ASoC: imx-card: Add NULL check in imx_card_probe()

JIRA: https://issues.redhat.com/browse/RHEL-80657

CVE: CVE-2025-22066

commit 93d3460
Author: Henry Martin <bsdhenrymartin@gmail.com>
Date: Tue Apr 1 22:25:10 2025 +0800

    ASoC: imx-card: Add NULL check in imx_card_probe()

    devm_kasprintf() returns NULL when memory allocation fails. Currently,
    imx_card_probe() does not check for this case, which results in a NULL
    pointer dereference.

    Add NULL check after devm_kasprintf() to prevent this issue.

    Fixes: aa73670 ("ASoC: imx-card: Add imx-card machine driver")
    Signed-off-by: Henry Martin <bsdhenrymartin@gmail.com>
    Reviewed-by: Frank Li <Frank.Li@nxp.com>
    Link: https://patch.msgid.link/20250401142510.29900-1-bsdhenrymartin@gmail.com
    Signed-off-by: Mark Brown <broonie@kernel.org>

Signed-off-by: Jaroslav Kysela <jkysela@redhat.com>

Author: jkysela-rh

sound/soc/fsl/imx-card.c

@@ -772,6 +772,8 @@ static int imx_card_probe(struct platform_device *pdev)
 				data->dapm_routes[i].sink =
 					devm_kasprintf(&pdev->dev, GFP_KERNEL, "%d %s",
 						       i + 1, "Playback");
+				if (!data->dapm_routes[i].sink)
+					return -ENOMEM;
 				data->dapm_routes[i].source = "CPU-Playback";
 			}
 		}
@@ -789,6 +791,8 @@ static int imx_card_probe(struct platform_device *pdev)
 				data->dapm_routes[i].source =
 					devm_kasprintf(&pdev->dev, GFP_KERNEL, "%d %s",
 						       i + 1, "Capture");
+				if (!data->dapm_routes[i].source)
+					return -ENOMEM;
 				data->dapm_routes[i].sink = "CPU-Capture";
 			}
 		}