netdev - Re: [PATCH net 0/4] ipv6: f6i->fib6_siblings and rt->fib6

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Message-ID: <20250726113417.1371e296@kernel.org>
Date: Sat, 26 Jul 2025 11:34:17 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Eric Dumazet <edumazet@...gle.com>, Kuniyuki Iwashima
 <kuniyu@...gle.com>
Cc: "David S . Miller" <davem@...emloft.net>, Paolo Abeni
 <pabeni@...hat.com>, Simon Horman <horms@...nel.org>, David Ahern
 <dsahern@...nel.org>, netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH net 0/4] ipv6: f6i->fib6_siblings and rt->fib6_nsiblings
 fixes

On Fri, 25 Jul 2025 14:07:21 +0000 Eric Dumazet wrote:
> Series based on an internal syzbot report with a repro.
> 
> After fixing (in the first patch) the original minor issue,
> I found that syzbot repro was able to trigger a second
> more serious bug in rt6_nlmsg_size().
> 
> Code review then led to the two final patches.
> 
> I have not released the syzbot bug, because other issues
> still need investigations.

We should probably spend more time on tests that modify things
concurrently for the RCU conversions :$