| /* |
| * Copyright (c) Linux Test Project, 2014 |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU Library General Public License for more details. |
| */ |
| /* |
| * This is a regression test for madvise(2) system call. It tests kernel |
| * for NULL ptr deref Oops fixed by: |
| * commit ee53664bda169f519ce3c6a22d378f0b946c8178 |
| * Author: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> |
| * Date: Fri Dec 20 15:10:03 2013 +0200 |
| * mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support |
| * |
| * On buggy kernel with CONFIG_TRANSPARENT_HUGEPAGE=y CONFIG_DEBUG_LOCK_ALLOC=y |
| * this testcase should produce Oops and/or be killed. On fixed/good kernel |
| * this testcase runs to completion (retcode is 0) |
| */ |
| |
| #include <sys/mman.h> |
| #include <errno.h> |
| |
| #include "test.h" |
| #include "safe_macros.h" |
| |
| #define ALLOC_SIZE (32 * 1024 * 1024) |
| |
| static void setup(void); |
| static void cleanup(void); |
| |
| char *TCID = "madvise05"; |
| int TST_TOTAL = 1; |
| |
| int main(int argc, char *argv[]) |
| { |
| int lc; |
| const char *msg = NULL; |
| void *p; |
| |
| msg = parse_opts(argc, argv, NULL, NULL); |
| if (msg) |
| tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| |
| setup(); |
| |
| for (lc = 0; TEST_LOOPING(lc); lc++) { |
| p = SAFE_MMAP(cleanup, NULL, ALLOC_SIZE, PROT_READ, |
| MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0); |
| TEST(mprotect(p, ALLOC_SIZE, PROT_NONE)); |
| if (TEST_RETURN == -1) |
| tst_brkm(TBROK | TTERRNO, cleanup, "mprotect failed"); |
| TEST(madvise(p, ALLOC_SIZE, MADV_WILLNEED)); |
| SAFE_MUNMAP(cleanup, p, ALLOC_SIZE); |
| |
| if (TEST_RETURN == 0) |
| continue; |
| |
| if (TEST_ERRNO == EBADF) |
| tst_brkm(TCONF, cleanup, "CONFIG_SWAP=n"); |
| else |
| tst_brkm(TBROK | TTERRNO, cleanup, "madvise failed"); |
| } |
| |
| tst_resm(TPASS, "issue has not been reproduced"); |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static void setup(void) |
| { |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| if (tst_kvercmp(3, 9, 0) < 0) |
| tst_brkm(TCONF, NULL, "madvise(MADV_WILLNEED) swap file " |
| "prefetch available only since 3.9"); |
| TEST_PAUSE; |
| } |
| |
| static void cleanup(void) |
| { |
| } |