Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Yue Haibing <yuehaibing@huawei.com>
To:     <davem@davemloft.net>, <gerrit@erg.abdn.ac.uk>
CC:     <linux-kernel@vger.kernel.org>, <netdev@vger.kernel.org>,
        <dccp@vger.kernel.org>, YueHaibing <yuehaibing@huawei.com>
Subject: [PATCH] dccp: Fix memleak in __feat_register_sp
Date:   Thu, 21 Mar 2019 22:10:58 +0800
Message-ID: <20190321141058.14580-1-yuehaibing@huawei.com>
MIME-Version: 1.0
Content-Type: text/plain
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: YueHaibing <yuehaibing@huawei.com>

If dccp_feat_push_change fails, we forget free the mem
which is alloced by kmemdup in dccp_feat_clone_sp_val.

Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: e8ef967a54f4 ("dccp: Registration routines for changing feature values")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 net/dccp/feat.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/net/dccp/feat.c b/net/dccp/feat.c
index f227f00..083e012 100644
--- a/net/dccp/feat.c
+++ b/net/dccp/feat.c
@@ -738,7 +738,12 @@ static int __feat_register_sp(struct list_head *fn, u8 feat, u8 is_local,
 	if (dccp_feat_clone_sp_val(&fval, sp_val, sp_len))
 		return -ENOMEM;
 
-	return dccp_feat_push_change(fn, feat, is_local, mandatory, &fval);
+	if (dccp_feat_push_change(fn, feat, is_local, mandatory, &fval)) {
+		kfree(val->sp.vec);
+		return -ENOMEM;
+	}
+
+	return 0;
 }
 
 /**
-- 
2.7.0