56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Linux Test Project, 2014
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*/
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/*
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* This is a regression test for madvise(2) system call. It tests kernel
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* for NULL ptr deref Oops fixed by:
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* commit ee53664bda169f519ce3c6a22d378f0b946c8178
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* Author: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
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* Date: Fri Dec 20 15:10:03 2013 +0200
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* mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support
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*
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* On buggy kernel with CONFIG_TRANSPARENT_HUGEPAGE=y CONFIG_DEBUG_LOCK_ALLOC=y
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* this testcase should produce Oops and/or be killed. On fixed/good kernel
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* this testcase runs to completion (retcode is 0)
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*/
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#include <sys/mman.h>
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#include <errno.h>
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#include "tst_test.h"
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#define ALLOC_SIZE (32 * 1024 * 1024)
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static void verify_madvise(void)
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{
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void *p;
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p = SAFE_MMAP(NULL, ALLOC_SIZE, PROT_READ,
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MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);
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TEST(mprotect(p, ALLOC_SIZE, PROT_NONE));
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if (TST_RET == -1)
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tst_brk(TBROK | TTERRNO, "mprotect failed");
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TEST(madvise(p, ALLOC_SIZE, MADV_WILLNEED));
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SAFE_MUNMAP(p, ALLOC_SIZE);
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if (TST_RET == 0) {
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tst_res(TPASS, "issue has not been reproduced");
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return;
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}
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if (TST_ERR == EBADF)
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tst_brk(TCONF, "CONFIG_SWAP=n");
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else
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tst_brk(TBROK | TTERRNO, "madvise failed");
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}
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static struct tst_test test = {
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.min_kver = "3.9.0",
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.test_all = verify_madvise,
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.tags = (const struct tst_tag[]) {
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{"linux-git", "ee53664bda16"},
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{}
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}
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};
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