[PATCH net-next] net: mscc: ocelot: check return value after calling platform_get_resource()
From: Yang Yingliang <hidden>
Date: 2021-06-04 09:28:21
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Subsystem:
networking drivers, networking [dsa], ocelot ethernet switch driver, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Andrew Lunn, Vladimir Oltean, Vladimir Oltean, Linus Torvalds
It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Signed-off-by: Yang Yingliang <redacted> --- drivers/net/dsa/ocelot/seville_vsc9953.c | 4 ++++ 1 file changed, 4 insertions(+)
diff --git a/drivers/net/dsa/ocelot/seville_vsc9953.c b/drivers/net/dsa/ocelot/seville_vsc9953.c
index 84f93a874d50..b514e2d05b6f 100644
--- a/drivers/net/dsa/ocelot/seville_vsc9953.c
+++ b/drivers/net/dsa/ocelot/seville_vsc9953.c@@ -1206,6 +1206,10 @@ static int seville_probe(struct platform_device *pdev) felix->info = &seville_info_vsc9953; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) { + err = -EINVAL; + dev_err(&pdev->dev, "Invalid resource\n"); + } felix->switch_base = res->start; ds = kzalloc(sizeof(struct dsa_switch), GFP_KERNEL);
--
2.25.1