glibc/stdio-common/tst-printf-fp-free.c

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/* Test double free bug in __printf_fp_l (bug 26214).
Copyright (C) 2020-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <mcheck.h>
#include <stdio.h>
#include <sys/resource.h>
#include <support/check.h>
static int
do_test (void)
{
mtrace ();
FILE *fp = fopen ("/dev/full", "w");
TEST_VERIFY_EXIT (fp != NULL);
char buf[131072];
TEST_VERIFY_EXIT (setvbuf (fp, buf, _IOFBF, sizeof buf) == 0);
TEST_COMPARE (fprintf (fp, "%-1000000.65536f", 1.0), -1);
fclose (fp);
return 0;
}
#include <support/test-driver.c>