netdev - [PATCH net-next 5/5] tipc: deal with return value of tipc_conn

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Date:	Mon, 4 May 2015 10:36:48 +0800
From:	Ying Xue <ying.xue@...driver.com>
To:	<davem@...emloft.net>
CC:	<jon.maloy@...csson.com>, <Paul.Gortmaker@...driver.com>,
	<erik.hugne@...csson.com>, <netdev@...r.kernel.org>,
	<tipc-discussion@...ts.sourceforge.net>
Subject: [PATCH net-next 5/5] tipc: deal with return value of tipc_conn_new callback

Once tipc_conn_new() returns NULL, the connection should be shut
down immediately, otherwise, oops may happen due to the NULL pointer.

Signed-off-by: Ying Xue <ying.xue@...driver.com>
Reviewed-by: Jon Maloy <jon.maloy@...cson.com>
---
 net/tipc/server.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/tipc/server.c b/net/tipc/server.c
index 77ff03e..a91a2f7 100644
--- a/net/tipc/server.c
+++ b/net/tipc/server.c
@@ -309,6 +309,10 @@ static int tipc_accept_from_sock(struct tipc_conn *con)
 
 	/* Notify that new connection is incoming */
 	newcon->usr_data = s->tipc_conn_new(newcon->conid);
+	if (!newcon->usr_data) {
+		sock_release(newsock);
+		return -ENOMEM;
+	}
 
 	/* Wake up receive process in case of 'SYN+' message */
 	newsock->sk->sk_data_ready(newsock->sk);
-- 
1.7.9.5

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