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// 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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <libfdt.h>
#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();
}
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