linux-kernel - [PATCH v1] dmaengine: ti: Add NULL check in udma

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Message-Id: <20250402023900.43440-1-bsdhenrymartin@gmail.com>
Date: Wed,  2 Apr 2025 10:39:00 +0800
From: Henry Martin <bsdhenrymartin@...il.com>
To: peter.ujfalusi@...il.com,
	vkoul@...nel.org
Cc: dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Henry Martin <bsdhenrymartin@...il.com>
Subject: [PATCH v1] dmaengine: ti: Add NULL check in udma_probe()

devm_kasprintf() returns NULL when memory allocation fails. Currently,
udma_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: 25dcb5dd7b7c ("dmaengine: ti: New driver for K3 UDMA")
Signed-off-by: Henry Martin <bsdhenrymartin@...il.com>
---
 drivers/dma/ti/k3-udma.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 7ed1956b4642..f1c2f8170730 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -5582,7 +5582,8 @@ static int udma_probe(struct platform_device *pdev)
 		uc->config.dir = DMA_MEM_TO_MEM;
 		uc->name = devm_kasprintf(dev, GFP_KERNEL, "%s chan%d",
 					  dev_name(dev), i);
-
+		if (!uc->name)
+			return -ENOMEM;
 		vchan_init(&uc->vc, &ud->ddev);
 		/* Use custom vchan completion handling */
 		tasklet_setup(&uc->vc.task, udma_vchan_complete);
-- 
2.34.1