + symbol_conf.allow_aliases = true; + + if (map__load(machine__kernel_map(&m)) < 0) { + pr_debug("FAIL: failed to load kallsyms\n"); + goto out; + } + + pr_debug("kernel map loaded - check symbol and map\n"); + if (maps__nr_maps(machine__kernel_maps(&m)) != 2) { + pr_debug("FAIL: it should have the kernel and a module, but has %u maps\n", + maps__nr_maps(machine__kernel_maps(&m))); + goto out; + } + + if (machine__find_kernel_symbol_by_name(&m, "main_symbol3", &map) == NULL) { + pr_debug("FAIL: failed to find a symbol\n"); + goto out; + } + + if (!RC_CHK_EQUAL(map, machine__kernel_map(&m))) { + pr_debug("FAIL: the symbol is not in the kernel map\n"); + goto out; + } + ret = TEST_OK; + +out: + map__put(map); + remove_proc_dir(0); + machine__exit(&m); + return ret; +} + +DEFINE_SUITE("split kallsyms", kallsyms_split); -- cgit v1.3.1