linux-kernel - [PATCH 4.9 010/175] scsi: be2iscsi: Revert "Fix a theoretical leak in beiscsi_create

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Message-Id: <20201228124853.751432261@linuxfoundation.org>
Date:   Mon, 28 Dec 2020 13:47:43 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Thomas Lamprecht <t.lamprecht@...xmox.com>,
        Dan Carpenter <dan.carpenter@...cle.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.9 010/175] scsi: be2iscsi: Revert "Fix a theoretical leak in beiscsi_create_eqs()"

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

commit eeaf06af6f87e1dba371fbe42674e6f963220b9c upstream.

My patch caused kernel Oopses and delays in boot.  Revert it.

The problem was that I moved the "mem->dma = paddr;" before the call to
be_fill_queue().  But the first thing that the be_fill_queue() function
does is memset the whole struct to zero which overwrites the assignment.

Link: https://lore.kernel.org/r/X8jXkt6eThjyVP1v@mwanda
Fixes: 38b2db564d9a ("scsi: be2iscsi: Fix a theoretical leak in beiscsi_create_eqs()")
Cc: stable <stable@...r.kernel.org>
Reported-by: Thomas Lamprecht <t.lamprecht@...xmox.com>
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/be2iscsi/be_main.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/scsi/be2iscsi/be_main.c
+++ b/drivers/scsi/be2iscsi/be_main.c
@@ -3052,7 +3052,6 @@ static int beiscsi_create_eqs(struct bei
 		if (!eq_vaddress)
 			goto create_eq_error;
 
-		mem->dma = paddr;
 		mem->va = eq_vaddress;
 		ret = be_fill_queue(eq, phba->params.num_eq_entries,
 				    sizeof(struct be_eq_entry), eq_vaddress);
@@ -3062,6 +3061,7 @@ static int beiscsi_create_eqs(struct bei
 			goto create_eq_error;
 		}
 
+		mem->dma = paddr;
 		ret = beiscsi_cmd_eq_create(&phba->ctrl, eq,
 					    phwi_context->cur_eqd);
 		if (ret) {
@@ -3116,7 +3116,6 @@ static int beiscsi_create_cqs(struct bei
 		if (!cq_vaddress)
 			goto create_cq_error;
 
-		mem->dma = paddr;
 		ret = be_fill_queue(cq, phba->params.num_cq_entries,
 				    sizeof(struct sol_cqe), cq_vaddress);
 		if (ret) {
@@ -3126,6 +3125,7 @@ static int beiscsi_create_cqs(struct bei
 			goto create_cq_error;
 		}
 
+		mem->dma = paddr;
 		ret = beiscsi_cmd_cq_create(&phba->ctrl, cq, eq, false,
 					    false, 0);
 		if (ret) {