From: Yang Yingliang <yangyingliang@huawei.com> stable inclusion from stable-5.10.51 commit 278dc34b711227be81073b3d81ba81341c520842 bugzilla: 175263 https://gitee.com/openeuler/kernel/issues/I4DT6F Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 20f1932e2282c58cb5ac59517585206cf5b385ae ] It will cause null-ptr-deref if platform_get_resource() returns NULL, we need check the return value. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Chen Jun <chenjun102@huawei.com> Acked-by: Weilong Chen <chenweilong@huawei.com> Signed-off-by: Chen Jun <chenjun102@huawei.com> --- drivers/net/ethernet/micrel/ks8842.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ethernet/micrel/ks8842.c b/drivers/net/ethernet/micrel/ks8842.c index caa251d0e381..b27713906d3a 100644 --- a/drivers/net/ethernet/micrel/ks8842.c +++ b/drivers/net/ethernet/micrel/ks8842.c @@ -1135,6 +1135,10 @@ static int ks8842_probe(struct platform_device *pdev) unsigned i; iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!iomem) { + dev_err(&pdev->dev, "Invalid resource\n"); + return -EINVAL; + } if (!request_mem_region(iomem->start, resource_size(iomem), DRV_NAME)) goto err_mem_region; -- 2.20.1