linux-kernel - [PATCH net-next] net/ipv6: Fix misuse of proc_dointvec "flowlabel

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Message-Id: <20190628023714.1923-1-devel@etsukata.com>
Date:   Fri, 28 Jun 2019 11:37:14 +0900
From:   Eiichi Tsukata <devel@...ukata.com>
To:     davem@...emloft.net, edumazet@...gle.com, kuznet@....inr.ac.ru,
        yoshfuji@...ux-ipv6.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     Eiichi Tsukata <devel@...ukata.com>
Subject: [PATCH net-next] net/ipv6: Fix misuse of proc_dointvec "flowlabel_reflect"

/proc/sys/net/ipv6/flowlabel_reflect assumes written value to be in the
range of 0 to 3. Use proc_dointvec_minmax instead of proc_dointvec.

Fixes: 323a53c41292 ("ipv6: tcp: enable flowlabel reflection in some RST packets")
Signed-off-by: Eiichi Tsukata <devel@...ukata.com>
---
 net/ipv6/sysctl_net_ipv6.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c
index 6d86fac472e7..831573461e19 100644
--- a/net/ipv6/sysctl_net_ipv6.c
+++ b/net/ipv6/sysctl_net_ipv6.c
@@ -114,7 +114,7 @@ static struct ctl_table ipv6_table_template[] = {
 		.data		= &init_net.ipv6.sysctl.flowlabel_reflect,
 		.maxlen		= sizeof(int),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec,
+		.proc_handler	= proc_dointvec_minmax,
 		.extra1		= &zero,
 		.extra2		= &three,
 	},
-- 
2.21.0