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Date: Tue, 19 Dec 2017 15:34:19 +0000
From: Al Viro <viro@ZenIV.linux.org.uk>
To: Michal Hocko <mhocko@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
        Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
        Aliaksei Karaliou <akaraliou.dev@gmail.com>, linux-mm@kvack.org,
        linux-fsdevel@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [resend PATCH 0/2] fix VFS register_shrinker fixup
Message-ID: <20171219153418.GR21978@ZenIV.linux.org.uk>
References: <20171219132844.28354-1-mhocko@kernel.org>
 <20171219151915.GA2787@dhcp22.suse.cz>
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On Tue, Dec 19, 2017 at 04:19:15PM +0100, Michal Hocko wrote:
> Dohh, I have missed resend by Tetsuo http://lkml.kernel.org/r/1513596701-4518-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp
> (thanks for dropping me from the CC).  Al seeemed to take the patch. We
> still need patch 2. Al, are you going to take it from this thread or you
> are going to go your way?

Umm... git log for-linus in vfs.git since yesterday:

commit 9ee332d99e4d5a97548943b81c54668450ce641b
Author: Al Viro <viro@zeniv.linux.org.uk>
Date:   Mon Dec 18 15:05:07 2017 -0500

    sget(): handle failures of register_shrinker()
    
    Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

commit bb422a738f6566f7439cd347d54e321e4fe92a9f
Author: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Date:   Mon Dec 18 20:31:41 2017 +0900

    mm,vmscan: Make unregister_shrinker() no-op if register_shrinker() failed.
    
    Syzbot caught an oops at unregister_shrinker() because combination of
    commit 1d3d4437eae1bb29 ("vmscan: per-node deferred work") and fault
    injection made register_shrinker() fail and the caller of
    register_shrinker() did not check for failure.
....