From: Ido Schimmel <idosch@nvidia.com>
To: Yuyang Huang <sigefriedhyy@gmail.com>
Cc: Jiayuan Chen <jiayuan.chen@linux.dev>,
"David S. Miller" <davem@davemloft.net>,
David Ahern <dsahern@kernel.org>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Simon Horman <horms@kernel.org>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH net-next] ipv6: mcast: annotate data-races around mca_users
Date: Wed, 27 May 2026 10:15:59 +0300 [thread overview]
Message-ID: <20260527071559.GA432853@shredder> (raw)
In-Reply-To: <20260524022456.20689-1-sigefriedhyy@gmail.com>
On Sun, May 24, 2026 at 11:24:56AM +0900, Yuyang Huang wrote:
> /proc/net/igmp6 walks IPv6 multicast memberships under RCU and prints
> mca_users without holding idev->mc_lock, while multicast join and leave
> paths update the field while holding idev->mc_lock. Annotate this
> intentional lockless snapshot with READ_ONCE() and the matching writers
> with WRITE_ONCE().
>
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Yuyang Huang <sigefriedhyy@gmail.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
prev parent reply other threads:[~2026-05-27 7:16 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-24 2:24 [PATCH net-next] ipv6: mcast: annotate data-races around mca_users Yuyang Huang
2026-05-27 7:15 ` Ido Schimmel [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20260527071559.GA432853@shredder \
--to=idosch@nvidia.com \
--cc=davem@davemloft.net \
--cc=dsahern@kernel.org \
--cc=edumazet@google.com \
--cc=horms@kernel.org \
--cc=jiayuan.chen@linux.dev \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
--cc=sigefriedhyy@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox