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60 lines
1.1 KiB
60 lines
1.1 KiB
7 months ago
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2017 FUJITSU LIMITED
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* Author: Guangwen Feng <fenggw-fnst@cn.fujitsu.com>
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*/
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/*
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* Test for CVE-2017-2618, this regression test can crash
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* the buggy kernel, and the bug was fixed in:
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*
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* commit 0c461cb727d146c9ef2d3e86214f498b78b7d125
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* Author: Stephen Smalley <sds@tycho.nsa.gov>
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* Date: Tue Jan 31 11:54:04 2017 -0500
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*
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* selinux: fix off-by-one in setprocattr
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "tst_test.h"
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#define LOOPS 100
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#define PATH_ATTRFS "/proc/self/attr/fscreate"
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static void setup(void)
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{
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if (access(PATH_ATTRFS, F_OK))
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tst_brk(TCONF, "%s does not exist", PATH_ATTRFS);
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}
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static void do_test(void)
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{
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int i, fd;
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for (i = 0; i < LOOPS; i++) {
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if (!SAFE_FORK()) {
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fd = SAFE_OPEN(PATH_ATTRFS, O_WRONLY);
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write(fd, "\n", 1);
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SAFE_CLOSE(fd);
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exit(0);
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}
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tst_reap_children();
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}
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tst_res(TPASS, "Bug not reproduced");
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}
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static struct tst_test test = {
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.forks_child = 1,
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.setup = setup,
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.test_all = do_test,
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.tags = (const struct tst_tag[]) {
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{"linux-git", "0c461cb727d1"},
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{"CVE", "2017-2618"},
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{}
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}
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};
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