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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Test cases for printf facility.4 */5 6#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt7 8#include <linux/init.h>9#include <linux/kernel.h>10#include <linux/module.h>11#include <linux/printk.h>12#include <linux/random.h>13#include <linux/rtc.h>14#include <linux/slab.h>15#include <linux/sprintf.h>16#include <linux/string.h>17 18#include <linux/bitmap.h>19#include <linux/dcache.h>20#include <linux/socket.h>21#include <linux/in.h>22 23#include <linux/gfp.h>24#include <linux/mm.h>25 26#include <linux/property.h>27 28#include "../tools/testing/selftests/kselftest_module.h"29 30#define BUF_SIZE 25631#define PAD_SIZE 1632#define FILL_CHAR '$'33 34#define NOWARN(option, comment, block) \35 __diag_push(); \36 __diag_ignore_all(#option, comment); \37 block \38 __diag_pop();39 40KSTM_MODULE_GLOBALS();41 42static char *test_buffer __initdata;43static char *alloced_buffer __initdata;44 45static int __printf(4, 0) __init46do_test(int bufsize, const char *expect, int elen,47 const char *fmt, va_list ap)48{49 va_list aq;50 int ret, written;51 52 total_tests++;53 54 memset(alloced_buffer, FILL_CHAR, BUF_SIZE + 2*PAD_SIZE);55 va_copy(aq, ap);56 ret = vsnprintf(test_buffer, bufsize, fmt, aq);57 va_end(aq);58 59 if (ret != elen) {60 pr_warn("vsnprintf(buf, %d, \"%s\", ...) returned %d, expected %d\n",61 bufsize, fmt, ret, elen);62 return 1;63 }64 65 if (memchr_inv(alloced_buffer, FILL_CHAR, PAD_SIZE)) {66 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote before buffer\n", bufsize, fmt);67 return 1;68 }69 70 if (!bufsize) {71 if (memchr_inv(test_buffer, FILL_CHAR, BUF_SIZE + PAD_SIZE)) {72 pr_warn("vsnprintf(buf, 0, \"%s\", ...) wrote to buffer\n",73 fmt);74 return 1;75 }76 return 0;77 }78 79 written = min(bufsize-1, elen);80 if (test_buffer[written]) {81 pr_warn("vsnprintf(buf, %d, \"%s\", ...) did not nul-terminate buffer\n",82 bufsize, fmt);83 return 1;84 }85 86 if (memchr_inv(test_buffer + written + 1, FILL_CHAR, bufsize - (written + 1))) {87 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond the nul-terminator\n",88 bufsize, fmt);89 return 1;90 }91 92 if (memchr_inv(test_buffer + bufsize, FILL_CHAR, BUF_SIZE + PAD_SIZE - bufsize)) {93 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote beyond buffer\n", bufsize, fmt);94 return 1;95 }96 97 if (memcmp(test_buffer, expect, written)) {98 pr_warn("vsnprintf(buf, %d, \"%s\", ...) wrote '%s', expected '%.*s'\n",99 bufsize, fmt, test_buffer, written, expect);100 return 1;101 }102 return 0;103}104 105static void __printf(3, 4) __init106__test(const char *expect, int elen, const char *fmt, ...)107{108 va_list ap;109 int rand;110 char *p;111 112 if (elen >= BUF_SIZE) {113 pr_err("error in test suite: expected output length %d too long. Format was '%s'.\n",114 elen, fmt);115 failed_tests++;116 return;117 }118 119 va_start(ap, fmt);120 121 /*122 * Every fmt+args is subjected to four tests: Three where we123 * tell vsnprintf varying buffer sizes (plenty, not quite124 * enough and 0), and then we also test that kvasprintf would125 * be able to print it as expected.126 */127 failed_tests += do_test(BUF_SIZE, expect, elen, fmt, ap);128 rand = get_random_u32_inclusive(1, elen + 1);129 /* Since elen < BUF_SIZE, we have 1 <= rand <= BUF_SIZE. */130 failed_tests += do_test(rand, expect, elen, fmt, ap);131 failed_tests += do_test(0, expect, elen, fmt, ap);132 133 p = kvasprintf(GFP_KERNEL, fmt, ap);134 if (p) {135 total_tests++;136 if (memcmp(p, expect, elen+1)) {137 pr_warn("kvasprintf(..., \"%s\", ...) returned '%s', expected '%s'\n",138 fmt, p, expect);139 failed_tests++;140 }141 kfree(p);142 }143 va_end(ap);144}145 146#define test(expect, fmt, ...) \147 __test(expect, strlen(expect), fmt, ##__VA_ARGS__)148 149static void __init150test_basic(void)151{152 /* Work around annoying "warning: zero-length gnu_printf format string". */153 char nul = '\0';154 155 test("", &nul);156 test("100%", "100%%");157 test("xxx%yyy", "xxx%cyyy", '%');158 __test("xxx\0yyy", 7, "xxx%cyyy", '\0');159}160 161static void __init162test_number(void)163{164 test("0x1234abcd ", "%#-12x", 0x1234abcd);165 test(" 0x1234abcd", "%#12x", 0x1234abcd);166 test("0|001| 12|+123| 1234|-123|-1234", "%d|%03d|%3d|%+d|% d|%+d|% d", 0, 1, 12, 123, 1234, -123, -1234);167 NOWARN(-Wformat, "Intentionally test narrowing conversion specifiers.", {168 test("0|1|1|128|255", "%hhu|%hhu|%hhu|%hhu|%hhu", 0, 1, 257, 128, -1);169 test("0|1|1|-128|-1", "%hhd|%hhd|%hhd|%hhd|%hhd", 0, 1, 257, 128, -1);170 test("2015122420151225", "%ho%ho%#ho", 1037, 5282, -11627);171 })172 /*173 * POSIX/C99: »The result of converting zero with an explicit174 * precision of zero shall be no characters.« Hence the output175 * from the below test should really be "00|0||| ". However,176 * the kernel's printf also produces a single 0 in that177 * case. This test case simply documents the current178 * behaviour.179 */180 test("00|0|0|0|0", "%.2d|%.1d|%.0d|%.*d|%1.0d", 0, 0, 0, 0, 0, 0);181}182 183static void __init184test_string(void)185{186 test("", "%s%.0s", "", "123");187 test("ABCD|abc|123", "%s|%.3s|%.*s", "ABCD", "abcdef", 3, "123456");188 test("1 | 2|3 | 4|5 ", "%-3s|%3s|%-*s|%*s|%*s", "1", "2", 3, "3", 3, "4", -3, "5");189 test("1234 ", "%-10.4s", "123456");190 test(" 1234", "%10.4s", "123456");191 /*192 * POSIX and C99 say that a negative precision (which is only193 * possible to pass via a * argument) should be treated as if194 * the precision wasn't present, and that if the precision is195 * omitted (as in %.s), the precision should be taken to be196 * 0. However, the kernel's printf behave exactly opposite,197 * treating a negative precision as 0 and treating an omitted198 * precision specifier as if no precision was given.199 *200 * These test cases document the current behaviour; should201 * anyone ever feel the need to follow the standards more202 * closely, this can be revisited.203 */204 test(" ", "%4.*s", -5, "123456");205 test("123456", "%.s", "123456");206 test("a||", "%.s|%.0s|%.*s", "a", "b", 0, "c");207 test("a | | ", "%-3.s|%-3.0s|%-3.*s", "a", "b", 0, "c");208}209 210#define PLAIN_BUF_SIZE 64 /* leave some space so we don't oops */211 212#if BITS_PER_LONG == 64213 214#define PTR_WIDTH 16215#define PTR ((void *)0xffff0123456789abUL)216#define PTR_STR "ffff0123456789ab"217#define PTR_VAL_NO_CRNG "(____ptrval____)"218#define ZEROS "00000000" /* hex 32 zero bits */219#define ONES "ffffffff" /* hex 32 one bits */220 221static int __init222plain_format(void)223{224 char buf[PLAIN_BUF_SIZE];225 int nchars;226 227 nchars = snprintf(buf, PLAIN_BUF_SIZE, "%p", PTR);228 229 if (nchars != PTR_WIDTH)230 return -1;231 232 if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {233 pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",234 PTR_VAL_NO_CRNG);235 return 0;236 }237 238 if (strncmp(buf, ZEROS, strlen(ZEROS)) != 0)239 return -1;240 241 return 0;242}243 244#else245 246#define PTR_WIDTH 8247#define PTR ((void *)0x456789ab)248#define PTR_STR "456789ab"249#define PTR_VAL_NO_CRNG "(ptrval)"250#define ZEROS ""251#define ONES ""252 253static int __init254plain_format(void)255{256 /* Format is implicitly tested for 32 bit machines by plain_hash() */257 return 0;258}259 260#endif /* BITS_PER_LONG == 64 */261 262static int __init263plain_hash_to_buffer(const void *p, char *buf, size_t len)264{265 int nchars;266 267 nchars = snprintf(buf, len, "%p", p);268 269 if (nchars != PTR_WIDTH)270 return -1;271 272 if (strncmp(buf, PTR_VAL_NO_CRNG, PTR_WIDTH) == 0) {273 pr_warn("crng possibly not yet initialized. plain 'p' buffer contains \"%s\"",274 PTR_VAL_NO_CRNG);275 return 0;276 }277 278 return 0;279}280 281static int __init282plain_hash(void)283{284 char buf[PLAIN_BUF_SIZE];285 int ret;286 287 ret = plain_hash_to_buffer(PTR, buf, PLAIN_BUF_SIZE);288 if (ret)289 return ret;290 291 if (strncmp(buf, PTR_STR, PTR_WIDTH) == 0)292 return -1;293 294 return 0;295}296 297/*298 * We can't use test() to test %p because we don't know what output to expect299 * after an address is hashed.300 */301static void __init302plain(void)303{304 int err;305 306 if (no_hash_pointers) {307 pr_warn("skipping plain 'p' tests");308 skipped_tests += 2;309 return;310 }311 312 err = plain_hash();313 if (err) {314 pr_warn("plain 'p' does not appear to be hashed\n");315 failed_tests++;316 return;317 }318 319 err = plain_format();320 if (err) {321 pr_warn("hashing plain 'p' has unexpected format\n");322 failed_tests++;323 }324}325 326static void __init327test_hashed(const char *fmt, const void *p)328{329 char buf[PLAIN_BUF_SIZE];330 int ret;331 332 /*333 * No need to increase failed test counter since this is assumed334 * to be called after plain().335 */336 ret = plain_hash_to_buffer(p, buf, PLAIN_BUF_SIZE);337 if (ret)338 return;339 340 test(buf, fmt, p);341}342 343/*344 * NULL pointers aren't hashed.345 */346static void __init347null_pointer(void)348{349 test(ZEROS "00000000", "%p", NULL);350 test(ZEROS "00000000", "%px", NULL);351 test("(null)", "%pE", NULL);352}353 354/*355 * Error pointers aren't hashed.356 */357static void __init358error_pointer(void)359{360 test(ONES "fffffff5", "%p", ERR_PTR(-11));361 test(ONES "fffffff5", "%px", ERR_PTR(-11));362 test("(efault)", "%pE", ERR_PTR(-11));363}364 365#define PTR_INVALID ((void *)0x000000ab)366 367static void __init368invalid_pointer(void)369{370 test_hashed("%p", PTR_INVALID);371 test(ZEROS "000000ab", "%px", PTR_INVALID);372 test("(efault)", "%pE", PTR_INVALID);373}374 375static void __init376symbol_ptr(void)377{378}379 380static void __init381kernel_ptr(void)382{383 /* We can't test this without access to kptr_restrict. */384}385 386static void __init387struct_resource(void)388{389}390 391static void __init392addr(void)393{394}395 396static void __init397escaped_str(void)398{399}400 401static void __init402hex_string(void)403{404 const char buf[3] = {0xc0, 0xff, 0xee};405 406 test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee",407 "%3ph|%3phC|%3phD|%3phN", buf, buf, buf, buf);408 test("c0 ff ee|c0:ff:ee|c0-ff-ee|c0ffee",409 "%*ph|%*phC|%*phD|%*phN", 3, buf, 3, buf, 3, buf, 3, buf);410}411 412static void __init413mac(void)414{415 const u8 addr[6] = {0x2d, 0x48, 0xd6, 0xfc, 0x7a, 0x05};416 417 test("2d:48:d6:fc:7a:05", "%pM", addr);418 test("05:7a:fc:d6:48:2d", "%pMR", addr);419 test("2d-48-d6-fc-7a-05", "%pMF", addr);420 test("2d48d6fc7a05", "%pm", addr);421 test("057afcd6482d", "%pmR", addr);422}423 424static void __init425ip4(void)426{427 struct sockaddr_in sa;428 429 sa.sin_family = AF_INET;430 sa.sin_port = cpu_to_be16(12345);431 sa.sin_addr.s_addr = cpu_to_be32(0x7f000001);432 433 test("127.000.000.001|127.0.0.1", "%pi4|%pI4", &sa.sin_addr, &sa.sin_addr);434 test("127.000.000.001|127.0.0.1", "%piS|%pIS", &sa, &sa);435 sa.sin_addr.s_addr = cpu_to_be32(0x01020304);436 test("001.002.003.004:12345|1.2.3.4:12345", "%piSp|%pISp", &sa, &sa);437}438 439static void __init440ip6(void)441{442}443 444static void __init445ip(void)446{447 ip4();448 ip6();449}450 451static void __init452uuid(void)453{454 const char uuid[16] = {0x0, 0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,455 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf};456 457 test("00010203-0405-0607-0809-0a0b0c0d0e0f", "%pUb", uuid);458 test("00010203-0405-0607-0809-0A0B0C0D0E0F", "%pUB", uuid);459 test("03020100-0504-0706-0809-0a0b0c0d0e0f", "%pUl", uuid);460 test("03020100-0504-0706-0809-0A0B0C0D0E0F", "%pUL", uuid);461}462 463static struct dentry test_dentry[4] __initdata = {464 { .d_parent = &test_dentry[0],465 .d_name = QSTR_INIT(test_dentry[0].d_iname, 3),466 .d_iname = "foo" },467 { .d_parent = &test_dentry[0],468 .d_name = QSTR_INIT(test_dentry[1].d_iname, 5),469 .d_iname = "bravo" },470 { .d_parent = &test_dentry[1],471 .d_name = QSTR_INIT(test_dentry[2].d_iname, 4),472 .d_iname = "alfa" },473 { .d_parent = &test_dentry[2],474 .d_name = QSTR_INIT(test_dentry[3].d_iname, 5),475 .d_iname = "romeo" },476};477 478static void __init479dentry(void)480{481 test("foo", "%pd", &test_dentry[0]);482 test("foo", "%pd2", &test_dentry[0]);483 484 test("(null)", "%pd", NULL);485 test("(efault)", "%pd", PTR_INVALID);486 test("(null)", "%pD", NULL);487 test("(efault)", "%pD", PTR_INVALID);488 489 test("romeo", "%pd", &test_dentry[3]);490 test("alfa/romeo", "%pd2", &test_dentry[3]);491 test("bravo/alfa/romeo", "%pd3", &test_dentry[3]);492 test("/bravo/alfa/romeo", "%pd4", &test_dentry[3]);493 test("/bravo/alfa", "%pd4", &test_dentry[2]);494 495 test("bravo/alfa |bravo/alfa ", "%-12pd2|%*pd2", &test_dentry[2], -12, &test_dentry[2]);496 test(" bravo/alfa| bravo/alfa", "%12pd2|%*pd2", &test_dentry[2], 12, &test_dentry[2]);497}498 499static void __init500struct_va_format(void)501{502}503 504static void __init505time_and_date(void)506{507 /* 1543210543 */508 const struct rtc_time tm = {509 .tm_sec = 43,510 .tm_min = 35,511 .tm_hour = 5,512 .tm_mday = 26,513 .tm_mon = 10,514 .tm_year = 118,515 };516 /* 2019-01-04T15:32:23 */517 time64_t t = 1546615943;518 519 test("(%pt?)", "%pt", &tm);520 test("2018-11-26T05:35:43", "%ptR", &tm);521 test("0118-10-26T05:35:43", "%ptRr", &tm);522 test("05:35:43|2018-11-26", "%ptRt|%ptRd", &tm, &tm);523 test("05:35:43|0118-10-26", "%ptRtr|%ptRdr", &tm, &tm);524 test("05:35:43|2018-11-26", "%ptRttr|%ptRdtr", &tm, &tm);525 test("05:35:43 tr|2018-11-26 tr", "%ptRt tr|%ptRd tr", &tm, &tm);526 527 test("2019-01-04T15:32:23", "%ptT", &t);528 test("0119-00-04T15:32:23", "%ptTr", &t);529 test("15:32:23|2019-01-04", "%ptTt|%ptTd", &t, &t);530 test("15:32:23|0119-00-04", "%ptTtr|%ptTdr", &t, &t);531 532 test("2019-01-04 15:32:23", "%ptTs", &t);533 test("0119-00-04 15:32:23", "%ptTsr", &t);534 test("15:32:23|2019-01-04", "%ptTts|%ptTds", &t, &t);535 test("15:32:23|0119-00-04", "%ptTtrs|%ptTdrs", &t, &t);536}537 538static void __init539struct_clk(void)540{541}542 543static void __init544large_bitmap(void)545{546 const int nbits = 1 << 16;547 unsigned long *bits = bitmap_zalloc(nbits, GFP_KERNEL);548 if (!bits)549 return;550 551 bitmap_set(bits, 1, 20);552 bitmap_set(bits, 60000, 15);553 test("1-20,60000-60014", "%*pbl", nbits, bits);554 bitmap_free(bits);555}556 557static void __init558bitmap(void)559{560 DECLARE_BITMAP(bits, 20);561 const int primes[] = {2,3,5,7,11,13,17,19};562 int i;563 564 bitmap_zero(bits, 20);565 test("00000|00000", "%20pb|%*pb", bits, 20, bits);566 test("|", "%20pbl|%*pbl", bits, 20, bits);567 568 for (i = 0; i < ARRAY_SIZE(primes); ++i)569 set_bit(primes[i], bits);570 test("a28ac|a28ac", "%20pb|%*pb", bits, 20, bits);571 test("2-3,5,7,11,13,17,19|2-3,5,7,11,13,17,19", "%20pbl|%*pbl", bits, 20, bits);572 573 bitmap_fill(bits, 20);574 test("fffff|fffff", "%20pb|%*pb", bits, 20, bits);575 test("0-19|0-19", "%20pbl|%*pbl", bits, 20, bits);576 577 large_bitmap();578}579 580static void __init581netdev_features(void)582{583}584 585struct page_flags_test {586 int width;587 int shift;588 int mask;589 const char *fmt;590 const char *name;591};592 593static const struct page_flags_test pft[] = {594 {SECTIONS_WIDTH, SECTIONS_PGSHIFT, SECTIONS_MASK,595 "%d", "section"},596 {NODES_WIDTH, NODES_PGSHIFT, NODES_MASK,597 "%d", "node"},598 {ZONES_WIDTH, ZONES_PGSHIFT, ZONES_MASK,599 "%d", "zone"},600 {LAST_CPUPID_WIDTH, LAST_CPUPID_PGSHIFT, LAST_CPUPID_MASK,601 "%#x", "lastcpupid"},602 {KASAN_TAG_WIDTH, KASAN_TAG_PGSHIFT, KASAN_TAG_MASK,603 "%#x", "kasantag"},604};605 606static void __init607page_flags_test(int section, int node, int zone, int last_cpupid,608 int kasan_tag, unsigned long flags, const char *name,609 char *cmp_buf)610{611 unsigned long values[] = {section, node, zone, last_cpupid, kasan_tag};612 unsigned long size;613 bool append = false;614 int i;615 616 for (i = 0; i < ARRAY_SIZE(values); i++)617 flags |= (values[i] & pft[i].mask) << pft[i].shift;618 619 size = scnprintf(cmp_buf, BUF_SIZE, "%#lx(", flags);620 if (flags & PAGEFLAGS_MASK) {621 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s", name);622 append = true;623 }624 625 for (i = 0; i < ARRAY_SIZE(pft); i++) {626 if (!pft[i].width)627 continue;628 629 if (append)630 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "|");631 632 size += scnprintf(cmp_buf + size, BUF_SIZE - size, "%s=",633 pft[i].name);634 size += scnprintf(cmp_buf + size, BUF_SIZE - size, pft[i].fmt,635 values[i] & pft[i].mask);636 append = true;637 }638 639 snprintf(cmp_buf + size, BUF_SIZE - size, ")");640 641 test(cmp_buf, "%pGp", &flags);642}643 644static void __init645flags(void)646{647 unsigned long flags;648 char *cmp_buffer;649 gfp_t gfp;650 651 cmp_buffer = kmalloc(BUF_SIZE, GFP_KERNEL);652 if (!cmp_buffer)653 return;654 655 flags = 0;656 page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer);657 658 flags = 1UL << NR_PAGEFLAGS;659 page_flags_test(0, 0, 0, 0, 0, flags, "", cmp_buffer);660 661 flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru662 | 1UL << PG_active | 1UL << PG_swapbacked;663 page_flags_test(1, 1, 1, 0x1fffff, 1, flags,664 "uptodate|dirty|lru|active|swapbacked",665 cmp_buffer);666 667 flags = VM_READ | VM_EXEC | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC;668 test("read|exec|mayread|maywrite|mayexec", "%pGv", &flags);669 670 gfp = GFP_TRANSHUGE;671 test("GFP_TRANSHUGE", "%pGg", &gfp);672 673 gfp = GFP_ATOMIC|__GFP_DMA;674 test("GFP_ATOMIC|GFP_DMA", "%pGg", &gfp);675 676 gfp = __GFP_HIGH;677 test("__GFP_HIGH", "%pGg", &gfp);678 679 /* Any flags not translated by the table should remain numeric */680 gfp = ~__GFP_BITS_MASK;681 snprintf(cmp_buffer, BUF_SIZE, "%#lx", (unsigned long) gfp);682 test(cmp_buffer, "%pGg", &gfp);683 684 snprintf(cmp_buffer, BUF_SIZE, "__GFP_HIGH|%#lx",685 (unsigned long) gfp);686 gfp |= __GFP_HIGH;687 test(cmp_buffer, "%pGg", &gfp);688 689 kfree(cmp_buffer);690}691 692static void __init fwnode_pointer(void)693{694 const struct software_node first = { .name = "first" };695 const struct software_node second = { .name = "second", .parent = &first };696 const struct software_node third = { .name = "third", .parent = &second };697 const struct software_node *group[] = { &first, &second, &third, NULL };698 const char * const full_name_second = "first/second";699 const char * const full_name_third = "first/second/third";700 const char * const second_name = "second";701 const char * const third_name = "third";702 int rval;703 704 rval = software_node_register_node_group(group);705 if (rval) {706 pr_warn("cannot register softnodes; rval %d\n", rval);707 return;708 }709 710 test(full_name_second, "%pfw", software_node_fwnode(&second));711 test(full_name_third, "%pfw", software_node_fwnode(&third));712 test(full_name_third, "%pfwf", software_node_fwnode(&third));713 test(second_name, "%pfwP", software_node_fwnode(&second));714 test(third_name, "%pfwP", software_node_fwnode(&third));715 716 software_node_unregister_node_group(group);717}718 719static void __init fourcc_pointer(void)720{721 struct {722 u32 code;723 char *str;724 } const try[] = {725 { 0x3231564e, "NV12 little-endian (0x3231564e)", },726 { 0xb231564e, "NV12 big-endian (0xb231564e)", },727 { 0x10111213, ".... little-endian (0x10111213)", },728 { 0x20303159, "Y10 little-endian (0x20303159)", },729 };730 unsigned int i;731 732 for (i = 0; i < ARRAY_SIZE(try); i++)733 test(try[i].str, "%p4cc", &try[i].code);734}735 736static void __init737errptr(void)738{739 test("-1234", "%pe", ERR_PTR(-1234));740 741 /* Check that %pe with a non-ERR_PTR gets treated as ordinary %p. */742 BUILD_BUG_ON(IS_ERR(PTR));743 test_hashed("%pe", PTR);744 745#ifdef CONFIG_SYMBOLIC_ERRNAME746 test("(-ENOTSOCK)", "(%pe)", ERR_PTR(-ENOTSOCK));747 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EAGAIN));748 BUILD_BUG_ON(EAGAIN != EWOULDBLOCK);749 test("(-EAGAIN)", "(%pe)", ERR_PTR(-EWOULDBLOCK));750 test("[-EIO ]", "[%-8pe]", ERR_PTR(-EIO));751 test("[ -EIO]", "[%8pe]", ERR_PTR(-EIO));752 test("-EPROBE_DEFER", "%pe", ERR_PTR(-EPROBE_DEFER));753#endif754}755 756static void __init757test_pointer(void)758{759 plain();760 null_pointer();761 error_pointer();762 invalid_pointer();763 symbol_ptr();764 kernel_ptr();765 struct_resource();766 addr();767 escaped_str();768 hex_string();769 mac();770 ip();771 uuid();772 dentry();773 struct_va_format();774 time_and_date();775 struct_clk();776 bitmap();777 netdev_features();778 flags();779 errptr();780 fwnode_pointer();781 fourcc_pointer();782}783 784static void __init selftest(void)785{786 alloced_buffer = kmalloc(BUF_SIZE + 2*PAD_SIZE, GFP_KERNEL);787 if (!alloced_buffer)788 return;789 test_buffer = alloced_buffer + PAD_SIZE;790 791 test_basic();792 test_number();793 test_string();794 test_pointer();795 796 kfree(alloced_buffer);797}798 799KSTM_MODULE_LOADERS(test_printf);800MODULE_AUTHOR("Rasmus Villemoes <linux@rasmusvillemoes.dk>");801MODULE_DESCRIPTION("Test cases for printf facility");802MODULE_LICENSE("GPL");803