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To: Sasha Levin <sasha.levin@oracle.com>,
        Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>, Dmitry Vyukov <dvyukov@google.com>,
        Konstantin Serebryany <kcc@google.com>,
        Dmitry Chernenkov <dmitryc@google.com>,
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        Konstantin Khlebnikov <koct9i@gmail.com>,
        Michal Marek <mmarek@suse.cz>, Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, Christoph Lameter <cl@linux.com>,
        Pekka Enberg <penberg@kernel.org>,
        David Rientjes <rientjes@google.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>,
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        Randy Dunlap <rdunlap@infradead.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Dave Jones <davej@redhat.com>, Jonathan Corbet <corbet@lwn.net>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Catalin Marinas <catalin.marinas@arm.com>
Subject: Re: [PATCH v9 00/17] Kernel address sanitizer - runtime memory
 debugger.
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On 01/23/2015 12:46 AM, Sasha Levin wrote:
> Just to keep it going, here's a funny trace where kasan is catching issues
> in ubsan: :)
> 

Thanks, it turns out to be a GCC bug:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64741

As a workaround you could put kasan_disable_local()/kasan_enable_local()
into ubsan_prologue()/ubsan_epilogue().