linux-kernel - [PATCH 2/2] lib/test_printf: add test of null/invalid pointer dereference for dentry

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Date:   Fri,  9 Aug 2019 09:24:57 +0800
From:   Jia He <justin.he@....com>
To:     Petr Mladek <pmladek@...e.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Cc:     "Steven Rostedt (VMware)" <rostedt@...dmis.org>,
        Kees Cook <keescook@...omium.org>,
        Shuah Khan <shuah@...nel.org>,
        "Tobin C. Harding" <tobin@...nel.org>, Jia He <justin.he@....com>
Subject: [PATCH 2/2] lib/test_printf: add test of null/invalid pointer dereference for dentry

This add some additional test cases of null/invalid pointer dereference
for dentry and file (%pd and %pD)

Signed-off-by: Jia He <justin.he@....com>
---
 lib/test_printf.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/test_printf.c b/lib/test_printf.c
index 944eb50f3862..befedffeb476 100644
--- a/lib/test_printf.c
+++ b/lib/test_printf.c
@@ -455,6 +455,13 @@ dentry(void)
 	test("foo", "%pd", &test_dentry[0]);
 	test("foo", "%pd2", &test_dentry[0]);
 
+	/* test the null/invalid pointer case for dentry */
+	test("(null)", "%pd", NULL);
+	test("(efault)", "%pd", PTR_INVALID);
+	/* test the null/invalid pointer case for file */
+	test("(null)", "%pD", NULL);
+	test("(efault)", "%pD", PTR_INVALID);
+
 	test("romeo", "%pd", &test_dentry[3]);
 	test("alfa/romeo", "%pd2", &test_dentry[3]);
 	test("bravo/alfa/romeo", "%pd3", &test_dentry[3]);
-- 
2.17.1