[PATCH] scsi: lpfc: prevent potential null pointer dereference

From	"Gustavo A. R. Silva" <garsilva@embeddedor.com>
Newsgroups	linux.kernel
Subject	[PATCH] scsi: lpfc: prevent potential null pointer dereference
Date	2017-05-23 17:10 +0200
Message-ID	<tKjBE-4S4-21@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Null check at line 966: if (ndlp) {,  implies that ndlp might be NULL.
Functions lpfc_nlp_set_state() and lpfc_issue_els_prli() dereference
pointer ndlp. Include these function calls inside the IF block that
tests pointer ndlp.

Addresses-Coverity-ID: 1401856
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
---
 drivers/scsi/lpfc/lpfc_ct.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_ct.c b/drivers/scsi/lpfc/lpfc_ct.c
index c7962da..ecb174b 100644
--- a/drivers/scsi/lpfc/lpfc_ct.c
+++ b/drivers/scsi/lpfc/lpfc_ct.c
@@ -978,9 +978,10 @@ lpfc_cmpl_ct_cmd_gft_id(struct lpfc_hba *phba, struct lpfc_iocbq *cmdiocb,
 					 ndlp, did, ndlp->nlp_fc4_type,
 					 FC_TYPE_FCP, FC_TYPE_NVME);
 			ndlp->nlp_prev_state = NLP_STE_REG_LOGIN_ISSUE;
+
+			lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
+			lpfc_issue_els_prli(vport, ndlp, 0);
 		}
-		lpfc_nlp_set_state(vport, ndlp, NLP_STE_PRLI_ISSUE);
-		lpfc_issue_els_prli(vport, ndlp, 0);
 	} else
 		lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
 				 "3065 GFT_ID failed x%08x\n", irsp->ulpStatus);
-- 
2.5.0

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[PATCH] scsi: lpfc: prevent potential null pointer dereference "Gustavo A. R. Silva" <garsilva@embeddedor.com> - 2017-05-23 17:10 +0200

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