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stdlib/tst-strtod-overflow: Switch to support_blob_repeat

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This is another test with an avoidable large memory allocation.

(cherry picked from commit 07da99aad9)
This commit is contained in:
Florian Weimer 2018-10-30 13:55:01 +01:00
parent 6c2b6e9e27
commit e1af1df694
2 changed files with 15 additions and 6 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2018-10-30 Florian Weimer <fweimer@redhat.com>
* stdlib/tst-strtod-overflow.c (do_test): Switch to
support_blob_repeat.
2018-10-30 Florian Weimer <fweimer@redhat.com>
* support/blob_repeat.c (allocate_big): Call mkstemp directly.

16
stdlib/tst-strtod-overflow.c
View File

@ -19,6 +19,8 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/blob_repeat.h>
#include <support/test-driver.h>
#define EXPONENT "e-2147483649"
#define SIZE 214748364
@ -26,21 +28,23 @@
static int
do_test (void)
{
char *p = malloc (1 + SIZE + sizeof (EXPONENT));
if (p == NULL)
struct support_blob_repeat repeat = support_blob_repeat_allocate
("0", 1, 1 + SIZE + sizeof (EXPONENT));
if (repeat.size == 0)
{
puts ("malloc failed, cannot test for overflow");
return 0;
puts ("warning: memory allocation failed, cannot test for overflow");
return EXIT_UNSUPPORTED;
}
char *p = repeat.start;
p[0] = '1';
memset (p + 1, '0', SIZE);
memcpy (p + 1 + SIZE, EXPONENT, sizeof (EXPONENT));
double d = strtod (p, NULL);
if (d != 0)
{
printf ("strtod returned wrong value: %a\n", d);
printf ("error: strtod returned wrong value: %a\n", d);
return 1;
}
support_blob_repeat_free (&repeat);
return 0;
}