From: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Date: Sun, 2 Dec 2012 13:33:24 +0000 (-0500)
Subject: [SCSI] lpfc: fix potential NULL pointer dereference in lpfc_sli4_rq_put()
X-Git-Tag: v3.9-rc7~14^2
X-Git-Url: https://git.kernelconcepts.de/?a=commitdiff_plain;h=5a25bf36b7394f11f2ff90c9e203639cd3dc041a;p=karo-tx-linux.git

[SCSI] lpfc: fix potential NULL pointer dereference in lpfc_sli4_rq_put()

The dereference to 'put_index' should be moved below the NULL test.

Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
---

diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 74b67d98e952..d43faf34c1e2 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -438,11 +438,12 @@ lpfc_sli4_rq_put(struct lpfc_queue *hq, struct lpfc_queue *dq,
 	struct lpfc_rqe *temp_hrqe;
 	struct lpfc_rqe *temp_drqe;
 	struct lpfc_register doorbell;
-	int put_index = hq->host_index;
+	int put_index;
 
 	/* sanity check on queue memory */
 	if (unlikely(!hq) || unlikely(!dq))
 		return -ENOMEM;
+	put_index = hq->host_index;
 	temp_hrqe = hq->qe[hq->host_index].rqe;
 	temp_drqe = dq->qe[dq->host_index].rqe;