linux-kernel - [PATCH 4.18 088/135] scsi: qla2xxx: Fix an endian bug in fcpcmd_is

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Date:   Tue, 16 Oct 2018 19:05:18 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Quinn Tran <Quinn.Tran@...ium.com>,
        Himanshu Madhani <himanshu.madhani@...ium.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.18 088/135] scsi: qla2xxx: Fix an endian bug in fcpcmd_is_corrupted()

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit cbe3fd39d223f14b1c60c80fe9347a3dd08c2edb ]

We should first do the le16_to_cpu endian conversion and then apply the
FCP_CMD_LENGTH_MASK mask.

Fixes: 5f35509db179 ("qla2xxx: Terminate exchange if corrupted")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Quinn Tran <Quinn.Tran@...ium.com>
Acked-by: Himanshu Madhani <himanshu.madhani@...ium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/scsi/qla2xxx/qla_target.h |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_target.h
+++ b/drivers/scsi/qla2xxx/qla_target.h
@@ -374,8 +374,8 @@ struct atio_from_isp {
 static inline int fcpcmd_is_corrupted(struct atio *atio)
 {
 	if (atio->entry_type == ATIO_TYPE7 &&
-	    (le16_to_cpu(atio->attr_n_length & FCP_CMD_LENGTH_MASK) <
-	    FCP_CMD_LENGTH_MIN))
+	    ((le16_to_cpu(atio->attr_n_length) & FCP_CMD_LENGTH_MASK) <
+	     FCP_CMD_LENGTH_MIN))
 		return 1;
 	else
 		return 0;