From d3bf0bade622ccc51da2f66cea967101b6cc33fb Mon Sep 17 00:00:00 2001
From: Zack Weinberg <zackw@panix.com>
Date: Wed, 17 Aug 2016 10:05:43 -0400
Subject: Add tests for fortification of bcopy and bzero.

	* debug/tst-chk1.c: Add tests for fortification of bcopy and bzero.
---
 debug/tst-chk1.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)

(limited to 'debug')

diff --git a/debug/tst-chk1.c b/debug/tst-chk1.c
index 4f968ee..478c2fb 100644
--- a/debug/tst-chk1.c
+++ b/debug/tst-chk1.c
@@ -143,6 +143,11 @@ do_test (void)
   if (memcmp (buf, "aabcdefghi", 10))
     FAIL ();
 
+  memcpy (buf, "abcdefghij", 10);
+  bcopy (buf, buf + 1, 9);
+  if (memcmp (buf, "aabcdefghi", 10))
+    FAIL ();
+
   if (mempcpy (buf + 5, "abcde", 5) != buf + 10
       || memcmp (buf, "aabcdabcde", 10))
     FAIL ();
@@ -151,6 +156,10 @@ do_test (void)
   if (memcmp (buf, "aabcdabcjj", 10))
     FAIL ();
 
+  bzero (buf + 8, 2);
+  if (memcmp (buf, "aabcdabc\0\0", 10))
+    FAIL ();
+
   strcpy (buf + 4, "EDCBA");
   if (memcmp (buf, "aabcEDCBA", 10))
     FAIL ();
@@ -175,6 +184,11 @@ do_test (void)
   if (memcmp (buf, "aabcdefghi", 10))
     FAIL ();
 
+  memcpy (buf, "abcdefghij", l0 + 10);
+  bcopy (buf, buf + 1, l0 + 9);
+  if (memcmp (buf, "aabcdefghi", 10))
+    FAIL ();
+
   if (mempcpy (buf + 5, "abcde", l0 + 5) != buf + 10
       || memcmp (buf, "aabcdabcde", 10))
     FAIL ();
@@ -183,6 +197,10 @@ do_test (void)
   if (memcmp (buf, "aabcdabcjj", 10))
     FAIL ();
 
+  bzero (buf + 8, l0 + 2);
+  if (memcmp (buf, "aabcdabc\0\0", 10))
+    FAIL ();
+
   strcpy (buf + 4, str1 + 5);
   if (memcmp (buf, "aabcEDCBA", 10))
     FAIL ();
@@ -214,11 +232,18 @@ do_test (void)
   if (memcmp (buf, "aabcEcdZY", 10))
     FAIL ();
 
+  /* The following tests are supposed to succeed at all fortify
+     levels, even though they overflow a.buf1 into a.buf2.  */
   memcpy (a.buf1, "abcdefghij", l0 + 10);
   memmove (a.buf1 + 1, a.buf1, l0 + 9);
   if (memcmp (a.buf1, "aabcdefghi", 10))
     FAIL ();
 
+  memcpy (a.buf1, "abcdefghij", l0 + 10);
+  bcopy (a.buf1, a.buf1 + 1, l0 + 9);
+  if (memcmp (a.buf1, "aabcdefghi", 10))
+    FAIL ();
+
   if (mempcpy (a.buf1 + 5, "abcde", l0 + 5) != a.buf1 + 10
       || memcmp (a.buf1, "aabcdabcde", 10))
     FAIL ();
@@ -227,6 +252,10 @@ do_test (void)
   if (memcmp (a.buf1, "aabcdabcjj", 10))
     FAIL ();
 
+  bzero (a.buf1 + 8, l0 + 2);
+  if (memcmp (a.buf1, "aabcdabc\0\0", 10))
+    FAIL ();
+
 #if __USE_FORTIFY_LEVEL < 2
   /* The following tests are supposed to crash with -D_FORTIFY_SOURCE=2
      and sufficient GCC support, as the string operations overflow
@@ -285,6 +314,14 @@ do_test (void)
   CHK_FAIL_END
 
   CHK_FAIL_START
+  bcopy (buf + 1, buf + 2, 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bcopy (buf + 1, buf + 2, l0 + 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
   p = (char *) mempcpy (buf + 6, "abcde", 5);
   CHK_FAIL_END
 
@@ -301,6 +338,14 @@ do_test (void)
   CHK_FAIL_END
 
   CHK_FAIL_START
+  bzero (buf + 9, 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bzero (buf + 9, l0 + 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
   strcpy (buf + 5, str1 + 5);
   CHK_FAIL_END
 
@@ -378,6 +423,14 @@ do_test (void)
   CHK_FAIL_END
 
   CHK_FAIL_START
+  bcopy (a.buf1 + 1, a.buf1 + 2, 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bcopy (a.buf1 + 1, a.buf1 + 2, l0 + 9);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
   p = (char *) mempcpy (a.buf1 + 6, "abcde", 5);
   CHK_FAIL_END
 
@@ -393,6 +446,14 @@ do_test (void)
   memset (a.buf1 + 9, 'j', l0 + 2);
   CHK_FAIL_END
 
+  CHK_FAIL_START
+  bzero (a.buf1 + 9, 2);
+  CHK_FAIL_END
+
+  CHK_FAIL_START
+  bzero (a.buf1 + 9, l0 + 2);
+  CHK_FAIL_END
+
 # if __USE_FORTIFY_LEVEL >= 2
 #  define O 0
 # else
-- 
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