In ipv6_srh_rcv() we use min(net->ipv6.devconf_all->seg6_enabled,
idev->cnf.seg6_enabled) is intended to return 0 when either value is zero,
but if one of the values is negative it will in fact return non-zero.

Signed-off-by: Yue Haibing <yuehaibing@huawei.com>
---
 net/ipv6/addrconf.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/net/ipv6/addrconf.c b/net/ipv6/addrconf.c
index 40e9c336f6c5..87f14532cb7e 100644
--- a/net/ipv6/addrconf.c
+++ b/net/ipv6/addrconf.c
@@ -7193,6 +7193,8 @@ static const struct ctl_table addrconf_sysctl[] = {
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
 		.proc_handler	= proc_dointvec,
+		.extra1		= SYSCTL_ZERO,
+		.extra2		= SYSCTL_ONE,
 	},
 #ifdef CONFIG_IPV6_SEG6_HMAC
 	{
-- 
2.34.1