linux-kernel - Re: [PATCH AUTOSEL 5.10 20/31] um: allocate a guard page to helper threads

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Message-ID: <d17899cc72a31f12da166de6223338b844ee2428.camel@sipsolutions.net>
Date:   Wed, 30 Dec 2020 15:48:57 +0100
From:   Johannes Berg <johannes@...solutions.net>
To:     Sasha Levin <sashal@...nel.org>, linux-kernel@...r.kernel.org,
        stable@...r.kernel.org
Cc:     Richard Weinberger <richard@....at>, linux-um@...ts.infradead.org
Subject: Re: [PATCH AUTOSEL 5.10 20/31] um: allocate a guard page to helper
 threads

On Wed, 2020-12-30 at 08:03 -0500, Sasha Levin wrote:
> 
> We've been running into stack overflows in helper threads
> corrupting memory

For the record, that was mostly referring to "while development", so
while this change makes a few things a bit safer, I don't think there's
all that much point in backporting to stable; presumably things are
working OK there for people, and developers will (hopefully) be working
on mainline anyway.

johannes