[PATCH] sparc: vdso: Disable UBSAN instrumentation

[Kees Cook]

The UBSAN instrumentation cannot work in the vDSO since it is executing
in userspace, so disable it in the Makefile. Fixes the build failures
such as:

arch/sparc/vdso/vclock_gettime.c:217: undefined reference to `__ubsan_handle_shift_out_of_bounds'

Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
---
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Andreas Larsson <andreas@xxxxxxxxxxx>
Cc: Masahiro Yamada <masahiroy@xxxxxxxxxx>
Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
Cc: Helge Deller <deller@xxxxxx>
Cc: Guo Ren <guoren@xxxxxxxxxx>
Cc: sparclinux@xxxxxxxxxxxxxxx
---
 arch/sparc/vdso/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/sparc/vdso/Makefile b/arch/sparc/vdso/Makefile
index 7f5eedf1f5e0..e8aef2c8ae99 100644
--- a/arch/sparc/vdso/Makefile
+++ b/arch/sparc/vdso/Makefile
@@ -2,6 +2,7 @@
 #
 # Building vDSO images for sparc.
 #
+UBSAN_SANITIZE := n
 
 # files to link into the vdso
 vobjs-y := vdso-note.o vclock_gettime.o
-- 
2.34.1