From 0c9f1515aa80f12734123e5fcc50ffe525e1d533 Mon Sep 17 00:00:00 2001 From: Ursula Braun Date: Thu, 7 Dec 2017 13:38:45 +0100 Subject: [PATCH] smc: improve smc_clc_send_decline() error handling Let smc_clc_send_decline() return with an error, if the amount sent is smaller than the length of an smc decline message. Signed-off-by: Ursula Braun Signed-off-by: David S. Miller --- net/smc/af_smc.c | 9 +++------ net/smc/smc_clc.c | 2 +- 2 files changed, 4 insertions(+), 7 deletions(-) diff --git a/net/smc/af_smc.c b/net/smc/af_smc.c index 6451c5013e06..d3ae0d5b1677 100644 --- a/net/smc/af_smc.c +++ b/net/smc/af_smc.c @@ -520,7 +520,7 @@ static int smc_connect_rdma(struct smc_sock *smc) smc->use_fallback = true; if (reason_code && (reason_code != SMC_CLC_DECL_REPLY)) { rc = smc_clc_send_decline(smc, reason_code); - if (rc < sizeof(struct smc_clc_msg_decline)) + if (rc < 0) goto out_err; } goto out_connected; @@ -879,11 +879,9 @@ static void smc_listen_work(struct work_struct *work) } /* QP confirmation over RoCE fabric */ reason_code = smc_serv_conf_first_link(new_smc); - if (reason_code < 0) { + if (reason_code < 0) /* peer is not aware of a problem */ - rc = reason_code; goto out_err_unlock; - } if (reason_code > 0) goto decline_rdma_unlock; } @@ -916,8 +914,7 @@ static void smc_listen_work(struct work_struct *work) smc_conn_free(&new_smc->conn); new_smc->use_fallback = true; if (reason_code && (reason_code != SMC_CLC_DECL_REPLY)) { - rc = smc_clc_send_decline(new_smc, reason_code); - if (rc < sizeof(struct smc_clc_msg_decline)) + if (smc_clc_send_decline(new_smc, reason_code) < 0) goto out_err; } goto out_connected; diff --git a/net/smc/smc_clc.c b/net/smc/smc_clc.c index 1800e16b2a02..f5e17d29112b 100644 --- a/net/smc/smc_clc.c +++ b/net/smc/smc_clc.c @@ -133,7 +133,7 @@ int smc_clc_send_decline(struct smc_sock *smc, u32 peer_diag_info) smc->sk.sk_err = EPROTO; if (len < 0) smc->sk.sk_err = -len; - return len; + return sock_error(&smc->sk); } /* send CLC PROPOSAL message across internal TCP socket */ -- GitLab