Commit 3a5f5550 authored Sep 01, 2025 by Yue Haibing Committed by Jakub Kicinski Sep 02, 2025

ipv6: annotate data-races around devconf->rpl_seg_enabled



devconf->rpl_seg_enabled can be changed concurrently from
/proc/sys/net/ipv6/conf, annotate lockless reads on it.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
Link: https://patch.msgid.link/20250901123726.1972881-2-yuehaibing@huawei.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

parent 41ec374b

net/ipv6/exthdrs.c

+2 −4

Original line number	Diff line number	Diff line
		@@ -494,10 +494,8 @@ static int ipv6_rpl_srh_rcv(struct sk_buff *skb)

		idev = __in6_dev_get(skb->dev);

		accept_rpl_seg = net->ipv6.devconf_all->rpl_seg_enabled;
		if (accept_rpl_seg > idev->cnf.rpl_seg_enabled)
		accept_rpl_seg = idev->cnf.rpl_seg_enabled;

		accept_rpl_seg = min(READ_ONCE(net->ipv6.devconf_all->rpl_seg_enabled),
		READ_ONCE(idev->cnf.rpl_seg_enabled));
		if (!accept_rpl_seg) {
		kfree_skb(skb);
		return -1;