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Message-ID: <20171227042459.cm7hgti47rkmwf3d@sasha-lappy> Date: Wed, 27 Dec 2017 04:25:00 +0000 From: alexander.levin@...izon.com To: Ido Schimmel <idosch@...sch.org> CC: 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>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, "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 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! -- Thanks, Sasha
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