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Add a test for BZ #15674

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H.J. Lu 2013-06-26 15:23:08 -07:00
parent fc74328c1f
commit bb5bb87cd2
2 changed files with 27 additions and 0 deletions
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3
ChangeLog
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@ -1,6 +1,9 @@
2013-06-26 Liubov Dmitrieva <liubov.dmitrieva@intel.com>
[BZ #15674]
* string/test-memcmp.c (check2): New.
(main): Call check2.
* sysdeps/x86_64/multiarch/memcmp-ssse3.S: Fix buffers overrun.
2013-06-26 Maciej W. Rozycki <macro@codesourcery.com>

24
string/test-memcmp.c
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@ -448,6 +448,29 @@ check1 (void)
}
}
/* This test checks that memcmp doesn't overrun buffers. */
static void
check2 (void)
{
size_t max_length = page_size / sizeof (CHAR);
/* Initialize buf2 to the same values as buf1. The bug requires the
last compared byte to be different. */
memcpy (buf2, buf1, page_size);
((char *) buf2)[page_size - 1] ^= 0x11;
for (size_t length = 1; length < max_length; length++)
{
CHAR *s1 = (CHAR *) buf1 + max_length - length;
CHAR *s2 = (CHAR *) buf2 + max_length - length;
const int exp_result = SIMPLE_MEMCMP (s1, s2, length);
FOR_EACH_IMPL (impl, 0)
check_result (impl, s1, s2, length, exp_result);
}
}
int
test_main (void)
{
@ -456,6 +479,7 @@ test_main (void)
test_init ();
check1 ();
check2 ();
printf ("%23s", "");
FOR_EACH_IMPL (impl, 0)