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Add tests for the copyin(9) handling of illegal buffers.

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Reviewed by:	emaste, ngie
Sponsored by:	The FreeBSD Foundation
Differential revision:	https://reviews.freebsd.org/D3925
This commit is contained in:
kib 2015-10-19 20:22:17 +00:00
parent a23a5462a5
commit 0d79310cdf
2 changed files with 87 additions and 0 deletions
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1
tests/sys/kern/Makefile
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@ -2,6 +2,7 @@
TESTSDIR= ${TESTSBASE}/sys/kern
ATF_TESTS_C+= kern_copyin
ATF_TESTS_C+= kern_descrip_test
ATF_TESTS_C+= ptrace_test
ATF_TESTS_C+= unix_seqpacket_test

86
tests/sys/kern/kern_copyin.c Normal file
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@ -0,0 +1,86 @@
/*-
* Copyright (c) 2015 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
* under sponsorship from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <atf-c.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <machine/vmparam.h>
static int scratch_file;
static int
copyin_checker(uintptr_t uaddr, size_t len)
{
ssize_t ret;
ret = write(scratch_file, (const void *)uaddr, len);
return (ret == -1 ? errno : 0);
}
#define FMAX ULONG_MAX
ATF_TC_WITHOUT_HEAD(kern_copyin);
ATF_TC_BODY(kern_copyin, tc)
{
char template[] = "copyin.XXXXXX";
scratch_file = mkstemp(template);
ATF_REQUIRE(scratch_file != -1);
unlink(template);
ATF_CHECK(copyin_checker(0, 0) == 0);
ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 10, 9) == 0);
ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 10, 10) == 0);
ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 10, 11) == EFAULT);
ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS - 1, 1) == 0);
ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS, 0) == 0);
ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS, 1) == EFAULT);
ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS, 2) == EFAULT);
ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS + 1, 0) == 0);
ATF_CHECK(copyin_checker(VM_MAXUSER_ADDRESS + 1, 2) == EFAULT);
ATF_CHECK(copyin_checker(FMAX - 10, 9) == EFAULT);
ATF_CHECK(copyin_checker(FMAX - 10, 10) == EFAULT);
ATF_CHECK(copyin_checker(FMAX - 10, 11) == EFAULT);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, kern_copyin);
return (atf_no_error());
}