| /* |
| * Copyright (c) 2002, Intel Corporation. All rights reserved. |
| * Copyright (c) 2012, Cyril Hrubis <chrubis@suse.cz> |
| * |
| * This file is licensed under the GPL license. For the full content |
| * of this license, see the COPYING file at the top level of this |
| * source tree. |
| * |
| * The mmap() function shall fail if: |
| * [EOVERFLOW] The file is a regular file and the value of off |
| * plus len exceeds the offset maximum established in the open |
| * file description associated with fildes. |
| * |
| * Note: This error condition came to the standard with large |
| * file extension and cannot be triggered without it. |
| * |
| * So in order to trigger this we need 32 bit architecture |
| * and largefile support turned on. |
| */ |
| |
| #define _XOPEN_SOURCE 600 |
| |
| /* Turn on large file support, has no effect on 64 bit archs */ |
| #define _FILE_OFFSET_BITS 64 |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <limits.h> |
| #include <sys/mman.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/wait.h> |
| #include <fcntl.h> |
| #include <string.h> |
| #include <errno.h> |
| #include <sys/utsname.h> |
| #include "posixtest.h" |
| |
| int main(void) |
| { |
| char tmpfname[256]; |
| |
| void *pa; |
| size_t len; |
| int fd; |
| off_t off = 0; |
| |
| /* check for 64 bit arch */ |
| if (sizeof(void *) == 8) { |
| printf("USUPPORTED: Cannot be tested on 64 bit architecture\n"); |
| return PTS_UNSUPPORTED; |
| } |
| |
| /* The overflow does not happen when 32bit binary runs on 64bit kernel */ |
| #ifdef __linux__ |
| struct utsname buf; |
| |
| if (!uname(&buf) && strstr(buf.machine, "64")) { |
| printf("UNSUPPORTED: Looks like we run on 64bit kernel (%s)\n", |
| buf.machine); |
| return PTS_UNSUPPORTED; |
| } |
| |
| #endif /* __linux__ */ |
| |
| long page_size = sysconf(_SC_PAGE_SIZE); |
| |
| snprintf(tmpfname, sizeof(tmpfname), "/tmp/pts_mmap_31_1_%d", getpid()); |
| unlink(tmpfname); |
| fd = open(tmpfname, O_CREAT | O_RDWR | O_EXCL, S_IRUSR | S_IWUSR); |
| if (fd == -1) { |
| printf("Error at open(): %s\n", strerror(errno)); |
| return PTS_UNRESOLVED; |
| } |
| unlink(tmpfname); |
| |
| /* Set lenght to maximal multiple of page size */ |
| len = ~((size_t) 0) & (~(page_size - 1)); |
| |
| /* |
| * Now we need offset that fits into 32 bit |
| * value when divided by page size but is big |
| * enough so that offset + PAGE_ALIGN(len) / page_size |
| * overflows 32 bits. |
| */ |
| off = ((off_t) ~ ((size_t) 0)) * page_size; |
| off &= ~(page_size - 1); |
| |
| printf("off: %llx, len: %llx\n", (unsigned long long)off, |
| (unsigned long long)len); |
| |
| pa = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, off); |
| if (pa == MAP_FAILED && errno == EOVERFLOW) { |
| printf("Got EOVERFLOW\n"); |
| printf("Test PASSED\n"); |
| return PTS_PASS; |
| } |
| |
| if (pa == MAP_FAILED) |
| perror("Test FAILED: expect EOVERFLOW but get other error"); |
| else |
| printf("Test FAILED: Expect EOVERFLOW but got no error\n"); |
| |
| close(fd); |
| munmap(pa, len); |
| return PTS_FAIL; |
| } |