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."
When running in a loop, it can trigger panic like this, if kernel
unpatched:
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
....
So I recommend to run it as 'thp01 -I xxx'.
v5: not using hard depend on /bin/true, use execvp() and "true" instead.
Signed-off-by: Pingtian Han <[email protected]>
Signed-off-by: Caspar Zhang <[email protected]>
---
runtest/mm | 2 +
testcases/kernel/mem/thp/Makefile | 23 +++++++
testcases/kernel/mem/thp/thp01.c | 124 +++++++++++++++++++++++++++++++++++++
3 files changed, 149 insertions(+), 0 deletions(-)
create mode 100644 testcases/kernel/mem/thp/Makefile
create mode 100644 testcases/kernel/mem/thp/thp01.c
diff --git a/runtest/mm b/runtest/mm
index f2d50d6..dded529 100644
--- a/runtest/mm
+++ b/runtest/mm
@@ -78,3 +78,5 @@ oom01 oom01
oom02 oom02
oom03 oom03
oom04 oom04
+
+thp01 thp01 -I 600
diff --git a/testcases/kernel/mem/thp/Makefile b/testcases/kernel/mem/thp/Makefile
new file mode 100644
index 0000000..d43511a
--- /dev/null
+++ b/testcases/kernel/mem/thp/Makefile
@@ -0,0 +1,23 @@
+#
+# Copyright (C) 2011 Red Hat, Inc.
+#
+# 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, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301, USA.
+#
+
+top_srcdir ?= ../../../..
+
+include $(top_srcdir)/include/mk/testcases.mk
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/mem/thp/thp01.c b/testcases/kernel/mem/thp/thp01.c
new file mode 100644
index 0000000..4432150
--- /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;
+}
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