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Groups > linux.kernel > #1306160
| From | Andrey Ryabinin <aryabinin@virtuozzo.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [RFC 01/13] x86/paravirt: Turn KASAN off for parvirt.o |
| Date | 2016-01-11 14:00 +0100 |
| Message-ID | <qPKeK-2wl-3@gated-at.bofh.it> (permalink) |
| References | <qPtxg-8hk-17@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 01/10/2016 09:59 PM, Borislav Petkov wrote: > + Andrey. > > On Fri, Jan 08, 2016 at 03:15:19PM -0800, Andy Lutomirski wrote: >> 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 > > Shouldn't we take this one irrespectively of what happens to the rest in > the patchset? > I don't think that this patch is the right way to solve the problem. The follow-up patch "x86/kasan: clear kasan_zero_page after TLB flush" should fix Andy's problem.
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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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