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Message-ID: <20171226205436.GA32546@splinter> Date: Tue, 26 Dec 2017 22:54:37 +0200 From: Ido Schimmel <idosch@...sch.org> To: Willy Tarreau <w@....eu> Cc: Wei Wang <weiwan@...gle.com>, Martin KaFai Lau <kafai@...com>, Eric Dumazet <edumazet@...gle.com>, "David S. Miller" <davem@...emloft.net>, Sasha Levin <alexander.levin@...izon.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Chris Rankin <rankincj@...il.com>, linux-kernel@...r.kernel.org, stable@...r.kernel.org, netdev@...r.kernel.org Subject: Re: BUG warnings in 4.14.9 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.
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