linux-kernel - [PATCH 3.10 069/250] target/iscsi: Fix double free in lio_target_tiqn

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Date:   Thu,  8 Jun 2017 00:57:35 +0200
From:   Willy Tarreau <w@....eu>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        linux@...ck-us.net
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Bart Van Assche <bart.vanassche@...disk.com>,
        Willy Tarreau <w@....eu>
Subject: [PATCH 3.10 069/250] target/iscsi: Fix double free in lio_target_tiqn_addtpg()

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: Willy Tarreau <w@....eu>
---
 drivers/target/iscsi/iscsi_target_tpg.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index 75a4e83..a6801e8 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -256,7 +256,6 @@ err_out:
 		iscsi_release_param_list(tpg->param_list);
 		tpg->param_list = NULL;
 	}
-	kfree(tpg);
 	return -ENOMEM;
 }
 
-- 
2.8.0.rc2.1.gbe9624a