Merge branch 'master' of git://sourceware.org/git/glibc into upstreamupstream

1 files changed, 48 insertions, 0 deletions

diff --git a/malloc/tst-tcfree2.c b/malloc/tst-tcfree2.c
new file mode 100644
index 0000000000..9fd6e101d3
--- /dev/null
+++ b/malloc/tst-tcfree2.c
@@ -0,0 +1,48 @@
+/* Test that malloc tcache catches double free.
+   Copyright (C) 2018-2019 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 <errno.h>
+#include <error.h>
+#include <limits.h>
+#include <malloc.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/signal.h>
+
+static int
+do_test (void)
+{
+  char * volatile ptrs[20];
+  int i;
+
+  /* Allocate enough small chunks so that when we free them all, the tcache
+     is full, and the first one we freed is at the end of its linked list.  */
+#define COUNT 20
+  for (i=0; i<COUNT; i++)
+    ptrs[i] = malloc (20);
+  for (i=0; i<COUNT; i++)
+    free (ptrs[i]);
+  free (ptrs[0]);
+
+  printf("FAIL: tcache double free\n");
+  return 1;
+}
+
+#define TEST_FUNCTION do_test
+#define EXPECTED_SIGNAL SIGABRT
+#include <support/test-driver.c>