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@etsukata.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/ipv6/sysctl_net_ipv6.c b/net/ipv6/sysctl_net_ipv6.c
index 8b3fe81783ed945e2f9172fd9008f48fed474475..dc4c91e0bfb8efcc9599b7505f526d443527e62d 100644 (file)
--- 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         = &flowlabel_reflect_max,
        },