| /* |
| * Copyright (c) 2017 Richard Palethorpe <rpalethorpe@suse.com> |
| * Copyright (c) 2016 Jan Horn <jann@thejh.net> |
| * |
| * This program is free software: you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation, either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| /* |
| * Test for CVE-2016-10044, which was fixed in commit |
| * 22f6b4d34fcf039c aio: mark AIO pseudo-fs noexec. |
| * |
| * The test checks that we can not implicitly mark AIO mappings as |
| * executable using the READ_IMPLIES_EXEC personality. |
| */ |
| |
| #include <stdio.h> |
| #include <stdint.h> |
| #include <string.h> |
| #include "lapi/syscalls.h" |
| #include "lapi/personality.h" |
| #include "tst_test.h" |
| #include "tst_safe_stdio.h" |
| |
| static FILE *f; |
| |
| static void cleanup(void) |
| { |
| if (f) |
| SAFE_FCLOSE(f); |
| } |
| |
| static void run(void) |
| { |
| uint64_t ctx = 0; |
| char perms[8], line[BUFSIZ]; |
| |
| SAFE_PERSONALITY(READ_IMPLIES_EXEC); |
| if (tst_syscall(__NR_io_setup, 1, &ctx)) |
| tst_brk(TBROK | TERRNO, "Failed to create AIO context"); |
| |
| f = SAFE_FOPEN("/proc/self/maps", "r"); |
| while (fgets(line, BUFSIZ, f) != NULL) { |
| if (strstr(line, "/[aio]") != NULL) |
| goto found_mapping; |
| } |
| tst_brk(TBROK, "Could not find mapping in /proc/self/maps"); |
| |
| found_mapping: |
| if (sscanf(line, "%*x-%*x %s7", perms) < 0) |
| tst_brk(TBROK, "failed to find permission string in %s", line); |
| if (strchr(perms, (int)'x')) |
| tst_res(TFAIL, "AIO mapping is executable: %s!", perms); |
| else |
| tst_res(TPASS, "AIO mapping is not executable: %s", perms); |
| |
| SAFE_FCLOSE(f); |
| f = NULL; |
| } |
| |
| static struct tst_test test = { |
| .test_all = run, |
| .cleanup = cleanup, |
| .min_kver = "2.6.8", |
| }; |