From a2f6ed4a44721d3a9fdf4da7e0743cb13866bf61 Mon Sep 17 00:00:00 2001 From: Yang Yingliang Date: Tue, 15 Jun 2021 09:39:22 +0800 Subject: ASoC: fsl_xcvr: check return value after calling platform_get_resource_byname() It will cause null-ptr-deref if platform_get_resource_byname() returns NULL, we need check the return value. Signed-off-by: Yang Yingliang Link: https://lore.kernel.org/r/20210615013922.784296-10-yangyingliang@huawei.com Signed-off-by: Mark Brown --- sound/soc/fsl/fsl_xcvr.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'sound/soc/fsl') diff --git a/sound/soc/fsl/fsl_xcvr.c b/sound/soc/fsl/fsl_xcvr.c index df7c189d97dd..1330e190e1ff 100644 --- a/sound/soc/fsl/fsl_xcvr.c +++ b/sound/soc/fsl/fsl_xcvr.c @@ -1202,6 +1202,10 @@ static int fsl_xcvr_probe(struct platform_device *pdev) rx_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rxfifo"); tx_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "txfifo"); + if (!rx_res || !tx_res) { + dev_err(dev, "could not find rxfifo or txfifo resource\n"); + return -EINVAL; + } xcvr->dma_prms_rx.chan_name = "rx"; xcvr->dma_prms_tx.chan_name = "tx"; xcvr->dma_prms_rx.addr = rx_res->start; -- cgit