From: Ido Schimmel <idosch@nvidia.com>
To: Paolo Abeni <pabeni@redhat.com>
Cc: Yuyang Huang <yuyanghuang@google.com>,
"David S. Miller" <davem@davemloft.net>,
David Ahern <dsahern@kernel.org>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Simon Horman <horms@kernel.org>,
linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: [PATCH 1/2] ipv4: igmp: annotate data-races around in_dev->mc_count
Date: Thu, 4 Jun 2026 13:17:28 +0300 [thread overview]
Message-ID: <20260604101728.GA771160@shredder> (raw)
In-Reply-To: <bcffe05b-c10c-4a27-b260-e6ae872c795e@redhat.com>
On Thu, Jun 04, 2026 at 11:15:29AM +0200, Paolo Abeni wrote:
> On 6/4/26 11:11 AM, Paolo Abeni wrote:
> > On 5/31/26 5:07 AM, Yuyang Huang wrote:
> >> @@ -1922,7 +1923,7 @@ void ip_mc_destroy_dev(struct in_device *in_dev)
> >>
> >> while ((i = rtnl_dereference(in_dev->mc_list)) != NULL) {
> >> in_dev->mc_list = i->next_rcu;
> >> - in_dev->mc_count--;
> >> + WRITE_ONCE(in_dev->mc_count, in_dev->mc_count - 1);
> >> ip_mc_clear_src(i);
> >> ip_ma_put(i);
> >
> > The patch LGTM,
> But it does not apply cleanly to net. Please rebase and report, adding
> the target tree (`net`) and a revision number (`v2`) in the subj prefix.
Paolo, I think it's better to target such patches at net-next and
dropping the fixes tag.
See for example this recent patch that went into net-next:
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/net/ipv4/igmp.c?id=061c0aa740d5d3847cd600a74c66a165bee1fbe0
And this message from Linus:
https://lwn.net/Articles/1074171/
next prev parent reply other threads:[~2026-06-04 10:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-31 3:07 [PATCH net-next 0/2] ipv4: igmp: annotate diagnostic procfs data races Yuyang Huang
2026-05-31 3:07 ` [PATCH 1/2] ipv4: igmp: annotate data-races around in_dev->mc_count Yuyang Huang
2026-06-04 9:11 ` Paolo Abeni
2026-06-04 9:15 ` Paolo Abeni
2026-06-04 10:17 ` Ido Schimmel [this message]
2026-06-04 10:19 ` Ido Schimmel
2026-06-04 11:41 ` Yuyang Huang
2026-05-31 3:07 ` [PATCH 2/2] ipv4: igmp: annotate data-races around timer-related fields Yuyang Huang
2026-06-04 10:20 ` Ido Schimmel
2026-06-04 11:35 ` Yuyang Huang
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