From: 喵公子 <miaogongzi0227@gmail.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: stable@vger.kernel.org, regressions@lists.linux.dev,
edumazet@google.com, kuba@kernel.org, sashal@kernel.org,
yoshfuji@linux-ipv6.org, netdev@vger.kernel.org
Subject: Re: [REGRESSION] IPv6 RA default router advertisement fails after kernel 6.12.42 updates
Date: Mon, 18 Aug 2025 21:19:15 +0800 [thread overview]
Message-ID: <CACBcRwKcApHzYssnPj2YQht1yYicTALs03GYkyP88W-9Thmo3w@mail.gmail.com> (raw)
In-Reply-To: <2025081831-viewable-vanquish-e8bc@gregkh>
Hi Greg,
Thanks for the quick reply.
This regression has been reproduced on Linux 6.12.42 as shipped with
OpenWrt. Currently, OpenWrt only provides kernels from the 6.12.y
stable series, so I was only able to verify on 6.12.42.
I am looping in the networking/IPv6 maintainers so the right people
can take a look at this issue.
Best regards,
gongzi miao
Greg KH <gregkh@linuxfoundation.org> 于2025年8月18日周一 20:25写道：
>
> On Mon, Aug 18, 2025 at 08:03:00PM +0800, 喵公子 wrote:
> > Hi,
> >
> > While testing Linux kernel 6.12.42 on OpenWrt, we observed a
> > regression in IPv6 Router Advertisement (RA) handling for the default
> > router.
> >
> > Affected commits
> >
> > The following commits appear related and may have introduced the issue:
> >
> > ipv6: fix possible infinite loop in fib6_info_uses_dev()：
> > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.42&id=db65739d406c72776fbdbbc334be827ef05880d2
> >
> > ipv6: prevent infinite loop in rt6_nlmsg_size()：
> > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.42&id=cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38
> >
> > ipv6: annotate data-races around rt->fib6_nsiblings：
> > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.42&id=0c58f74f8aa991c2a63bb58ff743e1ff3d584b62
>
> Does this also happen on the latest kernel releases?
>
> Also, please always include the developers/maintainers/mailing list of
> the subsystem where you find an issue with. Otherwise you are not going
> to reach the developers who can help you out.
>
> thanks,
>
> greg k-h
next parent reply other threads:[~2025-08-18 13:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CACBcRw+Fu1B+fXEFvhfsZFtPqa5G=AYSW0K3L2RBWh8YfkgUhg@mail.gmail.com>
[not found] ` <2025081831-viewable-vanquish-e8bc@gregkh>
2025-08-18 13:19 ` 喵公子 [this message]
2025-08-20 23:14 [REGRESSION] IPv6 RA default router advertisement fails after kernel 6.12.42 updates 喵公子
2025-08-25 23:03 ` Jakub Kicinski
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