linux-kernel - [PATCH 4.4 111/138] IB/IWPM: Fix a potential skb leak

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Message-Id: <20160818135609.770443196@linuxfoundation.org>
Date:	Thu, 18 Aug 2016 15:58:41 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Mark Bloch <markb@...lanox.com>,
	Leon Romanovsky <leonro@...lanox.com>,
	Leon Romanovsky <leon@...nel.org>,
	Steve Wise <swise@...ngridcomputing.com>,
	Doug Ledford <dledford@...hat.com>
Subject: [PATCH 4.4 111/138] IB/IWPM: Fix a potential skb leak

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

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

From: Mark Bloch <markb@...lanox.com>

commit 5ed935e861a4cbf2158ad3386d6d26edd60d2658 upstream.

In case ibnl_put_msg fails in send_nlmsg_done,
the function returns with -ENOMEM without freeing.

This patch fixes this behavior.

Fixes: 30dc5e63d6a5 ("RDMA/core: Add support for iWARP Port Mapper user space service")
Signed-off-by: Mark Bloch <markb@...lanox.com>
Reviewed-by: Leon Romanovsky <leonro@...lanox.com>
Signed-off-by: Leon Romanovsky <leon@...nel.org>
Reviewed-by: Steve Wise <swise@...ngridcomputing.com>
Signed-off-by: Doug Ledford <dledford@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/infiniband/core/iwpm_util.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/infiniband/core/iwpm_util.c
+++ b/drivers/infiniband/core/iwpm_util.c
@@ -634,6 +634,7 @@ static int send_nlmsg_done(struct sk_buf
 	if (!(ibnl_put_msg(skb, &nlh, 0, 0, nl_client,
 			   RDMA_NL_IWPM_MAPINFO, NLM_F_MULTI))) {
 		pr_warn("%s Unable to put NLMSG_DONE\n", __func__);
+		dev_kfree_skb(skb);
 		return -ENOMEM;
 	}
 	nlh->nlmsg_type = NLMSG_DONE;