linux-kernel - [PATCH 3.15 03/66] iscsi-target: Explicily clear login response PDU in exception path

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Message-Id: <20140704221422.977770506@linuxfoundation.org>
Date:	Fri,  4 Jul 2014 15:14:02 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Christophe Vu-Brugier <cvubrugier@...oo.fr>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH 3.15 03/66] iscsi-target: Explicily clear login response PDU in exception path

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

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

From: Nicholas Bellinger <nab@...ux-iscsi.org>

commit 683497566d48f86e04d026de1ee658dd74fc1077 upstream.

This patch adds a explicit memset to the login response PDU
exception path in iscsit_tx_login_rsp().

This addresses a regression bug introduced in commit baa4d64b
where the initiator would end up not receiving the login
response and associated status class + detail, before closing
the login connection.

Reported-by: Christophe Vu-Brugier <cvubrugier@...oo.fr>
Tested-by: Christophe Vu-Brugier <cvubrugier@...oo.fr>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/target/iscsi/iscsi_target_util.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/target/iscsi/iscsi_target_util.c
+++ b/drivers/target/iscsi/iscsi_target_util.c
@@ -1295,6 +1295,8 @@ int iscsit_tx_login_rsp(struct iscsi_con
 	login->login_failed = 1;
 	iscsit_collect_login_stats(conn, status_class, status_detail);
 
+	memset(&login->rsp[0], 0, ISCSI_HDR_LEN);
+
 	hdr	= (struct iscsi_login_rsp *)&login->rsp[0];
 	hdr->opcode		= ISCSI_OP_LOGIN_RSP;
 	hdr->status_class	= status_class;


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