From 78670e6935ffa62530b8a683f077f6fd80d0807c Mon Sep 17 00:00:00 2001 From: liuyacan Date: Thu, 4 Aug 2022 16:14:17 +0800 Subject: [PATCH] net/smc: sync err code when tcp connection was refused stable inclusion from stable-v5.10.114 commit 83d128daff2e7f92cde38ebf7b06f83f77d79ba0 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5IY1V Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=83d128daff2e7f92cde38ebf7b06f83f77d79ba0 -------------------------------- [ Upstream commit 4e2e65e2e56c6ceb4ea1719360080c0af083229e ] In the current implementation, when TCP initiates a connection to an unavailable [ip,port], ECONNREFUSED will be stored in the TCP socket, but SMC will not. However, some apps (like curl) use getsockopt(,,SO_ERROR,,) to get the error information, which makes them miss the error message and behave strangely. Fixes: 50717a37db03 ("net/smc: nonblocking connect rework") Signed-off-by: liuyacan Reviewed-by: Tony Lu Acked-by: Karsten Graul Signed-off-by: David S. Miller Signed-off-by: Sasha Levin Signed-off-by: Zheng Zengkai Acked-by: Xie XiuQi --- net/smc/af_smc.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index 1b98f3241150..35db3260e8d5 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -1057,6 +1057,8 @@ static void smc_connect_work(struct work_struct *work) smc->sk.sk_state = SMC_CLOSED; if (rc == -EPIPE || rc == -EAGAIN) smc->sk.sk_err = EPIPE; + else if (rc == -ECONNREFUSED) + smc->sk.sk_err = ECONNREFUSED; else if (signal_pending(current)) smc->sk.sk_err = -sock_intr_errno(timeo); sock_put(&smc->sk); /* passive closing */ -- GitLab