/* $NetBSD: truncated_string.c,v 1.1.1.1 2019/12/22 12:34:06 skrll Exp $ */ // SPDX-License-Identifier: LGPL-2.1-or-later /* * libfdt - Flat Device Tree manipulation * Testcase for misbehaviour on a truncated string * Copyright (C) 2018 David Gibson, IBM Corporation. */ #include #include #include #include #include #include "tests.h" #include "testdata.h" int main(int argc, char *argv[]) { void *fdt = &truncated_string; const struct fdt_property *good, *bad; int off, len; const char *name; test_init(argc, argv); vg_prepare_blob(fdt, fdt_totalsize(fdt)); off = fdt_first_property_offset(fdt, 0); good = fdt_get_property_by_offset(fdt, off, NULL); off = fdt_next_property_offset(fdt, off); bad = fdt_get_property_by_offset(fdt, off, NULL); if (fdt32_to_cpu(good->len) != 0) FAIL("Unexpected length for good property"); name = fdt_get_string(fdt, fdt32_to_cpu(good->nameoff), &len); if (!name) FAIL("fdt_get_string() failed on good property: %s", fdt_strerror(len)); if (len != 4) FAIL("fdt_get_string() returned length %d (not 4) on good property", len); if (!streq(name, "good")) FAIL("fdt_get_string() returned \"%s\" (not \"good\") on good property", name); if (fdt32_to_cpu(bad->len) != 0) FAIL("Unexpected length for bad property\n"); name = fdt_get_string(fdt, fdt32_to_cpu(bad->nameoff), &len); if (name) FAIL("fdt_get_string() succeeded incorrectly on bad property"); else if (len != -FDT_ERR_TRUNCATED) FAIL("fdt_get_string() gave unexpected error on bad property: %s", fdt_strerror(len)); /* Make sure the 'good' property breaks correctly if we * truncate the strings section */ fdt_set_size_dt_strings(fdt, fdt32_to_cpu(good->nameoff) + 4); name = fdt_get_string(fdt, fdt32_to_cpu(good->nameoff), &len); if (name) FAIL("fdt_get_string() succeeded incorrectly on mangled property"); else if (len != -FDT_ERR_TRUNCATED) FAIL("fdt_get_string() gave unexpected error on mangled property: %s", fdt_strerror(len)); PASS(); }