linux-kernel - [tip: locking/kcsan] x86/vdso: Enable sanitizers for vma.o

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Date:   Fri, 10 Jan 2020 15:49:42 -0000
From:   "tip-bot2 for Jann Horn" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Jann Horn <jannh@...gle.com>, Andy Lutomirski <luto@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Marco Elver <elver@...gle.com>,
        "Paul E. McKenney" <paulmck@...nel.org>,
        Ingo Molnar <mingo@...nel.org>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: locking/kcsan] x86/vdso: Enable sanitizers for vma.o

The following commit has been merged into the locking/kcsan branch of tip:

Commit-ID:     c29a59e43829beabc4c26036ebcc6a32dd0b6a01
Gitweb:        https://git.kernel.org/tip/c29a59e43829beabc4c26036ebcc6a32dd0b6a01
Author:        Jann Horn <jannh@...gle.com>
AuthorDate:    Mon, 06 Jan 2020 21:02:04 +01:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Fri, 10 Jan 2020 16:47:32 +01:00

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@...gle.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Marco Elver <elver@...gle.com>
Cc: Paul E. McKenney <paulmck@...nel.org>
Link: https://lkml.kernel.org/r/20200106200204.94782-1-jannh@google.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 arch/x86/entry/vdso/Makefile | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/x86/entry/vdso/Makefile b/arch/x86/entry/vdso/Makefile
index 0f46273..50a1c90 100644
--- 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