netdev - Re: WARNING: refcount bug in should

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Date:   Wed, 04 Apr 2018 10:54:17 -0500
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Al Viro <viro@...IV.linux.org.uk>
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

Al Viro <viro@...IV.linux.org.uk> writes:

> 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.

One issue with your vfs.git#for-linus branch.

It is missing Fixes tags and  Cc: stable on those patches.
As the bug came in v4.15 those tags would really help the stable
maintainers get the recent regression fixes applied.

Eric