linux-kernel - [PATCH] uio: uio_fsl_elbc_gpcm:: Add null pointer check to uio_fsl_elbc_gpcm

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Message-Id: <20251015064020.56589-1-liqiang01@kylinos.cn>
Date: Wed, 15 Oct 2025 14:40:20 +0800
From: Li Qiang <liqiang01@...inos.cn>
To: gregkh@...uxfoundation.org,
	alexandru.ardelean@...log.com
Cc: linux-kernel@...r.kernel.org,
	Li Qiang <liqiang01@...inos.cn>
Subject: [PATCH] uio: uio_fsl_elbc_gpcm:: Add null pointer check to uio_fsl_elbc_gpcm_probe

devm_kasprintf() returns a pointer to dynamically allocated memory
which can be NULL upon failure.

Fixes: d57801c45f53e ("uio: uio_fsl_elbc_gpcm: use device-managed allocators")

Signed-off-by: Li Qiang <liqiang01@...inos.cn>
---
 drivers/uio/uio_fsl_elbc_gpcm.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/uio/uio_fsl_elbc_gpcm.c b/drivers/uio/uio_fsl_elbc_gpcm.c
index 81454c3e2484..338dd2aaabc8 100644
--- a/drivers/uio/uio_fsl_elbc_gpcm.c
+++ b/drivers/uio/uio_fsl_elbc_gpcm.c
@@ -384,6 +384,11 @@ static int uio_fsl_elbc_gpcm_probe(struct platform_device *pdev)
 
 	/* set all UIO data */
 	info->mem[0].name = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%pOFn", node);
+	if (!info->mem[0].name) {
+		ret = -ENODEV;
+		goto out_err3;
+	}
+
 	info->mem[0].addr = res.start;
 	info->mem[0].size = resource_size(&res);
 	info->mem[0].memtype = UIO_MEM_PHYS;
@@ -423,6 +428,8 @@ static int uio_fsl_elbc_gpcm_probe(struct platform_device *pdev)
 out_err2:
 	if (priv->shutdown)
 		priv->shutdown(info, true);
+
+out_err3:
 	iounmap(info->mem[0].internal_addr);
 	return ret;
 }
-- 
2.25.1