linux-kernel - Re: [PATCH] SUNRPC: Remove resource leak in svc_rdma_send

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Message-ID: <4D8258DF.3030302@opengridcomputing.com>
Date:	Thu, 17 Mar 2011 12:54:23 -0600
From:	Tom Tucker <tom@...ngridcomputing.com>
To:	"J. Bruce Fields" <bfields@...ldses.org>
CC:	Jesper Juhl <jj@...osbits.net>, linux-nfs@...r.kernel.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Pavel Emelyanov <xemul@...nvz.org>,
	Chuck Lever <chuck.lever@...cle.com>,
	Tejun Heo <tj@...nel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Trond Myklebust <Trond.Myklebust@...app.com>,
	Neil Brown <neilb@...e.de>
Subject: Re: [PATCH] SUNRPC: Remove resource leak in svc_rdma_send_error()

Hi Bruce,

I believe this fix is correct.

Tom

On 3/17/11 12:37 PM, J. Bruce Fields wrote:
> On Sat, Jan 22, 2011 at 10:40:20PM +0100, Jesper Juhl wrote:
>> We leak the memory allocated to 'ctxt' when we return after
>> 'ib_dma_mapping_error()' returns !=0.
>>
>> Signed-off-by: Jesper Juhl<jj@...osbits.net>
> I don't know this code, but I can't see how that could be wrong....
> Applying unless Tom tells me otherwise.
>
> --b.
>
>> ---
>>   svc_rdma_transport.c |    1 +
>>   1 file changed, 1 insertion(+)
>>
>>    compile tested only
>>
>> diff --git a/net/sunrpc/xprtrdma/svc_rdma_transport.c b/net/sunrpc/xprtrdma/svc_rdma_transport.c
>> index 9df1ead..1a10dcd 100644
>> --- a/net/sunrpc/xprtrdma/svc_rdma_transport.c
>> +++ b/net/sunrpc/xprtrdma/svc_rdma_transport.c
>> @@ -1335,6 +1335,7 @@ void svc_rdma_send_error(struct svcxprt_rdma *xprt, struct rpcrdma_msg *rmsgp,
>>   					    p, 0, length, DMA_FROM_DEVICE);
>>   	if (ib_dma_mapping_error(xprt->sc_cm_id->device, ctxt->sge[0].addr)) {
>>   		put_page(p);
>> +		svc_rdma_put_context(ctxt, 1);
>>   		return;
>>   	}
>>   	atomic_inc(&xprt->sc_dma_used);
>>
>>
>> -- 
>> Jesper Juhl<jj@...osbits.net>             http://www.chaosbits.net/
>> Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
>> Plain text mails only, please.
>>
> --
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