linux-kernel - Regression: hibernation is broken since e6bc9de714972cac34daa1dc1567ee48a47a9342

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Message-ID: <20200213172351.GA6747@dumbo>
Date:   Thu, 13 Feb 2020 18:23:51 +0100
From:   Domenico Andreoli <domenico.andreoli@...ux.com>
To:     "Darrick J. Wong" <darrick.wong@...cle.com>,
        Christoph Hellwig <hch@....de>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Regression: hibernation is broken since
 e6bc9de714972cac34daa1dc1567ee48a47a9342

Hi,

  at some point between 5.2 and 5.3 my laptop started to refuse
hibernating and come back to a full functional state. It's fully 100%
reproducible, no oopses or any other damage to the state seems to happen.

It took me a while to follow the trail down to this commit. If I revert
it from v5.6-rc1, the hibernation is back as in the old times.


commit e6bc9de714972cac34daa1dc1567ee48a47a9342
Merge: b6c0d3577246 dc617f29dbe5
Author: Linus Torvalds <torvalds@...ux-foundation.org>
Date:   Wed Sep 18 17:35:20 2019 -0700

    Merge tag 'vfs-5.4-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux

    Pull swap access updates from Darrick Wong:
     "Prohibit writing to active swap files and swap partitions.

      There's no non-malicious use case for allowing userspace to scribble
      on storage that the kernel thinks it owns"

    * tag 'vfs-5.4-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
      vfs: don't allow writes to swap files
      mm: set S_SWAPFILE on blockdev swap devices


Is it possible to do anything?

Regards,
Domenico

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