diff options
Diffstat (limited to 'contrib/netbsd-tests/lib/libc/sys/t_mmap.c')
| -rw-r--r-- | contrib/netbsd-tests/lib/libc/sys/t_mmap.c | 505 |
1 files changed, 505 insertions, 0 deletions
diff --git a/contrib/netbsd-tests/lib/libc/sys/t_mmap.c b/contrib/netbsd-tests/lib/libc/sys/t_mmap.c new file mode 100644 index 0000000..c6b97b1 --- /dev/null +++ b/contrib/netbsd-tests/lib/libc/sys/t_mmap.c @@ -0,0 +1,505 @@ +/* $NetBSD: t_mmap.c,v 1.7 2012/06/14 17:47:58 bouyer Exp $ */ + +/*- + * Copyright (c) 2011 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Jukka Ruohonen. + * + * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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. + */ + +/*- + * Copyright (c)2004 YAMAMOTO Takashi, + * All rights reserved. + * + * 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> +__RCSID("$NetBSD: t_mmap.c,v 1.7 2012/06/14 17:47:58 bouyer Exp $"); + +#include <sys/param.h> +#include <sys/mman.h> +#include <sys/socket.h> +#include <sys/sysctl.h> +#include <sys/wait.h> + +#include <atf-c.h> +#include <errno.h> +#include <fcntl.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <paths.h> +#include <machine/disklabel.h> + +static long page = 0; +static char path[] = "mmap"; +static void map_check(void *, int); +static void map_sighandler(int); +static void testloan(void *, void *, char, int); + +#define BUFSIZE (32 * 1024) /* enough size to trigger sosend_loan */ + +static void +map_check(void *map, int flag) +{ + + if (flag != 0) { + ATF_REQUIRE(map == MAP_FAILED); + return; + } + + ATF_REQUIRE(map != MAP_FAILED); + ATF_REQUIRE(munmap(map, page) == 0); +} + +void +testloan(void *vp, void *vp2, char pat, int docheck) +{ + char buf[BUFSIZE]; + char backup[BUFSIZE]; + ssize_t nwritten; + ssize_t nread; + int fds[2]; + int val; + + val = BUFSIZE; + + if (docheck != 0) + (void)memcpy(backup, vp, BUFSIZE); + + if (socketpair(AF_LOCAL, SOCK_STREAM, PF_UNSPEC, fds) != 0) + atf_tc_fail("socketpair() failed"); + + val = BUFSIZE; + + if (setsockopt(fds[1], SOL_SOCKET, SO_RCVBUF, &val, sizeof(val)) != 0) + atf_tc_fail("setsockopt() failed, SO_RCVBUF"); + + val = BUFSIZE; + + if (setsockopt(fds[0], SOL_SOCKET, SO_SNDBUF, &val, sizeof(val)) != 0) + atf_tc_fail("setsockopt() failed, SO_SNDBUF"); + + if (fcntl(fds[0], F_SETFL, O_NONBLOCK) != 0) + atf_tc_fail("fcntl() failed"); + + nwritten = write(fds[0], (char *)vp + page, BUFSIZE - page); + + if (nwritten == -1) + atf_tc_fail("write() failed"); + + /* Break loan. */ + (void)memset(vp2, pat, BUFSIZE); + + nread = read(fds[1], buf + page, BUFSIZE - page); + + if (nread == -1) + atf_tc_fail("read() failed"); + + if (nread != nwritten) + atf_tc_fail("too short read"); + + if (docheck != 0 && memcmp(backup, buf + page, nread) != 0) + atf_tc_fail("data mismatch"); + + ATF_REQUIRE(close(fds[0]) == 0); + ATF_REQUIRE(close(fds[1]) == 0); +} + +static void +map_sighandler(int signo) +{ + _exit(signo); +} + +ATF_TC(mmap_block); +ATF_TC_HEAD(mmap_block, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test mmap(2) with a block device"); + atf_tc_set_md_var(tc, "require.user", "root"); +} + +ATF_TC_BODY(mmap_block, tc) +{ + static const int mib[] = { CTL_HW, HW_DISKNAMES }; + static const unsigned int miblen = __arraycount(mib); + char *map, *dk, *drives, dev[PATH_MAX]; + size_t len; + int fd = -1; + + atf_tc_skip("The test case causes a panic (PR kern/38889, kern/46592)"); + + ATF_REQUIRE(sysctl(mib, miblen, NULL, &len, NULL, 0) == 0); + drives = malloc(len); + ATF_REQUIRE(drives != NULL); + ATF_REQUIRE(sysctl(mib, miblen, drives, &len, NULL, 0) == 0); + for (dk = strtok(drives, " "); dk != NULL; dk = strtok(NULL, " ")) { + sprintf(dev, _PATH_DEV "%s%c", dk, 'a'+RAW_PART); + fprintf(stderr, "trying: %s\n", dev); + + if ((fd = open(dev, O_RDONLY)) >= 0) { + (void)fprintf(stderr, "using %s\n", dev); + break; + } + } + free(drives); + + if (fd < 0) + atf_tc_skip("failed to find suitable block device"); + + map = mmap(NULL, 4096, PROT_READ, MAP_FILE, fd, 0); + ATF_REQUIRE(map != MAP_FAILED); + + (void)fprintf(stderr, "first byte %x\n", *map); + ATF_REQUIRE(close(fd) == 0); + (void)fprintf(stderr, "first byte %x\n", *map); + + ATF_REQUIRE(munmap(map, 4096) == 0); +} + +ATF_TC(mmap_err); +ATF_TC_HEAD(mmap_err, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test error conditions of mmap(2)"); +} + +ATF_TC_BODY(mmap_err, tc) +{ + size_t addr = SIZE_MAX; + void *map; + + errno = 0; + map = mmap(NULL, 3, PROT_READ, MAP_FILE|MAP_PRIVATE, -1, 0); + + ATF_REQUIRE(map == MAP_FAILED); + ATF_REQUIRE(errno == EBADF); + + errno = 0; + map = mmap(&addr, page, PROT_READ, MAP_FIXED|MAP_PRIVATE, -1, 0); + + ATF_REQUIRE(map == MAP_FAILED); + ATF_REQUIRE(errno == EINVAL); + + errno = 0; + map = mmap(NULL, page, PROT_READ, MAP_ANON|MAP_PRIVATE, INT_MAX, 0); + + ATF_REQUIRE(map == MAP_FAILED); + ATF_REQUIRE(errno == EINVAL); +} + +ATF_TC_WITH_CLEANUP(mmap_loan); +ATF_TC_HEAD(mmap_loan, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test uvm page loanout with mmap(2)"); +} + +ATF_TC_BODY(mmap_loan, tc) +{ + char buf[BUFSIZE]; + char *vp, *vp2; + int fd; + + fd = open(path, O_RDWR | O_CREAT, 0600); + ATF_REQUIRE(fd >= 0); + + (void)memset(buf, 'x', sizeof(buf)); + (void)write(fd, buf, sizeof(buf)); + + vp = mmap(NULL, BUFSIZE, PROT_READ | PROT_WRITE, + MAP_FILE | MAP_PRIVATE, fd, 0); + + ATF_REQUIRE(vp != MAP_FAILED); + + vp2 = vp; + + testloan(vp, vp2, 'A', 0); + testloan(vp, vp2, 'B', 1); + + ATF_REQUIRE(munmap(vp, BUFSIZE) == 0); + + vp = mmap(NULL, BUFSIZE, PROT_READ | PROT_WRITE, + MAP_FILE | MAP_SHARED, fd, 0); + + vp2 = mmap(NULL, BUFSIZE, PROT_READ | PROT_WRITE, + MAP_FILE | MAP_SHARED, fd, 0); + + ATF_REQUIRE(vp != MAP_FAILED); + ATF_REQUIRE(vp2 != MAP_FAILED); + + testloan(vp, vp2, 'E', 1); + + ATF_REQUIRE(munmap(vp, BUFSIZE) == 0); + ATF_REQUIRE(munmap(vp2, BUFSIZE) == 0); +} + +ATF_TC_CLEANUP(mmap_loan, tc) +{ + (void)unlink(path); +} + +ATF_TC_WITH_CLEANUP(mmap_prot_1); +ATF_TC_HEAD(mmap_prot_1, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test mmap(2) protections, #1"); +} + +ATF_TC_BODY(mmap_prot_1, tc) +{ + void *map; + int fd; + + /* + * Open a file write-only and try to + * map it read-only. This should fail. + */ + fd = open(path, O_WRONLY | O_CREAT, 0700); + + if (fd < 0) + return; + + ATF_REQUIRE(write(fd, "XXX", 3) == 3); + + map = mmap(NULL, 3, PROT_READ, MAP_FILE|MAP_PRIVATE, fd, 0); + map_check(map, 1); + + map = mmap(NULL, 3, PROT_WRITE, MAP_FILE|MAP_PRIVATE, fd, 0); + map_check(map, 0); + + ATF_REQUIRE(close(fd) == 0); +} + +ATF_TC_CLEANUP(mmap_prot_1, tc) +{ + (void)unlink(path); +} + +ATF_TC(mmap_prot_2); +ATF_TC_HEAD(mmap_prot_2, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test mmap(2) protections, #2"); +} + +ATF_TC_BODY(mmap_prot_2, tc) +{ + char buf[2]; + void *map; + pid_t pid; + int sta; + + /* + * Make a PROT_NONE mapping and try to access it. + * If we catch a SIGSEGV, all works as expected. + */ + map = mmap(NULL, page, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0); + ATF_REQUIRE(map != MAP_FAILED); + + pid = fork(); + ATF_REQUIRE(pid >= 0); + + if (pid == 0) { + ATF_REQUIRE(signal(SIGSEGV, map_sighandler) != SIG_ERR); + ATF_REQUIRE(strlcpy(buf, map, sizeof(buf)) != 0); + } + + (void)wait(&sta); + + ATF_REQUIRE(WIFEXITED(sta) != 0); + ATF_REQUIRE(WEXITSTATUS(sta) == SIGSEGV); + ATF_REQUIRE(munmap(map, page) == 0); +} + +ATF_TC_WITH_CLEANUP(mmap_prot_3); +ATF_TC_HEAD(mmap_prot_3, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test mmap(2) protections, #3"); +} + +ATF_TC_BODY(mmap_prot_3, tc) +{ + char buf[2]; + int fd, sta; + void *map; + pid_t pid; + + /* + * Open a file, change the permissions + * to read-only, and try to map it as + * PROT_NONE. This should succeed, but + * the access should generate SIGSEGV. + */ + fd = open(path, O_RDWR | O_CREAT, 0700); + + if (fd < 0) + return; + + ATF_REQUIRE(write(fd, "XXX", 3) == 3); + ATF_REQUIRE(close(fd) == 0); + ATF_REQUIRE(chmod(path, 0444) == 0); + + fd = open(path, O_RDONLY); + ATF_REQUIRE(fd != -1); + + map = mmap(NULL, 3, PROT_NONE, MAP_FILE | MAP_SHARED, fd, 0); + ATF_REQUIRE(map != MAP_FAILED); + + pid = fork(); + + ATF_REQUIRE(pid >= 0); + + if (pid == 0) { + ATF_REQUIRE(signal(SIGSEGV, map_sighandler) != SIG_ERR); + ATF_REQUIRE(strlcpy(buf, map, sizeof(buf)) != 0); + } + + (void)wait(&sta); + + ATF_REQUIRE(WIFEXITED(sta) != 0); + ATF_REQUIRE(WEXITSTATUS(sta) == SIGSEGV); + ATF_REQUIRE(munmap(map, 3) == 0); +} + +ATF_TC_CLEANUP(mmap_prot_3, tc) +{ + (void)unlink(path); +} + +ATF_TC_WITH_CLEANUP(mmap_truncate); +ATF_TC_HEAD(mmap_truncate, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test mmap(2) and ftruncate(2)"); +} + +ATF_TC_BODY(mmap_truncate, tc) +{ + char *map; + long i; + int fd; + + fd = open(path, O_RDWR | O_CREAT, 0700); + + if (fd < 0) + return; + + /* + * See that ftruncate(2) works + * while the file is mapped. + */ + ATF_REQUIRE(ftruncate(fd, page) == 0); + + map = mmap(NULL, page, PROT_READ | PROT_WRITE, MAP_FILE|MAP_PRIVATE, + fd, 0); + ATF_REQUIRE(map != MAP_FAILED); + + for (i = 0; i < page; i++) + map[i] = 'x'; + + ATF_REQUIRE(ftruncate(fd, 0) == 0); + ATF_REQUIRE(ftruncate(fd, page / 8) == 0); + ATF_REQUIRE(ftruncate(fd, page / 4) == 0); + ATF_REQUIRE(ftruncate(fd, page / 2) == 0); + ATF_REQUIRE(ftruncate(fd, page / 12) == 0); + ATF_REQUIRE(ftruncate(fd, page / 64) == 0); + + ATF_REQUIRE(close(fd) == 0); +} + +ATF_TC_CLEANUP(mmap_truncate, tc) +{ + (void)unlink(path); +} + +ATF_TC(mmap_va0); +ATF_TC_HEAD(mmap_va0, tc) +{ + atf_tc_set_md_var(tc, "descr", "Test mmap(2) and vm.user_va0_disable"); +} + +ATF_TC_BODY(mmap_va0, tc) +{ + int flags = MAP_ANON | MAP_FIXED | MAP_PRIVATE; + size_t len = sizeof(int); + void *map; + int val; + + /* + * Make an anonymous fixed mapping at zero address. If the address + * is restricted as noted in security(7), the syscall should fail. + */ + if (sysctlbyname("vm.user_va0_disable", &val, &len, NULL, 0) != 0) + atf_tc_fail("failed to read vm.user_va0_disable"); + + map = mmap(NULL, page, PROT_EXEC, flags, -1, 0); + map_check(map, val); + + map = mmap(NULL, page, PROT_READ, flags, -1, 0); + map_check(map, val); + + map = mmap(NULL, page, PROT_WRITE, flags, -1, 0); + map_check(map, val); + + map = mmap(NULL, page, PROT_READ|PROT_WRITE, flags, -1, 0); + map_check(map, val); + + map = mmap(NULL, page, PROT_EXEC|PROT_READ|PROT_WRITE, flags, -1, 0); + map_check(map, val); +} + +ATF_TP_ADD_TCS(tp) +{ + page = sysconf(_SC_PAGESIZE); + ATF_REQUIRE(page >= 0); + + ATF_TP_ADD_TC(tp, mmap_block); + ATF_TP_ADD_TC(tp, mmap_err); + ATF_TP_ADD_TC(tp, mmap_loan); + ATF_TP_ADD_TC(tp, mmap_prot_1); + ATF_TP_ADD_TC(tp, mmap_prot_2); + ATF_TP_ADD_TC(tp, mmap_prot_3); + ATF_TP_ADD_TC(tp, mmap_truncate); + ATF_TP_ADD_TC(tp, mmap_va0); + + return atf_no_error(); +} |
