linux-kernel - [PATCH] scsi: bnx2i: bnx2i_iscsi.c: Fix for possible null pointer dereference

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Date:	Sun, 18 May 2014 18:07:35 +0200
From:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
To:	Eddie Wai <eddie.wai@...adcom.com>,
	"James E.J. Bottomley" <JBottomley@...allels.com>
Cc:	Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] scsi: bnx2i: bnx2i_iscsi.c:  Fix for possible null pointer dereference

There is otherwise a risk of a possible null pointer dereference.

Was largely found by using a static code analysis program called cppcheck.

Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
---
 drivers/scsi/bnx2i/bnx2i_iscsi.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/scsi/bnx2i/bnx2i_iscsi.c b/drivers/scsi/bnx2i/bnx2i_iscsi.c
index 166543f..3df26ac 100644
--- a/drivers/scsi/bnx2i/bnx2i_iscsi.c
+++ b/drivers/scsi/bnx2i/bnx2i_iscsi.c
@@ -237,7 +237,10 @@ static int bnx2i_bind_conn_to_iscsi_cid(struct bnx2i_hba *hba,
 					struct bnx2i_conn *bnx2i_conn,
 					u32 iscsi_cid)
 {
-	if (hba && hba->cid_que.conn_cid_tbl[iscsi_cid]) {
+	if(!hba)
+		return -EFAULT;
+
+	if (hba->cid_que.conn_cid_tbl[iscsi_cid]) {
 		iscsi_conn_printk(KERN_ALERT, bnx2i_conn->cls_conn->dd_data,
 				 "conn bind - entry #%d not free\n", iscsi_cid);
 		return -EBUSY;
-- 
1.7.10.4

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