[PATCH -next v2 9/9] ASoC: fsl_xcvr: check return value after calling platform_get_resource_byname()

From: Yang Yingliang
Date: Mon Jun 14 2021 - 22:54:27 EST


It will cause null-ptr-deref if platform_get_resource_byname() returns NULL,
we need check the return value.

Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
---
sound/soc/fsl/fsl_xcvr.c | 4 ++++
1 file changed, 4 insertions(+)

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;
--
2.25.1