linux-kernel - Re: [PATCH v2] dmaengine: ti: Fix refcount leak in ti_dra7_xbar_route

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <b43ae2ad-4eb7-5376-6e3a-0a8310acc34a@gmail.com>
Date:   Sat, 4 Jun 2022 23:49:33 +0300
From:   Péter Ujfalusi <peter.ujfalusi@...il.com>
To:     Miaoqian Lin <linmq006@...il.com>, dave.jiang@...el.com,
        Vinod Koul <vkoul@...nel.org>, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] dmaengine: ti: Fix refcount leak in
 ti_dra7_xbar_route_allocate



On 01/06/2022 13:55, Miaoqian Lin wrote:
> of_parse_phandle() returns a node pointer with refcount
> incremented, we should use of_node_put() on it when not needed anymore.
> 
> Add missing of_node_put() in to fix this.

Acked-by: Peter Ujfalusi <peter.ujfalusi@...il.com>

> 
> Fixes: ec9bfa1e1a79 ("dmaengine: ti-dma-crossbar: dra7: Use bitops instead of idr")
> Signed-off-by: Miaoqian Lin <linmq006@...il.com>
> ---
> - split v1 into two patches.
> v1 link: https://lore.kernel.org/r/20220512051815.11946-1-linmq006@gmail.com
> ---
>  drivers/dma/ti/dma-crossbar.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/dma/ti/dma-crossbar.c b/drivers/dma/ti/dma-crossbar.c
> index 71d24fc07c00..e34cfb50d241 100644
> --- a/drivers/dma/ti/dma-crossbar.c
> +++ b/drivers/dma/ti/dma-crossbar.c
> @@ -268,6 +268,7 @@ static void *ti_dra7_xbar_route_allocate(struct of_phandle_args *dma_spec,
>  		mutex_unlock(&xbar->mutex);
>  		dev_err(&pdev->dev, "Run out of free DMA requests\n");
>  		kfree(map);
> +		of_node_put(dma_spec->np);
>  		return ERR_PTR(-ENOMEM);
>  	}
>  	set_bit(map->xbar_out, xbar->dma_inuse);

-- 
Péter