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

Message ID 20210615013922.784296-10-yangyingliang@huawei.com
State Accepted
Commit a2f6ed4a44721d3a9fdf4da7e0743cb13866bf61
Headers show
Series
  • Untitled series #136699
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Commit Message

Yang Yingliang June 15, 2021, 1:39 a.m.
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@huawei.com>
---
 sound/soc/fsl/fsl_xcvr.c | 4 ++++
 1 file changed, 4 insertions(+)

Patch

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;