[PATCH net-next] devlink: Add missing check of nlmsg_put

[YueHaibing]

nlmsg_put may fail, this fix add a check of its return value.

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 net/core/devlink.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/net/core/devlink.c b/net/core/devlink.c
index 60248a5..059575c 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -4086,6 +4086,9 @@ void devlink_health_buffer_nest_cancel(struct 
devlink_health_buffer *buffer)
                return -ENOMEM;
        nlh = nlmsg_put(skb, info->snd_portid, info->snd_seq,
                        NLMSG_DONE, 0, flags | NLM_F_MULTI);
+       if (!nlh)
+               goto nla_put_failure;
+
        err = genlmsg_reply(skb, info);
        if (err)
                return err;