File: umovestr-illptr.c

package info (click to toggle)
strace 4.26-0.2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 35,988 kB
  • sloc: ansic: 95,598; sh: 7,155; makefile: 2,489; awk: 335; perl: 267; sed: 6
file content (33 lines) | stat: -rw-r--r-- 697 bytes parent folder | download | duplicates (3)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
/*
 * Check decoding of invalid pointer by umovestr.
 *
 * Copyright (c) 2016-2018 Dmitry V. Levin <ldv@altlinux.org>
 * All rights reserved.
 *
 * SPDX-License-Identifier: GPL-2.0-or-later
 */

#include "tests.h"
#include <stdio.h>
#include <unistd.h>
#include <asm/unistd.h>

int
main(void)
{
	if (F8ILL_KULONG_SUPPORTED) {
		const void *const p = tail_memdup(".", 2);
		long rc = syscall(__NR_chdir, p);
		printf("chdir(\".\") = %s\n", sprintrc(rc));

		const kernel_ulong_t ill = f8ill_ptr_to_kulong(p);
		rc = syscall(__NR_chdir, ill);
		printf("chdir(%#llx) = %s\n",
		       (unsigned long long) ill, sprintrc(rc));

		puts("+++ exited with 0 +++");
		return 0;
	} else {
		return 77;
	}
}