linux-kernel - [PATCH 4.9 25/56] tipc: error path leak fixes in tipc_enable

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Message-Id: <20180302084450.868200317@linuxfoundation.org>
Date:   Fri,  2 Mar 2018 09:51:11 +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, Ying Xue <ying.xue@...driver.com>,
        Jon Maloy <jon.maloy@...csson.com>,
        Tommi Rantala <tommi.t.rantala@...ia.com>,
        "David S. Miller" <davem@...emloft.net>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.9 25/56] tipc: error path leak fixes in tipc_enable_bearer()

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

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

From: Tommi Rantala <tommi.t.rantala@...ia.com>


[ Upstream commit 19142551b2be4a9e13838099fde1351386e5e007 ]

Fix memory leak in tipc_enable_bearer() if enable_media() fails, and
cleanup with bearer_disable() if tipc_mon_create() fails.

Acked-by: Ying Xue <ying.xue@...driver.com>
Acked-by: Jon Maloy <jon.maloy@...csson.com>
Signed-off-by: Tommi Rantala <tommi.t.rantala@...ia.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 net/tipc/bearer.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/net/tipc/bearer.c
+++ b/net/tipc/bearer.c
@@ -322,6 +322,7 @@ restart:
 	if (res) {
 		pr_warn("Bearer <%s> rejected, enable failure (%d)\n",
 			name, -res);
+		kfree(b);
 		return -EINVAL;
 	}
 
@@ -345,8 +346,10 @@ restart:
 	if (skb)
 		tipc_bearer_xmit_skb(net, bearer_id, skb, &b->bcast_addr);
 
-	if (tipc_mon_create(net, bearer_id))
+	if (tipc_mon_create(net, bearer_id)) {
+		bearer_disable(net, b);
 		return -ENOMEM;
+	}
 
 	pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n",
 		name,