x86/vdso: Enable sanitizers for vma.o

The vDSO makefile opts out of all sanitizers (and objtool validation);
however, vma.o is a normal kernel object file (and already has objtool
validation selectively enabled), so turn the sanitizers back on for that
file.

Signed-off-by: Jann Horn <jannh@google.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Marco Elver <elver@google.com>
Cc: Paul E. McKenney <paulmck@kernel.org>
Link: https://lkml.kernel.org/r/20200106200204.94782-1-jannh@google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index 0f46273b45565621e0cd0a9bf81f92093c7a0faa..50a1c900886443d841c1b9195bda5b9df75b02a9 100644 (file)
--- a/arch/x86/entry/vdso/Makefile
+++ b/arch/x86/entry/vdso/Makefile
@@ -30,6 +30,9 @@ vobjs-y := vdso-note.o vclock_gettime.o vgetcpu.o
 
 # files to link into kernel
 obj-y                          += vma.o
+KASAN_SANITIZE_vma.o           := y
+UBSAN_SANITIZE_vma.o           := y
+KCSAN_SANITIZE_vma.o           := y
 OBJECT_FILES_NON_STANDARD_vma.o        := n
 
 # vDSO images to build