[PATCH net-next] net: sched: fix error return code in tcf_del_walker()

When nla_put_u32() fails, 'ret' could be 0, it should
return error code in tcf_del_walker().

Reported-by: Hulk Robot <redacted>
Signed-off-by: Yang Yingliang <redacted>
---
 net/sched/act_api.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index f6d5755d669e..d17a66aab8ee 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c

@@ -381,7 +381,8 @@ static int tcf_del_walker(struct tcf_idrinfo *idrinfo, struct sk_buff *skb,
 	}
 	mutex_unlock(&idrinfo->lock);
 
-	if (nla_put_u32(skb, TCA_FCNT, n_i))
+	ret = nla_put_u32(skb, TCA_FCNT, n_i);
+	if (ret)
 		goto nla_put_failure;
 	nla_nest_end(skb, nest);
 

-- 
2.25.1

Hello:

This patch was applied to netdev/net-next.git (refs/heads/master):

On Thu, 17 Jun 2021 16:02:07 +0800 you wrote:

When nla_put_u32() fails, 'ret' could be 0, it should
return error code in tcf_del_walker().

Reported-by: Hulk Robot <redacted>
Signed-off-by: Yang Yingliang <redacted>
---
 net/sched/act_api.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Here is the summary with links:
  - [net-next] net: sched: fix error return code in tcf_del_walker()
    https://git.kernel.org/netdev/net-next/c/55d96f72e8dd

You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html