Subject: Re: [PATCH v4 0/3] UBSAN: run-time undefined behavior sanity checker
To: Andrew Morton <akpm@linux-foundation.org>
References: <1449157807-20298-1-git-send-email-aryabinin@virtuozzo.com>
 <20151204163747.0bb51d61832ac75bfc73ce0c@linux-foundation.org>
CC: <linux-kernel@vger.kernel.org>, Peter Zijlstra <peterz@infradead.org>,
        Sasha Levin <sasha.levin@oracle.com>,
        Randy Dunlap <rdunlap@infradead.org>,
        Rasmus Villemoes <linux@rasmusvillemoes.dk>,
        Jonathan Corbet <corbet@lwn.net>, Michal Marek <mmarek@suse.cz>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        "H. Peter Anvin" <hpa@zytor.com>, Yury Gribov <y.gribov@samsung.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Konstantin Khlebnikov <koct9i@gmail.com>,
        Kostya Serebryany <kcc@google.com>, <x86@kernel.org>,
        <linux-doc@vger.kernel.org>, <linux-kbuild@vger.kernel.org>
From: Andrey Ryabinin <aryabinin@virtuozzo.com>
Message-ID: <5665B860.9040404@virtuozzo.com>
Date: Mon, 7 Dec 2015 19:48:32 +0300
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On 12/05/2015 03:37 AM, Andrew Morton wrote:
> On Thu, 3 Dec 2015 18:50:04 +0300 Andrey Ryabinin <aryabinin@virtuozzo.com> wrote:
> 
>> UBSAN is run-time undefined behaviour checker. It uses compile-time
>> instrumentation to catch undefined behavior (UB). Compiler inserts code
>> that perform certain kinds of checks before operations that could cause UB.
>> If check fails (i.e. UB detected) __ubsan_handle_* function called to print error message.
> 
> What I'd like to see in this changelog is a description of any kernel
> issues which this checker has already identified: what were they and
> what was their potential impact at runtime.
> 
> This info will help us to understand the value of the proposed feature.
> 

Sure, I'll come back soon with a list of found bugs.

> Thanks.
> 
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