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make allmodconfig && make W=1 C=1 reports: WARNING: modpost: missing MODULE_DESCRIPTION() in lib/string_kunit.o WARNING: modpost: missing MODULE_DESCRIPTION() in lib/string_helpers_kunit.o Add the missing invocation of the MODULE_DESCRIPTION() macro. Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com> Link: https://lore.kernel.org/r/20240531-md-lib-string-v1-1-2738cf057d94@quicinc.com Signed-off-by: Kees Cook <kees@kernel.org>
629 lines
16 KiB
C
629 lines
16 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
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/*
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* Test cases for lib/string_helpers.c module.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <kunit/test.h>
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#include <linux/array_size.h>
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#include <linux/kernel.h>
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#include <linux/random.h>
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#include <linux/string.h>
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#include <linux/string_helpers.h>
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static void test_string_check_buf(struct kunit *test,
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const char *name, unsigned int flags,
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char *in, size_t p,
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char *out_real, size_t q_real,
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char *out_test, size_t q_test)
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{
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KUNIT_ASSERT_EQ_MSG(test, q_real, q_test, "name:%s", name);
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KUNIT_EXPECT_MEMEQ_MSG(test, out_test, out_real, q_test,
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"name:%s", name);
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}
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struct test_string {
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const char *in;
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const char *out;
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unsigned int flags;
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};
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static const struct test_string strings[] = {
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{
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.in = "\\f\\ \\n\\r\\t\\v",
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.out = "\f\\ \n\r\t\v",
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.flags = UNESCAPE_SPACE,
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},
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{
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.in = "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777",
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.out = " \001\00387\0064\005 \\8aH?7",
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.flags = UNESCAPE_OCTAL,
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},
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{
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.in = "\\xv\\xa\\x2c\\xD\\x6f2",
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.out = "\\xv\n,\ro2",
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.flags = UNESCAPE_HEX,
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},
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{
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.in = "\\h\\\\\\\"\\a\\e\\",
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.out = "\\h\\\"\a\e\\",
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.flags = UNESCAPE_SPECIAL,
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},
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};
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static void test_string_unescape(struct kunit *test,
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const char *name, unsigned int flags,
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bool inplace)
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{
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int q_real = 256;
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char *in = kunit_kzalloc(test, q_real, GFP_KERNEL);
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char *out_test = kunit_kzalloc(test, q_real, GFP_KERNEL);
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char *out_real = kunit_kzalloc(test, q_real, GFP_KERNEL);
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int i, p = 0, q_test = 0;
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, in);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, out_test);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, out_real);
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for (i = 0; i < ARRAY_SIZE(strings); i++) {
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const char *s = strings[i].in;
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int len = strlen(strings[i].in);
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/* Copy string to in buffer */
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memcpy(&in[p], s, len);
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p += len;
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/* Copy expected result for given flags */
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if (flags & strings[i].flags) {
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s = strings[i].out;
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len = strlen(strings[i].out);
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}
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memcpy(&out_test[q_test], s, len);
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q_test += len;
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}
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in[p++] = '\0';
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/* Call string_unescape and compare result */
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if (inplace) {
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memcpy(out_real, in, p);
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if (flags == UNESCAPE_ANY)
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q_real = string_unescape_any_inplace(out_real);
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else
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q_real = string_unescape_inplace(out_real, flags);
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} else if (flags == UNESCAPE_ANY) {
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q_real = string_unescape_any(in, out_real, q_real);
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} else {
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q_real = string_unescape(in, out_real, q_real, flags);
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}
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test_string_check_buf(test, name, flags, in, p - 1, out_real, q_real,
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out_test, q_test);
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}
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struct test_string_1 {
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const char *out;
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unsigned int flags;
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};
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#define TEST_STRING_2_MAX_S1 32
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struct test_string_2 {
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const char *in;
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struct test_string_1 s1[TEST_STRING_2_MAX_S1];
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};
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#define TEST_STRING_2_DICT_0 NULL
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static const struct test_string_2 escape0[] = {{
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.in = "\f\\ \n\r\t\v",
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.s1 = {{
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.out = "\\f\\ \\n\\r\\t\\v",
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.flags = ESCAPE_SPACE,
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},{
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.out = "\\f\\134\\040\\n\\r\\t\\v",
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.flags = ESCAPE_SPACE | ESCAPE_OCTAL,
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},{
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.out = "\\f\\x5c\\x20\\n\\r\\t\\v",
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.flags = ESCAPE_SPACE | ESCAPE_HEX,
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},{
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/* terminator */
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}}
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},{
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.in = "\\h\\\"\a\e\\",
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.s1 = {{
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.out = "\\\\h\\\\\\\"\\a\\e\\\\",
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.flags = ESCAPE_SPECIAL,
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},{
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.out = "\\\\\\150\\\\\\\"\\a\\e\\\\",
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.flags = ESCAPE_SPECIAL | ESCAPE_OCTAL,
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},{
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.out = "\\\\\\x68\\\\\\\"\\a\\e\\\\",
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.flags = ESCAPE_SPECIAL | ESCAPE_HEX,
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},{
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/* terminator */
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}}
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},{
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.in = "\eb \\C\007\"\x90\r]",
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.s1 = {{
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.out = "\eb \\C\007\"\x90\\r]",
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.flags = ESCAPE_SPACE,
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},{
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.out = "\\eb \\\\C\\a\\\"\x90\r]",
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.flags = ESCAPE_SPECIAL,
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},{
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.out = "\\eb \\\\C\\a\\\"\x90\\r]",
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.flags = ESCAPE_SPACE | ESCAPE_SPECIAL,
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},{
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.out = "\\033\\142\\040\\134\\103\\007\\042\\220\\015\\135",
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.flags = ESCAPE_OCTAL,
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},{
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.out = "\\033\\142\\040\\134\\103\\007\\042\\220\\r\\135",
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.flags = ESCAPE_SPACE | ESCAPE_OCTAL,
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},{
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.out = "\\e\\142\\040\\\\\\103\\a\\\"\\220\\015\\135",
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.flags = ESCAPE_SPECIAL | ESCAPE_OCTAL,
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},{
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.out = "\\e\\142\\040\\\\\\103\\a\\\"\\220\\r\\135",
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.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_OCTAL,
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},{
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.out = "\eb \\C\007\"\x90\r]",
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.flags = ESCAPE_NP,
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},{
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.out = "\eb \\C\007\"\x90\\r]",
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.flags = ESCAPE_SPACE | ESCAPE_NP,
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},{
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.out = "\\eb \\C\\a\"\x90\r]",
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.flags = ESCAPE_SPECIAL | ESCAPE_NP,
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},{
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.out = "\\eb \\C\\a\"\x90\\r]",
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.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NP,
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},{
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.out = "\\033b \\C\\007\"\\220\\015]",
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.flags = ESCAPE_OCTAL | ESCAPE_NP,
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},{
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.out = "\\033b \\C\\007\"\\220\\r]",
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.flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NP,
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},{
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.out = "\\eb \\C\\a\"\\220\\r]",
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.flags = ESCAPE_SPECIAL | ESCAPE_SPACE | ESCAPE_OCTAL |
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ESCAPE_NP,
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},{
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.out = "\\x1bb \\C\\x07\"\\x90\\x0d]",
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.flags = ESCAPE_NP | ESCAPE_HEX,
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},{
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/* terminator */
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}}
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},{
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.in = "\007 \eb\"\x90\xCF\r",
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.s1 = {{
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.out = "\007 \eb\"\\220\\317\r",
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.flags = ESCAPE_OCTAL | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\\x90\\xcf\r",
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.flags = ESCAPE_HEX | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\xCF\r",
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.flags = ESCAPE_NA,
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},{
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/* terminator */
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}}
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},{
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/* terminator */
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}};
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#define TEST_STRING_2_DICT_1 "b\\ \t\r\xCF"
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static const struct test_string_2 escape1[] = {{
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.in = "\f\\ \n\r\t\v",
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.s1 = {{
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.out = "\f\\134\\040\n\\015\\011\v",
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.flags = ESCAPE_OCTAL,
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},{
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.out = "\f\\x5c\\x20\n\\x0d\\x09\v",
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.flags = ESCAPE_HEX,
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},{
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.out = "\f\\134\\040\n\\015\\011\v",
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.flags = ESCAPE_ANY | ESCAPE_APPEND,
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},{
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.out = "\\014\\134\\040\\012\\015\\011\\013",
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.flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NAP,
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},{
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.out = "\\x0c\\x5c\\x20\\x0a\\x0d\\x09\\x0b",
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.flags = ESCAPE_HEX | ESCAPE_APPEND | ESCAPE_NAP,
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},{
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.out = "\f\\134\\040\n\\015\\011\v",
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.flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NA,
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},{
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.out = "\f\\x5c\\x20\n\\x0d\\x09\v",
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.flags = ESCAPE_HEX | ESCAPE_APPEND | ESCAPE_NA,
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},{
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/* terminator */
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}}
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},{
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.in = "\\h\\\"\a\xCF\e\\",
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.s1 = {{
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.out = "\\134h\\134\"\a\\317\e\\134",
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.flags = ESCAPE_OCTAL,
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},{
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.out = "\\134h\\134\"\a\\317\e\\134",
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.flags = ESCAPE_ANY | ESCAPE_APPEND,
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},{
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.out = "\\134h\\134\"\\007\\317\\033\\134",
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.flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NAP,
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},{
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.out = "\\134h\\134\"\a\\317\e\\134",
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.flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NA,
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},{
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/* terminator */
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}}
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},{
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.in = "\eb \\C\007\"\x90\r]",
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.s1 = {{
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.out = "\e\\142\\040\\134C\007\"\x90\\015]",
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.flags = ESCAPE_OCTAL,
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},{
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/* terminator */
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}}
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},{
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.in = "\007 \eb\"\x90\xCF\r",
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.s1 = {{
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.out = "\007 \eb\"\x90\xCF\r",
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.flags = ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\xCF\r",
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.flags = ESCAPE_SPACE | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\xCF\r",
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.flags = ESCAPE_SPECIAL | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\xCF\r",
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.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\\317\r",
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.flags = ESCAPE_OCTAL | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\\317\r",
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.flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\\317\r",
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.flags = ESCAPE_SPECIAL | ESCAPE_OCTAL | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\\317\r",
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.flags = ESCAPE_ANY | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\\xcf\r",
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.flags = ESCAPE_HEX | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\\xcf\r",
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.flags = ESCAPE_SPACE | ESCAPE_HEX | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\\xcf\r",
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.flags = ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NA,
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},{
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.out = "\007 \eb\"\x90\\xcf\r",
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.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NA,
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},{
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/* terminator */
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}}
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},{
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.in = "\007 \eb\"\x90\xCF\r",
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.s1 = {{
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.out = "\007 \eb\"\x90\xCF\r",
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.flags = ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\xCF\\r",
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.flags = ESCAPE_SPACE | ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\xCF\r",
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.flags = ESCAPE_SPECIAL | ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\xCF\\r",
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.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\\317\\015",
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.flags = ESCAPE_OCTAL | ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\\317\\r",
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.flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\\317\\015",
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.flags = ESCAPE_SPECIAL | ESCAPE_OCTAL | ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\\317\r",
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.flags = ESCAPE_ANY | ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\\xcf\\x0d",
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.flags = ESCAPE_HEX | ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\\xcf\\r",
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.flags = ESCAPE_SPACE | ESCAPE_HEX | ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\\xcf\\x0d",
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.flags = ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NAP,
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},{
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.out = "\007 \eb\"\x90\\xcf\\r",
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.flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NAP,
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},{
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/* terminator */
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}}
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},{
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/* terminator */
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}};
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static const struct test_string strings_upper[] = {
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{
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.in = "abcdefgh1234567890test",
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.out = "ABCDEFGH1234567890TEST",
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},
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{
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.in = "abCdeFgH1234567890TesT",
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.out = "ABCDEFGH1234567890TEST",
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},
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};
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static const struct test_string strings_lower[] = {
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{
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.in = "ABCDEFGH1234567890TEST",
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.out = "abcdefgh1234567890test",
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},
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{
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.in = "abCdeFgH1234567890TesT",
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.out = "abcdefgh1234567890test",
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},
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};
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static const char *test_string_find_match(const struct test_string_2 *s2,
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unsigned int flags)
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{
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const struct test_string_1 *s1 = s2->s1;
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unsigned int i;
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if (!flags)
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return s2->in;
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/* Test cases are NULL-aware */
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flags &= ~ESCAPE_NULL;
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/* ESCAPE_OCTAL has a higher priority */
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if (flags & ESCAPE_OCTAL)
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flags &= ~ESCAPE_HEX;
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for (i = 0; i < TEST_STRING_2_MAX_S1 && s1->out; i++, s1++)
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if (s1->flags == flags)
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return s1->out;
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return NULL;
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}
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static void
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test_string_escape_overflow(struct kunit *test,
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const char *in, int p, unsigned int flags, const char *esc,
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int q_test, const char *name)
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{
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int q_real;
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q_real = string_escape_mem(in, p, NULL, 0, flags, esc);
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KUNIT_EXPECT_EQ_MSG(test, q_real, q_test, "name:%s: flags:%#x", name, flags);
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}
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static void test_string_escape(struct kunit *test, const char *name,
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const struct test_string_2 *s2,
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unsigned int flags, const char *esc)
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{
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size_t out_size = 512;
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char *out_test = kunit_kzalloc(test, out_size, GFP_KERNEL);
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char *out_real = kunit_kzalloc(test, out_size, GFP_KERNEL);
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char *in = kunit_kzalloc(test, 256, GFP_KERNEL);
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int p = 0, q_test = 0;
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int q_real;
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, out_test);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, out_real);
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, in);
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for (; s2->in; s2++) {
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const char *out;
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int len;
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/* NULL injection */
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if (flags & ESCAPE_NULL) {
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in[p++] = '\0';
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/* '\0' passes isascii() test */
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if (flags & ESCAPE_NA && !(flags & ESCAPE_APPEND && esc)) {
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out_test[q_test++] = '\0';
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} else {
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out_test[q_test++] = '\\';
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out_test[q_test++] = '0';
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}
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}
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/* Don't try strings that have no output */
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out = test_string_find_match(s2, flags);
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if (!out)
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continue;
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/* Copy string to in buffer */
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len = strlen(s2->in);
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memcpy(&in[p], s2->in, len);
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p += len;
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/* Copy expected result for given flags */
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len = strlen(out);
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memcpy(&out_test[q_test], out, len);
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q_test += len;
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}
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q_real = string_escape_mem(in, p, out_real, out_size, flags, esc);
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test_string_check_buf(test, name, flags, in, p, out_real, q_real, out_test,
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q_test);
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test_string_escape_overflow(test, in, p, flags, esc, q_test, name);
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}
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#define string_get_size_maxbuf 16
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#define test_string_get_size_one(size, blk_size, exp_result10, exp_result2) \
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do { \
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BUILD_BUG_ON(sizeof(exp_result10) >= string_get_size_maxbuf); \
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BUILD_BUG_ON(sizeof(exp_result2) >= string_get_size_maxbuf); \
|
|
__test_string_get_size(test, (size), (blk_size), (exp_result10), \
|
|
(exp_result2)); \
|
|
} while (0)
|
|
|
|
|
|
static void test_string_get_size_check(struct kunit *test,
|
|
const char *units,
|
|
const char *exp,
|
|
char *res,
|
|
const u64 size,
|
|
const u64 blk_size)
|
|
{
|
|
KUNIT_EXPECT_MEMEQ_MSG(test, res, exp, strlen(exp) + 1,
|
|
"string_get_size(size = %llu, blk_size = %llu, units = %s)",
|
|
size, blk_size, units);
|
|
}
|
|
|
|
static void __strchrcut(char *dst, const char *src, const char *cut)
|
|
{
|
|
const char *from = src;
|
|
size_t len;
|
|
|
|
do {
|
|
len = strcspn(from, cut);
|
|
memcpy(dst, from, len);
|
|
dst += len;
|
|
from += len;
|
|
} while (*from++);
|
|
*dst = '\0';
|
|
}
|
|
|
|
static void __test_string_get_size_one(struct kunit *test,
|
|
const u64 size, const u64 blk_size,
|
|
const char *exp_result10,
|
|
const char *exp_result2,
|
|
enum string_size_units units,
|
|
const char *cut)
|
|
{
|
|
char buf10[string_get_size_maxbuf];
|
|
char buf2[string_get_size_maxbuf];
|
|
char exp10[string_get_size_maxbuf];
|
|
char exp2[string_get_size_maxbuf];
|
|
char prefix10[64];
|
|
char prefix2[64];
|
|
|
|
sprintf(prefix10, "STRING_UNITS_10 [%s]", cut);
|
|
sprintf(prefix2, "STRING_UNITS_2 [%s]", cut);
|
|
|
|
__strchrcut(exp10, exp_result10, cut);
|
|
__strchrcut(exp2, exp_result2, cut);
|
|
|
|
string_get_size(size, blk_size, STRING_UNITS_10 | units, buf10, sizeof(buf10));
|
|
string_get_size(size, blk_size, STRING_UNITS_2 | units, buf2, sizeof(buf2));
|
|
|
|
test_string_get_size_check(test, prefix10, exp10, buf10, size, blk_size);
|
|
test_string_get_size_check(test, prefix2, exp2, buf2, size, blk_size);
|
|
}
|
|
|
|
static void __test_string_get_size(struct kunit *test,
|
|
const u64 size, const u64 blk_size,
|
|
const char *exp_result10,
|
|
const char *exp_result2)
|
|
{
|
|
struct {
|
|
enum string_size_units units;
|
|
const char *cut;
|
|
} get_size_test_cases[] = {
|
|
{ 0, "" },
|
|
{ STRING_UNITS_NO_SPACE, " " },
|
|
{ STRING_UNITS_NO_SPACE | STRING_UNITS_NO_BYTES, " B" },
|
|
{ STRING_UNITS_NO_BYTES, "B" },
|
|
};
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(get_size_test_cases); i++)
|
|
__test_string_get_size_one(test, size, blk_size,
|
|
exp_result10, exp_result2,
|
|
get_size_test_cases[i].units,
|
|
get_size_test_cases[i].cut);
|
|
}
|
|
|
|
static void test_get_size(struct kunit *test)
|
|
{
|
|
/* small values */
|
|
test_string_get_size_one(0, 512, "0 B", "0 B");
|
|
test_string_get_size_one(1, 512, "512 B", "512 B");
|
|
test_string_get_size_one(1100, 1, "1.10 kB", "1.07 KiB");
|
|
|
|
/* normal values */
|
|
test_string_get_size_one(16384, 512, "8.39 MB", "8.00 MiB");
|
|
test_string_get_size_one(500118192, 512, "256 GB", "238 GiB");
|
|
test_string_get_size_one(8192, 4096, "33.6 MB", "32.0 MiB");
|
|
|
|
/* weird block sizes */
|
|
test_string_get_size_one(3000, 1900, "5.70 MB", "5.44 MiB");
|
|
|
|
/* huge values */
|
|
test_string_get_size_one(U64_MAX, 4096, "75.6 ZB", "64.0 ZiB");
|
|
test_string_get_size_one(4096, U64_MAX, "75.6 ZB", "64.0 ZiB");
|
|
}
|
|
|
|
static void test_upper_lower(struct kunit *test)
|
|
{
|
|
char *dst;
|
|
int i;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(strings_upper); i++) {
|
|
const char *s = strings_upper[i].in;
|
|
int len = strlen(strings_upper[i].in) + 1;
|
|
|
|
dst = kmalloc(len, GFP_KERNEL);
|
|
KUNIT_ASSERT_NOT_NULL(test, dst);
|
|
|
|
string_upper(dst, s);
|
|
KUNIT_EXPECT_STREQ(test, dst, strings_upper[i].out);
|
|
kfree(dst);
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(strings_lower); i++) {
|
|
const char *s = strings_lower[i].in;
|
|
int len = strlen(strings_lower[i].in) + 1;
|
|
|
|
dst = kmalloc(len, GFP_KERNEL);
|
|
KUNIT_ASSERT_NOT_NULL(test, dst);
|
|
|
|
string_lower(dst, s);
|
|
KUNIT_EXPECT_STREQ(test, dst, strings_lower[i].out);
|
|
kfree(dst);
|
|
}
|
|
}
|
|
|
|
static void test_unescape(struct kunit *test)
|
|
{
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < UNESCAPE_ALL_MASK + 1; i++)
|
|
test_string_unescape(test, "unescape", i, false);
|
|
test_string_unescape(test, "unescape inplace",
|
|
get_random_u32_below(UNESCAPE_ALL_MASK + 1), true);
|
|
|
|
/* Without dictionary */
|
|
for (i = 0; i < ESCAPE_ALL_MASK + 1; i++)
|
|
test_string_escape(test, "escape 0", escape0, i, TEST_STRING_2_DICT_0);
|
|
|
|
/* With dictionary */
|
|
for (i = 0; i < ESCAPE_ALL_MASK + 1; i++)
|
|
test_string_escape(test, "escape 1", escape1, i, TEST_STRING_2_DICT_1);
|
|
}
|
|
|
|
static struct kunit_case string_helpers_test_cases[] = {
|
|
KUNIT_CASE(test_get_size),
|
|
KUNIT_CASE(test_upper_lower),
|
|
KUNIT_CASE(test_unescape),
|
|
{}
|
|
};
|
|
|
|
static struct kunit_suite string_helpers_test_suite = {
|
|
.name = "string_helpers",
|
|
.test_cases = string_helpers_test_cases,
|
|
};
|
|
|
|
kunit_test_suites(&string_helpers_test_suite);
|
|
|
|
MODULE_DESCRIPTION("Test cases for string helpers module");
|
|
MODULE_LICENSE("Dual BSD/GPL");
|