linux-kernel - Re: arm64: fp-stress: BUG: KFENCE: memory corruption in fpsimd_release

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Message-ID: <e1473787-fe35-45e1-8897-551f99277122@sirena.org.uk>
Date:   Thu, 25 May 2023 14:47:13 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     Will Deacon <will@...nel.org>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        linux-stable <stable@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        lkft-triage@...ts.linaro.org,
        Catalin Marinas <catalin.marinas@....com>,
        Dan Carpenter <dan.carpenter@...aro.org>,
        Arnd Bergmann <arnd@...db.de>, Shuah Khan <shuah@...nel.org>,
        Anders Roxell <anders.roxell@...aro.org>
Subject: Re: arm64: fp-stress: BUG: KFENCE: memory corruption in
 fpsimd_release_task

On Thu, May 25, 2023 at 06:49:36PM +0530, Naresh Kamboju wrote:

> On Linux next this fp-stress BUG: has been happening *intermittently* from
> next-20230314 dated March 14, 2023.

A quick scan through shows no updates related to FP in the few weeks
preceeding that (quite few arm64 updates at all really).  This all seems
to match the pattern I mentioned when this was originally reported - it
does happen sometimes but there's some very thin race or something which
means it only comes up *very* rarely.  None of which is helpful for
figuring out what's going on :/

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