[PATCH] net: netlink: fix error return code of netlink_proto_init()

[Jia-Ju Bai]

When kcalloc() returns NULL to nl_table, no error return code of
netlink_proto_init() is assigned.
To fix this bug, err is assigned with -ENOMEM in this case.

Fixes: fab2caf62ed0 ("[NETLINK]: Call panic if nl_table allocation fails")
Reported-by: TOTE Robot <os...@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1...@gmail.com>
---
 net/netlink/af_netlink.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index dd488938447f..9ab66cfb1037 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -2880,8 +2880,10 @@ static int __init netlink_proto_init(void)
        BUILD_BUG_ON(sizeof(struct netlink_skb_parms) > sizeof_field(struct 
sk_buff, cb));
 
        nl_table = kcalloc(MAX_LINKS, sizeof(*nl_table), GFP_KERNEL);
-       if (!nl_table)
+       if (!nl_table) {
+               err = -ENOMEM;
                goto panic;
+       }
 
        for (i = 0; i < MAX_LINKS; i++) {
                if (rhashtable_init(&nl_table[i].hash,
-- 
2.17.1