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Date: Tue, 6 Jul 2021 07:12:37 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Yang Yingliang <yangyingliang@...wei.com>, "David S . Miller" <davem@...emloft.net>, Sasha Levin <sashal@...nel.org>, linux-mips@...r.kernel.org, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 5.13 097/189] net: sgi: ioc3-eth: check return value after calling platform_get_resource() From: Yang Yingliang <yangyingliang@...wei.com> [ Upstream commit db8f7be1e1d64fbf113a456ef94534fbf5e9a9af ] It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Signed-off-by: Yang Yingliang <yangyingliang@...wei.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Sasha Levin <sashal@...nel.org> --- drivers/net/ethernet/sgi/ioc3-eth.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c index 6eef0f45b133..2b29fd4cbdf4 100644 --- a/drivers/net/ethernet/sgi/ioc3-eth.c +++ b/drivers/net/ethernet/sgi/ioc3-eth.c @@ -835,6 +835,10 @@ static int ioc3eth_probe(struct platform_device *pdev) int err; regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!regs) { + dev_err(&pdev->dev, "Invalid resource\n"); + return -EINVAL; + } /* get mac addr from one wire prom */ if (ioc3eth_get_mac_addr(regs, mac_addr)) return -EPROBE_DEFER; /* not available yet */ -- 2.30.2
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