[RFC 01/13] x86/paravirt: Turn KASAN off for parvirt.o

From	Andy Lutomirski <luto@kernel.org>
Newsgroups	linux.kernel
Subject	[RFC 01/13] x86/paravirt: Turn KASAN off for parvirt.o
Date	2016-01-09 00:20 +0100
Message-ID	<qOOu6-5ka-17@gated-at.bofh.it> (permalink)
References	<qOOu6-5ka-5@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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Otherwise terrible things happen if some of the callbacks end up
calling into KASAN in unexpected places.

This has no obvious symptoms yet, but adding a memory reference to
native_flush_tlb_global without this blows up on KASAN kernels.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
---
 arch/x86/kernel/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index b1b78ffe01d0..b7cd5bdf314b 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -19,6 +19,7 @@ endif
 KASAN_SANITIZE_head$(BITS).o := n
 KASAN_SANITIZE_dumpstack.o := n
 KASAN_SANITIZE_dumpstack_$(BITS).o := n
+KASAN_SANITIZE_paravirt.o := n
 
 CFLAGS_irq.o := -I$(src)/../include/asm/trace
 
-- 
2.5.0

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[RFC 01/13] x86/paravirt: Turn KASAN off for parvirt.o Andy Lutomirski <luto@kernel.org> - 2016-01-09 00:20 +0100
  Re: [RFC 01/13] x86/paravirt: Turn KASAN off for parvirt.o Borislav Petkov <bp@alien8.de> - 2016-01-10 20:10 +0100
    [PATCH 2/2] x86/kasan: write protect kasan zero shadow Andrey Ryabinin <aryabinin@virtuozzo.com> - 2016-01-11 14:00 +0100
    Re: [RFC 01/13] x86/paravirt: Turn KASAN off for parvirt.o Andrey Ryabinin <aryabinin@virtuozzo.com> - 2016-01-11 14:00 +0100
      [PATCH 1/2] x86/kasan: clear kasan_zero_page after TLB flush Andrey Ryabinin <aryabinin@virtuozzo.com> - 2016-01-11 14:00 +0100

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