From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- 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