netdev - Re: [PATCH ipsec 0/7] xfrm: policy: fix various bugs

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Message-ID: <20190110080929.GL3581@gauss3.secunet.de>
Date:   Thu, 10 Jan 2019 09:09:29 +0100
From:   Steffen Klassert <steffen.klassert@...unet.com>
To:     Florian Westphal <fw@...len.de>
CC:     <xiyou.wangcong@...il.com>, <netdev@...r.kernel.org>
Subject: Re: [PATCH ipsec 0/7] xfrm: policy: fix various bugs

On Fri, Jan 04, 2019 at 02:16:58PM +0100, Florian Westphal wrote:
> This series addresses various bugs, mostly fallout from the recent
> rcu tree work. One is a fix for an older bug coming from the initial
> rcu conversion.
> 
> There were several xfrm policy related syzbot bugs recently, but
> so far only one of them has a reproducer (addressed by patch #4).
> 
> As I provided ample rope for syzbot to hang itself with, there is
> some chance that this and the other fixes also resolve the KASAN
> and UAF syzbot xfrm reports reported in the last couple of days.
> 
> My plan is to wait until these patches are applied, and then tell syzbot
> for all the open reports that the last patch 'fixes this'.
> 
> AFAIU that will make syzbot report the problem again in case it can still
> trigger similar splats with these fixes in place.
> 
> Florian Westphal (7):
>       selftests: xfrm: add block rules with adjacent/overlapping subnets
>       xfrm: policy: use hlist rcu variants on inexact insert, part 2
>       xfrm: policy: increment xfrm_hash_generation on hash rebuild
>       xfrm: policy: delete inexact policies from inexact list on hash rebuild
>       xfrm: policy: fix reinsertion on node merge
>       selftests: xfrm: alter htresh to trigger move of policies to hash table
>       xfrm: policy: fix infinite loop when merging src-nodes

All applied, thanks a lot Florian!