linux-kernel - Re: [RFC] mm/kasan: Add Allocation, Free, Error timestamps to KASAN report

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Message-ID: <eqinp4exznpgclzgz3ytjfdbpjffyyfn62dqfiaw2htk4ppa5p@ip25t7yczqc3>
Date:   Tue, 17 Oct 2023 17:10:14 -0300
From:   "Ricardo B. Marliere" <ricardo@...liere.net>
To:     Juntong Deng <juntong.deng@...look.com>
Cc:     ryabinin.a.a@...il.com, glider@...gle.com, andreyknvl@...il.com,
        dvyukov@...gle.com, vincenzo.frascino@....com,
        akpm@...ux-foundation.org, linux-mm@...ck.org,
        "linux-kernel-mentees@...ts.linuxfoundation.org" 
        <linux-kernel-mentees@...ts.linuxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        kasan-dev@...glegroups.com
Subject: Re: [RFC] mm/kasan: Add Allocation, Free, Error timestamps to KASAN
 report

On 23/10/18 03:39AM, Juntong Deng wrote:
> If the free time is slightly before the error time, then there is a
> high probability that this is an error caused by race condition.
> 
> If the free time is long before the error time, then this is obviously
> not caused by race condition, but by something else.

That sounds a bit arbitrary to me. How do you set the threshold for each
case? I mean, the fact remains: an invalid read after the object being
freed. Does it matter what it was caused by? It should be fixed
regardless.