* [PATCH 5.4] net: moxa: Use devm_platform_get_and_ioremap_resource()
@ 2021-07-16 9:32 Yang Yingliang
2021-07-19 12:40 ` Greg KH
0 siblings, 1 reply; 2+ messages in thread
From: Yang Yingliang @ 2021-07-16 9:32 UTC (permalink / raw)
To: sudipm.mukherjee, gregkh; +Cc: linux-kernel, stable, davem, sashal
[ Upstream commit 35cba15a504bf4f585bb9d78f47b22b28a1a06b2 ]
Use devm_platform_get_and_ioremap_resource() to simplify
code and avoid a null-ptr-deref by checking 'res' in it.
[yyl: since devm_platform_get_and_ioremap_resource() is introduced
in linux-5.7, so just check the return value after calling
platform_get_resource()]
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/ethernet/moxa/moxart_ether.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/net/ethernet/moxa/moxart_ether.c b/drivers/net/ethernet/moxa/moxart_ether.c
index f70bb81e1ed65..caf7051302725 100644
--- a/drivers/net/ethernet/moxa/moxart_ether.c
+++ b/drivers/net/ethernet/moxa/moxart_ether.c
@@ -481,6 +481,10 @@ static int moxart_mac_probe(struct platform_device *pdev)
priv->pdev = pdev;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ ret = -EINVAL;
+ goto init_fail;
+ }
ndev->base_addr = res->start;
priv->base = devm_ioremap_resource(p_dev, res);
if (IS_ERR(priv->base)) {
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH 5.4] net: moxa: Use devm_platform_get_and_ioremap_resource()
2021-07-16 9:32 [PATCH 5.4] net: moxa: Use devm_platform_get_and_ioremap_resource() Yang Yingliang
@ 2021-07-19 12:40 ` Greg KH
0 siblings, 0 replies; 2+ messages in thread
From: Greg KH @ 2021-07-19 12:40 UTC (permalink / raw)
To: Yang Yingliang; +Cc: sudipm.mukherjee, linux-kernel, stable, davem, sashal
On Fri, Jul 16, 2021 at 05:32:45PM +0800, Yang Yingliang wrote:
> [ Upstream commit 35cba15a504bf4f585bb9d78f47b22b28a1a06b2 ]
>
> Use devm_platform_get_and_ioremap_resource() to simplify
> code and avoid a null-ptr-deref by checking 'res' in it.
>
> [yyl: since devm_platform_get_and_ioremap_resource() is introduced
> in linux-5.7, so just check the return value after calling
> platform_get_resource()]
>
> Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
> Signed-off-by: David S. Miller <davem@davemloft.net>
> ---
> drivers/net/ethernet/moxa/moxart_ether.c | 4 ++++
> 1 file changed, 4 insertions(+)
Now queued up, thanks.
greg k-h
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-07-16 9:32 [PATCH 5.4] net: moxa: Use devm_platform_get_and_ioremap_resource() Yang Yingliang
2021-07-19 12:40 ` Greg KH
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