net/smc: fix illegal rmb_desc access in SMC-D connection dump

[platform/kernel/linux-starfive.git] / net / smc / smc_diag.c

diff --git a/net/smc/smc_diag.c b/net/smc/smc_diag.c
index 2c464d7..37833b9 100644 (file)
--- a/net/smc/smc_diag.c
+++ b/net/smc/smc_diag.c
@@ -163,7 +163,7 @@ static int __smc_diag_dump(struct sock *sk, struct sk_buff *skb,
        }
        if (smc_conn_lgr_valid(&smc->conn) && smc->conn.lgr->is_smcd &&
            (req->diag_ext & (1 << (SMC_DIAG_DMBINFO - 1))) &&
-           !list_empty(&smc->conn.lgr->list)) {
+           !list_empty(&smc->conn.lgr->list) && smc->conn.rmb_desc) {
                struct smc_connection *conn = &smc->conn;
                struct smcd_diag_dmbinfo dinfo;
                struct smcd_dev *smcd = conn->lgr->smcd;