um: Enable FORTIFY_SOURCE

Enable FORTIFY_SOURCE so running Kunit tests can test fortified
functions.

Signed-off-by: Kees Cook <keescook@chromium.org>
Tested-by: David Gow <davidgow@google.com>
Link: https://lore.kernel.org/r/20220210003224.773957-1-keescook@chromium.org

diff --git a/arch/um/Kconfig b/arch/um/Kconfig
index 78de31a..ad4ff3b 100644 (file)
--- a/arch/um/Kconfig
+++ b/arch/um/Kconfig
@@ -6,6 +6,7 @@ config UML
        bool
        default y
        select ARCH_EPHEMERAL_INODES
+       select ARCH_HAS_FORTIFY_SOURCE
        select ARCH_HAS_GCOV_PROFILE_ALL
        select ARCH_HAS_KCOV
        select ARCH_HAS_STRNCPY_FROM_USER

diff --git a/arch/um/os-Linux/user_syms.c b/arch/um/os-Linux/user_syms.c
index cb667c9..fd575ec 100644 (file)
--- a/arch/um/os-Linux/user_syms.c
+++ b/arch/um/os-Linux/user_syms.c
@@ -1,4 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
+#define __NO_FORTIFY
 #include <linux/types.h>
 #include <linux/module.h>