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Message-ID: <YY9WKU/cnQI4xqNE@qian-HP-Z2-SFF-G5-Workstation>
Date:   Sat, 13 Nov 2021 01:07:37 -0500
From:   Qian Cai <quic_qiancai@...cinc.com>
To:     Will Deacon <will@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Mark Rutland <mark.rutland@....com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        <linux-kernel@...r.kernel.org>, <kasan-dev@...glegroups.com>,
        Valentin Schneider <valentin.schneider@....com>
Subject: Re: KASAN + CPU soft-hotplug = stack-out-of-bounds at
 cpuinfo_store_cpu

On Fri, Nov 12, 2021 at 11:50:19PM -0500, Qian Cai wrote:
> FYI, running CPU soft-hotplug with KASAN on arm64 defconfig will
> always trigger a stack-out-of-bounds below.

Actually, KASAN is not enough to trigger. It needs some addition
debugging options to reproduce. I'll narrow it down later. Anyway,
this one will reproduce.

http://lsbug.org/tmp/config-bad-14rc1.txt

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