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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 v2 1/2] ipv6: mcast: annotate data-races around mca_flags
Date: Thu, 11 Jun 2026 09:31:51 +0300	[thread overview]
Message-ID: <20260611063151.GA848847@shredder> (raw)
In-Reply-To: <20260609081113.7613-2-sigefriedhyy@gmail.com>

On Tue, Jun 09, 2026 at 05:11:12PM +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>

  parent reply	other threads:[~2026-06-11  6:32 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-06-09  8:11 [PATCH net-next v2 0/2] ipv6: mcast: annotate data races in /proc/net/igmp6 Yuyang Huang
2026-06-09  8:11 ` [PATCH net-next v2 1/2] ipv6: mcast: annotate data-races around mca_flags Yuyang Huang
2026-06-09  9:36   ` Eric Dumazet
2026-06-09 10:39     ` Yuyang Huang
2026-06-11  6:31   ` Ido Schimmel [this message]
2026-06-09  8:11 ` [PATCH net-next v2 2/2] ipv6: mcast: annotate igmp6 timer expiry race Yuyang Huang
2026-06-11  6:32   ` Ido Schimmel

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