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From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     YueHaibing <yuehaibing@huawei.com>, Hulk Robot <hulkci@huawei.com>,
        Mukesh Ojha <mojha@codeaurora.org>,
        "David S . Miller" <davem@davemloft.net>,
        Sasha Levin <sashal@kernel.org>, dccp@vger.kernel.org,
        netdev@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 109/251] dccp: Fix memleak in __feat_register_sp
Date:   Thu, 16 Jan 2020 12:34:18 -0500
Message-Id: <20200116173641.22137-69-sashal@kernel.org>
In-Reply-To: <20200116173641.22137-1-sashal@kernel.org>
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From: YueHaibing <yuehaibing@huawei.com>

[ Upstream commit 1d3ff0950e2b40dc861b1739029649d03f591820 ]

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")
Reviewed-by: Mukesh Ojha <mojha@codeaurora.org>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 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 f227f002c73d..db87d9f58019 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(fval.sp.vec);
+		return -ENOMEM;
+	}
+
+	return 0;
 }
 
 /**
-- 
2.20.1