netdev - Re: [PATCH] ipv4: fix a race in ip4_datagram_release

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Date:	Tue, 08 Jul 2014 08:47:44 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	dormando <dormando@...ia.net>
Cc:	Alexey Preobrazhensky <preobr@...gle.com>,
	Steffen Klassert <steffen.klassert@...unet.com>,
	David Miller <davem@...emloft.net>, paulmck@...ux.vnet.ibm.com,
	netdev@...r.kernel.org, Kostya Serebryany <kcc@...gle.com>,
	Dmitry Vyukov <dvyukov@...gle.com>,
	Lars Bull <larsbull@...gle.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Bruce Curtis <brutus@...gle.com>,
	Maciej Żenczykowski <maze@...gle.com>,
	Alexei Starovoitov <alexei.starovoitov@...il.com>
Subject: Re: [PATCH] ipv4: fix a race in ip4_datagram_release_cb()

On Mon, 2014-07-07 at 18:41 -0700, dormando wrote:

> Mostly there, but I think we hit what might be a new bug.. The machines
> which crashed every few days previously have been stable for weeks.
> 
> however I had one machine running the new kernel in a larger cluster
> elsewhere; we had a network event and the one machine on the new kernel
> panic'ed in ipv4_dst_destroy, but what looks like a new path. Sadly I've
> had to halt the rollout :( All of the older unfixed kernels survived this
> particular network event.
> 
> Unfortunately this is still on 3.10, due to a bad softirq regression in
> 3.14 I've not had time to track down. I applied all of your patches for
> what wasn't already in 3.10. The only other change I made was to un-revert
> 62713c4b6bc10c2d082ee1540e11b01a2b2162ab - which I'd been keeping reverted
> as it was making crashes much more frequent.

Hmm, always give patch title or a valid sha1 commit, this one is not in
David trees, so its hard to tell.


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