linux-kernel - [PATCH 4.4 080/101] target/iscsi: Fix double free in lio_target_tiqn

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Message-Id: <20170110131525.880037210@linuxfoundation.org>
Date:   Tue, 10 Jan 2017 14:37:33 +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, Dan Carpenter <dan.carpenter@...cle.com>,
        David Disseldorp <ddiss@...e.de>,
        Bart Van Assche <bart.vanassche@...disk.com>
Subject: [PATCH 4.4 080/101] target/iscsi: Fix double free in lio_target_tiqn_addtpg()

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

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

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

commit a91918cd3ea11f91c68e08e1e8ce1b560447a80e upstream.

This iscsit_tpg_add_portal_group() function is only called from
lio_target_tiqn_addtpg().  Both functions free the "tpg" pointer on
error so it's a double free bug.  The memory is allocated in the caller
so it should be freed in the caller and not here.

Fixes: e48354ce078c ("iscsi-target: Add iSCSI fabric support for target v4.1")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Reviewed-by: David Disseldorp <ddiss@...e.de>
[ bvanassche: Added "Fix" at start of patch title ]
Signed-off-by: Bart Van Assche <bart.vanassche@...disk.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/target/iscsi/iscsi_target_tpg.c |    1 -
 1 file changed, 1 deletion(-)

--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -260,7 +260,6 @@ err_out:
 		iscsi_release_param_list(tpg->param_list);
 		tpg->param_list = NULL;
 	}
-	kfree(tpg);
 	return -ENOMEM;
 }