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* [LTP] [PATCH] madvise05: new testcase for Oops in madvise_willneed
@ 2014-08-05 14:45 Jan Stancek
  2014-08-05 14:58 ` chrubis
  2014-08-05 17:53 ` Caspar Zhang
  0 siblings, 2 replies; 4+ messages in thread
From: Jan Stancek @ 2014-08-05 14:45 UTC (permalink / raw)
  To: ltp-list

This is a regression test for madvise(2) system call. It tests
kernel for NULL ptr deref Oops fixed by:
  commit ee53664bda169f519ce3c6a22d378f0b946c8178
  Author: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
  Date:   Fri Dec 20 15:10:03 2013 +0200
    mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support

Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
 runtest/syscalls                              |    1 +
 testcases/kernel/syscalls/.gitignore          |    1 +
 testcases/kernel/syscalls/madvise/madvise05.c |   81 +++++++++++++++++++++++++
 3 files changed, 83 insertions(+), 0 deletions(-)
 create mode 100644 testcases/kernel/syscalls/madvise/madvise05.c

diff --git a/runtest/syscalls b/runtest/syscalls
index 5e6e0f4..142c350 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -715,6 +715,7 @@ madvise01 madvise01
 madvise02 madvise02
 madvise03 madvise03
 madvise04 madvise04
+madvise05 madvise05
 
 newuname01 newuname01
 
diff --git a/testcases/kernel/syscalls/.gitignore b/testcases/kernel/syscalls/.gitignore
index fb2425e..fd52217 100644
--- a/testcases/kernel/syscalls/.gitignore
+++ b/testcases/kernel/syscalls/.gitignore
@@ -479,6 +479,7 @@
 /madvise/madvise02
 /madvise/madvise03
 /madvise/madvise04
+/madvise/madvise05
 /mallopt/mallopt01
 /mbind/mbind01
 /memcmp/memcmp01
diff --git a/testcases/kernel/syscalls/madvise/madvise05.c b/testcases/kernel/syscalls/madvise/madvise05.c
new file mode 100644
index 0000000..043eb4d
--- /dev/null
+++ b/testcases/kernel/syscalls/madvise/madvise05.c
@@ -0,0 +1,81 @@
+/*
+ *  Copyright (c) Linux Test Project, 2014
+ *
+ *  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 Library General Public License for more details.
+ */
+/*
+ * This is a regression test for madvise(2) system call. It tests kernel
+ * for NULL ptr deref Oops fixed by:
+ *   commit ee53664bda169f519ce3c6a22d378f0b946c8178
+ *   Author: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
+ *   Date:   Fri Dec 20 15:10:03 2013 +0200
+ *     mm: Fix NULL pointer dereference in madvise(MADV_WILLNEED) support
+ *
+ * On buggy kernel with CONFIG_DEBUG_LOCK_ALLOC=y this testcase should
+ * produce Oops and/or be killed. On fixed/good kernel this testcase
+ * runs to completion (retcode is 0)
+ */
+
+#include <sys/mman.h>
+#include <errno.h>
+
+#include "test.h"
+#include "usctest.h"
+#include "safe_macros.h"
+
+#define ALLOC_SIZE (32 * 1024 * 1024)
+
+static void setup(void);
+static void cleanup(void);
+
+char *TCID = "madvise05";
+int TST_TOTAL = 1;
+
+int main(int argc, char *argv[])
+{
+	int lc;
+	const char *msg = NULL;
+	void *p;
+
+	msg = parse_opts(argc, argv, NULL, NULL);
+	if (msg)
+		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
+
+	setup();
+
+	for (lc = 0; TEST_LOOPING(lc); lc++) {
+		p = SAFE_MMAP(cleanup, NULL, ALLOC_SIZE, PROT_READ,
+			MAP_PRIVATE | MAP_ANONYMOUS | MAP_POPULATE, -1, 0);
+		TEST(mprotect(p, ALLOC_SIZE, PROT_NONE));
+		if (TEST_RETURN == -1)
+			tst_brkm(TBROK | TTERRNO, cleanup, "mprotect failed");
+		TEST(madvise(p, ALLOC_SIZE, MADV_WILLNEED));
+		if (TEST_RETURN == -1)
+			tst_brkm(TBROK | TTERRNO, cleanup, "madvise failed");
+		SAFE_MUNMAP(cleanup, p, ALLOC_SIZE);
+	}
+
+	tst_resm(TPASS, "issue has not been reproduced");
+
+	cleanup();
+	tst_exit();
+}
+
+static void setup(void)
+{
+	tst_sig(NOFORK, DEF_HANDLER, cleanup);
+	TEST_PAUSE;
+}
+
+static void cleanup(void)
+{
+	TEST_CLEANUP;
+}
-- 
1.7.1


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^ permalink raw reply related	[flat|nested] 4+ messages in thread
end of thread, other threads:[~2014-08-06  7:43 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2014-08-05 14:45 [LTP] [PATCH] madvise05: new testcase for Oops in madvise_willneed Jan Stancek
2014-08-05 14:58 ` chrubis
2014-08-05 17:53 ` Caspar Zhang
2014-08-06  7:42   ` Jan Stancek

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