From 4bfa07300b9334b487ed4f3d4901c35ebb31b7ca Mon Sep 17 00:00:00 2001 From: Zhang Changzhong Date: Fri, 4 Dec 2020 16:31:57 +0800 Subject: memory: jz4780_nemc: Fix potential NULL dereference in jz4780_nemc_probe() platform_get_resource() may fail and return NULL, so we should better check it's return value to avoid a NULL pointer dereference a bit later in the code. This is detected by Coccinelle semantic patch. Fixes: 911a88829725 ("memory: jz4780-nemc: driver for the NEMC on JZ4780 SoCs") Signed-off-by: Zhang Changzhong Acked-by: Paul Cercueil Link: https://lore.kernel.org/r/1607070717-32880-1-git-send-email-zhangchangzhong@huawei.com Signed-off-by: Krzysztof Kozlowski --- drivers/memory/jz4780-nemc.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'drivers') diff --git a/drivers/memory/jz4780-nemc.c b/drivers/memory/jz4780-nemc.c index 608ae925e641..555f7ac3b7dd 100644 --- a/drivers/memory/jz4780-nemc.c +++ b/drivers/memory/jz4780-nemc.c @@ -291,6 +291,8 @@ static int jz4780_nemc_probe(struct platform_device *pdev) nemc->dev = dev; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + if (!res) + return -EINVAL; /* * The driver currently only uses the registers up to offset -- cgit v1.2.3