// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <linux/mman.h>
#include <sys/mman.h>
#include <stdint.h>
#include <asm-generic/unistd.h>
#include <string.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <stdbool.h>
#include "../kselftest.h"
#include <syscall.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/vfs.h>
#include <sys/stat.h>
#include "mseal_helpers.h"
static unsigned long get_vma_size(void *addr, int *prot)
{
FILE *maps;
char line[256];
int size = 0;
uintptr_t addr_start, addr_end;
char protstr[5];
*prot = 0;
maps = fopen("/proc/self/maps", "r");
if (!maps)
return 0;
while (fgets(line, sizeof(line), maps)) {
if (sscanf(line, "%lx-%lx %4s", &addr_start, &addr_end, protstr) == 3) {
if (addr_start == (uintptr_t) addr) {
size = addr_end - addr_start;
if (protstr[0] == 'r')
*prot |= 0x4;
if (protstr[1] == 'w')
*prot |= 0x2;
if (protstr[2] == 'x')
*prot |= 0x1;
break;
}
}
}
fclose(maps);
return size;
}
/*
* define sys_xyx to call syscall directly.
*/
static int sys_mseal(void *start, size_t len)
{
int sret;
errno = 0;
sret = syscall(__NR_mseal, start, len, 0);
return sret;
}
static int sys_mprotect(void *ptr, size_t size, unsigned long prot)
{
int sret;
errno = 0;
sret = syscall(__NR_mprotect, ptr, size, prot);
return sret;
}
static int sys_mprotect_pkey(void *ptr, size_t size, unsigned long orig_prot,
unsigned long pkey)
{
int sret;
errno = 0;
sret = syscall(__NR_pkey_mprotect, ptr, size, orig_prot, pkey);
return sret;
}
static void *sys_mmap(void *addr, unsigned long len, unsigned long prot,
unsigned long flags, unsigned long fd, unsigned long offset)
{
void *sret;
errno = 0;
sret = (void *) syscall(__NR_mmap, addr, len, prot,
flags, fd, offset);
return sret;
}
static int sys_munmap(void *ptr, size_t size)
{
int sret;
errno = 0;
sret = syscall(__NR_munmap, ptr, size);
return sret;
}
static int sys_madvise(void *start, size_t len, int types)
{
int sret;
errno = 0;
sret = syscall(__NR_madvise, start, len, types);
return sret;
}
static int sys_pkey_alloc(unsigned long flags, unsigned long init_val)
{
int ret = syscall(__NR_pkey_alloc, flags, init_val);
return ret;
}
static unsigned int __read_pkey_reg(void)
{
unsigned int pkey_reg = 0;
#if defined(__i386__) || defined(__x86_64__) /* arch */
unsigned int eax, edx;
unsigned int ecx = 0;
asm volatile(".byte 0x0f,0x01,0xee\n\t"
: "=a" (eax), "=d" (edx)
: "c" (ecx));
pkey_reg = eax;
#endif
return pkey_reg;
}
static void __write_pkey_reg(u64 pkey_reg)
{
#if defined(__i386__) || defined(__x86_64__) /* arch */
unsigned int eax = pkey_reg;
unsigned int ecx = 0;
unsigned int edx = 0;
asm volatile(".byte 0x0f,0x01,0xef\n\t"
: : "a" (eax), "c" (ecx), "d" (edx));
#endif
}
static unsigned long pkey_bit_position(int pkey)
{
return pkey * PKEY_BITS_PER_PKEY;
}
static u64 set_pkey_bits(u64 reg, int pkey, u64 flags)
{
unsigned long shift = pkey_bit_position(pkey);
/* mask out bits from pkey in old value */
reg &= ~((u64)PKEY_MASK << shift);
/* OR in new bits for pkey */
reg |= (flags & PKEY_MASK) << shift;
return reg;
}
static void set_pkey(int pkey, unsigned long pkey_value)
{
u64 new_pkey_reg;
new_pkey_reg = set_pkey_bits(__read_pkey_reg(), pkey, pkey_value);
__write_pkey_reg(new_pkey_reg);
}
static void setup_single_address(int size, void **ptrOut)
{
void *ptr;
ptr = sys_mmap(NULL, size, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
*ptrOut = ptr;
}
static void setup_single_address_rw(int size, void **ptrOut)
{
void *ptr;
unsigned long mapflags = MAP_ANONYMOUS | MAP_PRIVATE;
ptr = sys_mmap(NULL, size, PROT_READ | PROT_WRITE, mapflags, -1, 0);
*ptrOut = ptr;
}
static int clean_single_address(void *ptr, int size)
{
int ret;
ret = munmap(ptr, size);
return ret;
}
static int seal_single_address(void *ptr, int size)
{
int ret;
ret = sys_mseal(ptr, size);
return ret;
}
bool seal_support(void)
{
int ret;
void *ptr;
unsigned long page_size = getpagesize();
ptr = sys_mmap(NULL, page_size, PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
if (ptr == (void *) -1)
return false;
ret = sys_mseal(ptr, page_size);
if (ret < 0)
return false;
return true;
}
bool pkey_supported(void)
{
#if defined(__i386__) || defined(__x86_64__) /* arch */
int pkey = sys_pkey_alloc(0, 0);
if (pkey > 0)
return true;
#endif
return false;
}
static void test_seal_addseal(void)
{
int ret;
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_unmapped_start(void)
{
int ret;
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* munmap 2 pages from ptr. */
ret = sys_munmap(ptr, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
/* mprotect will fail because 2 pages from ptr are unmapped. */
ret = sys_mprotect(ptr, size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(ret < 0);
/* mseal will fail because 2 pages from ptr are unmapped. */
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(ret < 0);
ret = sys_mseal(ptr + 2 * page_size, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_unmapped_middle(void)
{
int ret;
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* munmap 2 pages from ptr + page. */
ret = sys_munmap(ptr + page_size, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
/* mprotect will fail, since middle 2 pages are unmapped. */
ret = sys_mprotect(ptr, size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(ret < 0);
/* mseal will fail as well. */
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(ret < 0);
/* we still can add seal to the first page and last page*/
ret = sys_mseal(ptr, page_size);
FAIL_TEST_IF_FALSE(!ret);
ret = sys_mseal(ptr + 3 * page_size, page_size);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_unmapped_end(void)
{
int ret;
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* unmap last 2 pages. */
ret = sys_munmap(ptr + 2 * page_size, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
/* mprotect will fail since last 2 pages are unmapped. */
ret = sys_mprotect(ptr, size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(ret < 0);
/* mseal will fail as well. */
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(ret < 0);
/* The first 2 pages is not sealed, and can add seals */
ret = sys_mseal(ptr, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_multiple_vmas(void)
{
int ret;
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* use mprotect to split the vma into 3. */
ret = sys_mprotect(ptr + page_size, 2 * page_size,
PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* mprotect will get applied to all 4 pages - 3 VMAs. */
ret = sys_mprotect(ptr, size, PROT_READ);
FAIL_TEST_IF_FALSE(!ret);
/* use mprotect to split the vma into 3. */
ret = sys_mprotect(ptr + page_size, 2 * page_size,
PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* mseal get applied to all 4 pages - 3 VMAs. */
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_split_start(void)
{
int ret;
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* use mprotect to split at middle */
ret = sys_mprotect(ptr, 2 * page_size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* seal the first page, this will split the VMA */
ret = sys_mseal(ptr, page_size);
FAIL_TEST_IF_FALSE(!ret);
/* add seal to the remain 3 pages */
ret = sys_mseal(ptr + page_size, 3 * page_size);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_split_end(void)
{
int ret;
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* use mprotect to split at middle */
ret = sys_mprotect(ptr, 2 * page_size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* seal the last page */
ret = sys_mseal(ptr + 3 * page_size, page_size);
FAIL_TEST_IF_FALSE(!ret);
/* Adding seals to the first 3 pages */
ret = sys_mseal(ptr, 3 * page_size);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_invalid_input(void)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(8 * page_size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
ret = clean_single_address(ptr + 4 * page_size, 4 * page_size);
FAIL_TEST_IF_FALSE(!ret);
/* invalid flag */
ret = syscall(__NR_mseal, ptr, size, 0x20);
FAIL_TEST_IF_FALSE(ret < 0);
/* unaligned address */
ret = sys_mseal(ptr + 1, 2 * page_size);
FAIL_TEST_IF_FALSE(ret < 0);
/* length too big */
ret = sys_mseal(ptr, 5 * page_size);
FAIL_TEST_IF_FALSE(ret < 0);
/* length overflow */
ret = sys_mseal(ptr, UINT64_MAX/page_size);
FAIL_TEST_IF_FALSE(ret < 0);
/* start is not in a valid VMA */
ret = sys_mseal(ptr - page_size, 5 * page_size);
FAIL_TEST_IF_FALSE(ret < 0);
REPORT_TEST_PASS();
}
static void test_seal_zero_length(void)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
ret = sys_mprotect(ptr, 0, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* seal 0 length will be OK, same as mprotect */
ret = sys_mseal(ptr, 0);
FAIL_TEST_IF_FALSE(!ret);
/* verify the 4 pages are not sealed by previous call. */
ret = sys_mprotect(ptr, size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_zero_address(void)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
int prot;
/* use mmap to change protection. */
ptr = sys_mmap(0, size, PROT_NONE,
MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
FAIL_TEST_IF_FALSE(ptr == 0);
size = get_vma_size(ptr, &prot);
FAIL_TEST_IF_FALSE(size == 4 * page_size);
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
/* verify the 4 pages are sealed by previous call. */
ret = sys_mprotect(ptr, size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(ret);
REPORT_TEST_PASS();
}
static void test_seal_twice(void)
{
int ret;
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
/* apply the same seal will be OK. idempotent. */
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_mprotect(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = seal_single_address(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
ret = sys_mprotect(ptr, size, PROT_READ | PROT_WRITE);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_start_mprotect(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = seal_single_address(ptr, page_size);
FAIL_TEST_IF_FALSE(!ret);
}
/* the first page is sealed. */
ret = sys_mprotect(ptr, page_size, PROT_READ | PROT_WRITE);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
/* pages after the first page is not sealed. */
ret = sys_mprotect(ptr + page_size, page_size * 3,
PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_end_mprotect(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = seal_single_address(ptr + page_size, 3 * page_size);
FAIL_TEST_IF_FALSE(!ret);
}
/* first page is not sealed */
ret = sys_mprotect(ptr, page_size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* last 3 page are sealed */
ret = sys_mprotect(ptr + page_size, page_size * 3,
PROT_READ | PROT_WRITE);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_mprotect_unalign_len(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = seal_single_address(ptr, page_size * 2 - 1);
FAIL_TEST_IF_FALSE(!ret);
}
/* 2 pages are sealed. */
ret = sys_mprotect(ptr, page_size * 2, PROT_READ | PROT_WRITE);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
ret = sys_mprotect(ptr + page_size * 2, page_size,
PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_mprotect_unalign_len_variant_2(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = seal_single_address(ptr, page_size * 2 + 1);
FAIL_TEST_IF_FALSE(!ret);
}
/* 3 pages are sealed. */
ret = sys_mprotect(ptr, page_size * 3, PROT_READ | PROT_WRITE);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
ret = sys_mprotect(ptr + page_size * 3, page_size,
PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_mprotect_two_vma(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* use mprotect to split */
ret = sys_mprotect(ptr, page_size * 2, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
if (seal) {
ret = seal_single_address(ptr, page_size * 4);
FAIL_TEST_IF_FALSE(!ret);
}
ret = sys_mprotect(ptr, page_size * 2, PROT_READ | PROT_WRITE);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
ret = sys_mprotect(ptr + page_size * 2, page_size * 2,
PROT_READ | PROT_WRITE);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_mprotect_two_vma_with_split(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* use mprotect to split as two vma. */
ret = sys_mprotect(ptr, page_size * 2, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* mseal can apply across 2 vma, also split them. */
if (seal) {
ret = seal_single_address(ptr + page_size, page_size * 2);
FAIL_TEST_IF_FALSE(!ret);
}
/* the first page is not sealed. */
ret = sys_mprotect(ptr, page_size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* the second page is sealed. */
ret = sys_mprotect(ptr + page_size, page_size, PROT_READ | PROT_WRITE);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
/* the third page is sealed. */
ret = sys_mprotect(ptr + 2 * page_size, page_size,
PROT_READ | PROT_WRITE);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
/* the fouth page is not sealed. */
ret = sys_mprotect(ptr + 3 * page_size, page_size,
PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_mprotect_partial_mprotect(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* seal one page. */
if (seal) {
ret = seal_single_address(ptr, page_size);
FAIL_TEST_IF_FALSE(!ret);
}
/* mprotect first 2 page will fail, since the first page are sealed. */
ret = sys_mprotect(ptr, 2 * page_size, PROT_READ | PROT_WRITE);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_mprotect_two_vma_with_gap(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* use mprotect to split. */
ret = sys_mprotect(ptr, page_size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* use mprotect to split. */
ret = sys_mprotect(ptr + 3 * page_size, page_size,
PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* use munmap to free two pages in the middle */
ret = sys_munmap(ptr + page_size, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
/* mprotect will fail, because there is a gap in the address. */
/* notes, internally mprotect still updated the first page. */
ret = sys_mprotect(ptr, 4 * page_size, PROT_READ);
FAIL_TEST_IF_FALSE(ret < 0);
/* mseal will fail as well. */
ret = sys_mseal(ptr, 4 * page_size);
FAIL_TEST_IF_FALSE(ret < 0);
/* the first page is not sealed. */
ret = sys_mprotect(ptr, page_size, PROT_READ);
FAIL_TEST_IF_FALSE(ret == 0);
/* the last page is not sealed. */
ret = sys_mprotect(ptr + 3 * page_size, page_size, PROT_READ);
FAIL_TEST_IF_FALSE(ret == 0);
REPORT_TEST_PASS();
}
static void test_seal_mprotect_split(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* use mprotect to split. */
ret = sys_mprotect(ptr, page_size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* seal all 4 pages. */
if (seal) {
ret = sys_mseal(ptr, 4 * page_size);
FAIL_TEST_IF_FALSE(!ret);
}
/* mprotect is sealed. */
ret = sys_mprotect(ptr, 2 * page_size, PROT_READ);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
ret = sys_mprotect(ptr + 2 * page_size, 2 * page_size, PROT_READ);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_mprotect_merge(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* use mprotect to split one page. */
ret = sys_mprotect(ptr, page_size, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
/* seal first two pages. */
if (seal) {
ret = sys_mseal(ptr, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
}
/* 2 pages are sealed. */
ret = sys_mprotect(ptr, 2 * page_size, PROT_READ);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
/* last 2 pages are not sealed. */
ret = sys_mprotect(ptr + 2 * page_size, 2 * page_size, PROT_READ);
FAIL_TEST_IF_FALSE(ret == 0);
REPORT_TEST_PASS();
}
static void test_seal_munmap(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* 4 pages are sealed. */
ret = sys_munmap(ptr, size);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
/*
* allocate 4 pages,
* use mprotect to split it as two VMAs
* seal the whole range
* munmap will fail on both
*/
static void test_seal_munmap_two_vma(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* use mprotect to split */
ret = sys_mprotect(ptr, page_size * 2, PROT_READ | PROT_WRITE);
FAIL_TEST_IF_FALSE(!ret);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
ret = sys_munmap(ptr, page_size * 2);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
ret = sys_munmap(ptr + page_size, page_size * 2);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
/*
* allocate a VMA with 4 pages.
* munmap the middle 2 pages.
* seal the whole 4 pages, will fail.
* munmap the first page will be OK.
* munmap the last page will be OK.
*/
static void test_seal_munmap_vma_with_gap(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
ret = sys_munmap(ptr + page_size, page_size * 2);
FAIL_TEST_IF_FALSE(!ret);
if (seal) {
/* can't have gap in the middle. */
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(ret < 0);
}
ret = sys_munmap(ptr, page_size);
FAIL_TEST_IF_FALSE(!ret);
ret = sys_munmap(ptr + page_size * 2, page_size);
FAIL_TEST_IF_FALSE(!ret);
ret = sys_munmap(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_munmap_start_freed(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
int prot;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* unmap the first page. */
ret = sys_munmap(ptr, page_size);
FAIL_TEST_IF_FALSE(!ret);
/* seal the last 3 pages. */
if (seal) {
ret = sys_mseal(ptr + page_size, 3 * page_size);
FAIL_TEST_IF_FALSE(!ret);
}
/* unmap from the first page. */
ret = sys_munmap(ptr, size);
if (seal) {
FAIL_TEST_IF_FALSE(ret < 0);
size = get_vma_size(ptr + page_size, &prot);
FAIL_TEST_IF_FALSE(size == page_size * 3);
} else {
/* note: this will be OK, even the first page is */
/* already unmapped. */
FAIL_TEST_IF_FALSE(!ret);
size = get_vma_size(ptr + page_size, &prot);
FAIL_TEST_IF_FALSE(size == 0);
}
REPORT_TEST_PASS();
}
static void test_munmap_end_freed(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* unmap last page. */
ret = sys_munmap(ptr + page_size * 3, page_size);
FAIL_TEST_IF_FALSE(!ret);
/* seal the first 3 pages. */
if (seal) {
ret = sys_mseal(ptr, 3 * page_size);
FAIL_TEST_IF_FALSE(!ret);
}
/* unmap all pages. */
ret = sys_munmap(ptr, size);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_munmap_middle_freed(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
int prot;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* unmap 2 pages in the middle. */
ret = sys_munmap(ptr + page_size, page_size * 2);
FAIL_TEST_IF_FALSE(!ret);
/* seal the first page. */
if (seal) {
ret = sys_mseal(ptr, page_size);
FAIL_TEST_IF_FALSE(!ret);
}
/* munmap all 4 pages. */
ret = sys_munmap(ptr, size);
if (seal) {
FAIL_TEST_IF_FALSE(ret < 0);
size = get_vma_size(ptr, &prot);
FAIL_TEST_IF_FALSE(size == page_size);
size = get_vma_size(ptr + page_size * 3, &prot);
FAIL_TEST_IF_FALSE(size == page_size);
} else {
FAIL_TEST_IF_FALSE(!ret);
size = get_vma_size(ptr, &prot);
FAIL_TEST_IF_FALSE(size == 0);
size = get_vma_size(ptr + page_size * 3, &prot);
FAIL_TEST_IF_FALSE(size == 0);
}
REPORT_TEST_PASS();
}
static void test_seal_mremap_shrink(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* shrink from 4 pages to 2 pages. */
ret2 = mremap(ptr, size, 2 * page_size, 0, 0);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else {
FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED);
}
REPORT_TEST_PASS();
}
static void test_seal_mremap_expand(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* ummap last 2 pages. */
ret = sys_munmap(ptr + 2 * page_size, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
if (seal) {
ret = sys_mseal(ptr, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
}
/* expand from 2 page to 4 pages. */
ret2 = mremap(ptr, 2 * page_size, 4 * page_size, 0, 0);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else {
FAIL_TEST_IF_FALSE(ret2 == ptr);
}
REPORT_TEST_PASS();
}
static void test_seal_mremap_move(bool seal)
{
void *ptr, *newPtr;
unsigned long page_size = getpagesize();
unsigned long size = page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
setup_single_address(size, &newPtr);
FAIL_TEST_IF_FALSE(newPtr != (void *)-1);
ret = clean_single_address(newPtr, size);
FAIL_TEST_IF_FALSE(!ret);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* move from ptr to fixed address. */
ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newPtr);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else {
FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED);
}
REPORT_TEST_PASS();
}
static void test_seal_mmap_overwrite_prot(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* use mmap to change protection. */
ret2 = sys_mmap(ptr, size, PROT_NONE,
MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else
FAIL_TEST_IF_FALSE(ret2 == ptr);
REPORT_TEST_PASS();
}
static void test_seal_mmap_expand(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 12 * page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* ummap last 4 pages. */
ret = sys_munmap(ptr + 8 * page_size, 4 * page_size);
FAIL_TEST_IF_FALSE(!ret);
if (seal) {
ret = sys_mseal(ptr, 8 * page_size);
FAIL_TEST_IF_FALSE(!ret);
}
/* use mmap to expand. */
ret2 = sys_mmap(ptr, size, PROT_READ,
MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else
FAIL_TEST_IF_FALSE(ret2 == ptr);
REPORT_TEST_PASS();
}
static void test_seal_mmap_shrink(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 12 * page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* use mmap to shrink. */
ret2 = sys_mmap(ptr, 8 * page_size, PROT_READ,
MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else
FAIL_TEST_IF_FALSE(ret2 == ptr);
REPORT_TEST_PASS();
}
static void test_seal_mremap_shrink_fixed(bool seal)
{
void *ptr;
void *newAddr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
setup_single_address(size, &newAddr);
FAIL_TEST_IF_FALSE(newAddr != (void *)-1);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* mremap to move and shrink to fixed address */
ret2 = mremap(ptr, size, 2 * page_size, MREMAP_MAYMOVE | MREMAP_FIXED,
newAddr);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else
FAIL_TEST_IF_FALSE(ret2 == newAddr);
REPORT_TEST_PASS();
}
static void test_seal_mremap_expand_fixed(bool seal)
{
void *ptr;
void *newAddr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
void *ret2;
setup_single_address(page_size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
setup_single_address(size, &newAddr);
FAIL_TEST_IF_FALSE(newAddr != (void *)-1);
if (seal) {
ret = sys_mseal(newAddr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* mremap to move and expand to fixed address */
ret2 = mremap(ptr, page_size, size, MREMAP_MAYMOVE | MREMAP_FIXED,
newAddr);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else
FAIL_TEST_IF_FALSE(ret2 == newAddr);
REPORT_TEST_PASS();
}
static void test_seal_mremap_move_fixed(bool seal)
{
void *ptr;
void *newAddr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
setup_single_address(size, &newAddr);
FAIL_TEST_IF_FALSE(newAddr != (void *)-1);
if (seal) {
ret = sys_mseal(newAddr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* mremap to move to fixed address */
ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_FIXED, newAddr);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else
FAIL_TEST_IF_FALSE(ret2 == newAddr);
REPORT_TEST_PASS();
}
static void test_seal_mremap_move_fixed_zero(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/*
* MREMAP_FIXED can move the mapping to zero address
*/
ret2 = mremap(ptr, size, 2 * page_size, MREMAP_MAYMOVE | MREMAP_FIXED,
0);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else {
FAIL_TEST_IF_FALSE(ret2 == 0);
}
REPORT_TEST_PASS();
}
static void test_seal_mremap_move_dontunmap(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* mremap to move, and don't unmap src addr. */
ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP, 0);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else {
FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED);
}
REPORT_TEST_PASS();
}
static void test_seal_mremap_move_dontunmap_anyaddr(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
void *ret2;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/*
* The 0xdeaddead should not have effect on dest addr
* when MREMAP_DONTUNMAP is set.
*/
ret2 = mremap(ptr, size, size, MREMAP_MAYMOVE | MREMAP_DONTUNMAP,
0xdeaddead);
if (seal) {
FAIL_TEST_IF_FALSE(ret2 == MAP_FAILED);
FAIL_TEST_IF_FALSE(errno == EPERM);
} else {
FAIL_TEST_IF_FALSE(ret2 != MAP_FAILED);
FAIL_TEST_IF_FALSE((long)ret2 != 0xdeaddead);
}
REPORT_TEST_PASS();
}
static void test_seal_merge_and_split(void)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size;
int ret;
int prot;
/* (24 RO) */
setup_single_address(24 * page_size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
/* use mprotect(NONE) to set out boundary */
/* (1 NONE) (22 RO) (1 NONE) */
ret = sys_mprotect(ptr, page_size, PROT_NONE);
FAIL_TEST_IF_FALSE(!ret);
ret = sys_mprotect(ptr + 23 * page_size, page_size, PROT_NONE);
FAIL_TEST_IF_FALSE(!ret);
size = get_vma_size(ptr + page_size, &prot);
FAIL_TEST_IF_FALSE(size == 22 * page_size);
FAIL_TEST_IF_FALSE(prot == 4);
/* use mseal to split from beginning */
/* (1 NONE) (1 RO_SEAL) (21 RO) (1 NONE) */
ret = sys_mseal(ptr + page_size, page_size);
FAIL_TEST_IF_FALSE(!ret);
size = get_vma_size(ptr + page_size, &prot);
FAIL_TEST_IF_FALSE(size == page_size);
FAIL_TEST_IF_FALSE(prot == 0x4);
size = get_vma_size(ptr + 2 * page_size, &prot);
FAIL_TEST_IF_FALSE(size == 21 * page_size);
FAIL_TEST_IF_FALSE(prot == 0x4);
/* use mseal to split from the end. */
/* (1 NONE) (1 RO_SEAL) (20 RO) (1 RO_SEAL) (1 NONE) */
ret = sys_mseal(ptr + 22 * page_size, page_size);
FAIL_TEST_IF_FALSE(!ret);
size = get_vma_size(ptr + 22 * page_size, &prot);
FAIL_TEST_IF_FALSE(size == page_size);
FAIL_TEST_IF_FALSE(prot == 0x4);
size = get_vma_size(ptr + 2 * page_size, &prot);
FAIL_TEST_IF_FALSE(size == 20 * page_size);
FAIL_TEST_IF_FALSE(prot == 0x4);
/* merge with prev. */
/* (1 NONE) (2 RO_SEAL) (19 RO) (1 RO_SEAL) (1 NONE) */
ret = sys_mseal(ptr + 2 * page_size, page_size);
FAIL_TEST_IF_FALSE(!ret);
size = get_vma_size(ptr + page_size, &prot);
FAIL_TEST_IF_FALSE(size == 2 * page_size);
FAIL_TEST_IF_FALSE(prot == 0x4);
/* merge with after. */
/* (1 NONE) (2 RO_SEAL) (18 RO) (2 RO_SEALS) (1 NONE) */
ret = sys_mseal(ptr + 21 * page_size, page_size);
FAIL_TEST_IF_FALSE(!ret);
size = get_vma_size(ptr + 21 * page_size, &prot);
FAIL_TEST_IF_FALSE(size == 2 * page_size);
FAIL_TEST_IF_FALSE(prot == 0x4);
/* split and merge from prev */
/* (1 NONE) (3 RO_SEAL) (17 RO) (2 RO_SEALS) (1 NONE) */
ret = sys_mseal(ptr + 2 * page_size, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
size = get_vma_size(ptr + 1 * page_size, &prot);
FAIL_TEST_IF_FALSE(size == 3 * page_size);
FAIL_TEST_IF_FALSE(prot == 0x4);
ret = sys_munmap(ptr + page_size, page_size);
FAIL_TEST_IF_FALSE(ret < 0);
ret = sys_mprotect(ptr + 2 * page_size, page_size, PROT_NONE);
FAIL_TEST_IF_FALSE(ret < 0);
/* split and merge from next */
/* (1 NONE) (3 RO_SEAL) (16 RO) (3 RO_SEALS) (1 NONE) */
ret = sys_mseal(ptr + 20 * page_size, 2 * page_size);
FAIL_TEST_IF_FALSE(!ret);
FAIL_TEST_IF_FALSE(prot == 0x4);
size = get_vma_size(ptr + 20 * page_size, &prot);
FAIL_TEST_IF_FALSE(size == 3 * page_size);
FAIL_TEST_IF_FALSE(prot == 0x4);
/* merge from middle of prev and middle of next. */
/* (1 NONE) (22 RO_SEAL) (1 NONE) */
ret = sys_mseal(ptr + 2 * page_size, 20 * page_size);
FAIL_TEST_IF_FALSE(!ret);
size = get_vma_size(ptr + page_size, &prot);
FAIL_TEST_IF_FALSE(size == 22 * page_size);
FAIL_TEST_IF_FALSE(prot == 0x4);
REPORT_TEST_PASS();
}
static void test_seal_discard_ro_anon_on_rw(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address_rw(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* sealing doesn't take effect on RW memory. */
ret = sys_madvise(ptr, size, MADV_DONTNEED);
FAIL_TEST_IF_FALSE(!ret);
/* base seal still apply. */
ret = sys_munmap(ptr, size);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_discard_ro_anon_on_pkey(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
int pkey;
SKIP_TEST_IF_FALSE(pkey_supported());
setup_single_address_rw(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
pkey = sys_pkey_alloc(0, 0);
FAIL_TEST_IF_FALSE(pkey > 0);
ret = sys_mprotect_pkey((void *)ptr, size, PROT_READ | PROT_WRITE, pkey);
FAIL_TEST_IF_FALSE(!ret);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* sealing doesn't take effect if PKRU allow write. */
set_pkey(pkey, 0);
ret = sys_madvise(ptr, size, MADV_DONTNEED);
FAIL_TEST_IF_FALSE(!ret);
/* sealing will take effect if PKRU deny write. */
set_pkey(pkey, PKEY_DISABLE_WRITE);
ret = sys_madvise(ptr, size, MADV_DONTNEED);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
/* base seal still apply. */
ret = sys_munmap(ptr, size);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_discard_ro_anon_on_filebacked(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
int fd;
unsigned long mapflags = MAP_PRIVATE;
fd = memfd_create("test", 0);
FAIL_TEST_IF_FALSE(fd > 0);
ret = fallocate(fd, 0, 0, size);
FAIL_TEST_IF_FALSE(!ret);
ptr = sys_mmap(NULL, size, PROT_READ, mapflags, fd, 0);
FAIL_TEST_IF_FALSE(ptr != MAP_FAILED);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* sealing doesn't apply for file backed mapping. */
ret = sys_madvise(ptr, size, MADV_DONTNEED);
FAIL_TEST_IF_FALSE(!ret);
ret = sys_munmap(ptr, size);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
close(fd);
REPORT_TEST_PASS();
}
static void test_seal_discard_ro_anon_on_shared(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
unsigned long mapflags = MAP_ANONYMOUS | MAP_SHARED;
ptr = sys_mmap(NULL, size, PROT_READ, mapflags, -1, 0);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = sys_mseal(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
/* sealing doesn't apply for shared mapping. */
ret = sys_madvise(ptr, size, MADV_DONTNEED);
FAIL_TEST_IF_FALSE(!ret);
ret = sys_munmap(ptr, size);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
static void test_seal_discard_ro_anon(bool seal)
{
void *ptr;
unsigned long page_size = getpagesize();
unsigned long size = 4 * page_size;
int ret;
setup_single_address(size, &ptr);
FAIL_TEST_IF_FALSE(ptr != (void *)-1);
if (seal) {
ret = seal_single_address(ptr, size);
FAIL_TEST_IF_FALSE(!ret);
}
ret = sys_madvise(ptr, size, MADV_DONTNEED);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
ret = sys_munmap(ptr, size);
if (seal)
FAIL_TEST_IF_FALSE(ret < 0);
else
FAIL_TEST_IF_FALSE(!ret);
REPORT_TEST_PASS();
}
int main(int argc, char **argv)
{
bool test_seal = seal_support();
ksft_print_header();
if (!test_seal)
ksft_exit_skip("sealing not supported, check CONFIG_64BIT\n");
if (!pkey_supported())
ksft_print_msg("PKEY not supported\n");
ksft_set_plan(80);
test_seal_addseal();
test_seal_unmapped_start();
test_seal_unmapped_middle();
test_seal_unmapped_end();
test_seal_multiple_vmas();
test_seal_split_start();
test_seal_split_end();
test_seal_invalid_input();
test_seal_zero_length();
test_seal_twice();
test_seal_mprotect(false);
test_seal_mprotect(true);
test_seal_start_mprotect(false);
test_seal_start_mprotect(true);
test_seal_end_mprotect(false);
test_seal_end_mprotect(true);
test_seal_mprotect_unalign_len(false);
test_seal_mprotect_unalign_len(true);
test_seal_mprotect_unalign_len_variant_2(false);
test_seal_mprotect_unalign_len_variant_2(true);
test_seal_mprotect_two_vma(false);
test_seal_mprotect_two_vma(true);
test_seal_mprotect_two_vma_with_split(false);
test_seal_mprotect_two_vma_with_split(true);
test_seal_mprotect_partial_mprotect(false);
test_seal_mprotect_partial_mprotect(true);
test_seal_mprotect_two_vma_with_gap(false);
test_seal_mprotect_two_vma_with_gap(true);
test_seal_mprotect_merge(false);
test_seal_mprotect_merge(true);
test_seal_mprotect_split(false);
test_seal_mprotect_split(true);
test_seal_munmap(false);
test_seal_munmap(true);
test_seal_munmap_two_vma(false);
test_seal_munmap_two_vma(true);
test_seal_munmap_vma_with_gap(false);
test_seal_munmap_vma_with_gap(true);
test_munmap_start_freed(false);
test_munmap_start_freed(true);
test_munmap_middle_freed(false);
test_munmap_middle_freed(true);
test_munmap_end_freed(false);
test_munmap_end_freed(true);
test_seal_mremap_shrink(false);
test_seal_mremap_shrink(true);
test_seal_mremap_expand(false);
test_seal_mremap_expand(true);
test_seal_mremap_move(false);
test_seal_mremap_move(true);
test_seal_mremap_shrink_fixed(false);
test_seal_mremap_shrink_fixed(true);
test_seal_mremap_expand_fixed(false);
test_seal_mremap_expand_fixed(true);
test_seal_mremap_move_fixed(false);
test_seal_mremap_move_fixed(true);
test_seal_mremap_move_dontunmap(false);
test_seal_mremap_move_dontunmap(true);
test_seal_mremap_move_fixed_zero(false);
test_seal_mremap_move_fixed_zero(true);
test_seal_mremap_move_dontunmap_anyaddr(false);
test_seal_mremap_move_dontunmap_anyaddr(true);
test_seal_discard_ro_anon(false);
test_seal_discard_ro_anon(true);
test_seal_discard_ro_anon_on_rw(false);
test_seal_discard_ro_anon_on_rw(true);
test_seal_discard_ro_anon_on_shared(false);
test_seal_discard_ro_anon_on_shared(true);
test_seal_discard_ro_anon_on_filebacked(false);
test_seal_discard_ro_anon_on_filebacked(true);
test_seal_mmap_overwrite_prot(false);
test_seal_mmap_overwrite_prot(true);
test_seal_mmap_expand(false);
test_seal_mmap_expand(true);
test_seal_mmap_shrink(false);
test_seal_mmap_shrink(true);
test_seal_merge_and_split();
test_seal_zero_address();
test_seal_discard_ro_anon_on_pkey(false);
test_seal_discard_ro_anon_on_pkey(true);
ksft_finished();
}
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