Patch "scsi: qla2xxx: Fix NULL pointer access due to redundant fc_host_port_name call" has been added to the 4.11-stable tree

Patch "scsi: qla2xxx: Fix NULL pointer access due to redundant fc_host_port_name call" has been added to the 4.11-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    scsi: qla2xxx: Fix NULL pointer access due to redundant fc_host_port_name call

to the 4.11-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     scsi-qla2xxx-fix-null-pointer-access-due-to-redundant-fc_host_port_name-call.patch
and it can be found in the queue-4.11 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 0ea88662b5c6404a8f7af6b040b3cf1f0e8c3a66 Mon Sep 17 00:00:00 2001
From: Quinn Tran <quinn.tran@cavium.com>
Date: Wed, 24 May 2017 18:06:19 -0700
Subject: scsi: qla2xxx: Fix NULL pointer access due to redundant fc_host_port_name call

From: Quinn Tran <quinn.tran@cavium.com>

commit 0ea88662b5c6404a8f7af6b040b3cf1f0e8c3a66 upstream.

Remove redundant fc_host_port_name calls to prevent early access of
scsi_host->shost_data buffer. This prevent null pointer access.

Following stack trace is seen:

BUG: unable to handle kernel NULL pointer dereference at 00000000000008
IP: qla24xx_report_id_acquisition+0x22d/0x3a0 [qla2xxx]

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/scsi/qla2xxx/qla_mbx.c |    9 ---------
 1 file changed, 9 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -3676,15 +3676,6 @@ qla24xx_report_id_acquisition(scsi_qla_h
 				qlt_update_host_map(vha, id);
 			}
 
-			fc_host_port_name(vha->host) =
-			    wwn_to_u64(vha->port_name);
-
-			if (qla_ini_mode_enabled(vha))
-				ql_dbg(ql_dbg_mbx, vha, 0x1018,
-				    "FA-WWN portname %016llx (%x)\n",
-				    fc_host_port_name(vha->host),
-				    rptid_entry->vp_status);
-
 			set_bit(REGISTER_FC4_NEEDED, &vha->dpc_flags);
 			set_bit(REGISTER_FDMI_NEEDED, &vha->dpc_flags);
 		} else {


Patches currently in stable-queue which might be from quinn.tran@cavium.com are

queue-4.11/scsi-qla2xxx-fix-null-pointer-access-due-to-redundant-fc_host_port_name-call.patch