diff options
Diffstat (limited to 'testcases/kernel/mem/thp/thp01.c')
-rw-r--r-- | testcases/kernel/mem/thp/thp01.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/testcases/kernel/mem/thp/thp01.c b/testcases/kernel/mem/thp/thp01.c new file mode 100644 index 000000000..6c7cce38a --- /dev/null +++ b/testcases/kernel/mem/thp/thp01.c @@ -0,0 +1,124 @@ +/* + * This is a reproducer of CVE-2011-0999, which fixed by mainline commit + * a7d6e4ecdb7648478ddec76d30d87d03d6e22b31: + * + * "Transparent hugepages can only be created if rmap is fully + * functional. So we must prevent hugepages to be created while + * is_vma_temporary_stack() is true." + * + * It will cause a panic something like this, if the patch didn't get + * applied: + * + * kernel BUG at mm/huge_memory.c:1260! + * invalid opcode: 0000 [#1] SMP + * last sysfs file: /sys/devices/system/cpu/cpu23/cache/index2/shared_cpu_map + * .... + * + * Copyright (C) 2011 Red Hat, Inc. + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + * Further, this software is distributed without any warranty that it + * is free of the rightful claim of any third person regarding + * infringement or the like. Any license provided herein, whether + * implied or otherwise, applies only to this software file. Patent + * licenses, if any, provided herein do not apply to combinations of + * this program with other software, or any other product whatsoever. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA + * 02110-1301, USA. + */ + +#include <sys/types.h> +#include <sys/resource.h> +#include <sys/wait.h> +#include <stdio.h> +#include <string.h> +#include <unistd.h> +#include "test.h" +#include "usctest.h" +#include "config.h" + +char *TCID = "thp01"; +int TST_TOTAL = 1; + +#define ARRAY_SZ 256 + +static int ps; +static long length; +static char *array[ARRAY_SZ]; +static char *arg; +static struct rlimit rl = { + .rlim_cur = RLIM_INFINITY, + .rlim_max = RLIM_INFINITY, +}; + +static void setup(void); +static void cleanup(void); + +int main(int argc, char **argv) +{ + int i, lc, st; + pid_t pid; + char *msg; + + msg = parse_opts(argc, argv, NULL, NULL); + if (msg != NULL) + tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); + + setup(); + + for (lc = 0; TEST_LOOPING(lc); lc++) { + switch (pid = fork()) { + case -1: + tst_brkm(TBROK|TERRNO, cleanup, "fork"); + case 0: + memset(arg, 'c', length - 1); + arg[length - 1] = '\0'; + for (i = 0; i < ARRAY_SZ - 1; i++) + array[i] = arg; + array[ARRAY_SZ - 1] = NULL; + if (setrlimit(RLIMIT_STACK, &rl) == -1) { + perror("setrlimit"); + exit(1); + } + if (execvp("true", array) == -1) { + perror("execvp"); + exit(1); + } + default: + if (waitpid(pid, &st, 0) == -1) + tst_brkm(TBROK|TERRNO, cleanup, "waitpid"); + if (!WIFEXITED(st) || WEXITSTATUS(st) != 0) + tst_brkm(TBROK, cleanup, + "child exited abnormally"); + } + } + tst_resm(TPASS, "system didn't crash, pass."); + cleanup(); + tst_exit(); +} + +static void setup(void) +{ + ps = sysconf(_SC_PAGESIZE); + length = 32 * ps; + arg = malloc(length); + if (arg == NULL) + tst_brkm(TBROK|TERRNO, NULL, "malloc"); + + tst_sig(FORK, DEF_HANDLER, cleanup); + TEST_PAUSE; +} + +static void cleanup(void) +{ + TEST_CLEANUP; +} |