linux-kernel - [PATCH 4.19 003/280] 9p/net: fix memory leak in p9_client

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Date:   Fri, 22 Mar 2019 12:12:36 +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, Hulk Robot <hulkci@...wei.com>,
        zhengbin <zhengbin13@...wei.com>,
        Dominique Martinet <dominique.martinet@....fr>
Subject: [PATCH 4.19 003/280] 9p/net: fix memory leak in p9_client_create

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

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

From: zhengbin <zhengbin13@...wei.com>

commit bb06c388fa20ae24cfe80c52488de718a7e3a53f upstream.

If msize is less than 4096, we should close and put trans, destroy
tagpool, not just free client. This patch fixes that.

Link: http://lkml.kernel.org/m/1552464097-142659-1-git-send-email-zhengbin13@huawei.com
Cc: stable@...r.kernel.org
Fixes: 574d356b7a02 ("9p/net: put a lower bound on msize")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: zhengbin <zhengbin13@...wei.com>
Signed-off-by: Dominique Martinet <dominique.martinet@....fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 net/9p/client.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1073,7 +1073,7 @@ struct p9_client *p9_client_create(const
 		p9_debug(P9_DEBUG_ERROR,
 			 "Please specify a msize of at least 4k\n");
 		err = -EINVAL;
-		goto free_client;
+		goto close_trans;
 	}
 
 	err = p9_client_version(clnt);