linux-kernel - [PATCH] scsi: be2iscsi: Reset the address passed in beiscsi_iface_create

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Date:   Tue,  6 Apr 2021 19:24:45 -0500
From:   Aditya Pakki <pakki001@....edu>
To:     pakki001@....edu
Cc:     Subbu Seetharaman <subbu.seetharaman@...adcom.com>,
        Ketan Mukadam <ketan.mukadam@...adcom.com>,
        Jitendra Bhivare <jitendra.bhivare@...adcom.com>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] scsi: be2iscsi: Reset the address passed in beiscsi_iface_create_default

if_info is a local variable that is passed to beiscsi_if_get_info. In
case of failure, the variable is free'd but not reset to NULL. The patch
avoids security issue by passing NULL to if_info.

Signed-off-by: Aditya Pakki <pakki001@....edu>
---
 drivers/scsi/be2iscsi/be_iscsi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/be2iscsi/be_iscsi.c b/drivers/scsi/be2iscsi/be_iscsi.c
index a13c203ef7a9..1ff9d2a2a876 100644
--- a/drivers/scsi/be2iscsi/be_iscsi.c
+++ b/drivers/scsi/be2iscsi/be_iscsi.c
@@ -274,11 +274,13 @@ void beiscsi_iface_create_default(struct beiscsi_hba *phba)
 	if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V4, &if_info)) {
 		beiscsi_iface_create_ipv4(phba);
 		kfree(if_info);
+		if_info = NULL;
 	}
 
 	if (!beiscsi_if_get_info(phba, BEISCSI_IP_TYPE_V6, &if_info)) {
 		beiscsi_iface_create_ipv6(phba);
 		kfree(if_info);
+		if_info = NULL;
 	}
 }
 
-- 
2.25.1