linux-kernel - Re: BUG warnings in 4.14.9

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Message-ID: <20171227125731.GA5771@kroah.com>
Date:   Wed, 27 Dec 2017 13:57:31 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     alexander.levin@...izon.com
Cc:     Ido Schimmel <idosch@...sch.org>, Willy Tarreau <w@....eu>,
        Wei Wang <weiwan@...gle.com>, Martin KaFai Lau <kafai@...com>,
        Eric Dumazet <edumazet@...gle.com>,
        "David S. Miller" <davem@...emloft.net>,
        Chris Rankin <rankincj@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: BUG warnings in 4.14.9

On Wed, Dec 27, 2017 at 04:25:00AM +0000, alexander.levin@...izon.com wrote:
> On Tue, Dec 26, 2017 at 10:54:37PM +0200, Ido Schimmel wrote:
> >On Tue, Dec 26, 2017 at 07:59:55PM +0100, Willy Tarreau wrote:
> >> Guys,
> >>
> >> Chris reported the bug below and confirmed that reverting commit
> >> 9704f81 (ipv6: grab rt->rt6i_ref before allocating pcpu rt) seems to
> >> have fixed the issue for him. This patch is a94b9367 in mainline.
> >>
> >> I personally have no opinion on the patch, just found it because it
> >> was the only one touching this area between 4.14.8 and 4.14.9 :-)
> >>
> >> Should this be reverted or maybe fixed differently ?
> >
> >Maybe I'm missing something, but how come this patch even made its way
> >into 4.14.y? It's part of a series to RCU-ify IPv6 FIB lookup that went
> >into 4.15.
> >
> >Anyway, the mentioned bug was already fixed by commit 951f788a80ff
> >("ipv6: fix a BUG in rt6_get_pcpu_route()") when the code was still in
> >net-next.
> 
> Uh, you're right. Greg, please just revert 9704f81. Thanks!

Now reverted, sorry about this.

greg k-h