linux-kernel - LTS: proc: fix lookup in /proc/net subdirectories after setns(2)

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Date:   Fri, 8 Jan 2021 07:47:17 +0000
From:   "Rantala, Tommi T. (Nokia - FI/Espoo)" <tommi.t.rantala@...ia.com>
To:     "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "adobriyan@...il.com" <adobriyan@...il.com>
Subject: LTS: proc: fix lookup in /proc/net subdirectories after setns(2)

Hi Greg,

Can you cherry-pick these to 4.19.y & 5.4.y:

commit e06689bf57017ac022ccf0f2a5071f760821ce0f
Author: Alexey Dobriyan <adobriyan@...il.com>
Date:   Wed Dec 4 16:49:59 2019 -0800

    proc: change ->nlink under proc_subdir_lock

commit c6c75deda81344c3a95d1d1f606d5cee109e5d54
Author: Alexey Dobriyan <adobriyan@...il.com>
Date:   Tue Dec 15 20:42:39 2020 -0800

    proc: fix lookup in /proc/net subdirectories after setns(2)


-Tommi