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[PATCH] scsi: qla4xxx: check for null return from iscsi_lookup_endpoint

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  [PATCH] scsi: qla4xxx: check for null return from iscsi_lookup_endpoint Colin King <colin.king@canonical.com> - 2017-05-08 02:10 +0200
    Re: [PATCH] scsi: qla4xxx: check for null return from  iscsi_lookup_endpoint Dan Carpenter <dan.carpenter@oracle.com> - 2017-05-08 14:20 +0200

#1637174 — [PATCH] scsi: qla4xxx: check for null return from iscsi_lookup_endpoint

From: Colin Ian King <colin.king@canonical.com>

iscsi_lookup_endpoint can potentially return null and in 9 out of
the 10 calls to this function a null return is checked, so I think
it is pertinent to perform a null check here too and return -EINVAL
as in the other null cases.

Detected by CoverityScan, CID#147282 ("Dereference null return value")

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/scsi/qla4xxx/ql4_os.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
index 64c6fa563fdb..803e342e1093 100644
--- a/drivers/scsi/qla4xxx/ql4_os.c
+++ b/drivers/scsi/qla4xxx/ql4_os.c
@@ -3189,6 +3189,8 @@ static int qla4xxx_conn_bind(struct iscsi_cls_session *cls_session,
 	if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
 		return -EINVAL;
 	ep = iscsi_lookup_endpoint(transport_fd);
+	if (!ep)
+		return -EINVAL;
 	conn = cls_conn->dd_data;
 	qla_conn = conn->dd_data;
 	qla_conn->qla_ep = ep->dd_data;
-- 
2.11.0

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#1637416 — Re: [PATCH] scsi: qla4xxx: check for null return from iscsi_lookup_endpoint

This should be CC'd to QLogic-Storage-Upstream@qlogic.com as well.

regards,
dan carpenter

On Sun, May 07, 2017 at 10:30:20PM +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> iscsi_lookup_endpoint can potentially return null and in 9 out of
> the 10 calls to this function a null return is checked, so I think
> it is pertinent to perform a null check here too and return -EINVAL
> as in the other null cases.
> 
> Detected by CoverityScan, CID#147282 ("Dereference null return value")
> 
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
>  drivers/scsi/qla4xxx/ql4_os.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c
> index 64c6fa563fdb..803e342e1093 100644
> --- a/drivers/scsi/qla4xxx/ql4_os.c
> +++ b/drivers/scsi/qla4xxx/ql4_os.c
> @@ -3189,6 +3189,8 @@ static int qla4xxx_conn_bind(struct iscsi_cls_session *cls_session,
>  	if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
>  		return -EINVAL;
>  	ep = iscsi_lookup_endpoint(transport_fd);
> +	if (!ep)
> +		return -EINVAL;
>  	conn = cls_conn->dd_data;
>  	qla_conn = conn->dd_data;
>  	qla_conn->qla_ep = ep->dd_data;
> -- 
> 2.11.0
> 
> --
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