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Diffstat (limited to 'elf/tst-env-setuid-tunables.c')
-rw-r--r--elf/tst-env-setuid-tunables.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/elf/tst-env-setuid-tunables.c b/elf/tst-env-setuid-tunables.c
new file mode 100644
index 0000000000..d7c4f0d574
--- /dev/null
+++ b/elf/tst-env-setuid-tunables.c
@@ -0,0 +1,75 @@
+/* Copyright (C) 2017-2018 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
+ <http://www.gnu.org/licenses/>. */
+
+/* Verify that tunables correctly filter out unsafe tunables like
+ glibc.malloc.check and glibc.malloc.mmap_threshold but also retain
+ glibc.malloc.mmap_threshold in an unprivileged child. */
+
+/* This is compiled as part of the testsuite but needs to see
+ HAVE_TUNABLES. */
+#define _LIBC 1
+#include "config.h"
+#undef _LIBC
+
+#define test_parent test_parent_tunables
+#define test_child test_child_tunables
+
+static int test_child_tunables (void);
+static int test_parent_tunables (void);
+
+#include "tst-env-setuid.c"
+
+#define CHILD_VALSTRING_VALUE "glibc.malloc.mmap_threshold=4096"
+#define PARENT_VALSTRING_VALUE \
+ "glibc.malloc.check=2:glibc.malloc.mmap_threshold=4096"
+
+static int
+test_child_tunables (void)
+{
+ const char *val = getenv ("GLIBC_TUNABLES");
+
+#if HAVE_TUNABLES
+ if (val != NULL && strcmp (val, CHILD_VALSTRING_VALUE) == 0)
+ return 0;
+
+ if (val != NULL)
+ printf ("Unexpected GLIBC_TUNABLES VALUE %s\n", val);
+
+ return 1;
+#else
+ if (val != NULL)
+ {
+ printf ("GLIBC_TUNABLES not cleared\n");
+ return 1;
+ }
+ return 0;
+#endif
+}
+
+static int
+test_parent_tunables (void)
+{
+ const char *val = getenv ("GLIBC_TUNABLES");
+
+ if (val != NULL && strcmp (val, PARENT_VALSTRING_VALUE) == 0)
+ return 0;
+
+ if (val != NULL)
+ printf ("Unexpected GLIBC_TUNABLES VALUE %s\n", val);
+
+ return 1;
+}