1 files changed, 48 insertions, 0 deletions
diff --git a/malloc/tst-pvalloc-fortify.c b/malloc/tst-pvalloc-fortify.c
new file mode 100644
index 0000000000..391b7fa2f5
--- /dev/null
+++ b/malloc/tst-pvalloc-fortify.c
@@ -0,0 +1,48 @@
+/* Test fortify-source allocation size handling in pvalloc (bug 25401).
+   Copyright (C) 2020 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; see the file COPYING.LIB.  If
+   not, see <https://www.gnu.org/licenses/>.  */
+
+#undef _FORTIFY_SOURCE
+#define _FORTIFY_SOURCE 2
+#include <malloc.h>
+#include <string.h>
+#include <support/check.h>
+#include <support/xunistd.h>
+#include <unistd.h>
+
+static int
+do_test (void)
+{
+  /* The test below assumes that pvalloc rounds up the allocation size
+     to at least 8.  */
+  TEST_VERIFY (xsysconf (_SC_PAGESIZE) >= 8);
+
+  void *p = pvalloc (5);
+  TEST_VERIFY_EXIT (p != NULL);
+
+  /* This is valid assuming the page size is at least 8 because
+     pvalloc rounds up the allocation size to a multiple of the page
+     size.  Due to bug 25041, this used to trigger a compiler
+     warning.  */
+  strcpy (p, "abcdefg");
+
+  asm ("" : : "g" (p) : "memory"); /* Optimization barrier.  */
+  TEST_VERIFY (malloc_usable_size (p) >= xsysconf (_SC_PAGESIZE));
+  return 0;
+}
+
+#include <support/test-driver.c>