From: Simon Horman <horms@kernel.org>
To: Jiayuan Chen <jiayuan.chen@linux.dev>
Cc: netdev@vger.kernel.org, David Ahern <dsahern@kernel.org>,
Ido Schimmel <idosch@nvidia.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@kernel.org>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Pablo Neira Ayuso <pablo@netfilter.org>,
Florian Westphal <fw@strlen.de>, Phil Sutter <phil@nwl.cc>,
Nikolay Aleksandrov <razor@blackwall.org>,
Paul Moore <paul@paul-moore.com>,
Matthieu Baerts <matttbe@kernel.org>,
Mat Martineau <martineau@kernel.org>,
Geliang Tang <geliang@kernel.org>, Julian Anastasov <ja@ssi.bg>,
Allison Henderson <achender@kernel.org>,
Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>,
Xin Long <lucien.xin@gmail.com>,
"D. Wythe" <alibuda@linux.alibaba.com>,
Dust Li <dust.li@linux.alibaba.com>,
Sidraya Jayagond <sidraya@linux.ibm.com>,
Mahanta Jambigi <mjambigi@linux.ibm.com>,
Tony Lu <tonylu@linux.alibaba.com>,
Wen Gu <guwen@linux.alibaba.com>,
linux-kernel@vger.kernel.org, netfilter-devel@vger.kernel.org,
coreteam@netfilter.org, bridge@lists.linux.dev,
linux-security-module@vger.kernel.org, mptcp@lists.linux.dev,
lvs-devel@vger.kernel.org, linux-rdma@vger.kernel.org,
rds-devel@oss.oracle.com, linux-sctp@vger.kernel.org,
linux-s390@vger.kernel.org
Subject: Re: [PATCH net-next 04/14] ipv6: annotate data-races around icmpv6 reply sysctls
Date: Fri, 13 Nov 2026 17:13:44 +0000 [thread overview]
Message-ID: <20261113171344.GO18859@horms.kernel.org> (raw)
In-Reply-To: <20261109025425.328445-5-jiayuan.chen@linux.dev>
On Mon, Nov 09, 2026 at 10:52:03AM +0800, Jiayuan Chen wrote:
> icmpv6_echo_ignore_all, icmpv6_echo_ignore_multicast,
> icmpv6_echo_ignore_anycast, anycast_src_echo_reply and fwmark_reflect are
> read without any lock while their sysctl handlers update them with
> WRITE_ONCE(). Add READ_ONCE() to the readers.
>
> KCSAN reports it when net.ipv6.icmp.echo_ignore_all is changed while
> ICMPv6 echo requests are received:
>
> BUG: KCSAN: data-race in icmpv6_rcv / proc_dou8vec_minmax
>
> write (marked) to 0xffffffff8ee2940d of 1 bytes by task 504 on cpu 0:
> proc_dou8vec_minmax+0x1ab/0x1f0
> proc_sys_call_handler+0x282/0x3a0
> proc_sys_write+0x13/0x20
> ...
>
> read to 0xffffffff8ee2940d of 1 bytes by interrupt on cpu 3:
> icmpv6_rcv+0x99d/0xd40
> ip6_protocol_deliver_rcu+0x787/0x9a0
> ip6_input_finish+0xb0/0x1b0
> ip6_input+0xa8/0x250
> ipv6_rcv+0x14b/0x1c0
> __netif_receive_skb_one_core+0x8f/0xe0
> ...
>
> value changed: 0x01 -> 0x00
>
> Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
Reviewed-by: Simon Horman <horms@kernel.org>
next prev parent reply other threads:[~2026-11-13 17:13 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-09 2:51 [PATCH net-next 00/14] net: annotate data-races around sysctl knobs Jiayuan Chen
2026-11-09 2:52 ` [PATCH net-next 01/14] ipv4: annotate data-races around ip_rt_* sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-10 5:53 ` netdev-bot+sashiko
2026-11-13 17:09 ` Simon Horman
2026-11-09 2:52 ` [PATCH net-next 02/14] inet: frags: annotate data-races around fqdir->timeout and fqdir->max_dist Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-13 17:10 ` Simon Horman
2026-11-09 2:52 ` [PATCH net-next 03/14] ipv6: annotate data-races around addrconf sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-13 17:13 ` Simon Horman
2026-11-09 2:52 ` [PATCH net-next 04/14] ipv6: annotate data-races around icmpv6 reply sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-13 17:13 ` Simon Horman [this message]
2026-11-09 2:52 ` [PATCH net-next 05/14] calipso: annotate data-races around cache sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-10 5:53 ` netdev-bot+sashiko
2026-11-13 17:14 ` Simon Horman
2026-11-09 2:52 ` [PATCH net-next 06/14] sctp: annotate data-races around sctp sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-10 5:53 ` netdev-bot+sashiko
2026-11-13 17:14 ` Simon Horman
2026-11-09 2:52 ` [PATCH net-next 07/14] mptcp: annotate data-races around pernet sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-10 11:28 ` Matthieu Baerts
2026-11-09 2:52 ` [PATCH net-next 08/14] rds: annotate data-races around core rds sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-13 17:15 ` Simon Horman
2026-11-09 2:52 ` [PATCH net-next 09/14] netfilter: conntrack: annotate data-races around conntrack sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-13 17:16 ` Simon Horman
2026-11-09 2:52 ` [PATCH net-next 10/14] netfilter: bridge: annotate data-races around br_netfilter and nf_log sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-10 5:53 ` netdev-bot+sashiko
2026-11-13 17:16 ` Simon Horman
2026-11-09 2:52 ` [PATCH net-next 11/14] ipvs: annotate data-races around lblc_expiration and lblcr_expiration Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-13 17:17 ` Simon Horman
2026-11-09 2:52 ` [PATCH net-next 12/14] net/smc: annotate data-races around smc sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-12 4:54 ` Dust Li
2026-11-09 2:52 ` [PATCH net-next 13/14] netfilter: conntrack: annotate data-races around timeout and tcp sysctls Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-13 17:19 ` Simon Horman
2026-11-09 2:52 ` [PATCH net-next 14/14] netfilter: cttimeout: annotate data-races around the default timeouts Jiayuan Chen
2026-11-10 3:01 ` sashiko-bot
2026-11-10 5:53 ` netdev-bot+sashiko
2026-11-13 17:20 ` Simon Horman
2026-11-09 3:11 ` [PATCH net-next 00/14] net: annotate data-races around sysctl knobs Jason Xing
2026-11-09 3:33 ` Jiayuan Chen
2026-11-09 6:52 ` Jason Xing
2026-11-09 4:59 ` MPTCP CI
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