netdev - Re: WARNING: refcount bug in should

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Message-ID: <20180403052009.GH30522@ZenIV.linux.org.uk>
Date:   Tue, 3 Apr 2018 06:20:09 +0100
From:   Al Viro <viro@...IV.linux.org.uk>
To:     "Eric W. Biederman" <ebiederm@...ssion.com>
Cc:     Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>,
        syzbot+@...kaller.appspotmail.com, syzkaller-bugs@...glegroups.com,
        dvyukov@...gle.com, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, netdev@...r.kernel.org
Subject: Re: WARNING: refcount bug in should_fail

On Mon, Apr 02, 2018 at 10:59:34PM +0100, Al Viro wrote:

> FWIW, I'm going through the ->kill_sb() instances, fixing that sort
> of bugs (most of them preexisting, but I should've checked instead
> of assuming that everything's fine).  Will push out later tonight.

OK, see vfs.git#for-linus.  Caught: 4 old bugs (allocation failure
in fill_super oopses ->kill_sb() in hypfs, jffs2 and orangefs resp.
and double-dput in late failure exit in rpc_fill_super())
and 5 regressions from register_shrinker() failure recovery.