mirror of
https://github.com/freebsd/freebsd-src
synced 2024-10-02 22:54:52 +00:00
5c2bc3db20
These ones were unambiguous cases where the Foundation was the only listed copyright holder. Sponsored by: The FreeBSD Foundation
156 lines
4.4 KiB
C
156 lines
4.4 KiB
C
/*-
|
|
* Copyright (c) 2015, 2020 The FreeBSD Foundation
|
|
*
|
|
* 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/param.h>
|
|
#include <sys/exec.h>
|
|
#include <sys/sysctl.h>
|
|
#include <sys/user.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include <errno.h>
|
|
#include <fcntl.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);
|
|
}
|
|
|
|
#if __SIZEOF_POINTER__ == 8
|
|
/*
|
|
* A slightly more direct path to calling copyin(), but without the ability
|
|
* to specify a length.
|
|
*/
|
|
static int
|
|
copyin_checker2(uintptr_t uaddr)
|
|
{
|
|
int ret;
|
|
|
|
ret = fcntl(scratch_file, F_GETLK, (const void *)uaddr);
|
|
return (ret == -1 ? errno : 0);
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
get_vm_layout(struct kinfo_vm_layout *kvm)
|
|
{
|
|
size_t len;
|
|
int mib[4];
|
|
|
|
mib[0] = CTL_KERN;
|
|
mib[1] = KERN_PROC;
|
|
mib[2] = KERN_PROC_VM_LAYOUT;
|
|
mib[3] = getpid();
|
|
len = sizeof(*kvm);
|
|
|
|
return (sysctl(mib, nitems(mib), kvm, &len, NULL, 0));
|
|
}
|
|
|
|
#define FMAX ULONG_MAX
|
|
#if __SIZEOF_POINTER__ == 8
|
|
/* PR 257193 */
|
|
#define ADDR_SIGNED 0x800000c000000000
|
|
#endif
|
|
|
|
ATF_TC_WITHOUT_HEAD(kern_copyin);
|
|
ATF_TC_BODY(kern_copyin, tc)
|
|
{
|
|
char template[] = "copyin.XXXXXX";
|
|
struct kinfo_vm_layout kvm;
|
|
uintptr_t maxuser;
|
|
long page_size;
|
|
void *addr;
|
|
int error;
|
|
|
|
addr = MAP_FAILED;
|
|
|
|
error = get_vm_layout(&kvm);
|
|
ATF_REQUIRE(error == 0);
|
|
|
|
page_size = sysconf(_SC_PAGESIZE);
|
|
ATF_REQUIRE(page_size != (long)-1);
|
|
|
|
maxuser = kvm.kvm_max_user_addr;
|
|
scratch_file = mkstemp(template);
|
|
ATF_REQUIRE(scratch_file != -1);
|
|
unlink(template);
|
|
|
|
/*
|
|
* Since the shared page address can be randomized we need to make
|
|
* sure that something is mapped at the top of the user address space.
|
|
* Otherwise reading bytes from maxuser-X will fail rendering this test
|
|
* useless.
|
|
*/
|
|
if (kvm.kvm_shp_addr + kvm.kvm_shp_size < maxuser) {
|
|
addr = mmap((void *)(maxuser - page_size), page_size, PROT_READ,
|
|
MAP_ANON | MAP_FIXED, -1, 0);
|
|
ATF_REQUIRE(addr != MAP_FAILED);
|
|
}
|
|
|
|
ATF_CHECK(copyin_checker(0, 0) == 0);
|
|
ATF_CHECK(copyin_checker(maxuser - 10, 9) == 0);
|
|
ATF_CHECK(copyin_checker(maxuser - 10, 10) == 0);
|
|
ATF_CHECK(copyin_checker(maxuser - 10, 11) == EFAULT);
|
|
ATF_CHECK(copyin_checker(maxuser - 1, 1) == 0);
|
|
ATF_CHECK(copyin_checker(maxuser, 0) == 0);
|
|
ATF_CHECK(copyin_checker(maxuser, 1) == EFAULT);
|
|
ATF_CHECK(copyin_checker(maxuser, 2) == EFAULT);
|
|
ATF_CHECK(copyin_checker(maxuser + 1, 0) == 0);
|
|
ATF_CHECK(copyin_checker(maxuser + 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);
|
|
#if __SIZEOF_POINTER__ == 8
|
|
ATF_CHECK(copyin_checker(ADDR_SIGNED, 1) == EFAULT);
|
|
ATF_CHECK(copyin_checker2(ADDR_SIGNED) == EFAULT);
|
|
#endif
|
|
|
|
if (addr != MAP_FAILED)
|
|
munmap(addr, PAGE_SIZE);
|
|
}
|
|
|
|
ATF_TP_ADD_TCS(tp)
|
|
{
|
|
|
|
ATF_TP_ADD_TC(tp, kern_copyin);
|
|
return (atf_no_error());
|
|
}
|