From: Ido Schimmel <idosch@nvidia.com>
To: Yuyang Huang <sigefriedhyy@gmail.com>
Cc: "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 1/2] ipv6: mcast: annotate data-races around mca_flags
Date: Tue, 9 Jun 2026 10:45:03 +0300 [thread overview]
Message-ID: <20260609074503.GB663407@shredder> (raw)
In-Reply-To: <20260605145759.59639-2-sigefriedhyy@gmail.com>
On Fri, Jun 05, 2026 at 11:57:58PM +0900, Yuyang Huang wrote:
> /proc/net/igmp6 walks IPv6 multicast memberships under RCU and
> prints mca_flags without holding idev->mc_lock. The multicast paths
> update the field while holding idev->mc_lock.
>
> Annotate this intentional lockless snapshot with READ_ONCE() and the
> matching writers with WRITE_ONCE().
>
> Signed-off-by: Yuyang Huang <sigefriedhyy@gmail.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
next prev parent reply other threads:[~2026-06-09 7:45 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-05 14:57 [PATCH net-next 0/2] ipv6: mcast: annotate data races in /proc/net/igmp6 Yuyang Huang
2026-06-05 14:57 ` [PATCH net-next 1/2] ipv6: mcast: annotate data-races around mca_flags Yuyang Huang
2026-06-09 7:45 ` Ido Schimmel [this message]
2026-06-05 14:57 ` [PATCH net-next 2/2] ipv6: mcast: annotate igmp6 timer expiry race Yuyang Huang
2026-06-09 7:44 ` Ido Schimmel
2026-06-09 8:03 ` Yuyang Huang
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