linux-kernel - Re: WARNING: at mm/gup.c:1101 __get_user

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Message-ID: <8fbc7879-09b2-4b1c-86e0-f8835b675843@t-8ch.de>
Date:   Sun, 23 Jul 2023 22:34:49 +0200
From:   Thomas Weißschuh <thomas@...ch.de>
To:     Wei Shuyu <wsy@...ben.com>
Cc:     ilkka.prusi@...il.com, linux-kernel@...r.kernel.org
Subject: Re: WARNING: at mm/gup.c:1101 __get_user_pages in 6.4.3

On 2023-07-24 02:41:24+0800, Wei Shuyu wrote:
> I can trigger this reliably by visiting chrome://crash/
> 
> [  444.608793] ------------[ cut here ]------------
> [  444.608795] WARNING: CPU: 7 PID: 901 at mm/gup.c:1101

This should be the same as 
https://lore.kernel.org/lkml/202307041023.bcdbbfc0-oliver.sang@intel.com/

Which was triaged to the chrome crashpad library.

The false positive is also fixed on master with
commit 6cd06ab12d1a ("gup: make the stack expansion warning a bit more targeted").

> [..]