tipc: set sysctl_tipc_rmem and named_timeout right range

[ Upstream commit 4bcd4ec1017205644a2697bccbc3b5143f522f5f ]

We find that sysctl_tipc_rmem and named_timeout do not have the right minimum
setting. sysctl_tipc_rmem should be larger than zero, like sysctl_tcp_rmem.
And named_timeout as a timeout setting should be not less than zero.

Fixes: cc79dd1ba9c10 ("tipc: change socket buffer overflow control to respect sk_rcvbuf")
Fixes: a5325ae5b8bff ("tipc: add name distributor resiliency queue")
Signed-off-by: Jie Liu <liujie165@huawei.com>
Reported-by: Qiang Ning <ningqiang1@huawei.com>
Reviewed-by: Zhiqiang Liu <liuzhiqiang26@huawei.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/net/tipc/sysctl.c b/net/tipc/sysctl.c
index 1a779b1..40f6d82 100644 (file)
--- a/net/tipc/sysctl.c
+++ b/net/tipc/sysctl.c
@@ -37,6 +37,8 @@
 
 #include <linux/sysctl.h>
 
+static int zero;
+static int one = 1;
 static struct ctl_table_header *tipc_ctl_hdr;
 
 static struct ctl_table tipc_table[] = {
@@ -45,14 +47,16 @@ static struct ctl_table tipc_table[] = {
                .data           = &sysctl_tipc_rmem,
                .maxlen         = sizeof(sysctl_tipc_rmem),
                .mode           = 0644,
-               .proc_handler   = proc_dointvec,
+               .proc_handler   = proc_dointvec_minmax,
+               .extra1         = &one,
        },
        {
                .procname       = "named_timeout",
                .data           = &sysctl_tipc_named_timeout,
                .maxlen         = sizeof(sysctl_tipc_named_timeout),
                .mode           = 0644,
-               .proc_handler   = proc_dointvec,
+               .proc_handler   = proc_dointvec_minmax,
+               .extra1         = &zero,
        },
        {}
 };